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1//===- X86InstrFMA3Info.h - X86 FMA3 Instruction Information ----*- 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-exception6//7//===----------------------------------------------------------------------===//8//9// This file contains the implementation of the classes providing information10// about existing X86 FMA3 opcodes, classifying and grouping them.11//12//===----------------------------------------------------------------------===//13 14#ifndef LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H15#define LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H16 17#include <cstdint>18 19namespace llvm {20 21/// This class is used to group {132, 213, 231} forms of FMA opcodes together.22/// Each of the groups has either 3 opcodes, Also, each group has an attributes23/// field describing it.24struct X86InstrFMA3Group {25 /// An array holding 3 forms of FMA opcodes.26 uint16_t Opcodes[3];27 28 /// This bitfield specifies the attributes associated with the created29 /// FMA groups of opcodes.30 uint16_t Attributes;31 32 enum {33 Form132,34 Form213,35 Form231,36 };37 38 enum : uint16_t {39 /// This bit must be set in the 'Attributes' field of FMA group if such40 /// group of FMA opcodes consists of FMA intrinsic opcodes.41 Intrinsic = 0x1,42 43 /// This bit must be set in the 'Attributes' field of FMA group if such44 /// group of FMA opcodes consists of AVX512 opcodes accepting a k-mask and45 /// passing the elements from the 1st operand to the result of the operation46 /// when the correpondings bits in the k-mask are unset.47 KMergeMasked = 0x2,48 49 /// This bit must be set in the 'Attributes' field of FMA group if such50 /// group of FMA opcodes consists of AVX512 opcodes accepting a k-zeromask.51 KZeroMasked = 0x4,52 };53 54 /// Returns the 132 form of FMA opcode.55 unsigned get132Opcode() const {56 return Opcodes[Form132];57 }58 59 /// Returns the 213 form of FMA opcode.60 unsigned get213Opcode() const {61 return Opcodes[Form213];62 }63 64 /// Returns the 231 form of FMA opcode.65 unsigned get231Opcode() const {66 return Opcodes[Form231];67 }68 69 /// Returns true iff the group of FMA opcodes holds intrinsic opcodes.70 bool isIntrinsic() const { return (Attributes & Intrinsic) != 0; }71 72 /// Returns true iff the group of FMA opcodes holds k-merge-masked opcodes.73 bool isKMergeMasked() const {74 return (Attributes & KMergeMasked) != 0;75 }76 77 /// Returns true iff the group of FMA opcodes holds k-zero-masked opcodes.78 bool isKZeroMasked() const { return (Attributes &KZeroMasked) != 0; }79 80 /// Returns true iff the group of FMA opcodes holds any of k-masked opcodes.81 bool isKMasked() const {82 return (Attributes & (KMergeMasked | KZeroMasked)) != 0;83 }84 85 bool operator<(const X86InstrFMA3Group &RHS) const {86 return Opcodes[0] < RHS.Opcodes[0];87 }88};89 90/// Returns a reference to a group of FMA3 opcodes to where the given91/// \p Opcode is included. If the given \p Opcode is not recognized as FMA392/// and not included into any FMA3 group, then nullptr is returned.93const X86InstrFMA3Group *getFMA3Group(unsigned Opcode, uint64_t TSFlags);94 95} // end namespace llvm96 97#endif // LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H98