/*
 *  ARM translation
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *  Copyright (c) 2005-2007 CodeSourcery
 *  Copyright (c) 2007 OpenedHand, Ltd.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
#include "qemu/osdep.h"

#include "cpu.h"
#include "internals.h"
#include "disas/disas.h"
#include "exec/exec-all.h"
#include "tcg/tcg-op.h"
#include "tcg/tcg-op-gvec.h"
#include "qemu/log.h"
#include "qemu/bitops.h"
#include "arm_ldst.h"
#include "semihosting/semihost.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "exec/log.h"
#include "cpregs.h"


#define ENABLE_ARCH_4T    arm_dc_feature(s, ARM_FEATURE_V4T)
#define ENABLE_ARCH_5     arm_dc_feature(s, ARM_FEATURE_V5)
/* currently all emulated v5 cores are also v5TE, so don't bother */
#define ENABLE_ARCH_5TE   arm_dc_feature(s, ARM_FEATURE_V5)
#define ENABLE_ARCH_5J    dc_isar_feature(aa32_jazelle, s)
#define ENABLE_ARCH_6     arm_dc_feature(s, ARM_FEATURE_V6)
#define ENABLE_ARCH_6K    arm_dc_feature(s, ARM_FEATURE_V6K)
#define ENABLE_ARCH_6T2   arm_dc_feature(s, ARM_FEATURE_THUMB2)
#define ENABLE_ARCH_7     arm_dc_feature(s, ARM_FEATURE_V7)
#define ENABLE_ARCH_8     arm_dc_feature(s, ARM_FEATURE_V8)

#include "translate.h"
#include "translate-a32.h"

/* These are TCG temporaries used only by the legacy iwMMXt decoder */
static TCGv_i64 cpu_V0, cpu_V1, cpu_M0;
/* These are TCG globals which alias CPUARMState fields */
static TCGv_i32 cpu_R[16];
TCGv_i32 cpu_CF, cpu_NF, cpu_VF, cpu_ZF;
TCGv_i64 cpu_exclusive_addr;
TCGv_i64 cpu_exclusive_val;

#include "exec/gen-icount.h"

static const char * const regnames[] =
    { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
      "r8", "r9", "r10", "r11", "r12", "r13", "r14", "pc" };


/* initialize TCG globals.  */
void arm_translate_init(void)
{
    int i;

    for (i = 0; i < 16; i++) {
        cpu_R[i] = tcg_global_mem_new_i32(cpu_env,
                                          offsetof(CPUARMState, regs[i]),
                                          regnames[i]);
    }
    cpu_CF = tcg_global_mem_new_i32(cpu_env, offsetof(CPUARMState, CF), "CF");
    cpu_NF = tcg_global_mem_new_i32(cpu_env, offsetof(CPUARMState, NF), "NF");
    cpu_VF = tcg_global_mem_new_i32(cpu_env, offsetof(CPUARMState, VF), "VF");
    cpu_ZF = tcg_global_mem_new_i32(cpu_env, offsetof(CPUARMState, ZF), "ZF");

    cpu_exclusive_addr = tcg_global_mem_new_i64(cpu_env,
        offsetof(CPUARMState, exclusive_addr), "exclusive_addr");
    cpu_exclusive_val = tcg_global_mem_new_i64(cpu_env,
        offsetof(CPUARMState, exclusive_val), "exclusive_val");

    a64_translate_init();
}

uint64_t asimd_imm_const(uint32_t imm, int cmode, int op)
{
    /* Expand the encoded constant as per AdvSIMDExpandImm pseudocode */
    switch (cmode) {
    case 0: case 1:
        /* no-op */
        break;
    case 2: case 3:
        imm <<= 8;
        break;
    case 4: case 5:
        imm <<= 16;
        break;
    case 6: case 7:
        imm <<= 24;
        break;
    case 8: case 9:
        imm |= imm << 16;
        break;
    case 10: case 11:
        imm = (imm << 8) | (imm << 24);
        break;
    case 12:
        imm = (imm << 8) | 0xff;
        break;
    case 13:
        imm = (imm << 16) | 0xffff;
        break;
    case 14:
        if (op) {
            /*
             * This and cmode == 15 op == 1 are the only cases where
             * the top and bottom 32 bits of the encoded constant differ.
             */
            uint64_t imm64 = 0;
            int n;

            for (n = 0; n < 8; n++) {
                if (imm & (1 << n)) {
                    imm64 |= (0xffULL << (n * 8));
                }
            }
            return imm64;
        }
        imm |= (imm << 8) | (imm << 16) | (imm << 24);
        break;
    case 15:
        if (op) {
            /* Reserved encoding for AArch32; valid for AArch64 */
            uint64_t imm64 = (uint64_t)(imm & 0x3f) << 48;
            if (imm & 0x80) {
                imm64 |= 0x8000000000000000ULL;
            }
            if (imm & 0x40) {
                imm64 |= 0x3fc0000000000000ULL;
            } else {
                imm64 |= 0x4000000000000000ULL;
            }
            return imm64;
        }
        imm = ((imm & 0x80) << 24) | ((imm & 0x3f) << 19)
            | ((imm & 0x40) ? (0x1f << 25) : (1 << 30));
        break;
    }
    if (op) {
        imm = ~imm;
    }
    return dup_const(MO_32, imm);
}

/* Generate a label used for skipping this instruction */
void arm_gen_condlabel(DisasContext *s)
{
    if (!s->condjmp) {
        s->condlabel = gen_disas_label(s);
        s->condjmp = 1;
    }
}

/* Flags for the disas_set_da_iss info argument:
 * lower bits hold the Rt register number, higher bits are flags.
 */
typedef enum ISSInfo {
    ISSNone = 0,
    ISSRegMask = 0x1f,
    ISSInvalid = (1 << 5),
    ISSIsAcqRel = (1 << 6),
    ISSIsWrite = (1 << 7),
    ISSIs16Bit = (1 << 8),
} ISSInfo;

/*
 * Store var into env + offset to a member with size bytes.
 * Free var after use.
 */
void store_cpu_offset(TCGv_i32 var, int offset, int size)
{
    switch (size) {
    case 1:
        tcg_gen_st8_i32(var, cpu_env, offset);
        break;
    case 4:
        tcg_gen_st_i32(var, cpu_env, offset);
        break;
    default:
        g_assert_not_reached();
    }
}

/* Save the syndrome information for a Data Abort */
static void disas_set_da_iss(DisasContext *s, MemOp memop, ISSInfo issinfo)
{
    uint32_t syn;
    int sas = memop & MO_SIZE;
    bool sse = memop & MO_SIGN;
    bool is_acqrel = issinfo & ISSIsAcqRel;
    bool is_write = issinfo & ISSIsWrite;
    bool is_16bit = issinfo & ISSIs16Bit;
    int srt = issinfo & ISSRegMask;

    if (issinfo & ISSInvalid) {
        /* Some callsites want to conditionally provide ISS info,
         * eg "only if this was not a writeback"
         */
        return;
    }

    if (srt == 15) {
        /* For AArch32, insns where the src/dest is R15 never generate
         * ISS information. Catching that here saves checking at all
         * the call sites.
         */
        return;
    }

    syn = syn_data_abort_with_iss(0, sas, sse, srt, 0, is_acqrel,
                                  0, 0, 0, is_write, 0, is_16bit);
    disas_set_insn_syndrome(s, syn);
}

static inline int get_a32_user_mem_index(DisasContext *s)
{
    /* Return the core mmu_idx to use for A32/T32 "unprivileged load/store"
     * insns:
     *  if PL2, UNPREDICTABLE (we choose to implement as if PL0)
     *  otherwise, access as if at PL0.
     */
    switch (s->mmu_idx) {
    case ARMMMUIdx_E3:
    case ARMMMUIdx_E2:        /* this one is UNPREDICTABLE */
    case ARMMMUIdx_E10_0:
    case ARMMMUIdx_E10_1:
    case ARMMMUIdx_E10_1_PAN:
        return arm_to_core_mmu_idx(ARMMMUIdx_E10_0);
    case ARMMMUIdx_MUser:
    case ARMMMUIdx_MPriv:
        return arm_to_core_mmu_idx(ARMMMUIdx_MUser);
    case ARMMMUIdx_MUserNegPri:
    case ARMMMUIdx_MPrivNegPri:
        return arm_to_core_mmu_idx(ARMMMUIdx_MUserNegPri);
    case ARMMMUIdx_MSUser:
    case ARMMMUIdx_MSPriv:
        return arm_to_core_mmu_idx(ARMMMUIdx_MSUser);
    case ARMMMUIdx_MSUserNegPri:
    case ARMMMUIdx_MSPrivNegPri:
        return arm_to_core_mmu_idx(ARMMMUIdx_MSUserNegPri);
    default:
        g_assert_not_reached();
    }
}

/* The pc_curr difference for an architectural jump. */
static target_long jmp_diff(DisasContext *s, target_long diff)
{
    return diff + (s->thumb ? 4 : 8);
}

static void gen_pc_plus_diff(DisasContext *s, TCGv_i32 var, target_long diff)
{
    assert(s->pc_save != -1);
    if (tb_cflags(s->base.tb) & CF_PCREL) {
        tcg_gen_addi_i32(var, cpu_R[15], (s->pc_curr - s->pc_save) + diff);
    } else {
        tcg_gen_movi_i32(var, s->pc_curr + diff);
    }
}

/* Set a variable to the value of a CPU register.  */
void load_reg_var(DisasContext *s, TCGv_i32 var, int reg)
{
    if (reg == 15) {
        gen_pc_plus_diff(s, var, jmp_diff(s, 0));
    } else {
        tcg_gen_mov_i32(var, cpu_R[reg]);
    }
}

/*
 * Create a new temp, REG + OFS, except PC is ALIGN(PC, 4).
 * This is used for load/store for which use of PC implies (literal),
 * or ADD that implies ADR.
 */
TCGv_i32 add_reg_for_lit(DisasContext *s, int reg, int ofs)
{
    TCGv_i32 tmp = tcg_temp_new_i32();

    if (reg == 15) {
        /*
         * This address is computed from an aligned PC:
         * subtract off the low bits.
         */
        gen_pc_plus_diff(s, tmp, jmp_diff(s, ofs - (s->pc_curr & 3)));
    } else {
        tcg_gen_addi_i32(tmp, cpu_R[reg], ofs);
    }
    return tmp;
}

/* Set a CPU register.  The source must be a temporary and will be
   marked as dead.  */
void store_reg(DisasContext *s, int reg, TCGv_i32 var)
{
    if (reg == 15) {
        /* In Thumb mode, we must ignore bit 0.
         * In ARM mode, for ARMv4 and ARMv5, it is UNPREDICTABLE if bits [1:0]
         * are not 0b00, but for ARMv6 and above, we must ignore bits [1:0].
         * We choose to ignore [1:0] in ARM mode for all architecture versions.
         */
        tcg_gen_andi_i32(var, var, s->thumb ? ~1 : ~3);
        s->base.is_jmp = DISAS_JUMP;
        s->pc_save = -1;
    } else if (reg == 13 && arm_dc_feature(s, ARM_FEATURE_M)) {
        /* For M-profile SP bits [1:0] are always zero */
        tcg_gen_andi_i32(var, var, ~3);
    }
    tcg_gen_mov_i32(cpu_R[reg], var);
}

/*
 * Variant of store_reg which applies v8M stack-limit checks before updating
 * SP. If the check fails this will result in an exception being taken.
 * We disable the stack checks for CONFIG_USER_ONLY because we have
 * no idea what the stack limits should be in that case.
 * If stack checking is not being done this just acts like store_reg().
 */
static void store_sp_checked(DisasContext *s, TCGv_i32 var)
{
#ifndef CONFIG_USER_ONLY
    if (s->v8m_stackcheck) {
        gen_helper_v8m_stackcheck(cpu_env, var);
    }
#endif
    store_reg(s, 13, var);
}

/* Value extensions.  */
#define gen_uxtb(var) tcg_gen_ext8u_i32(var, var)
#define gen_uxth(var) tcg_gen_ext16u_i32(var, var)
#define gen_sxtb(var) tcg_gen_ext8s_i32(var, var)
#define gen_sxth(var) tcg_gen_ext16s_i32(var, var)

#define gen_sxtb16(var) gen_helper_sxtb16(var, var)
#define gen_uxtb16(var) gen_helper_uxtb16(var, var)

void gen_set_cpsr(TCGv_i32 var, uint32_t mask)
{
    gen_helper_cpsr_write(cpu_env, var, tcg_constant_i32(mask));
}

static void gen_rebuild_hflags(DisasContext *s, bool new_el)
{
    bool m_profile = arm_dc_feature(s, ARM_FEATURE_M);

    if (new_el) {
        if (m_profile) {
            gen_helper_rebuild_hflags_m32_newel(cpu_env);
        } else {
            gen_helper_rebuild_hflags_a32_newel(cpu_env);
        }
    } else {
        TCGv_i32 tcg_el = tcg_constant_i32(s->current_el);
        if (m_profile) {
            gen_helper_rebuild_hflags_m32(cpu_env, tcg_el);
        } else {
            gen_helper_rebuild_hflags_a32(cpu_env, tcg_el);
        }
    }
}

static void gen_exception_internal(int excp)
{
    assert(excp_is_internal(excp));
    gen_helper_exception_internal(cpu_env, tcg_constant_i32(excp));
}

static void gen_singlestep_exception(DisasContext *s)
{
    /* We just completed step of an insn. Move from Active-not-pending
     * to Active-pending, and then also take the swstep exception.
     * This corresponds to making the (IMPDEF) choice to prioritize
     * swstep exceptions over asynchronous exceptions taken to an exception
     * level where debug is disabled. This choice has the advantage that
     * we do not need to maintain internal state corresponding to the
     * ISV/EX syndrome bits between completion of the step and generation
     * of the exception, and our syndrome information is always correct.
     */
    gen_ss_advance(s);
    gen_swstep_exception(s, 1, s->is_ldex);
    s->base.is_jmp = DISAS_NORETURN;
}

void clear_eci_state(DisasContext *s)
{
    /*
     * Clear any ECI/ICI state: used when a load multiple/store
     * multiple insn executes.
     */
    if (s->eci) {
        store_cpu_field_constant(0, condexec_bits);
        s->eci = 0;
    }
}

static void gen_smul_dual(TCGv_i32 a, TCGv_i32 b)
{
    TCGv_i32 tmp1 = tcg_temp_new_i32();
    TCGv_i32 tmp2 = tcg_temp_new_i32();
    tcg_gen_ext16s_i32(tmp1, a);
    tcg_gen_ext16s_i32(tmp2, b);
    tcg_gen_mul_i32(tmp1, tmp1, tmp2);
    tcg_gen_sari_i32(a, a, 16);
    tcg_gen_sari_i32(b, b, 16);
    tcg_gen_mul_i32(b, b, a);
    tcg_gen_mov_i32(a, tmp1);
}

/* Byteswap each halfword.  */
void gen_rev16(TCGv_i32 dest, TCGv_i32 var)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    TCGv_i32 mask = tcg_constant_i32(0x00ff00ff);
    tcg_gen_shri_i32(tmp, var, 8);
    tcg_gen_and_i32(tmp, tmp, mask);
    tcg_gen_and_i32(var, var, mask);
    tcg_gen_shli_i32(var, var, 8);
    tcg_gen_or_i32(dest, var, tmp);
}

/* Byteswap low halfword and sign extend.  */
static void gen_revsh(TCGv_i32 dest, TCGv_i32 var)
{
    tcg_gen_bswap16_i32(var, var, TCG_BSWAP_OS);
}

/* Dual 16-bit add.  Result placed in t0 and t1 is marked as dead.
    tmp = (t0 ^ t1) & 0x8000;
    t0 &= ~0x8000;
    t1 &= ~0x8000;
    t0 = (t0 + t1) ^ tmp;
 */

static void gen_add16(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    tcg_gen_xor_i32(tmp, t0, t1);
    tcg_gen_andi_i32(tmp, tmp, 0x8000);
    tcg_gen_andi_i32(t0, t0, ~0x8000);
    tcg_gen_andi_i32(t1, t1, ~0x8000);
    tcg_gen_add_i32(t0, t0, t1);
    tcg_gen_xor_i32(dest, t0, tmp);
}

