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102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===- X86InstrFMA3Info.h - X86 FMA3 Instruction Information ----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the implementation of the classes providing information
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// about existing X86 FMA3 opcodes, classifying and grouping them.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H
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#define LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H
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#include "X86.h"
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#include "llvm/ADT/DenseMap.h"
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#include <cassert>
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#include <cstdint>
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#include <set>
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namespace llvm {
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/// This class is used to group {132, 213, 231} forms of FMA opcodes together.
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/// Each of the groups has either 3 opcodes, Also, each group has an attributes
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/// field describing it.
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struct X86InstrFMA3Group {
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/// An array holding 3 forms of FMA opcodes.
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uint16_t Opcodes[3];
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/// This bitfield specifies the attributes associated with the created
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/// FMA groups of opcodes.
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uint16_t Attributes;
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enum {
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Form132,
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Form213,
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Form231,
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};
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enum : uint16_t {
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/// This bit must be set in the 'Attributes' field of FMA group if such
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/// group of FMA opcodes consists of FMA intrinsic opcodes.
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Intrinsic = 0x1,
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/// This bit must be set in the 'Attributes' field of FMA group if such
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/// group of FMA opcodes consists of AVX512 opcodes accepting a k-mask and
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/// passing the elements from the 1st operand to the result of the operation
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/// when the correpondings bits in the k-mask are unset.
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KMergeMasked = 0x2,
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/// This bit must be set in the 'Attributes' field of FMA group if such
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/// group of FMA opcodes consists of AVX512 opcodes accepting a k-zeromask.
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KZeroMasked = 0x4,
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};
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/// Returns the 132 form of FMA opcode.
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unsigned get132Opcode() const {
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return Opcodes[Form132];
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}
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/// Returns the 213 form of FMA opcode.
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unsigned get213Opcode() const {
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return Opcodes[Form213];
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}
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/// Returns the 231 form of FMA opcode.
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unsigned get231Opcode() const {
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return Opcodes[Form231];
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}
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/// Returns true iff the group of FMA opcodes holds intrinsic opcodes.
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bool isIntrinsic() const { return (Attributes & Intrinsic) != 0; }
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/// Returns true iff the group of FMA opcodes holds k-merge-masked opcodes.
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bool isKMergeMasked() const {
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return (Attributes & KMergeMasked) != 0;
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}
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/// Returns true iff the group of FMA opcodes holds k-zero-masked opcodes.
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bool isKZeroMasked() const { return (Attributes &KZeroMasked) != 0; }
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/// Returns true iff the group of FMA opcodes holds any of k-masked opcodes.
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bool isKMasked() const {
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return (Attributes & (KMergeMasked | KZeroMasked)) != 0;
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}
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bool operator<(const X86InstrFMA3Group &RHS) const {
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return Opcodes[0] < RHS.Opcodes[0];
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}
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};
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/// Returns a reference to a group of FMA3 opcodes to where the given
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/// \p Opcode is included. If the given \p Opcode is not recognized as FMA3
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/// and not included into any FMA3 group, then nullptr is returned.
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const X86InstrFMA3Group *getFMA3Group(unsigned Opcode, uint64_t TSFlags);
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_X86_UTILS_X86INSTRFMA3INFO_H
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