LXR qemu/target-i386/exec.h

   1/*
   2 *  i386 execution defines
   3 *
   4 *  Copyright (c) 2003 Fabrice Bellard
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19#include "config.h"
  20#include "dyngen-exec.h"
  21
  22/* XXX: factorize this mess */
  23#ifdef TARGET_X86_64
  24#define TARGET_LONG_BITS 64
  25#else
  26#define TARGET_LONG_BITS 32
  27#endif
  28
  29#include "cpu-defs.h"
  30
  31register struct CPUX86State *env asm(AREG0);
  32
  33#include "qemu-common.h"
  34#include "qemu-log.h"
  35
  36#undef EAX
  37#define EAX (env->regs[R_EAX])
  38#undef ECX
  39#define ECX (env->regs[R_ECX])
  40#undef EDX
  41#define EDX (env->regs[R_EDX])
  42#undef EBX
  43#define EBX (env->regs[R_EBX])
  44#undef ESP
  45#define ESP (env->regs[R_ESP])
  46#undef EBP
  47#define EBP (env->regs[R_EBP])
  48#undef ESI
  49#define ESI (env->regs[R_ESI])
  50#undef EDI
  51#define EDI (env->regs[R_EDI])
  52#undef EIP
  53#define EIP (env->eip)
  54#define DF  (env->df)
  55
  56#define CC_SRC (env->cc_src)
  57#define CC_DST (env->cc_dst)
  58#define CC_OP  (env->cc_op)
  59
  60/* float macros */
  61#define FT0    (env->ft0)
  62#define ST0    (env->fpregs[env->fpstt].d)
  63#define ST(n)  (env->fpregs[(env->fpstt + (n)) & 7].d)
  64#define ST1    ST(1)
  65
  66#include "cpu.h"
  67#include "exec-all.h"
  68
  69/* op_helper.c */
  70void do_interrupt(int intno, int is_int, int error_code,
  71                  target_ulong next_eip, int is_hw);
  72void do_interrupt_user(int intno, int is_int, int error_code,
  73                       target_ulong next_eip);
  74void QEMU_NORETURN raise_exception_err(int exception_index, int error_code);
  75void QEMU_NORETURN raise_exception(int exception_index);
  76void QEMU_NORETURN raise_exception_env(int exception_index, CPUState *nenv);
  77void do_smm_enter(void);
  78
  79/* n must be a constant to be efficient */
  80static inline target_long lshift(target_long x, int n)
  81{
  82    if (n >= 0)
  83        return x << n;
  84    else
  85        return x >> (-n);
  86}
  87
  88#include "helper.h"
  89
  90static inline void svm_check_intercept(uint32_t type)
  91{
  92    helper_svm_check_intercept_param(type, 0);
  93}
  94
  95#if !defined(CONFIG_USER_ONLY)
  96
  97#include "softmmu_exec.h"
  98
  99#endif /* !defined(CONFIG_USER_ONLY) */
 100
 101#ifdef USE_X86LDOUBLE
 102/* use long double functions */
 103#define floatx_to_int32 floatx80_to_int32
 104#define floatx_to_int64 floatx80_to_int64
 105#define floatx_to_int32_round_to_zero floatx80_to_int32_round_to_zero
 106#define floatx_to_int64_round_to_zero floatx80_to_int64_round_to_zero
 107#define int32_to_floatx int32_to_floatx80
 108#define int64_to_floatx int64_to_floatx80
 109#define float32_to_floatx float32_to_floatx80
 110#define float64_to_floatx float64_to_floatx80
 111#define floatx_to_float32 floatx80_to_float32
 112#define floatx_to_float64 floatx80_to_float64
 113#define floatx_abs floatx80_abs
 114#define floatx_chs floatx80_chs
 115#define floatx_round_to_int floatx80_round_to_int
 116#define floatx_compare floatx80_compare
 117#define floatx_compare_quiet floatx80_compare_quiet
 118#else
 119#define floatx_to_int32 float64_to_int32
 120#define floatx_to_int64 float64_to_int64
 121#define floatx_to_int32_round_to_zero float64_to_int32_round_to_zero
 122#define floatx_to_int64_round_to_zero float64_to_int64_round_to_zero
 123#define int32_to_floatx int32_to_float64
 124#define int64_to_floatx int64_to_float64
 125#define float32_to_floatx float32_to_float64
 126#define float64_to_floatx(x, e) (x)
 127#define floatx_to_float32 float64_to_float32
 128#define floatx_to_float64(x, e) (x)
 129#define floatx_abs float64_abs
 130#define floatx_chs float64_chs
 131#define floatx_round_to_int float64_round_to_int
 132#define floatx_compare float64_compare
 133#define floatx_compare_quiet float64_compare_quiet
 134#endif
 135
 136#define RC_MASK         0xc00
 137#define RC_NEAR         0x000
 138#define RC_DOWN         0x400
 139#define RC_UP           0x800
 140#define RC_CHOP         0xc00
 141
 142#define MAXTAN 9223372036854775808.0
 143
 144#ifdef USE_X86LDOUBLE
 145
 146/* only for x86 */
 147typedef union {
 148    long double d;
 149    struct {
 150        unsigned long long lower;
 151        unsigned short upper;
 152    } l;
 153} CPU86_LDoubleU;
 154
 155/* the following deal with x86 long double-precision numbers */
 156#define MAXEXPD 0x7fff
 157#define EXPBIAS 16383
 158#define EXPD(fp)        (fp.l.upper & 0x7fff)
 159#define SIGND(fp)       ((fp.l.upper) & 0x8000)
 160#define MANTD(fp)       (fp.l.lower)
 161#define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
 162
 163#else
 164
 165/* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