/* Set N and Z flags from var.  */
static inline void gen_logic_CC(TCGv_i32 var)
{
    tcg_gen_mov_i32(cpu_NF, var);
    tcg_gen_mov_i32(cpu_ZF, var);
}

/* dest = T0 + T1 + CF. */
static void gen_add_carry(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    tcg_gen_add_i32(dest, t0, t1);
    tcg_gen_add_i32(dest, dest, cpu_CF);
}

/* dest = T0 - T1 + CF - 1.  */
static void gen_sub_carry(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    tcg_gen_sub_i32(dest, t0, t1);
    tcg_gen_add_i32(dest, dest, cpu_CF);
    tcg_gen_subi_i32(dest, dest, 1);
}

/* dest = T0 + T1. Compute C, N, V and Z flags */
static void gen_add_CC(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    tcg_gen_movi_i32(tmp, 0);
    tcg_gen_add2_i32(cpu_NF, cpu_CF, t0, tmp, t1, tmp);
    tcg_gen_mov_i32(cpu_ZF, cpu_NF);
    tcg_gen_xor_i32(cpu_VF, cpu_NF, t0);
    tcg_gen_xor_i32(tmp, t0, t1);
    tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp);
    tcg_gen_mov_i32(dest, cpu_NF);
}

/* dest = T0 + T1 + CF.  Compute C, N, V and Z flags */
static void gen_adc_CC(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    if (TCG_TARGET_HAS_add2_i32) {
        tcg_gen_movi_i32(tmp, 0);
        tcg_gen_add2_i32(cpu_NF, cpu_CF, t0, tmp, cpu_CF, tmp);
        tcg_gen_add2_i32(cpu_NF, cpu_CF, cpu_NF, cpu_CF, t1, tmp);
    } else {
        TCGv_i64 q0 = tcg_temp_new_i64();
        TCGv_i64 q1 = tcg_temp_new_i64();
        tcg_gen_extu_i32_i64(q0, t0);
        tcg_gen_extu_i32_i64(q1, t1);
        tcg_gen_add_i64(q0, q0, q1);
        tcg_gen_extu_i32_i64(q1, cpu_CF);
        tcg_gen_add_i64(q0, q0, q1);
        tcg_gen_extr_i64_i32(cpu_NF, cpu_CF, q0);
    }
    tcg_gen_mov_i32(cpu_ZF, cpu_NF);
    tcg_gen_xor_i32(cpu_VF, cpu_NF, t0);
    tcg_gen_xor_i32(tmp, t0, t1);
    tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp);
    tcg_gen_mov_i32(dest, cpu_NF);
}

/* dest = T0 - T1. Compute C, N, V and Z flags */
static void gen_sub_CC(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp;
    tcg_gen_sub_i32(cpu_NF, t0, t1);
    tcg_gen_mov_i32(cpu_ZF, cpu_NF);
    tcg_gen_setcond_i32(TCG_COND_GEU, cpu_CF, t0, t1);
    tcg_gen_xor_i32(cpu_VF, cpu_NF, t0);
    tmp = tcg_temp_new_i32();
    tcg_gen_xor_i32(tmp, t0, t1);
    tcg_gen_and_i32(cpu_VF, cpu_VF, tmp);
    tcg_gen_mov_i32(dest, cpu_NF);
}

/* dest = T0 + ~T1 + CF.  Compute C, N, V and Z flags */
static void gen_sbc_CC(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    tcg_gen_not_i32(tmp, t1);
    gen_adc_CC(dest, t0, tmp);
}

#define GEN_SHIFT(name)                                               \
static void gen_##name(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)       \
{                                                                     \
    TCGv_i32 tmpd = tcg_temp_new_i32();                               \
    TCGv_i32 tmp1 = tcg_temp_new_i32();                               \
    TCGv_i32 zero = tcg_constant_i32(0);                              \
    tcg_gen_andi_i32(tmp1, t1, 0x1f);                                 \
    tcg_gen_##name##_i32(tmpd, t0, tmp1);                             \
    tcg_gen_andi_i32(tmp1, t1, 0xe0);                                 \
    tcg_gen_movcond_i32(TCG_COND_NE, dest, tmp1, zero, zero, tmpd);   \
}
GEN_SHIFT(shl)
GEN_SHIFT(shr)
#undef GEN_SHIFT

static void gen_sar(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
{
    TCGv_i32 tmp1 = tcg_temp_new_i32();

    tcg_gen_andi_i32(tmp1, t1, 0xff);
    tcg_gen_umin_i32(tmp1, tmp1, tcg_constant_i32(31));
    tcg_gen_sar_i32(dest, t0, tmp1);
}

static void shifter_out_im(TCGv_i32 var, int shift)
{
    tcg_gen_extract_i32(cpu_CF, var, shift, 1);
}

/* Shift by immediate.  Includes special handling for shift == 0.  */
static inline void gen_arm_shift_im(TCGv_i32 var, int shiftop,
                                    int shift, int flags)
{
    switch (shiftop) {
    case 0: /* LSL */
        if (shift != 0) {
            if (flags)
                shifter_out_im(var, 32 - shift);
            tcg_gen_shli_i32(var, var, shift);
        }
        break;
    case 1: /* LSR */
        if (shift == 0) {
            if (flags) {
                tcg_gen_shri_i32(cpu_CF, var, 31);
            }
            tcg_gen_movi_i32(var, 0);
        } else {
            if (flags)
                shifter_out_im(var, shift - 1);
            tcg_gen_shri_i32(var, var, shift);
        }
        break;
    case 2: /* ASR */
        if (shift == 0)
            shift = 32;
        if (flags)
            shifter_out_im(var, shift - 1);
        if (shift == 32)
          shift = 31;
        tcg_gen_sari_i32(var, var, shift);
        break;
    case 3: /* ROR/RRX */
        if (shift != 0) {
            if (flags)
                shifter_out_im(var, shift - 1);
            tcg_gen_rotri_i32(var, var, shift); break;
        } else {
            TCGv_i32 tmp = tcg_temp_new_i32();
            tcg_gen_shli_i32(tmp, cpu_CF, 31);
            if (flags)
                shifter_out_im(var, 0);
            tcg_gen_shri_i32(var, var, 1);
            tcg_gen_or_i32(var, var, tmp);
        }
    }
};

static inline void gen_arm_shift_reg(TCGv_i32 var, int shiftop,
                                     TCGv_i32 shift, int flags)
{
    if (flags) {
        switch (shiftop) {
        case 0: gen_helper_shl_cc(var, cpu_env, var, shift); break;
        case 1: gen_helper_shr_cc(var, cpu_env, var, shift); break;
        case 2: gen_helper_sar_cc(var, cpu_env, var, shift); break;
        case 3: gen_helper_ror_cc(var, cpu_env, var, shift); break;
        }
    } else {
        switch (shiftop) {
        case 0:
            gen_shl(var, var, shift);
            break;
        case 1:
            gen_shr(var, var, shift);
            break;
        case 2:
            gen_sar(var, var, shift);
            break;
        case 3: tcg_gen_andi_i32(shift, shift, 0x1f);
                tcg_gen_rotr_i32(var, var, shift); break;
        }
    }
}

/*
 * Generate a conditional based on ARM condition code cc.
 * This is common between ARM and Aarch64 targets.
 */
void arm_test_cc(DisasCompare *cmp, int cc)
{
    TCGv_i32 value;
    TCGCond cond;

    switch (cc) {
    case 0: /* eq: Z */
    case 1: /* ne: !Z */
        cond = TCG_COND_EQ;
        value = cpu_ZF;
        break;

    case 2: /* cs: C */
    case 3: /* cc: !C */
        cond = TCG_COND_NE;
        value = cpu_CF;
        break;

    case 4: /* mi: N */
    case 5: /* pl: !N */
        cond = TCG_COND_LT;
        value = cpu_NF;
        break;

    case 6: /* vs: V */
    case 7: /* vc: !V */
        cond = TCG_COND_LT;
        value = cpu_VF;
        break;

    case 8: /* hi: C && !Z */
    case 9: /* ls: !C || Z -> !(C && !Z) */
        cond = TCG_COND_NE;
        value = tcg_temp_new_i32();
        /* CF is 1 for C, so -CF is an all-bits-set mask for C;
           ZF is non-zero for !Z; so AND the two subexpressions.  */
        tcg_gen_neg_i32(value, cpu_CF);
        tcg_gen_and_i32(value, value, cpu_ZF);
        break;

    case 10: /* ge: N == V -> N ^ V == 0 */
    case 11: /* lt: N != V -> N ^ V != 0 */
        /* Since we're only interested in the sign bit, == 0 is >= 0.  */
        cond = TCG_COND_GE;
        value = tcg_temp_new_i32();
        tcg_gen_xor_i32(value, cpu_VF, cpu_NF);
        break;

    case 12: /* gt: !Z && N == V */
    case 13: /* le: Z || N != V */
        cond = TCG_COND_NE;
        value = tcg_temp_new_i32();
        /* (N == V) is equal to the sign bit of ~(NF ^ VF).  Propagate
         * the sign bit then AND with ZF to yield the result.  */
        tcg_gen_xor_i32(value, cpu_VF, cpu_NF);
        tcg_gen_sari_i32(value, value, 31);
        tcg_gen_andc_i32(value, cpu_ZF, value);
        break;

    case 14: /* always */
    case 15: /* always */
        /* Use the ALWAYS condition, which will fold early.
         * It doesn't matter what we use for the value.  */
        cond = TCG_COND_ALWAYS;
        value = cpu_ZF;
        goto no_invert;

    default:
        fprintf(stderr, "Bad condition code 0x%x\n", cc);
        abort();
    }

    if (cc & 1) {
        cond = tcg_invert_cond(cond);
    }

 no_invert:
    cmp->cond = cond;
    cmp->value = value;
}

void arm_jump_cc(DisasCompare *cmp, TCGLabel *label)
{
    tcg_gen_brcondi_i32(cmp->cond, cmp->value, 0, label);
}

void arm_gen_test_cc(int cc, TCGLabel *label)
{
    DisasCompare cmp;
    arm_test_cc(&cmp, cc);
    arm_jump_cc(&cmp, label);
}

void gen_set_condexec(DisasContext *s)
{
    if (s->condexec_mask) {
        uint32_t val = (s->condexec_cond << 4) | (s->condexec_mask >> 1);

        store_cpu_field_constant(val, condexec_bits);
    }
}

void gen_update_pc(DisasContext *s, target_long diff)
{
    gen_pc_plus_diff(s, cpu_R[15], diff);
    s->pc_save = s->pc_curr + diff;
}

/* Set PC and Thumb state from var.  var is marked as dead.  */
static inline void gen_bx(DisasContext *s, TCGv_i32 var)
{
    s->base.is_jmp = DISAS_JUMP;
    tcg_gen_andi_i32(cpu_R[15], var, ~1);
    tcg_gen_andi_i32(var, var, 1);
    store_cpu_field(var, thumb);
    s->pc_save = -1;
}

/*
 * Set PC and Thumb state from var. var is marked as dead.
 * For M-profile CPUs, include logic to detect exception-return
 * branches and handle them. This is needed for Thumb POP/LDM to PC, LDR to PC,
 * and BX reg, and no others, and happens only for code in Handler mode.
 * The Security Extension also requires us to check for the FNC_RETURN
 * which signals a function return from non-secure state; this can happen
 * in both Handler and Thread mode.
 * To avoid having to do multiple comparisons in inline generated code,
 * we make the check we do here loose, so it will match for EXC_RETURN
 * in Thread mode. For system emulation do_v7m_exception_exit() checks
 * for these spurious cases and returns without doing anything (giving
 * the same behaviour as for a branch to a non-magic address).
 *
 * In linux-user mode it is unclear what the right behaviour for an
 * attempted FNC_RETURN should be, because in real hardware this will go
 * directly to Secure code (ie not the Linux kernel) which will then treat
 * the error in any way it chooses. For QEMU we opt to make the FNC_RETURN
 * attempt behave the way it would on a CPU without the security extension,
 * which is to say "like a normal branch". That means we can simply treat
 * all branches as normal with no magic address behaviour.
 */
static inline void gen_bx_excret(DisasContext *s, TCGv_i32 var)
{
    /* Generate the same code here as for a simple bx, but flag via
     * s->base.is_jmp that we need to do the rest of the work later.
     */
    gen_bx(s, var);
#ifndef CONFIG_USER_ONLY
    if (arm_dc_feature(s, ARM_FEATURE_M_SECURITY) ||
        (s->v7m_handler_mode && arm_dc_feature(s, ARM_FEATURE_M))) {
        s->base.is_jmp = DISAS_BX_EXCRET;
    }
#endif
}

static inline void gen_bx_excret_final_code(DisasContext *s)
{
    /* Generate the code to finish possible exception return and end the TB */
    DisasLabel excret_label = gen_disas_label(s);
    uint32_t min_magic;

    if (arm_dc_feature(s, ARM_FEATURE_M_SECURITY)) {
        /* Covers FNC_RETURN and EXC_RETURN magic */
        min_magic = FNC_RETURN_MIN_MAGIC;
    } else {
        /* EXC_RETURN magic only */
        min_magic = EXC_RETURN_MIN_MAGIC;
    }

    /* Is the new PC value in the magic range indicating exception return? */
    tcg_gen_brcondi_i32(TCG_COND_GEU, cpu_R[15], min_magic, excret_label.label);
    /* No: end the TB as we would for a DISAS_JMP */
    if (s->ss_active) {
        gen_singlestep_exception(s);
    } else {
        tcg_gen_exit_tb(NULL, 0);
    }
    set_disas_label(s, excret_label);
    /* Yes: this is an exception return.
     * At this point in runtime env->regs[15] and env->thumb will hold
     * the exception-return magic number, which do_v7m_exception_exit()
     * will read. Nothing else will be able to see those values because
     * the cpu-exec main loop guarantees that we will always go straight
     * from raising the exception to the exception-handling code.
     *
     * gen_ss_advance(s) does nothing on M profile currently but
     * calling it is conceptually the right thing as we have executed
     * this instruction (compare SWI, HVC, SMC handling).
     */
    gen_ss_advance(s);
    gen_exception_internal(EXCP_EXCEPTION_EXIT);
}

static inline void gen_bxns(DisasContext *s, int rm)
{
    TCGv_i32 var = load_reg(s, rm);

    /* The bxns helper may raise an EXCEPTION_EXIT exception, so in theory
     * we need to sync state before calling it, but:
     *  - we don't need to do gen_update_pc() because the bxns helper will
     *    always set the PC itself
     *  - we don't need to do gen_set_condexec() because BXNS is UNPREDICTABLE
     *    unless it's outside an IT block or the last insn in an IT block,
     *    so we know that condexec == 0 (already set at the top of the TB)
     *    is correct in the non-UNPREDICTABLE cases, and we can choose
     *    "zeroes the IT bits" as our UNPREDICTABLE behaviour otherwise.
     */
    gen_helper_v7m_bxns(cpu_env, var);
    s->base.is_jmp = DISAS_EXIT;
}

static inline void gen_blxns(DisasContext *s, int rm)
{
    TCGv_i32 var = load_reg(s, rm);

    /* We don't need to sync condexec state, for the same reason as bxns.
     * We do however need to set the PC, because the blxns helper reads it.
     * The blxns helper may throw an exception.
     */
    gen_update_pc(s, curr_insn_len(s));
    gen_helper_v7m_blxns(cpu_env, var);
    s->base.is_jmp = DISAS_EXIT;
}

/* Variant of store_reg which uses branch&exchange logic when storing
   to r15 in ARM architecture v7 and above. The source must be a temporary
   and will be marked as dead. */
static inline void store_reg_bx(DisasContext *s, int reg, TCGv_i32 var)
{
    if (reg == 15 && ENABLE_ARCH_7) {
        gen_bx(s, var);
    } else {
        store_reg(s, reg, var);
    }
}

