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
  19 static 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
  29 static 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 */