| //===-- X86InstrFoldTables.h - X86 Instruction Folding Tables ---*- 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 the interface to query the X86 memory folding tables. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H |
| #define LLVM_LIB_TARGET_X86_X86INSTRFOLDTABLES_H |
| |
| #include <cstdint> |
| |
| namespace llvm { |
| |
| enum { |
| // Select which memory operand is being unfolded. |
| // (stored in bits 0 - 2) |
| TB_INDEX_0 = 0, |
| TB_INDEX_1 = 1, |
| TB_INDEX_2 = 2, |
| TB_INDEX_3 = 3, |
| TB_INDEX_4 = 4, |
| TB_INDEX_MASK = 0x7, |
| |
| // Do not insert the reverse map (MemOp -> RegOp) into the table. |
| // This may be needed because there is a many -> one mapping. |
| TB_NO_REVERSE = 1 << 3, |
| |
| // Do not insert the forward map (RegOp -> MemOp) into the table. |
| // This is needed for Native Client, which prohibits branch |
| // instructions from using a memory operand. |
| TB_NO_FORWARD = 1 << 4, |
| |
| TB_FOLDED_LOAD = 1 << 5, |
| TB_FOLDED_STORE = 1 << 6, |
| TB_FOLDED_BCAST = 1 << 7, |
| |
| // Minimum alignment required for load/store. |
| // Used for RegOp->MemOp conversion. Encoded as Log2(Align) + 1 to allow 0 |
| // to mean align of 0. |
| // (stored in bits 8 - 11) |
| TB_ALIGN_SHIFT = 8, |
| TB_ALIGN_NONE = 0 << TB_ALIGN_SHIFT, |
| TB_ALIGN_16 = 5 << TB_ALIGN_SHIFT, |
| TB_ALIGN_32 = 6 << TB_ALIGN_SHIFT, |
| TB_ALIGN_64 = 7 << TB_ALIGN_SHIFT, |
| TB_ALIGN_MASK = 0xf << TB_ALIGN_SHIFT, |
| |
| // Broadcast type. |
| // (stored in bits 12 - 13) |
| TB_BCAST_TYPE_SHIFT = 12, |
| TB_BCAST_D = 0 << TB_BCAST_TYPE_SHIFT, |
| TB_BCAST_Q = 1 << TB_BCAST_TYPE_SHIFT, |
| TB_BCAST_SS = 2 << TB_BCAST_TYPE_SHIFT, |
| TB_BCAST_SD = 3 << TB_BCAST_TYPE_SHIFT, |
| TB_BCAST_MASK = 0x3 << TB_BCAST_TYPE_SHIFT, |
| |
| // Unused bits 14-15 |
| }; |
| |
| // This struct is used for both the folding and unfold tables. They KeyOp |
| // is used to determine the sorting order. |
| struct X86MemoryFoldTableEntry { |
| uint16_t KeyOp; |
| uint16_t DstOp; |
| uint16_t Flags; |
| |
| bool operator<(const X86MemoryFoldTableEntry &RHS) const { |
| return KeyOp < RHS.KeyOp; |
| } |
| bool operator==(const X86MemoryFoldTableEntry &RHS) const { |
| return KeyOp == RHS.KeyOp; |
| } |
| friend bool operator<(const X86MemoryFoldTableEntry &TE, unsigned Opcode) { |
| return TE.KeyOp < Opcode; |
| } |
| }; |
| |
| // Look up the memory folding table entry for folding a load and a store into |
| // operand 0. |
| const X86MemoryFoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp); |
| |
| // Look up the memory folding table entry for folding a load or store with |
| // operand OpNum. |
| const X86MemoryFoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum); |
| |
| // Look up the memory unfolding table entry for this instruction. |
| const X86MemoryFoldTableEntry *lookupUnfoldTable(unsigned MemOp); |
| |
| } // namespace llvm |
| |
| #endif |