/* Variant of store_reg which uses branch&exchange logic when storing
 * to r15 in ARM architecture v5T and above. This is used for storing
 * the results of a LDR/LDM/POP into r15, and corresponds to the cases
 * in the ARM ARM which use the LoadWritePC() pseudocode function. */
static inline void store_reg_from_load(DisasContext *s, int reg, TCGv_i32 var)
{
    if (reg == 15 && ENABLE_ARCH_5) {
        gen_bx_excret(s, var);
    } else {
        store_reg(s, reg, var);
    }
}

#ifdef CONFIG_USER_ONLY
#define IS_USER_ONLY 1
#else
#define IS_USER_ONLY 0
#endif

MemOp pow2_align(unsigned i)
{
    static const MemOp mop_align[] = {
        0, MO_ALIGN_2, MO_ALIGN_4, MO_ALIGN_8, MO_ALIGN_16,
        /*
         * FIXME: TARGET_PAGE_BITS_MIN affects TLB_FLAGS_MASK such
         * that 256-bit alignment (MO_ALIGN_32) cannot be supported:
         * see get_alignment_bits(). Enforce only 128-bit alignment for now.
         */
        MO_ALIGN_16
    };
    g_assert(i < ARRAY_SIZE(mop_align));
    return mop_align[i];
}

/*
 * Abstractions of "generate code to do a guest load/store for
 * AArch32", where a vaddr is always 32 bits (and is zero
 * extended if we're a 64 bit core) and  data is also
 * 32 bits unless specifically doing a 64 bit access.
 * These functions work like tcg_gen_qemu_{ld,st}* except
 * that the address argument is TCGv_i32 rather than TCGv.
 */

static TCGv gen_aa32_addr(DisasContext *s, TCGv_i32 a32, MemOp op)
{
    TCGv addr = tcg_temp_new();
    tcg_gen_extu_i32_tl(addr, a32);

    /* Not needed for user-mode BE32, where we use MO_BE instead.  */
    if (!IS_USER_ONLY && s->sctlr_b && (op & MO_SIZE) < MO_32) {
        tcg_gen_xori_tl(addr, addr, 4 - (1 << (op & MO_SIZE)));
    }
    return addr;
}

/*
 * Internal routines are used for NEON cases where the endianness
 * and/or alignment has already been taken into account and manipulated.
 */
void gen_aa32_ld_internal_i32(DisasContext *s, TCGv_i32 val,
                              TCGv_i32 a32, int index, MemOp opc)
{
    TCGv addr = gen_aa32_addr(s, a32, opc);
    tcg_gen_qemu_ld_i32(val, addr, index, opc);
}

void gen_aa32_st_internal_i32(DisasContext *s, TCGv_i32 val,
                              TCGv_i32 a32, int index, MemOp opc)
{
    TCGv addr = gen_aa32_addr(s, a32, opc);
    tcg_gen_qemu_st_i32(val, addr, index, opc);
}

void gen_aa32_ld_internal_i64(DisasContext *s, TCGv_i64 val,
                              TCGv_i32 a32, int index, MemOp opc)
{
    TCGv addr = gen_aa32_addr(s, a32, opc);

    tcg_gen_qemu_ld_i64(val, addr, index, opc);

    /* Not needed for user-mode BE32, where we use MO_BE instead.  */
    if (!IS_USER_ONLY && s->sctlr_b && (opc & MO_SIZE) == MO_64) {
        tcg_gen_rotri_i64(val, val, 32);
    }
}

void gen_aa32_st_internal_i64(DisasContext *s, TCGv_i64 val,
                              TCGv_i32 a32, int index, MemOp opc)
{
    TCGv addr = gen_aa32_addr(s, a32, opc);

    /* Not needed for user-mode BE32, where we use MO_BE instead.  */
    if (!IS_USER_ONLY && s->sctlr_b && (opc & MO_SIZE) == MO_64) {
        TCGv_i64 tmp = tcg_temp_new_i64();
        tcg_gen_rotri_i64(tmp, val, 32);
        tcg_gen_qemu_st_i64(tmp, addr, index, opc);
    } else {
        tcg_gen_qemu_st_i64(val, addr, index, opc);
    }
}

void gen_aa32_ld_i32(DisasContext *s, TCGv_i32 val, TCGv_i32 a32,
                     int index, MemOp opc)
{
    gen_aa32_ld_internal_i32(s, val, a32, index, finalize_memop(s, opc));
}

void gen_aa32_st_i32(DisasContext *s, TCGv_i32 val, TCGv_i32 a32,
                     int index, MemOp opc)
{
    gen_aa32_st_internal_i32(s, val, a32, index, finalize_memop(s, opc));
}

void gen_aa32_ld_i64(DisasContext *s, TCGv_i64 val, TCGv_i32 a32,
                     int index, MemOp opc)
{
    gen_aa32_ld_internal_i64(s, val, a32, index, finalize_memop(s, opc));
}

void gen_aa32_st_i64(DisasContext *s, TCGv_i64 val, TCGv_i32 a32,
                     int index, MemOp opc)
{
    gen_aa32_st_internal_i64(s, val, a32, index, finalize_memop(s, opc));
}

#define DO_GEN_LD(SUFF, OPC)                                            \
    static inline void gen_aa32_ld##SUFF(DisasContext *s, TCGv_i32 val, \
                                         TCGv_i32 a32, int index)       \
    {                                                                   \
        gen_aa32_ld_i32(s, val, a32, index, OPC);                       \
    }

#define DO_GEN_ST(SUFF, OPC)                                            \
    static inline void gen_aa32_st##SUFF(DisasContext *s, TCGv_i32 val, \
                                         TCGv_i32 a32, int index)       \
    {                                                                   \
        gen_aa32_st_i32(s, val, a32, index, OPC);                       \
    }

static inline void gen_hvc(DisasContext *s, int imm16)
{
    /* The pre HVC helper handles cases when HVC gets trapped
     * as an undefined insn by runtime configuration (ie before
     * the insn really executes).
     */
    gen_update_pc(s, 0);
    gen_helper_pre_hvc(cpu_env);
    /* Otherwise we will treat this as a real exception which
     * happens after execution of the insn. (The distinction matters
     * for the PC value reported to the exception handler and also
     * for single stepping.)
     */
    s->svc_imm = imm16;
    gen_update_pc(s, curr_insn_len(s));
    s->base.is_jmp = DISAS_HVC;
}

static inline void gen_smc(DisasContext *s)
{
    /* As with HVC, we may take an exception either before or after
     * the insn executes.
     */
    gen_update_pc(s, 0);
    gen_helper_pre_smc(cpu_env, tcg_constant_i32(syn_aa32_smc()));
    gen_update_pc(s, curr_insn_len(s));
    s->base.is_jmp = DISAS_SMC;
}

static void gen_exception_internal_insn(DisasContext *s, int excp)
{
    gen_set_condexec(s);
    gen_update_pc(s, 0);
    gen_exception_internal(excp);
    s->base.is_jmp = DISAS_NORETURN;
}

static void gen_exception_el_v(int excp, uint32_t syndrome, TCGv_i32 tcg_el)
{
    gen_helper_exception_with_syndrome_el(cpu_env, tcg_constant_i32(excp),
                                          tcg_constant_i32(syndrome), tcg_el);
}

static void gen_exception_el(int excp, uint32_t syndrome, uint32_t target_el)
{
    gen_exception_el_v(excp, syndrome, tcg_constant_i32(target_el));
}

static void gen_exception(int excp, uint32_t syndrome)
{
    gen_helper_exception_with_syndrome(cpu_env, tcg_constant_i32(excp),
                                       tcg_constant_i32(syndrome));
}

static void gen_exception_insn_el_v(DisasContext *s, target_long pc_diff,
                                    int excp, uint32_t syn, TCGv_i32 tcg_el)
{
    if (s->aarch64) {
        gen_a64_update_pc(s, pc_diff);
    } else {
        gen_set_condexec(s);
        gen_update_pc(s, pc_diff);
    }
    gen_exception_el_v(excp, syn, tcg_el);
    s->base.is_jmp = DISAS_NORETURN;
}

void gen_exception_insn_el(DisasContext *s, target_long pc_diff, int excp,
                           uint32_t syn, uint32_t target_el)
{
    gen_exception_insn_el_v(s, pc_diff, excp, syn,
                            tcg_constant_i32(target_el));
}

void gen_exception_insn(DisasContext *s, target_long pc_diff,
                        int excp, uint32_t syn)
{
    if (s->aarch64) {
        gen_a64_update_pc(s, pc_diff);
    } else {
        gen_set_condexec(s);
        gen_update_pc(s, pc_diff);
    }
    gen_exception(excp, syn);
    s->base.is_jmp = DISAS_NORETURN;
}

static void gen_exception_bkpt_insn(DisasContext *s, uint32_t syn)
{
    gen_set_condexec(s);
    gen_update_pc(s, 0);
    gen_helper_exception_bkpt_insn(cpu_env, tcg_constant_i32(syn));
    s->base.is_jmp = DISAS_NORETURN;
}

void unallocated_encoding(DisasContext *s)
{
    /* Unallocated and reserved encodings are uncategorized */
    gen_exception_insn(s, 0, EXCP_UDEF, syn_uncategorized());
}

/* Force a TB lookup after an instruction that changes the CPU state.  */
void gen_lookup_tb(DisasContext *s)
{
    gen_pc_plus_diff(s, cpu_R[15], curr_insn_len(s));
    s->base.is_jmp = DISAS_EXIT;
}

static inline void gen_hlt(DisasContext *s, int imm)
{
    /* HLT. This has two purposes.
     * Architecturally, it is an external halting debug instruction.
     * Since QEMU doesn't implement external debug, we treat this as
     * it is required for halting debug disabled: it will UNDEF.
     * Secondly, "HLT 0x3C" is a T32 semihosting trap instruction,
     * and "HLT 0xF000" is an A32 semihosting syscall. These traps
     * must trigger semihosting even for ARMv7 and earlier, where
     * HLT was an undefined encoding.
     * In system mode, we don't allow userspace access to
     * semihosting, to provide some semblance of security
     * (and for consistency with our 32-bit semihosting).
     */
    if (semihosting_enabled(s->current_el == 0) &&
        (imm == (s->thumb ? 0x3c : 0xf000))) {
        gen_exception_internal_insn(s, EXCP_SEMIHOST);
        return;
    }

    unallocated_encoding(s);
}

/*
 * Return the offset of a "full" NEON Dreg.
 */
long neon_full_reg_offset(unsigned reg)
{
    return offsetof(CPUARMState, vfp.zregs[reg >> 1].d[reg & 1]);
}

/*
 * Return the offset of a 2**SIZE piece of a NEON register, at index ELE,
 * where 0 is the least significant end of the register.
 */
long neon_element_offset(int reg, int element, MemOp memop)
{
    int element_size = 1 << (memop & MO_SIZE);
    int ofs = element * element_size;
#if HOST_BIG_ENDIAN
    /*
     * Calculate the offset assuming fully little-endian,
     * then XOR to account for the order of the 8-byte units.
     */
    if (element_size < 8) {
        ofs ^= 8 - element_size;
    }
#endif
    return neon_full_reg_offset(reg) + ofs;
}

/* Return the offset of a VFP Dreg (dp = true) or VFP Sreg (dp = false). */
long vfp_reg_offset(bool dp, unsigned reg)
{
    if (dp) {
        return neon_element_offset(reg, 0, MO_64);
    } else {
        return neon_element_offset(reg >> 1, reg & 1, MO_32);
    }
}

void read_neon_element32(TCGv_i32 dest, int reg, int ele, MemOp memop)
{
    long off = neon_element_offset(reg, ele, memop);

    switch (memop) {
    case MO_SB:
        tcg_gen_ld8s_i32(dest, cpu_env, off);
        break;
    case MO_UB:
        tcg_gen_ld8u_i32(dest, cpu_env, off);
        break;
    case MO_SW:
        tcg_gen_ld16s_i32(dest, cpu_env, off);
        break;
    case MO_UW:
        tcg_gen_ld16u_i32(dest, cpu_env, off);
        break;
    case MO_UL:
    case MO_SL:
        tcg_gen_ld_i32(dest, cpu_env, off);
        break;
    default:
        g_assert_not_reached();
    }
}

void read_neon_element64(TCGv_i64 dest, int reg, int ele, MemOp memop)
{
    long off = neon_element_offset(reg, ele, memop);

    switch (memop) {
    case MO_SL:
        tcg_gen_ld32s_i64(dest, cpu_env, off);
        break;
    case MO_UL:
        tcg_gen_ld32u_i64(dest, cpu_env, off);
        break;
    case MO_UQ:
        tcg_gen_ld_i64(dest, cpu_env, off);
        break;
    default:
        g_assert_not_reached();
    }
}

void write_neon_element32(TCGv_i32 src, int reg, int ele, MemOp memop)
{
    long off = neon_element_offset(reg, ele, memop);

    switch (memop) {
    case MO_8:
        tcg_gen_st8_i32(src, cpu_env, off);
        break;
    case MO_16:
        tcg_gen_st16_i32(src, cpu_env, off);
        break;
    case MO_32:
        tcg_gen_st_i32(src, cpu_env, off);
        break;
    default:
        g_assert_not_reached();
    }
}

void write_neon_element64(TCGv_i64 src, int reg, int ele, MemOp memop)
{
    long off = neon_element_offset(reg, ele, memop);

    switch (memop) {
    case MO_32:
        tcg_gen_st32_i64(src, cpu_env, off);
        break;
    case MO_64:
        tcg_gen_st_i64(src, cpu_env, off);
        break;
    default:
        g_assert_not_reached();
    }
}

#define ARM_CP_RW_BIT   (1 << 20)

static inline void iwmmxt_load_reg(TCGv_i64 var, int reg)
{
    tcg_gen_ld_i64(var, cpu_env, offsetof(CPUARMState, iwmmxt.regs[reg]));
}

static inline void iwmmxt_store_reg(TCGv_i64 var, int reg)
{
    tcg_gen_st_i64(var, cpu_env, offsetof(CPUARMState, iwmmxt.regs[reg]));
}

static inline TCGv_i32 iwmmxt_load_creg(int reg)
{
    TCGv_i32 var = tcg_temp_new_i32();
    tcg_gen_ld_i32(var, cpu_env, offsetof(CPUARMState, iwmmxt.cregs[reg]));
    return var;
}

static inline void iwmmxt_store_creg(int reg, TCGv_i32 var)
{
    tcg_gen_st_i32(var, cpu_env, offsetof(CPUARMState, iwmmxt.cregs[reg]));
}

static inline void gen_op_iwmmxt_movq_wRn_M0(int rn)
{
    iwmmxt_store_reg(cpu_M0, rn);
}

static inline void gen_op_iwmmxt_movq_M0_wRn(int rn)
{
    iwmmxt_load_reg(cpu_M0, rn);
}

static inline void gen_op_iwmmxt_orq_M0_wRn(int rn)
{
    iwmmxt_load_reg(cpu_V1, rn);
    tcg_gen_or_i64(cpu_M0, cpu_M0, cpu_V1);
}

static inline void gen_op_iwmmxt_andq_M0_wRn(int rn)
{
    iwmmxt_load_reg(cpu_V1, rn);
    tcg_gen_and_i64(cpu_M0, cpu_M0, cpu_V1);
}

static inline void gen_op_iwmmxt_xorq_M0_wRn(int rn)
{
    iwmmxt_load_reg(cpu_V1, rn);
    tcg_gen_xor_i64(cpu_M0, cpu_M0, cpu_V1);
}

#define IWMMXT_OP(name) \
static inline void gen_op_iwmmxt_##name##_M0_wRn(int rn) \
{ \
    iwmmxt_load_reg(cpu_V1, rn); \
    gen_helper_iwmmxt_##name(cpu_M0, cpu_M0, cpu_V1); \
}

