LXR linux/arch/tile/include/asm/insn.h

   1/*
   2 * Copyright 2015 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 */
  14#ifndef __ASM_TILE_INSN_H
  15#define __ASM_TILE_INSN_H
  16
  17#include <arch/opcode.h>
  18
  19static inline tilegx_bundle_bits NOP(void)
  20{
  21        return create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
  22                create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
  23                create_Opcode_X0(RRR_0_OPCODE_X0) |
  24                create_UnaryOpcodeExtension_X1(NOP_UNARY_OPCODE_X1) |
  25                create_RRROpcodeExtension_X1(UNARY_RRR_0_OPCODE_X1) |
  26                create_Opcode_X1(RRR_0_OPCODE_X1);
  27}
  28
  29static inline tilegx_bundle_bits tilegx_gen_branch(unsigned long pc,
  30                                            unsigned long addr,
  31                                            bool link)
  32{
  33        tilegx_bundle_bits opcode_x0, opcode_x1;
  34        long pcrel_by_instr = (addr - pc) >> TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES;
  35
  36        if (link) {
  37                /* opcode: jal addr */
  38                opcode_x1 =
  39                        create_Opcode_X1(JUMP_OPCODE_X1) |
  40                        create_JumpOpcodeExtension_X1(JAL_JUMP_OPCODE_X1) |
  41                        create_JumpOff_X1(pcrel_by_instr);
  42        } else {
  43                /* opcode: j addr */
  44                opcode_x1 =
  45                        create_Opcode_X1(JUMP_OPCODE_X1) |
  46                        create_JumpOpcodeExtension_X1(J_JUMP_OPCODE_X1) |
  47                        create_JumpOff_X1(pcrel_by_instr);
  48        }
  49
  50        /* opcode: fnop */
  51        opcode_x0 =
  52                create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
  53                create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
  54                create_Opcode_X0(RRR_0_OPCODE_X0);
  55
  56        return opcode_x1 | opcode_x0;
  57}
  58
  59#endif /* __ASM_TILE_INSN_H */
  60