//=== ---- PPCMacroFusion.def - PowerPC MacroFuson Candidates -v-*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https)//llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier) Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains descriptions of the macro-fusion pair for PowerPC.
//
//===----------------------------------------------------------------------===//

// NOTE: NO INCLUDE GUARD DESIRED!

#ifndef FUSION_FEATURE

// Each FUSION_FEATURE is assigned with one TYPE, and can be enabled/disabled
// by HAS_FEATURE. The instructions pair is fusable only when the opcode
// of the first instruction is in OPSET1, and the second instruction opcode is
// in OPSET2. And if DEP_OP_IDX >=0, we will check the result of first OP is  
// the operand of the second op with DEP_OP_IDX as its operand index. We assume
// that the result of the first op is its operand zero. 
#define FUSION_FEATURE(TYPE, HAS_FEATURE, DEP_OP_IDX, OPSET1, OPSET2)

#endif

#ifndef FUSION_OP_SET
#define FUSION_OP_SET(...) __VA_ARGS__ 
#endif

// Power8 User Manual Section 10.1.12, Instruction Fusion 
// {addi} followed by one of these {lxvd2x, lxvw4x, lxvdsx, lvebx, lvehx,
// lvewx, lvx, lxsdx}
FUSION_FEATURE(AddiLoad, hasAddiLoadFusion, 2, \
               FUSION_OP_SET(ADDI, ADDI8, ADDItocL), \
               FUSION_OP_SET(LXVD2X, LXVW4X, LXVDSX, LVEBX, LVEHX, LVEWX, \
                             LVX, LXSDX))

// {addis) followed by one of these {ld, lbz, lhz, lwz}
FUSION_FEATURE(AddisLoad, hasAddisLoadFusion, 2, \
               FUSION_OP_SET(ADDIS, ADDIS8, ADDIStocHA8), \
               FUSION_OP_SET(LD, LBZ, LBZ8, LHZ, LHZ8, LWZ, LWZ8))

// Power10 User Manual Section 19.1.5.4, Fusion
// {add, mulld} - add
FUSION_FEATURE(ArithAdd, hasArithAddFusion, -1,
               FUSION_OP_SET(ADD4, ADD8, MULLD), FUSION_OP_SET(ADD4, ADD8))

// {add, subf} - {and, nand, nor, or}
FUSION_FEATURE(ArithLogical, hasAddLogicalFusion, -1,
               FUSION_OP_SET(ADD4, ADD8, SUBF, SUBF8),
               FUSION_OP_SET(AND, AND8, OR, OR8, NAND, NAND8, NOR, NOR8))

// {and, andc, eqv, nand, nor, or, orc, xor} - {add, subf}
FUSION_FEATURE(LogicalArith, hasLogicalAddFusion, -1,
               FUSION_OP_SET(AND, ANDC, EQV, NAND, NOR, OR, ORC, XOR, AND8,
                             ANDC8, EQV8, NAND8, NOR8, OR8, ORC8, XOR8),
               FUSION_OP_SET(ADD4, ADD8, SUBF, SUBF8))

// Either of {and, andc, eqv, nand, nor, or, orc, xor}
FUSION_FEATURE(Logical, hasLogicalFusion, -1,
               FUSION_OP_SET(AND, ANDC, EQV, NAND, NOR, OR, ORC, XOR, AND8,
                             ANDC8, EQV8, NAND8, NOR8, OR8, ORC8, XOR8),
               FUSION_OP_SET(AND, ANDC, EQV, NAND, NOR, OR, ORC, XOR, AND8,
                             ANDC8, EQV8, NAND8, NOR8, OR8, ORC8, XOR8))

// vaddudm - vaddudm
FUSION_FEATURE(VecAdd, hasArithAddFusion, -1, FUSION_OP_SET(VADDUDM),
               FUSION_OP_SET(VADDUDM))

// Either of {vand, vandc, veqv, vnand, vnor, vor, vorc, vxor}
FUSION_FEATURE(VecLogical, hasLogicalFusion, -1,
               FUSION_OP_SET(VAND, VANDC, VEQV, VNAND, VNOR, VOR, VORC, VXOR),
               FUSION_OP_SET(VAND, VANDC, VEQV, VNAND, VNOR, VOR, VORC, VXOR))

// sldi rx, ra, {3, 6} - {add, subf}
// sldi rx, ra n is alias of rldicr rx, ra, n, 63-n
FUSION_FEATURE(SldiAdd, hasArithAddFusion, -1, FUSION_OP_SET(RLDICR, RLDICR_32),
               FUSION_OP_SET(ADD4, ADD8, SUBF, SUBF8))

// rldicl rx, ra, 1, 0  - xor
FUSION_FEATURE(RotateLeftXor, hasSha3Fusion, 1,
               FUSION_OP_SET(RLDICL, RLDICL_32, RLDICL_32_64),
               FUSION_OP_SET(XOR, XOR8))

// rldicr rx, ra, 1, 63 - xor
FUSION_FEATURE(RotateRightXor, hasSha3Fusion, 1,
               FUSION_OP_SET(RLDICR, RLDICR_32), FUSION_OP_SET(XOR, XOR8))

// There're two special cases in 'load-compare' series, so we have to split
// them into several pattern groups to fit into current framework. This can
// be clearer once we switched to a more expressive approach.