#define IWMMXT_OP_ENV(name) \
static inline void gen_op_iwmmxt_##name##_M0_wRn(int rn) \
{ \
    iwmmxt_load_reg(cpu_V1, rn); \
    gen_helper_iwmmxt_##name(cpu_M0, cpu_env, cpu_M0, cpu_V1); \
}

#define IWMMXT_OP_ENV_SIZE(name) \
IWMMXT_OP_ENV(name##b) \
IWMMXT_OP_ENV(name##w) \
IWMMXT_OP_ENV(name##l)

#define IWMMXT_OP_ENV1(name) \
static inline void gen_op_iwmmxt_##name##_M0(void) \
{ \
    gen_helper_iwmmxt_##name(cpu_M0, cpu_env, cpu_M0); \
}

IWMMXT_OP(maddsq)
IWMMXT_OP(madduq)
IWMMXT_OP(sadb)
IWMMXT_OP(sadw)
IWMMXT_OP(mulslw)
IWMMXT_OP(mulshw)
IWMMXT_OP(mululw)
IWMMXT_OP(muluhw)
IWMMXT_OP(macsw)
IWMMXT_OP(macuw)

IWMMXT_OP_ENV_SIZE(unpackl)
IWMMXT_OP_ENV_SIZE(unpackh)

IWMMXT_OP_ENV1(unpacklub)
IWMMXT_OP_ENV1(unpackluw)
IWMMXT_OP_ENV1(unpacklul)
IWMMXT_OP_ENV1(unpackhub)
IWMMXT_OP_ENV1(unpackhuw)
IWMMXT_OP_ENV1(unpackhul)
IWMMXT_OP_ENV1(unpacklsb)
IWMMXT_OP_ENV1(unpacklsw)
IWMMXT_OP_ENV1(unpacklsl)
IWMMXT_OP_ENV1(unpackhsb)
IWMMXT_OP_ENV1(unpackhsw)
IWMMXT_OP_ENV1(unpackhsl)

IWMMXT_OP_ENV_SIZE(cmpeq)
IWMMXT_OP_ENV_SIZE(cmpgtu)
IWMMXT_OP_ENV_SIZE(cmpgts)

IWMMXT_OP_ENV_SIZE(mins)
IWMMXT_OP_ENV_SIZE(minu)
IWMMXT_OP_ENV_SIZE(maxs)
IWMMXT_OP_ENV_SIZE(maxu)

IWMMXT_OP_ENV_SIZE(subn)
IWMMXT_OP_ENV_SIZE(addn)
IWMMXT_OP_ENV_SIZE(subu)
IWMMXT_OP_ENV_SIZE(addu)
IWMMXT_OP_ENV_SIZE(subs)
IWMMXT_OP_ENV_SIZE(adds)

IWMMXT_OP_ENV(avgb0)
IWMMXT_OP_ENV(avgb1)
IWMMXT_OP_ENV(avgw0)
IWMMXT_OP_ENV(avgw1)

IWMMXT_OP_ENV(packuw)
IWMMXT_OP_ENV(packul)
IWMMXT_OP_ENV(packuq)
IWMMXT_OP_ENV(packsw)
IWMMXT_OP_ENV(packsl)
IWMMXT_OP_ENV(packsq)

static void gen_op_iwmmxt_set_mup(void)
{
    TCGv_i32 tmp;
    tmp = load_cpu_field(iwmmxt.cregs[ARM_IWMMXT_wCon]);
    tcg_gen_ori_i32(tmp, tmp, 2);
    store_cpu_field(tmp, iwmmxt.cregs[ARM_IWMMXT_wCon]);
}

static void gen_op_iwmmxt_set_cup(void)
{
    TCGv_i32 tmp;
    tmp = load_cpu_field(iwmmxt.cregs[ARM_IWMMXT_wCon]);
    tcg_gen_ori_i32(tmp, tmp, 1);
    store_cpu_field(tmp, iwmmxt.cregs[ARM_IWMMXT_wCon]);
}

static void gen_op_iwmmxt_setpsr_nz(void)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    gen_helper_iwmmxt_setpsr_nz(tmp, cpu_M0);
    store_cpu_field(tmp, iwmmxt.cregs[ARM_IWMMXT_wCASF]);
}

static inline void gen_op_iwmmxt_addl_M0_wRn(int rn)
{
    iwmmxt_load_reg(cpu_V1, rn);
    tcg_gen_ext32u_i64(cpu_V1, cpu_V1);
    tcg_gen_add_i64(cpu_M0, cpu_M0, cpu_V1);
}

static inline int gen_iwmmxt_address(DisasContext *s, uint32_t insn,
                                     TCGv_i32 dest)
{
    int rd;
    uint32_t offset;
    TCGv_i32 tmp;

    rd = (insn >> 16) & 0xf;
    tmp = load_reg(s, rd);

    offset = (insn & 0xff) << ((insn >> 7) & 2);
    if (insn & (1 << 24)) {
        /* Pre indexed */
        if (insn & (1 << 23))
            tcg_gen_addi_i32(tmp, tmp, offset);
        else
            tcg_gen_addi_i32(tmp, tmp, -offset);
        tcg_gen_mov_i32(dest, tmp);
        if (insn & (1 << 21)) {
            store_reg(s, rd, tmp);
        }
    } else if (insn & (1 << 21)) {
        /* Post indexed */
        tcg_gen_mov_i32(dest, tmp);
        if (insn & (1 << 23))
            tcg_gen_addi_i32(tmp, tmp, offset);
        else
            tcg_gen_addi_i32(tmp, tmp, -offset);
        store_reg(s, rd, tmp);
    } else if (!(insn & (1 << 23)))
        return 1;
    return 0;
}

static inline int gen_iwmmxt_shift(uint32_t insn, uint32_t mask, TCGv_i32 dest)
{
    int rd = (insn >> 0) & 0xf;
    TCGv_i32 tmp;

    if (insn & (1 << 8)) {
        if (rd < ARM_IWMMXT_wCGR0 || rd > ARM_IWMMXT_wCGR3) {
            return 1;
        } else {
            tmp = iwmmxt_load_creg(rd);
        }
    } else {
        tmp = tcg_temp_new_i32();
        iwmmxt_load_reg(cpu_V0, rd);
        tcg_gen_extrl_i64_i32(tmp, cpu_V0);
    }
    tcg_gen_andi_i32(tmp, tmp, mask);
    tcg_gen_mov_i32(dest, tmp);
    return 0;
}

/* Disassemble an iwMMXt instruction.  Returns nonzero if an error occurred
   (ie. an undefined instruction).  */
static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
{
    int rd, wrd;
    int rdhi, rdlo, rd0, rd1, i;
    TCGv_i32 addr;
    TCGv_i32 tmp, tmp2, tmp3;

    if ((insn & 0x0e000e00) == 0x0c000000) {
        if ((insn & 0x0fe00ff0) == 0x0c400000) {
            wrd = insn & 0xf;
            rdlo = (insn >> 12) & 0xf;
            rdhi = (insn >> 16) & 0xf;
            if (insn & ARM_CP_RW_BIT) {                         /* TMRRC */
                iwmmxt_load_reg(cpu_V0, wrd);
                tcg_gen_extrl_i64_i32(cpu_R[rdlo], cpu_V0);
                tcg_gen_extrh_i64_i32(cpu_R[rdhi], cpu_V0);
            } else {                                    /* TMCRR */
                tcg_gen_concat_i32_i64(cpu_V0, cpu_R[rdlo], cpu_R[rdhi]);
                iwmmxt_store_reg(cpu_V0, wrd);
                gen_op_iwmmxt_set_mup();
            }
            return 0;
        }

        wrd = (insn >> 12) & 0xf;
        addr = tcg_temp_new_i32();
        if (gen_iwmmxt_address(s, insn, addr)) {
            return 1;
        }
        if (insn & ARM_CP_RW_BIT) {
            if ((insn >> 28) == 0xf) {                  /* WLDRW wCx */
                tmp = tcg_temp_new_i32();
                gen_aa32_ld32u(s, tmp, addr, get_mem_index(s));
                iwmmxt_store_creg(wrd, tmp);
            } else {
                i = 1;
                if (insn & (1 << 8)) {
                    if (insn & (1 << 22)) {             /* WLDRD */
                        gen_aa32_ld64(s, cpu_M0, addr, get_mem_index(s));
                        i = 0;
                    } else {                            /* WLDRW wRd */
                        tmp = tcg_temp_new_i32();
                        gen_aa32_ld32u(s, tmp, addr, get_mem_index(s));
                    }
                } else {
                    tmp = tcg_temp_new_i32();
                    if (insn & (1 << 22)) {             /* WLDRH */
                        gen_aa32_ld16u(s, tmp, addr, get_mem_index(s));
                    } else {                            /* WLDRB */
                        gen_aa32_ld8u(s, tmp, addr, get_mem_index(s));
                    }
                }
                if (i) {
                    tcg_gen_extu_i32_i64(cpu_M0, tmp);
                }
                gen_op_iwmmxt_movq_wRn_M0(wrd);
            }
        } else {
            if ((insn >> 28) == 0xf) {                  /* WSTRW wCx */
                tmp = iwmmxt_load_creg(wrd);
                gen_aa32_st32(s, tmp, addr, get_mem_index(s));
            } else {
                gen_op_iwmmxt_movq_M0_wRn(wrd);
                tmp = tcg_temp_new_i32();
                if (insn & (1 << 8)) {
                    if (insn & (1 << 22)) {             /* WSTRD */
                        gen_aa32_st64(s, cpu_M0, addr, get_mem_index(s));
                    } else {                            /* WSTRW wRd */
                        tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                        gen_aa32_st32(s, tmp, addr, get_mem_index(s));
                    }
                } else {
                    if (insn & (1 << 22)) {             /* WSTRH */
                        tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                        gen_aa32_st16(s, tmp, addr, get_mem_index(s));
                    } else {                            /* WSTRB */
                        tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                        gen_aa32_st8(s, tmp, addr, get_mem_index(s));
                    }
                }
            }
        }
        return 0;
    }

    if ((insn & 0x0f000000) != 0x0e000000)
        return 1;

