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8838161306
I separated out the rounding and broadcast groups into their own tables because it made the ordering in the main table easier. Further splitting of the tables might make it possible to directly index using bits from the TSFlags, but its probably not worth it right now. llvm-svn: 336075
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
//===- X86InstrFMA3Info.h - X86 FMA3 Instruction Information ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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