 166typedef union {
 167    double d;
 168#if !defined(HOST_WORDS_BIGENDIAN) && !defined(__arm__)
 169    struct {
 170        uint32_t lower;
 171        int32_t upper;
 172    } l;
 173#else
 174    struct {
 175        int32_t upper;
 176        uint32_t lower;
 177    } l;
 178#endif
 179#ifndef __arm__
 180    int64_t ll;
 181#endif
 182} CPU86_LDoubleU;
 183
 184/* the following deal with IEEE double-precision numbers */
 185#define MAXEXPD 0x7ff
 186#define EXPBIAS 1023
 187#define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
 188#define SIGND(fp)       ((fp.l.upper) & 0x80000000)
 189#ifdef __arm__
 190#define MANTD(fp)       (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
 191#else
 192#define MANTD(fp)       (fp.ll & ((1LL << 52) - 1))
 193#endif
 194#define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
 195#endif
 196
 197static inline void fpush(void)
 198{
 199    env->fpstt = (env->fpstt - 1) & 7;
 200    env->fptags[env->fpstt] = 0; /* validate stack entry */
 201}
 202
 203static inline void fpop(void)
 204{
 205    env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
 206    env->fpstt = (env->fpstt + 1) & 7;
 207}
 208
 209#ifndef USE_X86LDOUBLE
 210static inline CPU86_LDouble helper_fldt(target_ulong ptr)
 211{
 212    CPU86_LDoubleU temp;
 213    int upper, e;
 214    uint64_t ll;
 215
 216    /* mantissa */
 217    upper = lduw(ptr + 8);
 218    /* XXX: handle overflow ? */
 219    e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
 220    e |= (upper >> 4) & 0x800; /* sign */
 221    ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
 222#ifdef __arm__
 223    temp.l.upper = (e << 20) | (ll >> 32);
 224    temp.l.lower = ll;
 225#else
 226    temp.ll = ll | ((uint64_t)e << 52);
 227#endif
 228    return temp.d;
 229}
 230
 231static inline void helper_fstt(CPU86_LDouble f, target_ulong ptr)
 232{
 233    CPU86_LDoubleU temp;
 234    int e;
 235
 236    temp.d = f;
 237    /* mantissa */
 238    stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
 239    /* exponent + sign */
 240    e = EXPD(temp) - EXPBIAS + 16383;
 241    e |= SIGND(temp) >> 16;
 242    stw(ptr + 8, e);
 243}
 244#else
 245
 246/* we use memory access macros */
 247
 248static inline CPU86_LDouble helper_fldt(target_ulong ptr)
 249{
 250    CPU86_LDoubleU temp;
 251
 252    temp.l.lower = ldq(ptr);
 253    temp.l.upper = lduw(ptr + 8);
 254    return temp.d;
 255}
 256
 257static inline void helper_fstt(CPU86_LDouble f, target_ulong ptr)
 258{
 259    CPU86_LDoubleU temp;
 260
 261    temp.d = f;
 262    stq(ptr, temp.l.lower);
 263    stw(ptr + 8, temp.l.upper);
 264}
 265
 266#endif /* USE_X86LDOUBLE */
 267
 268#define FPUS_IE (1 << 0)
 269#define FPUS_DE (1 << 1)
 270#define FPUS_ZE (1 << 2)
 271#define FPUS_OE (1 << 3)
 272#define FPUS_UE (1 << 4)
 273#define FPUS_PE (1 << 5)
 274#define FPUS_SF (1 << 6)
 275#define FPUS_SE (1 << 7)
 276#define FPUS_B  (1 << 15)
 277
 278#define FPUC_EM 0x3f
 279
 280static inline uint32_t compute_eflags(void)
 281{
 282    return env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
 283}
 284
 285/* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
 286static inline void load_eflags(int eflags, int update_mask)
 287{
 288    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
 289    DF = 1 - (2 * ((eflags >> 10) & 1));
 290    env->eflags = (env->eflags & ~update_mask) |
 291        (eflags & update_mask) | 0x2;
 292}
 293
 294static inline int cpu_has_work(CPUState *env)
 295{
 296    int work;
 297
 298    work = (env->interrupt_request & CPU_INTERRUPT_HARD) &&
 299           (env->eflags & IF_MASK);
 300    work |= env->interrupt_request & CPU_INTERRUPT_NMI;
 301    work |= env->interrupt_request & CPU_INTERRUPT_INIT;
 302    work |= env->interrupt_request & CPU_INTERRUPT_SIPI;
 303
 304    return work;
 305}
 306
 307static inline int cpu_halted(CPUState *env) {
 308    /* handle exit of HALTED state */
 309    if (!env->halted)
 310        return 0;
 311    /* disable halt condition */
 312    if (cpu_has_work(env)) {
 313        env->halted = 0;
 314        return 0;
 315    }
 316    return EXCP_HALTED;
 317}
 318
 319/* load efer and update the corresponding hflags. XXX: do consistency
 320   checks with cpuid bits ? */
 321static inline void cpu_load_efer(CPUState *env, uint64_t val)
 322{
 323    env->efer = val;
 324    env->hflags &= ~(HF_LMA_MASK | HF_SVME_MASK);
 325    if (env->efer & MSR_EFER_LMA)
 326        env->hflags |= HF_LMA_MASK;
 327    if (env->efer & MSR_EFER_SVME)
 328        env->hflags |= HF_SVME_MASK;
 329}
 330
 331static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
 332{
 333    env->eip = tb->pc - tb->cs_base;
 334}
 335
 336