    switch (((insn >> 12) & 0xf00) | ((insn >> 4) & 0xff)) {
    case 0x000:                                                 /* WOR */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 0) & 0xf;
        rd1 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        gen_op_iwmmxt_orq_M0_wRn(rd1);
        gen_op_iwmmxt_setpsr_nz();
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x011:                                                 /* TMCR */
        if (insn & 0xf)
            return 1;
        rd = (insn >> 12) & 0xf;
        wrd = (insn >> 16) & 0xf;
        switch (wrd) {
        case ARM_IWMMXT_wCID:
        case ARM_IWMMXT_wCASF:
            break;
        case ARM_IWMMXT_wCon:
            gen_op_iwmmxt_set_cup();
            /* Fall through.  */
        case ARM_IWMMXT_wCSSF:
            tmp = iwmmxt_load_creg(wrd);
            tmp2 = load_reg(s, rd);
            tcg_gen_andc_i32(tmp, tmp, tmp2);
            iwmmxt_store_creg(wrd, tmp);
            break;
        case ARM_IWMMXT_wCGR0:
        case ARM_IWMMXT_wCGR1:
        case ARM_IWMMXT_wCGR2:
        case ARM_IWMMXT_wCGR3:
            gen_op_iwmmxt_set_cup();
            tmp = load_reg(s, rd);
            iwmmxt_store_creg(wrd, tmp);
            break;
        default:
            return 1;
        }
        break;
    case 0x100:                                                 /* WXOR */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 0) & 0xf;
        rd1 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        gen_op_iwmmxt_xorq_M0_wRn(rd1);
        gen_op_iwmmxt_setpsr_nz();
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x111:                                                 /* TMRC */
        if (insn & 0xf)
            return 1;
        rd = (insn >> 12) & 0xf;
        wrd = (insn >> 16) & 0xf;
        tmp = iwmmxt_load_creg(wrd);
        store_reg(s, rd, tmp);
        break;
    case 0x300:                                                 /* WANDN */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 0) & 0xf;
        rd1 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tcg_gen_neg_i64(cpu_M0, cpu_M0);
        gen_op_iwmmxt_andq_M0_wRn(rd1);
        gen_op_iwmmxt_setpsr_nz();
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x200:                                                 /* WAND */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 0) & 0xf;
        rd1 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        gen_op_iwmmxt_andq_M0_wRn(rd1);
        gen_op_iwmmxt_setpsr_nz();
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x810: case 0xa10:                             /* WMADD */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 0) & 0xf;
        rd1 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        if (insn & (1 << 21))
            gen_op_iwmmxt_maddsq_M0_wRn(rd1);
        else
            gen_op_iwmmxt_madduq_M0_wRn(rd1);
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x10e: case 0x50e: case 0x90e: case 0xd0e:     /* WUNPCKIL */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            gen_op_iwmmxt_unpacklb_M0_wRn(rd1);
            break;
        case 1:
            gen_op_iwmmxt_unpacklw_M0_wRn(rd1);
            break;
        case 2:
            gen_op_iwmmxt_unpackll_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x10c: case 0x50c: case 0x90c: case 0xd0c:     /* WUNPCKIH */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            gen_op_iwmmxt_unpackhb_M0_wRn(rd1);
            break;
        case 1:
            gen_op_iwmmxt_unpackhw_M0_wRn(rd1);
            break;
        case 2:
            gen_op_iwmmxt_unpackhl_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x012: case 0x112: case 0x412: case 0x512:     /* WSAD */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        if (insn & (1 << 22))
            gen_op_iwmmxt_sadw_M0_wRn(rd1);
        else
            gen_op_iwmmxt_sadb_M0_wRn(rd1);
        if (!(insn & (1 << 20)))
            gen_op_iwmmxt_addl_M0_wRn(wrd);
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x010: case 0x110: case 0x210: case 0x310:     /* WMUL */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        if (insn & (1 << 21)) {
            if (insn & (1 << 20))
                gen_op_iwmmxt_mulshw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_mulslw_M0_wRn(rd1);
        } else {
            if (insn & (1 << 20))
                gen_op_iwmmxt_muluhw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_mululw_M0_wRn(rd1);
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x410: case 0x510: case 0x610: case 0x710:     /* WMAC */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        if (insn & (1 << 21))
            gen_op_iwmmxt_macsw_M0_wRn(rd1);
        else
            gen_op_iwmmxt_macuw_M0_wRn(rd1);
        if (!(insn & (1 << 20))) {
            iwmmxt_load_reg(cpu_V1, wrd);
            tcg_gen_add_i64(cpu_M0, cpu_M0, cpu_V1);
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x006: case 0x406: case 0x806: case 0xc06:     /* WCMPEQ */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            gen_op_iwmmxt_cmpeqb_M0_wRn(rd1);
            break;
        case 1:
            gen_op_iwmmxt_cmpeqw_M0_wRn(rd1);
            break;
        case 2:
            gen_op_iwmmxt_cmpeql_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x800: case 0x900: case 0xc00: case 0xd00:     /* WAVG2 */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        if (insn & (1 << 22)) {
            if (insn & (1 << 20))
                gen_op_iwmmxt_avgw1_M0_wRn(rd1);
            else
                gen_op_iwmmxt_avgw0_M0_wRn(rd1);
        } else {
            if (insn & (1 << 20))
                gen_op_iwmmxt_avgb1_M0_wRn(rd1);
            else
                gen_op_iwmmxt_avgb0_M0_wRn(rd1);
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x802: case 0x902: case 0xa02: case 0xb02:     /* WALIGNR */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = iwmmxt_load_creg(ARM_IWMMXT_wCGR0 + ((insn >> 20) & 3));
        tcg_gen_andi_i32(tmp, tmp, 7);
        iwmmxt_load_reg(cpu_V1, rd1);
        gen_helper_iwmmxt_align(cpu_M0, cpu_M0, cpu_V1, tmp);
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x601: case 0x605: case 0x609: case 0x60d:     /* TINSR */
        if (((insn >> 6) & 3) == 3)
            return 1;
        rd = (insn >> 12) & 0xf;
        wrd = (insn >> 16) & 0xf;
        tmp = load_reg(s, rd);
        gen_op_iwmmxt_movq_M0_wRn(wrd);
        switch ((insn >> 6) & 3) {
        case 0:
            tmp2 = tcg_constant_i32(0xff);
            tmp3 = tcg_constant_i32((insn & 7) << 3);
            break;
        case 1:
            tmp2 = tcg_constant_i32(0xffff);
            tmp3 = tcg_constant_i32((insn & 3) << 4);
            break;
        case 2:
            tmp2 = tcg_constant_i32(0xffffffff);
            tmp3 = tcg_constant_i32((insn & 1) << 5);
            break;
        default:
            g_assert_not_reached();
        }
        gen_helper_iwmmxt_insr(cpu_M0, cpu_M0, tmp, tmp2, tmp3);
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x107: case 0x507: case 0x907: case 0xd07:     /* TEXTRM */
        rd = (insn >> 12) & 0xf;
        wrd = (insn >> 16) & 0xf;
        if (rd == 15 || ((insn >> 22) & 3) == 3)
            return 1;
        gen_op_iwmmxt_movq_M0_wRn(wrd);
        tmp = tcg_temp_new_i32();
        switch ((insn >> 22) & 3) {
        case 0:
            tcg_gen_shri_i64(cpu_M0, cpu_M0, (insn & 7) << 3);
            tcg_gen_extrl_i64_i32(tmp, cpu_M0);
            if (insn & 8) {
                tcg_gen_ext8s_i32(tmp, tmp);
            } else {
                tcg_gen_andi_i32(tmp, tmp, 0xff);
            }
            break;
        case 1:
            tcg_gen_shri_i64(cpu_M0, cpu_M0, (insn & 3) << 4);
            tcg_gen_extrl_i64_i32(tmp, cpu_M0);
            if (insn & 8) {
                tcg_gen_ext16s_i32(tmp, tmp);
            } else {
                tcg_gen_andi_i32(tmp, tmp, 0xffff);
            }
            break;
        case 2:
            tcg_gen_shri_i64(cpu_M0, cpu_M0, (insn & 1) << 5);
            tcg_gen_extrl_i64_i32(tmp, cpu_M0);
            break;
        }
        store_reg(s, rd, tmp);
        break;
    case 0x117: case 0x517: case 0x917: case 0xd17:     /* TEXTRC */
        if ((insn & 0x000ff008) != 0x0003f000 || ((insn >> 22) & 3) == 3)
            return 1;
        tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
        switch ((insn >> 22) & 3) {
        case 0:
            tcg_gen_shri_i32(tmp, tmp, ((insn & 7) << 2) + 0);
            break;
        case 1:
            tcg_gen_shri_i32(tmp, tmp, ((insn & 3) << 3) + 4);
            break;
        case 2:
            tcg_gen_shri_i32(tmp, tmp, ((insn & 1) << 4) + 12);
            break;
        }
        tcg_gen_shli_i32(tmp, tmp, 28);
        gen_set_nzcv(tmp);
        break;
    case 0x401: case 0x405: case 0x409: case 0x40d:     /* TBCST */
        if (((insn >> 6) & 3) == 3)
            return 1;
        rd = (insn >> 12) & 0xf;
        wrd = (insn >> 16) & 0xf;
        tmp = load_reg(s, rd);
        switch ((insn >> 6) & 3) {
        case 0:
            gen_helper_iwmmxt_bcstb(cpu_M0, tmp);
            break;
        case 1:
            gen_helper_iwmmxt_bcstw(cpu_M0, tmp);
            break;
        case 2:
            gen_helper_iwmmxt_bcstl(cpu_M0, tmp);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x113: case 0x513: case 0x913: case 0xd13:     /* TANDC */
        if ((insn & 0x000ff00f) != 0x0003f000 || ((insn >> 22) & 3) == 3)
            return 1;
        tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
        tmp2 = tcg_temp_new_i32();
        tcg_gen_mov_i32(tmp2, tmp);
        switch ((insn >> 22) & 3) {
        case 0:
            for (i = 0; i < 7; i ++) {
                tcg_gen_shli_i32(tmp2, tmp2, 4);
                tcg_gen_and_i32(tmp, tmp, tmp2);
            }
            break;
        case 1:
            for (i = 0; i < 3; i ++) {
                tcg_gen_shli_i32(tmp2, tmp2, 8);
                tcg_gen_and_i32(tmp, tmp, tmp2);
            }
            break;
        case 2:
            tcg_gen_shli_i32(tmp2, tmp2, 16);
            tcg_gen_and_i32(tmp, tmp, tmp2);
            break;
        }
        gen_set_nzcv(tmp);
        break;
    case 0x01c: case 0x41c: case 0x81c: case 0xc1c:     /* WACC */
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            gen_helper_iwmmxt_addcb(cpu_M0, cpu_M0);
            break;
        case 1:
            gen_helper_iwmmxt_addcw(cpu_M0, cpu_M0);
            break;
        case 2:
            gen_helper_iwmmxt_addcl(cpu_M0, cpu_M0);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x115: case 0x515: case 0x915: case 0xd15:     /* TORC */
        if ((insn & 0x000ff00f) != 0x0003f000 || ((insn >> 22) & 3) == 3)
            return 1;
        tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
        tmp2 = tcg_temp_new_i32();
        tcg_gen_mov_i32(tmp2, tmp);
        switch ((insn >> 22) & 3) {
        case 0:
            for (i = 0; i < 7; i ++) {
                tcg_gen_shli_i32(tmp2, tmp2, 4);
                tcg_gen_or_i32(tmp, tmp, tmp2);
            }
            break;
        case 1:
            for (i = 0; i < 3; i ++) {
                tcg_gen_shli_i32(tmp2, tmp2, 8);
                tcg_gen_or_i32(tmp, tmp, tmp2);
            }
            break;
        case 2:
            tcg_gen_shli_i32(tmp2, tmp2, 16);
            tcg_gen_or_i32(tmp, tmp, tmp2);
            break;
        }
        gen_set_nzcv(tmp);
        break;
    case 0x103: case 0x503: case 0x903: case 0xd03:     /* TMOVMSK */
        rd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        if ((insn & 0xf) != 0 || ((insn >> 22) & 3) == 3)

            return 1;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_temp_new_i32();
        switch ((insn >> 22) & 3) {
        case 0:
            gen_helper_iwmmxt_msbb(tmp, cpu_M0);
            break;
        case 1:
            gen_helper_iwmmxt_msbw(tmp, cpu_M0);
            break;
        case 2:
            gen_helper_iwmmxt_msbl(tmp, cpu_M0);
            break;
        }
        store_reg(s, rd, tmp);
        break;
    case 0x106: case 0x306: case 0x506: case 0x706:     /* WCMPGT */
    case 0x906: case 0xb06: case 0xd06: case 0xf06:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            if (insn & (1 << 21))
                gen_op_iwmmxt_cmpgtsb_M0_wRn(rd1);
            else
                gen_op_iwmmxt_cmpgtub_M0_wRn(rd1);
            break;
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_cmpgtsw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_cmpgtuw_M0_wRn(rd1);
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_cmpgtsl_M0_wRn(rd1);
            else
                gen_op_iwmmxt_cmpgtul_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x00e: case 0x20e: case 0x40e: case 0x60e:     /* WUNPCKEL */
    case 0x80e: case 0xa0e: case 0xc0e: case 0xe0e:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpacklsb_M0();
            else
                gen_op_iwmmxt_unpacklub_M0();
            break;
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpacklsw_M0();
            else
                gen_op_iwmmxt_unpackluw_M0();
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpacklsl_M0();
            else
                gen_op_iwmmxt_unpacklul_M0();
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x00c: case 0x20c: case 0x40c: case 0x60c:     /* WUNPCKEH */
    case 0x80c: case 0xa0c: case 0xc0c: case 0xe0c:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpackhsb_M0();
            else
                gen_op_iwmmxt_unpackhub_M0();
            break;
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpackhsw_M0();
            else
                gen_op_iwmmxt_unpackhuw_M0();
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_unpackhsl_M0();
            else
                gen_op_iwmmxt_unpackhul_M0();
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x204: case 0x604: case 0xa04: case 0xe04:     /* WSRL */
    case 0x214: case 0x614: case 0xa14: case 0xe14:
        if (((insn >> 22) & 3) == 0)
            return 1;
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_temp_new_i32();
        if (gen_iwmmxt_shift(insn, 0xff, tmp)) {
            return 1;
        }
        switch ((insn >> 22) & 3) {
        case 1:
            gen_helper_iwmmxt_srlw(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 2:
            gen_helper_iwmmxt_srll(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 3:
            gen_helper_iwmmxt_srlq(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x004: case 0x404: case 0x804: case 0xc04:     /* WSRA */
    case 0x014: case 0x414: case 0x814: case 0xc14:
        if (((insn >> 22) & 3) == 0)
            return 1;
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_temp_new_i32();
        if (gen_iwmmxt_shift(insn, 0xff, tmp)) {
            return 1;
        }
        switch ((insn >> 22) & 3) {
        case 1:
            gen_helper_iwmmxt_sraw(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 2:
            gen_helper_iwmmxt_sral(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 3:
            gen_helper_iwmmxt_sraq(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x104: case 0x504: case 0x904: case 0xd04:     /* WSLL */
    case 0x114: case 0x514: case 0x914: case 0xd14:
        if (((insn >> 22) & 3) == 0)
            return 1;
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_temp_new_i32();
        if (gen_iwmmxt_shift(insn, 0xff, tmp)) {
            return 1;
        }
        switch ((insn >> 22) & 3) {
        case 1:
            gen_helper_iwmmxt_sllw(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 2:
            gen_helper_iwmmxt_slll(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 3:
            gen_helper_iwmmxt_sllq(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x304: case 0x704: case 0xb04: case 0xf04:     /* WROR */
    case 0x314: case 0x714: case 0xb14: case 0xf14:
        if (((insn >> 22) & 3) == 0)
            return 1;
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_temp_new_i32();
        switch ((insn >> 22) & 3) {
        case 1:
            if (gen_iwmmxt_shift(insn, 0xf, tmp)) {
                return 1;
            }
            gen_helper_iwmmxt_rorw(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 2:
            if (gen_iwmmxt_shift(insn, 0x1f, tmp)) {
                return 1;
            }
            gen_helper_iwmmxt_rorl(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        case 3:
            if (gen_iwmmxt_shift(insn, 0x3f, tmp)) {
                return 1;
            }
            gen_helper_iwmmxt_rorq(cpu_M0, cpu_env, cpu_M0, tmp);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x116: case 0x316: case 0x516: case 0x716:     /* WMIN */
    case 0x916: case 0xb16: case 0xd16: case 0xf16:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            if (insn & (1 << 21))
                gen_op_iwmmxt_minsb_M0_wRn(rd1);
            else
                gen_op_iwmmxt_minub_M0_wRn(rd1);
            break;
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_minsw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_minuw_M0_wRn(rd1);
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_minsl_M0_wRn(rd1);
            else
                gen_op_iwmmxt_minul_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x016: case 0x216: case 0x416: case 0x616:     /* WMAX */
    case 0x816: case 0xa16: case 0xc16: case 0xe16:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 0:
            if (insn & (1 << 21))
                gen_op_iwmmxt_maxsb_M0_wRn(rd1);
            else
                gen_op_iwmmxt_maxub_M0_wRn(rd1);
            break;
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_maxsw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_maxuw_M0_wRn(rd1);
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_maxsl_M0_wRn(rd1);
            else
                gen_op_iwmmxt_maxul_M0_wRn(rd1);
            break;
        case 3:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x002: case 0x102: case 0x202: case 0x302:     /* WALIGNI */
    case 0x402: case 0x502: case 0x602: case 0x702:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        iwmmxt_load_reg(cpu_V1, rd1);
        gen_helper_iwmmxt_align(cpu_M0, cpu_M0, cpu_V1,
                                tcg_constant_i32((insn >> 20) & 3));
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    case 0x01a: case 0x11a: case 0x21a: case 0x31a:     /* WSUB */
    case 0x41a: case 0x51a: case 0x61a: case 0x71a:
    case 0x81a: case 0x91a: case 0xa1a: case 0xb1a:
    case 0xc1a: case 0xd1a: case 0xe1a: case 0xf1a:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 20) & 0xf) {
        case 0x0:
            gen_op_iwmmxt_subnb_M0_wRn(rd1);
            break;
        case 0x1:
            gen_op_iwmmxt_subub_M0_wRn(rd1);
            break;
        case 0x3:
            gen_op_iwmmxt_subsb_M0_wRn(rd1);
            break;
        case 0x4:
            gen_op_iwmmxt_subnw_M0_wRn(rd1);
            break;
        case 0x5:
            gen_op_iwmmxt_subuw_M0_wRn(rd1);
            break;
        case 0x7:
            gen_op_iwmmxt_subsw_M0_wRn(rd1);
            break;
        case 0x8:
            gen_op_iwmmxt_subnl_M0_wRn(rd1);
            break;
        case 0x9:
            gen_op_iwmmxt_subul_M0_wRn(rd1);
            break;
        case 0xb:
            gen_op_iwmmxt_subsl_M0_wRn(rd1);
            break;
        default:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x01e: case 0x11e: case 0x21e: case 0x31e:     /* WSHUFH */
    case 0x41e: case 0x51e: case 0x61e: case 0x71e:
    case 0x81e: case 0x91e: case 0xa1e: case 0xb1e:
    case 0xc1e: case 0xd1e: case 0xe1e: case 0xf1e:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        tmp = tcg_constant_i32(((insn >> 16) & 0xf0) | (insn & 0x0f));
        gen_helper_iwmmxt_shufh(cpu_M0, cpu_env, cpu_M0, tmp);
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x018: case 0x118: case 0x218: case 0x318:     /* WADD */
    case 0x418: case 0x518: case 0x618: case 0x718:
    case 0x818: case 0x918: case 0xa18: case 0xb18:
    case 0xc18: case 0xd18: case 0xe18: case 0xf18:
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 20) & 0xf) {
        case 0x0:
            gen_op_iwmmxt_addnb_M0_wRn(rd1);
            break;
        case 0x1:
            gen_op_iwmmxt_addub_M0_wRn(rd1);
            break;
        case 0x3:
            gen_op_iwmmxt_addsb_M0_wRn(rd1);
            break;
        case 0x4:
            gen_op_iwmmxt_addnw_M0_wRn(rd1);
            break;
        case 0x5:
            gen_op_iwmmxt_adduw_M0_wRn(rd1);
            break;
        case 0x7:
            gen_op_iwmmxt_addsw_M0_wRn(rd1);
            break;
        case 0x8:
            gen_op_iwmmxt_addnl_M0_wRn(rd1);
            break;
        case 0x9:
            gen_op_iwmmxt_addul_M0_wRn(rd1);
            break;
        case 0xb:
            gen_op_iwmmxt_addsl_M0_wRn(rd1);
            break;
        default:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x008: case 0x108: case 0x208: case 0x308:     /* WPACK */
    case 0x408: case 0x508: case 0x608: case 0x708:
    case 0x808: case 0x908: case 0xa08: case 0xb08:
    case 0xc08: case 0xd08: case 0xe08: case 0xf08:
        if (!(insn & (1 << 20)) || ((insn >> 22) & 3) == 0)
            return 1;
        wrd = (insn >> 12) & 0xf;
        rd0 = (insn >> 16) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        gen_op_iwmmxt_movq_M0_wRn(rd0);
        switch ((insn >> 22) & 3) {
        case 1:
            if (insn & (1 << 21))
                gen_op_iwmmxt_packsw_M0_wRn(rd1);
            else
                gen_op_iwmmxt_packuw_M0_wRn(rd1);
            break;
        case 2:
            if (insn & (1 << 21))
                gen_op_iwmmxt_packsl_M0_wRn(rd1);
            else
                gen_op_iwmmxt_packul_M0_wRn(rd1);
            break;
        case 3:
            if (insn & (1 << 21))
                gen_op_iwmmxt_packsq_M0_wRn(rd1);
            else
                gen_op_iwmmxt_packuq_M0_wRn(rd1);
            break;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        gen_op_iwmmxt_set_cup();
        break;
    case 0x201: case 0x203: case 0x205: case 0x207:
    case 0x209: case 0x20b: case 0x20d: case 0x20f:
    case 0x211: case 0x213: case 0x215: case 0x217:
    case 0x219: case 0x21b: case 0x21d: case 0x21f:
        wrd = (insn >> 5) & 0xf;
        rd0 = (insn >> 12) & 0xf;
        rd1 = (insn >> 0) & 0xf;
        if (rd0 == 0xf || rd1 == 0xf)
            return 1;
        gen_op_iwmmxt_movq_M0_wRn(wrd);
        tmp = load_reg(s, rd0);
        tmp2 = load_reg(s, rd1);
        switch ((insn >> 16) & 0xf) {
        case 0x0:                                       /* TMIA */
            gen_helper_iwmmxt_muladdsl(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        case 0x8:                                       /* TMIAPH */
            gen_helper_iwmmxt_muladdsw(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        case 0xc: case 0xd: case 0xe: case 0xf:                 /* TMIAxy */
            if (insn & (1 << 16))
                tcg_gen_shri_i32(tmp, tmp, 16);
            if (insn & (1 << 17))
                tcg_gen_shri_i32(tmp2, tmp2, 16);
            gen_helper_iwmmxt_muladdswl(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        default:
            return 1;
        }
        gen_op_iwmmxt_movq_wRn_M0(wrd);
        gen_op_iwmmxt_set_mup();
        break;
    default:
        return 1;
    }

