1*0b57cec5SDimitry Andric //===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- C++ -*-===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file contains the interface to query the X86 memory folding tables. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H 14*0b57cec5SDimitry Andric #define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H 15*0b57cec5SDimitry Andric 16*0b57cec5SDimitry Andric #include "llvm/Support/DataTypes.h" 17*0b57cec5SDimitry Andric 18*0b57cec5SDimitry Andric namespace llvm { 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric enum { 21*0b57cec5SDimitry Andric // Select which memory operand is being unfolded. 22*0b57cec5SDimitry Andric // (stored in bits 0 - 3) 23*0b57cec5SDimitry Andric TB_INDEX_0 = 0, 24*0b57cec5SDimitry Andric TB_INDEX_1 = 1, 25*0b57cec5SDimitry Andric TB_INDEX_2 = 2, 26*0b57cec5SDimitry Andric TB_INDEX_3 = 3, 27*0b57cec5SDimitry Andric TB_INDEX_4 = 4, 28*0b57cec5SDimitry Andric TB_INDEX_MASK = 0xf, 29*0b57cec5SDimitry Andric 30*0b57cec5SDimitry Andric // Do not insert the reverse map (MemOp -> RegOp) into the table. 31*0b57cec5SDimitry Andric // This may be needed because there is a many -> one mapping. 32*0b57cec5SDimitry Andric TB_NO_REVERSE = 1 << 4, 33*0b57cec5SDimitry Andric 34*0b57cec5SDimitry Andric // Do not insert the forward map (RegOp -> MemOp) into the table. 35*0b57cec5SDimitry Andric // This is needed for Native Client, which prohibits branch 36*0b57cec5SDimitry Andric // instructions from using a memory operand. 37*0b57cec5SDimitry Andric TB_NO_FORWARD = 1 << 5, 38*0b57cec5SDimitry Andric 39*0b57cec5SDimitry Andric TB_FOLDED_LOAD = 1 << 6, 40*0b57cec5SDimitry Andric TB_FOLDED_STORE = 1 << 7, 41*0b57cec5SDimitry Andric 42*0b57cec5SDimitry Andric // Minimum alignment required for load/store. 43*0b57cec5SDimitry Andric // Used for RegOp->MemOp conversion. 44*0b57cec5SDimitry Andric // (stored in bits 8 - 15) 45*0b57cec5SDimitry Andric TB_ALIGN_SHIFT = 8, 46*0b57cec5SDimitry Andric TB_ALIGN_NONE = 0 << TB_ALIGN_SHIFT, 47*0b57cec5SDimitry Andric TB_ALIGN_16 = 16 << TB_ALIGN_SHIFT, 48*0b57cec5SDimitry Andric TB_ALIGN_32 = 32 << TB_ALIGN_SHIFT, 49*0b57cec5SDimitry Andric TB_ALIGN_64 = 64 << TB_ALIGN_SHIFT, 50*0b57cec5SDimitry Andric TB_ALIGN_MASK = 0xff << TB_ALIGN_SHIFT 51*0b57cec5SDimitry Andric }; 52*0b57cec5SDimitry Andric 53*0b57cec5SDimitry Andric // This struct is used for both the folding and unfold tables. They KeyOp 54*0b57cec5SDimitry Andric // is used to determine the sorting order. 55*0b57cec5SDimitry Andric struct X86MemoryFoldTableEntry { 56*0b57cec5SDimitry Andric uint16_t KeyOp; 57*0b57cec5SDimitry Andric uint16_t DstOp; 58*0b57cec5SDimitry Andric uint16_t Flags; 59*0b57cec5SDimitry Andric 60*0b57cec5SDimitry Andric bool operator<(const X86MemoryFoldTableEntry &RHS) const { 61*0b57cec5SDimitry Andric return KeyOp < RHS.KeyOp; 62*0b57cec5SDimitry Andric } 63*0b57cec5SDimitry Andric bool operator==(const X86MemoryFoldTableEntry &RHS) const { 64*0b57cec5SDimitry Andric return KeyOp == RHS.KeyOp; 65*0b57cec5SDimitry Andric } 66*0b57cec5SDimitry Andric friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) { 67*0b57cec5SDimitry Andric return TE.KeyOp < Opcode; 68*0b57cec5SDimitry Andric } 69*0b57cec5SDimitry Andric }; 70*0b57cec5SDimitry Andric 71*0b57cec5SDimitry Andric // Look up the memory folding table entry for folding a load and a store into 72*0b57cec5SDimitry Andric // operand 0. 73*0b57cec5SDimitry Andric const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp); 74*0b57cec5SDimitry Andric 75*0b57cec5SDimitry Andric // Look up the memory folding table entry for folding a load or store with 76*0b57cec5SDimitry Andric // operand OpNum. 77*0b57cec5SDimitry Andric const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum); 78*0b57cec5SDimitry Andric 79*0b57cec5SDimitry Andric // Look up the memory unfolding table entry for this instruction. 80*0b57cec5SDimitry Andric const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp); 81*0b57cec5SDimitry Andric 82*0b57cec5SDimitry Andric } // namespace llvm 83*0b57cec5SDimitry Andric 84*0b57cec5SDimitry Andric #endif 85