llvm/lib/Target/PowerPC/PPCMacroFusion.def

   1 //=== ---- PPCMacroFusion.def - PowerPC MacroFuson Candidates -v-*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https)//llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier) Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains descriptions of the macro-fusion pair for PowerPC.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 // NOTE: NO INCLUDE GUARD DESIRED!
  14
  15 #ifndef FUSION_FEATURE
  16
  17 // Each FUSION_FEATURE is assigned with one TYPE, and can be enabled/disabled
  18 // by HAS_FEATURE. The instructions pair is fusable only when the opcode
  19 // of the first instruction is in OPSET1, and the second instruction opcode is
  20 // in OPSET2. And if DEP_OP_IDX >=0, we will check the result of first OP is
  21 // the operand of the second op with DEP_OP_IDX as its operand index. We assume
  22 // that the result of the first op is its operand zero.
  23 #define FUSION_FEATURE(TYPE, HAS_FEATURE, DEP_OP_IDX, OPSET1, OPSET2)
  24
  25 #endif
  26
  27 #ifndef FUSION_OP_SET
  28 #define FUSION_OP_SET(...) __VA_ARGS__
  29 #endif
  30
  31 // Power8 User Manual Section 10.1.12, Instruction Fusion
  32 // {addi} followed by one of these {lxvd2x, lxvw4x, lxvdsx, lvebx, lvehx,
  33 // lvewx, lvx, lxsdx}
  34 FUSION_FEATURE(AddiLoad, hasAddiLoadFusion, 2, \
  35                FUSION_OP_SET(ADDI, ADDI8, ADDItocL), \
  36                FUSION_OP_SET(LXVD2X, LXVW4X, LXVDSX, LVEBX, LVEHX, LVEWX, \
  37                              LVX, LXSDX))
  38
  39 // {addis) followed by one of these {ld, lbz, lhz, lwz}
  40 FUSION_FEATURE(AddisLoad, hasAddisLoadFusion, 2, \
  41                FUSION_OP_SET(ADDIS, ADDIS8, ADDIStocHA8), \
  42                FUSION_OP_SET(LD, LBZ, LBZ8, LHZ, LHZ8, LWZ, LWZ8))
  43
  44 #undef FUSION_FEATURE
  45 #undef FUSION_OP_SET