    return 0;
}

/* Disassemble an XScale DSP instruction.  Returns nonzero if an error occurred
   (ie. an undefined instruction).  */
static int disas_dsp_insn(DisasContext *s, uint32_t insn)
{
    int acc, rd0, rd1, rdhi, rdlo;
    TCGv_i32 tmp, tmp2;

    if ((insn & 0x0ff00f10) == 0x0e200010) {
        /* Multiply with Internal Accumulate Format */
        rd0 = (insn >> 12) & 0xf;
        rd1 = insn & 0xf;
        acc = (insn >> 5) & 7;

        if (acc != 0)
            return 1;

        tmp = load_reg(s, rd0);
        tmp2 = load_reg(s, rd1);
        switch ((insn >> 16) & 0xf) {
        case 0x0:                                       /* MIA */
            gen_helper_iwmmxt_muladdsl(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        case 0x8:                                       /* MIAPH */
            gen_helper_iwmmxt_muladdsw(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        case 0xc:                                       /* MIABB */
        case 0xd:                                       /* MIABT */
        case 0xe:                                       /* MIATB */
        case 0xf:                                       /* MIATT */
            if (insn & (1 << 16))
                tcg_gen_shri_i32(tmp, tmp, 16);
            if (insn & (1 << 17))
                tcg_gen_shri_i32(tmp2, tmp2, 16);
            gen_helper_iwmmxt_muladdswl(cpu_M0, cpu_M0, tmp, tmp2);
            break;
        default:
            return 1;
        }

        gen_op_iwmmxt_movq_wRn_M0(acc);
        return 0;
    }

    if ((insn & 0x0fe00ff8) == 0x0c400000) {
        /* Internal Accumulator Access Format */
        rdhi = (insn >> 16) & 0xf;
        rdlo = (insn >> 12) & 0xf;
        acc = insn & 7;

        if (acc != 0)
            return 1;

        if (insn & ARM_CP_RW_BIT) {                     /* MRA */
            iwmmxt_load_reg(cpu_V0, acc);
            tcg_gen_extrl_i64_i32(cpu_R[rdlo], cpu_V0);
            tcg_gen_extrh_i64_i32(cpu_R[rdhi], cpu_V0);
            tcg_gen_andi_i32(cpu_R[rdhi], cpu_R[rdhi], (1 << (40 - 32)) - 1);
        } else {                                        /* MAR */
            tcg_gen_concat_i32_i64(cpu_V0, cpu_R[rdlo], cpu_R[rdhi]);
            iwmmxt_store_reg(cpu_V0, acc);
        }
        return 0;
    }

    return 1;
}

static void gen_goto_ptr(void)
{
    tcg_gen_lookup_and_goto_ptr();
}

/* This will end the TB but doesn't guarantee we'll return to
 * cpu_loop_exec. Any live exit_requests will be processed as we
 * enter the next TB.
 */
static void gen_goto_tb(DisasContext *s, int n, target_long diff)
{
    if (translator_use_goto_tb(&s->base, s->pc_curr + diff)) {
        /*
         * For pcrel, the pc must always be up-to-date on entry to
         * the linked TB, so that it can use simple additions for all
         * further adjustments.  For !pcrel, the linked TB is compiled
         * to know its full virtual address, so we can delay the
         * update to pc to the unlinked path.  A long chain of links
         * can thus avoid many updates to the PC.
         */
        if (tb_cflags(s->base.tb) & CF_PCREL) {
            gen_update_pc(s, diff);
            tcg_gen_goto_tb(n);
        } else {
            tcg_gen_goto_tb(n);
            gen_update_pc(s, diff);
        }
        tcg_gen_exit_tb(s->base.tb, n);
    } else {
        gen_update_pc(s, diff);
        gen_goto_ptr();
    }
    s->base.is_jmp = DISAS_NORETURN;
}

/* Jump, specifying which TB number to use if we gen_goto_tb() */
static void gen_jmp_tb(DisasContext *s, target_long diff, int tbno)
{
    if (unlikely(s->ss_active)) {
        /* An indirect jump so that we still trigger the debug exception.  */
        gen_update_pc(s, diff);
        s->base.is_jmp = DISAS_JUMP;
        return;
    }
    switch (s->base.is_jmp) {
    case DISAS_NEXT:
    case DISAS_TOO_MANY:
    case DISAS_NORETURN:
        /*
         * The normal case: just go to the destination TB.
         * NB: NORETURN happens if we generate code like
         *    gen_brcondi(l);
         *    gen_jmp();
         *    gen_set_label(l);
         *    gen_jmp();
         * on the second call to gen_jmp().
         */
        gen_goto_tb(s, tbno, diff);
        break;
    case DISAS_UPDATE_NOCHAIN:
    case DISAS_UPDATE_EXIT:
        /*
         * We already decided we're leaving the TB for some other reason.
         * Avoid using goto_tb so we really do exit back to the main loop
         * and don't chain to another TB.
         */
        gen_update_pc(s, diff);
        gen_goto_ptr();
        s->base.is_jmp = DISAS_NORETURN;
        break;
    default:
        /*
         * We shouldn't be emitting code for a jump and also have
         * is_jmp set to one of the special cases like DISAS_SWI.
         */
        g_assert_not_reached();
    }
}

static inline void gen_jmp(DisasContext *s, target_long diff)
{
    gen_jmp_tb(s, diff, 0);
}

static inline void gen_mulxy(TCGv_i32 t0, TCGv_i32 t1, int x, int y)
{
    if (x)
        tcg_gen_sari_i32(t0, t0, 16);
    else
        gen_sxth(t0);
    if (y)
        tcg_gen_sari_i32(t1, t1, 16);
    else
        gen_sxth(t1);
    tcg_gen_mul_i32(t0, t0, t1);
}

/* Return the mask of PSR bits set by a MSR instruction.  */
static uint32_t msr_mask(DisasContext *s, int flags, int spsr)
{
    uint32_t mask = 0;

    if (flags & (1 << 0)) {
        mask |= 0xff;
    }
    if (flags & (1 << 1)) {
        mask |= 0xff00;
    }
    if (flags & (1 << 2)) {
        mask |= 0xff0000;
    }
    if (flags & (1 << 3)) {
        mask |= 0xff000000;
    }

    /* Mask out undefined and reserved bits.  */
    mask &= aarch32_cpsr_valid_mask(s->features, s->isar);

    /* Mask out execution state.  */
    if (!spsr) {
        mask &= ~CPSR_EXEC;
    }

    /* Mask out privileged bits.  */
    if (IS_USER(s)) {
        mask &= CPSR_USER;
    }
    return mask;
}

/* Returns nonzero if access to the PSR is not permitted. Marks t0 as dead. */
static int gen_set_psr(DisasContext *s, uint32_t mask, int spsr, TCGv_i32 t0)
{
    TCGv_i32 tmp;
    if (spsr) {
        /* ??? This is also undefined in system mode.  */
        if (IS_USER(s))
            return 1;

        tmp = load_cpu_field(spsr);
        tcg_gen_andi_i32(tmp, tmp, ~mask);
        tcg_gen_andi_i32(t0, t0, mask);
        tcg_gen_or_i32(tmp, tmp, t0);
        store_cpu_field(tmp, spsr);
    } else {
        gen_set_cpsr(t0, mask);
    }
    gen_lookup_tb(s);
    return 0;
}

/* Returns nonzero if access to the PSR is not permitted.  */
static int gen_set_psr_im(DisasContext *s, uint32_t mask, int spsr, uint32_t val)
{
    TCGv_i32 tmp;
    tmp = tcg_temp_new_i32();
    tcg_gen_movi_i32(tmp, val);
    return gen_set_psr(s, mask, spsr, tmp);
}

static bool msr_banked_access_decode(DisasContext *s, int r, int sysm, int rn,
                                     int *tgtmode, int *regno)
{
    /* Decode the r and sysm fields of MSR/MRS banked accesses into
     * the target mode and register number, and identify the various
     * unpredictable cases.
     * MSR (banked) and MRS (banked) are CONSTRAINED UNPREDICTABLE if:
     *  + executed in user mode
     *  + using R15 as the src/dest register
     *  + accessing an unimplemented register
     *  + accessing a register that's inaccessible at current PL/security state*
     *  + accessing a register that you could access with a different insn
     * We choose to UNDEF in all these cases.
     * Since we don't know which of the various AArch32 modes we are in
     * we have to defer some checks to runtime.
     * Accesses to Monitor mode registers from Secure EL1 (which implies
     * that EL3 is AArch64) must trap to EL3.
     *
     * If the access checks fail this function will emit code to take
     * an exception and return false. Otherwise it will return true,
     * and set *tgtmode and *regno appropriately.
     */
    /* These instructions are present only in ARMv8, or in ARMv7 with the
     * Virtualization Extensions.
     */
    if (!arm_dc_feature(s, ARM_FEATURE_V8) &&
        !arm_dc_feature(s, ARM_FEATURE_EL2)) {
        goto undef;
    }

    if (IS_USER(s) || rn == 15) {
        goto undef;
    }

    /* The table in the v8 ARM ARM section F5.2.3 describes the encoding
     * of registers into (r, sysm).
     */
    if (r) {
        /* SPSRs for other modes */
        switch (sysm) {
        case 0xe: /* SPSR_fiq */
            *tgtmode = ARM_CPU_MODE_FIQ;
            break;
        case 0x10: /* SPSR_irq */
            *tgtmode = ARM_CPU_MODE_IRQ;
            break;
        case 0x12: /* SPSR_svc */
            *tgtmode = ARM_CPU_MODE_SVC;
            break;
        case 0x14: /* SPSR_abt */
            *tgtmode = ARM_CPU_MODE_ABT;
            break;
        case 0x16: /* SPSR_und */
            *tgtmode = ARM_CPU_MODE_UND;
            break;
        case 0x1c: /* SPSR_mon */
            *tgtmode = ARM_CPU_MODE_MON;
            break;
        case 0x1e: /* SPSR_hyp */
            *tgtmode = ARM_CPU_MODE_HYP;
            break;
        default: /* unallocated */
            goto undef;
        }
        /* We arbitrarily assign SPSR a register number of 16. */
        *regno = 16;
    } else {
        /* general purpose registers for other modes */
        switch (sysm) {
        case 0x0 ... 0x6:   /* 0b00xxx : r8_usr ... r14_usr */
            *tgtmode = ARM_CPU_MODE_USR;
            *regno = sysm + 8;
            break;
        case 0x8 ... 0xe:   /* 0b01xxx : r8_fiq ... r14_fiq */
            *tgtmode = ARM_CPU_MODE_FIQ;
            *regno = sysm;
            break;
        case 0x10 ... 0x11: /* 0b1000x : r14_irq, r13_irq */
            *tgtmode = ARM_CPU_MODE_IRQ;
            *regno = sysm & 1 ? 13 : 14;
            break;
        case 0x12 ... 0x13: /* 0b1001x : r14_svc, r13_svc */
            *tgtmode = ARM_CPU_MODE_SVC;
            *regno = sysm & 1 ? 13 : 14;
            break;
        case 0x14 ... 0x15: /* 0b1010x : r14_abt, r13_abt */
            *tgtmode = ARM_CPU_MODE_ABT;
            *regno = sysm & 1 ? 13 : 14;
            break;
        case 0x16 ... 0x17: /* 0b1011x : r14_und, r13_und */
            *tgtmode = ARM_CPU_MODE_UND;
            *regno = sysm & 1 ? 13 : 14;
            break;
        case 0x1c ... 0x1d: /* 0b1110x : r14_mon, r13_mon */
            *tgtmode = ARM_CPU_MODE_MON;
            *regno = sysm & 1 ? 13 : 14;
            break;
        case 0x1e ... 0x1f: /* 0b1111x : elr_hyp, r13_hyp */
            *tgtmode = ARM_CPU_MODE_HYP;
            /* Arbitrarily pick 17 for ELR_Hyp (which is not a banked LR!) */
            *regno = sysm & 1 ? 13 : 17;
            break;
        default: /* unallocated */
            goto undef;
        }
    }

    /* Catch the 'accessing inaccessible register' cases we can detect
     * at translate time.
     */
    switch (*tgtmode) {
    case ARM_CPU_MODE_MON:
        if (!arm_dc_feature(s, ARM_FEATURE_EL3) || s->ns) {
            goto undef;
        }
        if (s->current_el == 1) {
            /* If we're in Secure EL1 (which implies that EL3 is AArch64)
             * then accesses to Mon registers trap to Secure EL2, if it exists,
             * otherwise EL3.
             */
            TCGv_i32 tcg_el;

            if (arm_dc_feature(s, ARM_FEATURE_AARCH64) &&
                dc_isar_feature(aa64_sel2, s)) {
                /* Target EL is EL<3 minus SCR_EL3.EEL2> */
                tcg_el = load_cpu_field_low32(cp15.scr_el3);
                tcg_gen_sextract_i32(tcg_el, tcg_el, ctz32(SCR_EEL2), 1);
                tcg_gen_addi_i32(tcg_el, tcg_el, 3);
            } else {
                tcg_el = tcg_constant_i32(3);
            }

            gen_exception_insn_el_v(s, 0, EXCP_UDEF,
                                    syn_uncategorized(), tcg_el);
            return false;
        }
        break;
    case ARM_CPU_MODE_HYP:
        /*
         * SPSR_hyp and r13_hyp can only be accessed from Monitor mode
         * (and so we can forbid accesses from EL2 or below). elr_hyp
         * can be accessed also from Hyp mode, so forbid accesses from
         * EL0 or EL1.
         */
        if (!arm_dc_feature(s, ARM_FEATURE_EL2) || s->current_el < 2 ||
            (s->current_el < 3 && *regno != 17)) {
            goto undef;
        }
        break;
    default:
        break;
    }

    return true;

undef:
    /* If we get here then some access check did not pass */
    gen_exception_insn(s, 0, EXCP_UDEF, syn_uncategorized());
    return false;
}

static void gen_msr_banked(DisasContext *s, int r, int sysm, int rn)
{
    TCGv_i32 tcg_reg;
    int tgtmode = 0, regno = 0;

    if (!msr_banked_access_decode(s, r, sysm, rn, &tgtmode, &regno)) {
        return;
    }