// { lbz,lbzx,lhz,lhzx,lwz,lwzx } - cmpi 0,1,rx,{ 0,1,-1 }
// { lbz,lbzx,lhz,lhzx,lwz,lwzx } - cmpli 0,L,rx,{ 0,1 }
FUSION_FEATURE(LoadCmp1, hasCompareFusion, 1,
               FUSION_OP_SET(LBZ, LBZ8, LBZX, LBZX8, LBZXTLS, LBZXTLS_,
                             LBZXTLS_32, LHZ, LHZ8, LHZX, LHZX8, LHZXTLS,
                             LHZXTLS_, LHZXTLS_32, LWZ, LWZ8, LWZX, LWZX8,
                             LWZXTLS, LWZXTLS_, LWZXTLS_32),
               FUSION_OP_SET(CMPDI, CMPLDI, CMPLWI))

// { ld,ldx } - cmpi 0,1,rx,{ 0,1,-1 }
// { ld,ldx } - cmpli 0,1,rx,{ 0,1 }
FUSION_FEATURE(LoadCmp2, hasCompareFusion, 1,
               FUSION_OP_SET(LD, LDX, LDXTLS, LDXTLS_),
               FUSION_OP_SET(CMPDI, CMPLDI))

// { lha,lhax,lwa,lwax } - cmpi 0,L,rx,{ 0,1,-1 }
FUSION_FEATURE(LoadCmp3, hasCompareFusion, 1,
               FUSION_OP_SET(LHA, LHA8, LHAX, LHAX8, LWA, LWA_32, LWAX,
                             LWAX_32),
               FUSION_OP_SET(CMPLDI, CMPLWI))

// ori - oris
FUSION_FEATURE(OriOris, hasWideImmFusion, 1, FUSION_OP_SET(ORI, ORI8),
               FUSION_OP_SET(ORIS, ORIS8))

// lis - ori
FUSION_FEATURE(LisOri, hasWideImmFusion, 1, FUSION_OP_SET(LIS, LIS8),
               FUSION_OP_SET(ORI, ORI8))

// oris - ori
FUSION_FEATURE(OrisOri, hasWideImmFusion, 1, FUSION_OP_SET(ORIS, ORIS8),
               FUSION_OP_SET(ORI, ORI8))

// xori - xoris
FUSION_FEATURE(XoriXoris, hasWideImmFusion, 1, FUSION_OP_SET(XORI, XORI8),
               FUSION_OP_SET(XORIS, XORIS8))

// xoris - xori
FUSION_FEATURE(XorisXori, hasWideImmFusion, 1, FUSION_OP_SET(XORIS, XORIS8),
               FUSION_OP_SET(XORI, XORI8))

// addis rx,ra,si - addi rt,rx,SI, SI >= 0
FUSION_FEATURE(AddisAddi, hasWideImmFusion, 1,
               FUSION_OP_SET(ADDIS, ADDIS8, ADDIStocHA8),
               FUSION_OP_SET(ADDI, ADDI8, ADDItocL))

// addi rx,ra,si - addis rt,rx,SI, ra > 0, SI >= 2
FUSION_FEATURE(AddiAddis, hasWideImmFusion, 1,
               FUSION_OP_SET(ADDI, ADDI8, ADDItocL),
               FUSION_OP_SET(ADDIS, ADDIS8, ADDIStocHA8))

// mtctr - { bcctr,bcctrl }
FUSION_FEATURE(ZeroMoveCTR, hasZeroMoveFusion, -1,
               FUSION_OP_SET(MTCTR, MTCTRloop, MTSPR8, MTSPR),
               FUSION_OP_SET(BCCTR, BCCTRn, BCCTR8, BCCTR8n, BCCTRL, BCCTRLn,
                             BCCTRL8, BCCTRL8n, gBCCTR, gBCCTRL))

// mtlr - { bclr,bclrl }
FUSION_FEATURE(ZeroMoveLR, hasZeroMoveFusion, -1,
               FUSION_OP_SET(MTLR8, MTLR, MTSPR8, MTSPR),
               FUSION_OP_SET(BCLR, BCLRn, gBCLR, BCLRL, BCLRLn, gBCLRL))

#undef FUSION_FEATURE
#undef FUSION_OP_SET