    /* Sync state because msr_banked() can raise exceptions */
    gen_set_condexec(s);
    gen_update_pc(s, 0);
    tcg_reg = load_reg(s, rn);
    gen_helper_msr_banked(cpu_env, tcg_reg,
                          tcg_constant_i32(tgtmode),
                          tcg_constant_i32(regno));
    s->base.is_jmp = DISAS_UPDATE_EXIT;
}

static void gen_mrs_banked(DisasContext *s, int r, int sysm, int rn)
{
    TCGv_i32 tcg_reg;
    int tgtmode = 0, regno = 0;

    if (!msr_banked_access_decode(s, r, sysm, rn, &tgtmode, &regno)) {
        return;
    }

    /* Sync state because mrs_banked() can raise exceptions */
    gen_set_condexec(s);
    gen_update_pc(s, 0);
    tcg_reg = tcg_temp_new_i32();
    gen_helper_mrs_banked(tcg_reg, cpu_env,
                          tcg_constant_i32(tgtmode),
                          tcg_constant_i32(regno));
    store_reg(s, rn, tcg_reg);
    s->base.is_jmp = DISAS_UPDATE_EXIT;
}

/* Store value to PC as for an exception return (ie don't
 * mask bits). The subsequent call to gen_helper_cpsr_write_eret()
 * will do the masking based on the new value of the Thumb bit.
 */
static void store_pc_exc_ret(DisasContext *s, TCGv_i32 pc)
{
    tcg_gen_mov_i32(cpu_R[15], pc);
}

/* Generate a v6 exception return.  Marks both values as dead.  */
static void gen_rfe(DisasContext *s, TCGv_i32 pc, TCGv_i32 cpsr)
{
    store_pc_exc_ret(s, pc);
    /* The cpsr_write_eret helper will mask the low bits of PC
     * appropriately depending on the new Thumb bit, so it must
     * be called after storing the new PC.
     */
    if (tb_cflags(s->base.tb) & CF_USE_ICOUNT) {
        gen_io_start();
    }
    gen_helper_cpsr_write_eret(cpu_env, cpsr);
    /* Must exit loop to check un-masked IRQs */
    s->base.is_jmp = DISAS_EXIT;
}

/* Generate an old-style exception return. Marks pc as dead. */
static void gen_exception_return(DisasContext *s, TCGv_i32 pc)
{
    gen_rfe(s, pc, load_cpu_field(spsr));
}

static void gen_gvec_fn3_qc(uint32_t rd_ofs, uint32_t rn_ofs, uint32_t rm_ofs,
                            uint32_t opr_sz, uint32_t max_sz,
                            gen_helper_gvec_3_ptr *fn)
{
    TCGv_ptr qc_ptr = tcg_temp_new_ptr();

    tcg_gen_addi_ptr(qc_ptr, cpu_env, offsetof(CPUARMState, vfp.qc));
    tcg_gen_gvec_3_ptr(rd_ofs, rn_ofs, rm_ofs, qc_ptr,
                       opr_sz, max_sz, 0, fn);
}

void gen_gvec_sqrdmlah_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                          uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
    static gen_helper_gvec_3_ptr * const fns[2] = {
        gen_helper_gvec_qrdmlah_s16, gen_helper_gvec_qrdmlah_s32
    };
    tcg_debug_assert(vece >= 1 && vece <= 2);
    gen_gvec_fn3_qc(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, fns[vece - 1]);
}

void gen_gvec_sqrdmlsh_qc(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                          uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
    static gen_helper_gvec_3_ptr * const fns[2] = {
        gen_helper_gvec_qrdmlsh_s16, gen_helper_gvec_qrdmlsh_s32
    };
    tcg_debug_assert(vece >= 1 && vece <= 2);
    gen_gvec_fn3_qc(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, fns[vece - 1]);
}

#define GEN_CMP0(NAME, COND)                                            \
    static void gen_##NAME##0_i32(TCGv_i32 d, TCGv_i32 a)               \
    {                                                                   \
        tcg_gen_setcondi_i32(COND, d, a, 0);                            \
        tcg_gen_neg_i32(d, d);                                          \
    }                                                                   \
    static void gen_##NAME##0_i64(TCGv_i64 d, TCGv_i64 a)               \
    {                                                                   \
        tcg_gen_setcondi_i64(COND, d, a, 0);                            \
        tcg_gen_neg_i64(d, d);                                          \
    }                                                                   \
    static void gen_##NAME##0_vec(unsigned vece, TCGv_vec d, TCGv_vec a) \
    {                                                                   \
        TCGv_vec zero = tcg_constant_vec_matching(d, vece, 0);          \
        tcg_gen_cmp_vec(COND, vece, d, a, zero);                        \
    }                                                                   \
    void gen_gvec_##NAME##0(unsigned vece, uint32_t d, uint32_t m,      \
                            uint32_t opr_sz, uint32_t max_sz)           \
    {                                                                   \
        const GVecGen2 op[4] = {                                        \
            { .fno = gen_helper_gvec_##NAME##0_b,                       \
              .fniv = gen_##NAME##0_vec,                                \
              .opt_opc = vecop_list_cmp,                                \
              .vece = MO_8 },                                           \
            { .fno = gen_helper_gvec_##NAME##0_h,                       \
              .fniv = gen_##NAME##0_vec,                                \
              .opt_opc = vecop_list_cmp,                                \
              .vece = MO_16 },                                          \
            { .fni4 = gen_##NAME##0_i32,                                \
              .fniv = gen_##NAME##0_vec,                                \
              .opt_opc = vecop_list_cmp,                                \
              .vece = MO_32 },                                          \
            { .fni8 = gen_##NAME##0_i64,                                \
              .fniv = gen_##NAME##0_vec,                                \
              .opt_opc = vecop_list_cmp,                                \
              .prefer_i64 = TCG_TARGET_REG_BITS == 64,                  \
              .vece = MO_64 },                                          \
        };                                                              \
        tcg_gen_gvec_2(d, m, opr_sz, max_sz, &op[vece]);                \
    }

static const TCGOpcode vecop_list_cmp[] = {
    INDEX_op_cmp_vec, 0
};

GEN_CMP0(ceq, TCG_COND_EQ)
GEN_CMP0(cle, TCG_COND_LE)
GEN_CMP0(cge, TCG_COND_GE)
GEN_CMP0(clt, TCG_COND_LT)
GEN_CMP0(cgt, TCG_COND_GT)

#undef GEN_CMP0

static void gen_ssra8_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_vec_sar8i_i64(a, a, shift);
    tcg_gen_vec_add8_i64(d, d, a);
}

static void gen_ssra16_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_vec_sar16i_i64(a, a, shift);
    tcg_gen_vec_add16_i64(d, d, a);
}

static void gen_ssra32_i32(TCGv_i32 d, TCGv_i32 a, int32_t shift)
{
    tcg_gen_sari_i32(a, a, shift);
    tcg_gen_add_i32(d, d, a);
}

static void gen_ssra64_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_sari_i64(a, a, shift);
    tcg_gen_add_i64(d, d, a);
}

static void gen_ssra_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    tcg_gen_sari_vec(vece, a, a, sh);
    tcg_gen_add_vec(vece, d, d, a);
}

void gen_gvec_ssra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                   int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_sari_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_ssra8_i64,
          .fniv = gen_ssra_vec,
          .fno = gen_helper_gvec_ssra_b,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni8 = gen_ssra16_i64,
          .fniv = gen_ssra_vec,
          .fno = gen_helper_gvec_ssra_h,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_ssra32_i32,
          .fniv = gen_ssra_vec,
          .fno = gen_helper_gvec_ssra_s,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_ssra64_i64,
          .fniv = gen_ssra_vec,
          .fno = gen_helper_gvec_ssra_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize]. */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    /*
     * Shifts larger than the element size are architecturally valid.
     * Signed results in all sign bits.
     */
    shift = MIN(shift, (8 << vece) - 1);
    tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
}

static void gen_usra8_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_vec_shr8i_i64(a, a, shift);
    tcg_gen_vec_add8_i64(d, d, a);
}

static void gen_usra16_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_vec_shr16i_i64(a, a, shift);
    tcg_gen_vec_add16_i64(d, d, a);
}

static void gen_usra32_i32(TCGv_i32 d, TCGv_i32 a, int32_t shift)
{
    tcg_gen_shri_i32(a, a, shift);
    tcg_gen_add_i32(d, d, a);
}

static void gen_usra64_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_shri_i64(a, a, shift);
    tcg_gen_add_i64(d, d, a);
}

static void gen_usra_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    tcg_gen_shri_vec(vece, a, a, sh);
    tcg_gen_add_vec(vece, d, d, a);
}

void gen_gvec_usra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                   int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_shri_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_usra8_i64,
          .fniv = gen_usra_vec,
          .fno = gen_helper_gvec_usra_b,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8, },
        { .fni8 = gen_usra16_i64,
          .fniv = gen_usra_vec,
          .fno = gen_helper_gvec_usra_h,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16, },
        { .fni4 = gen_usra32_i32,
          .fniv = gen_usra_vec,
          .fno = gen_helper_gvec_usra_s,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32, },
        { .fni8 = gen_usra64_i64,
          .fniv = gen_usra_vec,
          .fno = gen_helper_gvec_usra_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_64, },
    };

    /* tszimm encoding produces immediates in the range [1..esize]. */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    /*
     * Shifts larger than the element size are architecturally valid.
     * Unsigned results in all zeros as input to accumulate: nop.
     */
    if (shift < (8 << vece)) {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    } else {
        /* Nop, but we do need to clear the tail. */
        tcg_gen_gvec_mov(vece, rd_ofs, rd_ofs, opr_sz, max_sz);
    }
}

/*
 * Shift one less than the requested amount, and the low bit is
 * the rounding bit.  For the 8 and 16-bit operations, because we
 * mask the low bit, we can perform a normal integer shift instead
 * of a vector shift.
 */
static void gen_srshr8_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, sh - 1);
    tcg_gen_andi_i64(t, t, dup_const(MO_8, 1));
    tcg_gen_vec_sar8i_i64(d, a, sh);
    tcg_gen_vec_add8_i64(d, d, t);
}

static void gen_srshr16_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, sh - 1);
    tcg_gen_andi_i64(t, t, dup_const(MO_16, 1));
    tcg_gen_vec_sar16i_i64(d, a, sh);
    tcg_gen_vec_add16_i64(d, d, t);
}

static void gen_srshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh)
{
    TCGv_i32 t;

    /* Handle shift by the input size for the benefit of trans_SRSHR_ri */
    if (sh == 32) {
        tcg_gen_movi_i32(d, 0);
        return;
    }
    t = tcg_temp_new_i32();
    tcg_gen_extract_i32(t, a, sh - 1, 1);
    tcg_gen_sari_i32(d, a, sh);
    tcg_gen_add_i32(d, d, t);
}

static void gen_srshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_extract_i64(t, a, sh - 1, 1);
    tcg_gen_sari_i64(d, a, sh);
    tcg_gen_add_i64(d, d, t);
}

static void gen_srshr_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);
    TCGv_vec ones = tcg_temp_new_vec_matching(d);

    tcg_gen_shri_vec(vece, t, a, sh - 1);
    tcg_gen_dupi_vec(vece, ones, 1);
    tcg_gen_and_vec(vece, t, t, ones);
    tcg_gen_sari_vec(vece, d, a, sh);
    tcg_gen_add_vec(vece, d, d, t);
}

void gen_gvec_srshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                    int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_shri_vec, INDEX_op_sari_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_srshr8_i64,
          .fniv = gen_srshr_vec,
          .fno = gen_helper_gvec_srshr_b,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni8 = gen_srshr16_i64,
          .fniv = gen_srshr_vec,
          .fno = gen_helper_gvec_srshr_h,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_srshr32_i32,
          .fniv = gen_srshr_vec,
          .fno = gen_helper_gvec_srshr_s,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_srshr64_i64,
          .fniv = gen_srshr_vec,
          .fno = gen_helper_gvec_srshr_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize] */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    if (shift == (8 << vece)) {
        /*
         * Shifts larger than the element size are architecturally valid.
         * Signed results in all sign bits.  With rounding, this produces
         *   (-1 + 1) >> 1 == 0, or (0 + 1) >> 1 == 0.
         * I.e. always zero.
         */
        tcg_gen_gvec_dup_imm(vece, rd_ofs, opr_sz, max_sz, 0);
    } else {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    }
}

static void gen_srsra8_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    gen_srshr8_i64(t, a, sh);
    tcg_gen_vec_add8_i64(d, d, t);
}

static void gen_srsra16_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    gen_srshr16_i64(t, a, sh);
    tcg_gen_vec_add16_i64(d, d, t);
}

static void gen_srsra32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh)
{
    TCGv_i32 t = tcg_temp_new_i32();

    gen_srshr32_i32(t, a, sh);
    tcg_gen_add_i32(d, d, t);
}

static void gen_srsra64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    gen_srshr64_i64(t, a, sh);
    tcg_gen_add_i64(d, d, t);
}

static void gen_srsra_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);

    gen_srshr_vec(vece, t, a, sh);
    tcg_gen_add_vec(vece, d, d, t);
}

void gen_gvec_srsra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                    int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_shri_vec, INDEX_op_sari_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_srsra8_i64,
          .fniv = gen_srsra_vec,
          .fno = gen_helper_gvec_srsra_b,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_8 },
        { .fni8 = gen_srsra16_i64,
          .fniv = gen_srsra_vec,
          .fno = gen_helper_gvec_srsra_h,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_16 },
        { .fni4 = gen_srsra32_i32,
          .fniv = gen_srsra_vec,
          .fno = gen_helper_gvec_srsra_s,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_32 },
        { .fni8 = gen_srsra64_i64,
          .fniv = gen_srsra_vec,
          .fno = gen_helper_gvec_srsra_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize] */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    /*
     * Shifts larger than the element size are architecturally valid.
     * Signed results in all sign bits.  With rounding, this produces
     *   (-1 + 1) >> 1 == 0, or (0 + 1) >> 1 == 0.
     * I.e. always zero.  With accumulation, this leaves D unchanged.
     */
    if (shift == (8 << vece)) {
        /* Nop, but we do need to clear the tail. */
        tcg_gen_gvec_mov(vece, rd_ofs, rd_ofs, opr_sz, max_sz);
    } else {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    }
}

static void gen_urshr8_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, sh - 1);
    tcg_gen_andi_i64(t, t, dup_const(MO_8, 1));
    tcg_gen_vec_shr8i_i64(d, a, sh);
    tcg_gen_vec_add8_i64(d, d, t);
}

static void gen_urshr16_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, sh - 1);
    tcg_gen_andi_i64(t, t, dup_const(MO_16, 1));
    tcg_gen_vec_shr16i_i64(d, a, sh);
    tcg_gen_vec_add16_i64(d, d, t);
}

static void gen_urshr32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh)
{
    TCGv_i32 t;

    /* Handle shift by the input size for the benefit of trans_URSHR_ri */
    if (sh == 32) {
        tcg_gen_extract_i32(d, a, sh - 1, 1);
        return;
    }
    t = tcg_temp_new_i32();
    tcg_gen_extract_i32(t, a, sh - 1, 1);
    tcg_gen_shri_i32(d, a, sh);
    tcg_gen_add_i32(d, d, t);
}

static void gen_urshr64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_extract_i64(t, a, sh - 1, 1);
    tcg_gen_shri_i64(d, a, sh);
    tcg_gen_add_i64(d, d, t);
}

static void gen_urshr_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t shift)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);
    TCGv_vec ones = tcg_temp_new_vec_matching(d);

    tcg_gen_shri_vec(vece, t, a, shift - 1);
    tcg_gen_dupi_vec(vece, ones, 1);
    tcg_gen_and_vec(vece, t, t, ones);
    tcg_gen_shri_vec(vece, d, a, shift);
    tcg_gen_add_vec(vece, d, d, t);
}

void gen_gvec_urshr(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                    int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_shri_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_urshr8_i64,
          .fniv = gen_urshr_vec,
          .fno = gen_helper_gvec_urshr_b,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni8 = gen_urshr16_i64,
          .fniv = gen_urshr_vec,
          .fno = gen_helper_gvec_urshr_h,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_urshr32_i32,
          .fniv = gen_urshr_vec,
          .fno = gen_helper_gvec_urshr_s,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_urshr64_i64,
          .fniv = gen_urshr_vec,
          .fno = gen_helper_gvec_urshr_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize] */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    if (shift == (8 << vece)) {
        /*
         * Shifts larger than the element size are architecturally valid.
         * Unsigned results in zero.  With rounding, this produces a
         * copy of the most significant bit.
         */
        tcg_gen_gvec_shri(vece, rd_ofs, rm_ofs, shift - 1, opr_sz, max_sz);
    } else {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    }
}

static void gen_ursra8_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    if (sh == 8) {
        tcg_gen_vec_shr8i_i64(t, a, 7);
    } else {
        gen_urshr8_i64(t, a, sh);
    }
    tcg_gen_vec_add8_i64(d, d, t);
}

static void gen_ursra16_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    if (sh == 16) {
        tcg_gen_vec_shr16i_i64(t, a, 15);
    } else {
        gen_urshr16_i64(t, a, sh);
    }
    tcg_gen_vec_add16_i64(d, d, t);
}

static void gen_ursra32_i32(TCGv_i32 d, TCGv_i32 a, int32_t sh)
{
    TCGv_i32 t = tcg_temp_new_i32();

    if (sh == 32) {
        tcg_gen_shri_i32(t, a, 31);
    } else {
        gen_urshr32_i32(t, a, sh);
    }
    tcg_gen_add_i32(d, d, t);
}

static void gen_ursra64_i64(TCGv_i64 d, TCGv_i64 a, int64_t sh)
{
    TCGv_i64 t = tcg_temp_new_i64();

    if (sh == 64) {
        tcg_gen_shri_i64(t, a, 63);
    } else {
        gen_urshr64_i64(t, a, sh);
    }
    tcg_gen_add_i64(d, d, t);
}

static void gen_ursra_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);

    if (sh == (8 << vece)) {
        tcg_gen_shri_vec(vece, t, a, sh - 1);
    } else {
        gen_urshr_vec(vece, t, a, sh);
    }
    tcg_gen_add_vec(vece, d, d, t);
}

void gen_gvec_ursra(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                    int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_shri_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen2i ops[4] = {
        { .fni8 = gen_ursra8_i64,
          .fniv = gen_ursra_vec,
          .fno = gen_helper_gvec_ursra_b,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_8 },
        { .fni8 = gen_ursra16_i64,
          .fniv = gen_ursra_vec,
          .fno = gen_helper_gvec_ursra_h,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_16 },
        { .fni4 = gen_ursra32_i32,
          .fniv = gen_ursra_vec,
          .fno = gen_helper_gvec_ursra_s,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_32 },
        { .fni8 = gen_ursra64_i64,
          .fniv = gen_ursra_vec,
          .fno = gen_helper_gvec_ursra_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .load_dest = true,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize] */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
}

static void gen_shr8_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    uint64_t mask = dup_const(MO_8, 0xff >> shift);
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, shift);
    tcg_gen_andi_i64(t, t, mask);
    tcg_gen_andi_i64(d, d, ~mask);
    tcg_gen_or_i64(d, d, t);
}

static void gen_shr16_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    uint64_t mask = dup_const(MO_16, 0xffff >> shift);
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shri_i64(t, a, shift);
    tcg_gen_andi_i64(t, t, mask);
    tcg_gen_andi_i64(d, d, ~mask);
    tcg_gen_or_i64(d, d, t);
}

static void gen_shr32_ins_i32(TCGv_i32 d, TCGv_i32 a, int32_t shift)
{
    tcg_gen_shri_i32(a, a, shift);
    tcg_gen_deposit_i32(d, d, a, 0, 32 - shift);
}

static void gen_shr64_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_shri_i64(a, a, shift);
    tcg_gen_deposit_i64(d, d, a, 0, 64 - shift);
}

static void gen_shr_ins_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);
    TCGv_vec m = tcg_temp_new_vec_matching(d);

    tcg_gen_dupi_vec(vece, m, MAKE_64BIT_MASK((8 << vece) - sh, sh));
    tcg_gen_shri_vec(vece, t, a, sh);
    tcg_gen_and_vec(vece, d, d, m);
    tcg_gen_or_vec(vece, d, d, t);
}

void gen_gvec_sri(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                  int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = { INDEX_op_shri_vec, 0 };
    const GVecGen2i ops[4] = {
        { .fni8 = gen_shr8_ins_i64,
          .fniv = gen_shr_ins_vec,
          .fno = gen_helper_gvec_sri_b,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni8 = gen_shr16_ins_i64,
          .fniv = gen_shr_ins_vec,
          .fno = gen_helper_gvec_sri_h,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_shr32_ins_i32,
          .fniv = gen_shr_ins_vec,
          .fno = gen_helper_gvec_sri_s,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_shr64_ins_i64,
          .fniv = gen_shr_ins_vec,
          .fno = gen_helper_gvec_sri_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [1..esize]. */
    tcg_debug_assert(shift > 0);
    tcg_debug_assert(shift <= (8 << vece));

    /* Shift of esize leaves destination unchanged. */
    if (shift < (8 << vece)) {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    } else {
        /* Nop, but we do need to clear the tail. */
        tcg_gen_gvec_mov(vece, rd_ofs, rd_ofs, opr_sz, max_sz);
    }
}

static void gen_shl8_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    uint64_t mask = dup_const(MO_8, 0xff << shift);
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shli_i64(t, a, shift);
    tcg_gen_andi_i64(t, t, mask);
    tcg_gen_andi_i64(d, d, ~mask);
    tcg_gen_or_i64(d, d, t);
}

static void gen_shl16_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    uint64_t mask = dup_const(MO_16, 0xffff << shift);
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_shli_i64(t, a, shift);
    tcg_gen_andi_i64(t, t, mask);
    tcg_gen_andi_i64(d, d, ~mask);
    tcg_gen_or_i64(d, d, t);
}

static void gen_shl32_ins_i32(TCGv_i32 d, TCGv_i32 a, int32_t shift)
{
    tcg_gen_deposit_i32(d, d, a, shift, 32 - shift);
}

static void gen_shl64_ins_i64(TCGv_i64 d, TCGv_i64 a, int64_t shift)
{
    tcg_gen_deposit_i64(d, d, a, shift, 64 - shift);
}

static void gen_shl_ins_vec(unsigned vece, TCGv_vec d, TCGv_vec a, int64_t sh)
{
    TCGv_vec t = tcg_temp_new_vec_matching(d);
    TCGv_vec m = tcg_temp_new_vec_matching(d);

    tcg_gen_shli_vec(vece, t, a, sh);
    tcg_gen_dupi_vec(vece, m, MAKE_64BIT_MASK(0, sh));
    tcg_gen_and_vec(vece, d, d, m);
    tcg_gen_or_vec(vece, d, d, t);
}

void gen_gvec_sli(unsigned vece, uint32_t rd_ofs, uint32_t rm_ofs,
                  int64_t shift, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = { INDEX_op_shli_vec, 0 };
    const GVecGen2i ops[4] = {
        { .fni8 = gen_shl8_ins_i64,
          .fniv = gen_shl_ins_vec,
          .fno = gen_helper_gvec_sli_b,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni8 = gen_shl16_ins_i64,
          .fniv = gen_shl_ins_vec,
          .fno = gen_helper_gvec_sli_h,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_shl32_ins_i32,
          .fniv = gen_shl_ins_vec,
          .fno = gen_helper_gvec_sli_s,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_shl64_ins_i64,
          .fniv = gen_shl_ins_vec,
          .fno = gen_helper_gvec_sli_d,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };

    /* tszimm encoding produces immediates in the range [0..esize-1]. */
    tcg_debug_assert(shift >= 0);
    tcg_debug_assert(shift < (8 << vece));

    if (shift == 0) {
        tcg_gen_gvec_mov(vece, rd_ofs, rm_ofs, opr_sz, max_sz);
    } else {
        tcg_gen_gvec_2i(rd_ofs, rm_ofs, opr_sz, max_sz, shift, &ops[vece]);
    }
}

static void gen_mla8_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    gen_helper_neon_mul_u8(a, a, b);
    gen_helper_neon_add_u8(d, d, a);
}

static void gen_mls8_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    gen_helper_neon_mul_u8(a, a, b);
    gen_helper_neon_sub_u8(d, d, a);
}

static void gen_mla16_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    gen_helper_neon_mul_u16(a, a, b);
    gen_helper_neon_add_u16(d, d, a);
}

static void gen_mls16_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    gen_helper_neon_mul_u16(a, a, b);
    gen_helper_neon_sub_u16(d, d, a);
}

static void gen_mla32_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_mul_i32(a, a, b);
    tcg_gen_add_i32(d, d, a);
}

static void gen_mls32_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_mul_i32(a, a, b);
    tcg_gen_sub_i32(d, d, a);
}

static void gen_mla64_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_mul_i64(a, a, b);
    tcg_gen_add_i64(d, d, a);
}

static void gen_mls64_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_mul_i64(a, a, b);
    tcg_gen_sub_i64(d, d, a);
}

static void gen_mla_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
{
    tcg_gen_mul_vec(vece, a, a, b);
    tcg_gen_add_vec(vece, d, d, a);
}

static void gen_mls_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
{
    tcg_gen_mul_vec(vece, a, a, b);
    tcg_gen_sub_vec(vece, d, d, a);
}

/* Note that while NEON does not support VMLA and VMLS as 64-bit ops,
 * these tables are shared with AArch64 which does support them.
 */
void gen_gvec_mla(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                  uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_mul_vec, INDEX_op_add_vec, 0
    };
    static const GVecGen3 ops[4] = {
        { .fni4 = gen_mla8_i32,
          .fniv = gen_mla_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni4 = gen_mla16_i32,
          .fniv = gen_mla_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_mla32_i32,
          .fniv = gen_mla_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_mla64_i64,
          .fniv = gen_mla_vec,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };
    tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &ops[vece]);
}

void gen_gvec_mls(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                  uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = {
        INDEX_op_mul_vec, INDEX_op_sub_vec, 0
    };
    static const GVecGen3 ops[4] = {
        { .fni4 = gen_mls8_i32,
          .fniv = gen_mls_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni4 = gen_mls16_i32,
          .fniv = gen_mls_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_mls32_i32,
          .fniv = gen_mls_vec,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_mls64_i64,
          .fniv = gen_mls_vec,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .load_dest = true,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };
    tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &ops[vece]);
}

/* CMTST : test is "if (X & Y != 0)". */
static void gen_cmtst_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_and_i32(d, a, b);
    tcg_gen_setcondi_i32(TCG_COND_NE, d, d, 0);
    tcg_gen_neg_i32(d, d);
}

void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_and_i64(d, a, b);
    tcg_gen_setcondi_i64(TCG_COND_NE, d, d, 0);
    tcg_gen_neg_i64(d, d);
}

static void gen_cmtst_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
{
    tcg_gen_and_vec(vece, d, a, b);
    tcg_gen_dupi_vec(vece, a, 0);
    tcg_gen_cmp_vec(TCG_COND_NE, vece, d, d, a);
}

void gen_gvec_cmtst(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
{
    static const TCGOpcode vecop_list[] = { INDEX_op_cmp_vec, 0 };
    static const GVecGen3 ops[4] = {
        { .fni4 = gen_helper_neon_tst_u8,
          .fniv = gen_cmtst_vec,
          .opt_opc = vecop_list,
          .vece = MO_8 },
        { .fni4 = gen_helper_neon_tst_u16,
          .fniv = gen_cmtst_vec,
          .opt_opc = vecop_list,
          .vece = MO_16 },
        { .fni4 = gen_cmtst_i32,
          .fniv = gen_cmtst_vec,
          .opt_opc = vecop_list,
          .vece = MO_32 },
        { .fni8 = gen_cmtst_i64,
          .fniv = gen_cmtst_vec,
          .prefer_i64 = TCG_TARGET_REG_BITS == 64,
          .opt_opc = vecop_list,
          .vece = MO_64 },
    };
    tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &ops[vece]);
}

void gen_ushl_i32(TCGv_i32 dst, TCGv_i32 src, TCGv_i32 shift)
{
    TCGv_i32 lval = tcg_temp_new_i32();
    TCGv_i32 rval = tcg_temp_new_i32();
    TCGv_i32 lsh = tcg_temp_new_i32();
    TCGv_i32 rsh = tcg_temp_new_i32();
    TCGv_i32 zero = tcg_constant_i32(0);
    TCGv_i32 max = tcg_constant_i32(32);

    /*
     * Rely on the TCG guarantee that out of range shifts produce
     * unspecified results, not undefined behaviour (i.e. no trap).
     * Discard out-of-range results after the fact.
     */
    tcg_gen_ext8s_i32(lsh, shift);
    tcg_gen_neg_i32(rsh, lsh);
    tcg_gen_shl_i32(lval, src, lsh);
    tcg_gen_shr_i32(rval, src, rsh);
    tcg_gen_movcond_i32(TCG_COND_LTU, dst, lsh, max, lval, zero);
    tcg_gen_movcond_i32(TCG_COND_LTU, dst, rsh, max, rval, dst);
}

void gen_ushl_i64(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 shift)
{
    TCGv_i64 lval = tcg_temp_new_i64();
    TCGv_i64 rval = tcg_temp_new_i64();
    TCGv_i64 lsh = tcg_temp_new_i64();
    TCGv_i64 rsh = tcg_temp_new_i64();
    TCGv_i64 zero = tcg_constant_i64(0);
    TCGv_i64 max = tcg_constant_i64(64);

    /*
     * Rely on the TCG guarantee that out of range shifts produce
     * unspecified results, not undefined behaviour (i.e. no trap).
     * Discard out-of-range results after the fact.
     */
    tcg_gen_ext8s_i64(lsh, shift);
    tcg_gen_neg_i64(rsh, lsh);
    tcg_gen_shl_i64(lval, src, lsh);
    tcg_gen_shr_i64(rval, src, rsh);
    tcg_gen_movcond_i64(TCG_COND_LTU, dst, lsh, max, lval, zero);
    tcg_gen_movcond_i64(TCG_COND_LTU, dst, rsh, max, rval, dst);
}

static void gen_ushl_vec(unsigned vece, TCGv_vec dst,
                         TCGv_vec src, TCGv_vec shift)
{
    TCGv_vec lval = tcg_temp_new_vec_matching(dst);
    TCGv_vec rval = tcg_temp_new_vec_matching(dst);
    TCGv_vec lsh = tcg_temp_new_vec_matching(dst);
    TCGv_vec rsh = tcg_temp_new_vec_matching(dst);
    TCGv_vec msk, max;

    tcg_gen_neg_vec(vece, rsh, shift);
    if (vece == MO_8) {
        tcg_gen_mov_vec(lsh, shift);
    } else {
        msk = tcg_temp_new_vec_matching(dst);
        tcg_gen_dupi_vec(vece, msk, 0xff);
        tcg_gen_and_vec(vece, lsh, shift, msk);
        tcg_gen_and_vec(vece, rsh, rsh, msk);
    }

    /*
     * Rely on the TCG guarantee that out of range shifts produce
     * unspecified results, not undefined behaviour (i.e. no trap).
     * Discard out-of-range results after the fact.
     */
    tcg_gen_shlv_vec(vece, lval, src, lsh);
    tcg_gen_shrv_vec(vece, rval, src, rsh);

    max = tcg_temp_new_vec_matching(dst);
    tcg_gen_dupi_vec(vece, max, 8 << vece);

    /*
     * The choice of LT (signed) and GEU (unsigned) are biased toward
     * the instructions of the x86_64 host.  For MO_8, the whole byte
     * is significant so we must use an unsigned compare; otherwise we
     * have already masked to a byte and so a signed compare works.
     * Other tcg hosts have a full set of comparisons and do not care.
     */