/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Target/X86/X86InstrFMA3Info.cpp
Line | Count | Source |
1 | | //===-- X86InstrFMA3Info.cpp - X86 FMA3 Instruction Information -----------===// |
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-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This file contains the implementation of the classes providing information |
10 | | // about existing X86 FMA3 opcodes, classifying and grouping them. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #include "X86InstrFMA3Info.h" |
15 | | #include "X86InstrInfo.h" |
16 | | #include "llvm/Support/ManagedStatic.h" |
17 | | #include "llvm/Support/Threading.h" |
18 | | #include <cassert> |
19 | | #include <cstdint> |
20 | | |
21 | | using namespace llvm; |
22 | | |
23 | | #define FMA3GROUP(Name, Suf, Attrs) \ |
24 | | { { X86::Name##132##Suf, X86::Name##213##Suf, X86::Name##231##Suf }, Attrs }, |
25 | | |
26 | | #define FMA3GROUP_MASKED(Name, Suf, Attrs) \ |
27 | | FMA3GROUP(Name, Suf, Attrs) \ |
28 | | FMA3GROUP(Name, Suf##k, Attrs | X86InstrFMA3Group::KMergeMasked) \ |
29 | | FMA3GROUP(Name, Suf##kz, Attrs | X86InstrFMA3Group::KZeroMasked) |
30 | | |
31 | | #define FMA3GROUP_PACKED_WIDTHS(Name, Suf, Attrs) \ |
32 | | FMA3GROUP(Name, Suf##Ym, Attrs) \ |
33 | | FMA3GROUP(Name, Suf##Yr, Attrs) \ |
34 | | FMA3GROUP_MASKED(Name, Suf##Z128m, Attrs) \ |
35 | | FMA3GROUP_MASKED(Name, Suf##Z128r, Attrs) \ |
36 | | FMA3GROUP_MASKED(Name, Suf##Z256m, Attrs) \ |
37 | | FMA3GROUP_MASKED(Name, Suf##Z256r, Attrs) \ |
38 | | FMA3GROUP_MASKED(Name, Suf##Zm, Attrs) \ |
39 | | FMA3GROUP_MASKED(Name, Suf##Zr, Attrs) \ |
40 | | FMA3GROUP(Name, Suf##m, Attrs) \ |
41 | | FMA3GROUP(Name, Suf##r, Attrs) |
42 | | |
43 | | #define FMA3GROUP_PACKED(Name, Attrs) \ |
44 | | FMA3GROUP_PACKED_WIDTHS(Name, PD, Attrs) \ |
45 | | FMA3GROUP_PACKED_WIDTHS(Name, PS, Attrs) |
46 | | |
47 | | #define FMA3GROUP_SCALAR_WIDTHS(Name, Suf, Attrs) \ |
48 | | FMA3GROUP(Name, Suf##Zm, Attrs) \ |
49 | | FMA3GROUP_MASKED(Name, Suf##Zm_Int, Attrs | X86InstrFMA3Group::Intrinsic) \ |
50 | | FMA3GROUP(Name, Suf##Zr, Attrs) \ |
51 | | FMA3GROUP_MASKED(Name, Suf##Zr_Int, Attrs | X86InstrFMA3Group::Intrinsic) \ |
52 | | FMA3GROUP(Name, Suf##m, Attrs) \ |
53 | | FMA3GROUP(Name, Suf##m_Int, Attrs | X86InstrFMA3Group::Intrinsic) \ |
54 | | FMA3GROUP(Name, Suf##r, Attrs) \ |
55 | | FMA3GROUP(Name, Suf##r_Int, Attrs | X86InstrFMA3Group::Intrinsic) |
56 | | |
57 | | #define FMA3GROUP_SCALAR(Name, Attrs) \ |
58 | | FMA3GROUP_SCALAR_WIDTHS(Name, SD, Attrs) \ |
59 | | FMA3GROUP_SCALAR_WIDTHS(Name, SS, Attrs) |
60 | | |
61 | | #define FMA3GROUP_FULL(Name, Attrs) \ |
62 | | FMA3GROUP_PACKED(Name, Attrs) \ |
63 | | FMA3GROUP_SCALAR(Name, Attrs) |
64 | | |
65 | | static const X86InstrFMA3Group Groups[] = { |
66 | | FMA3GROUP_FULL(VFMADD, 0) |
67 | | FMA3GROUP_PACKED(VFMADDSUB, 0) |
68 | | FMA3GROUP_FULL(VFMSUB, 0) |
69 | | FMA3GROUP_PACKED(VFMSUBADD, 0) |
70 | | FMA3GROUP_FULL(VFNMADD, 0) |
71 | | FMA3GROUP_FULL(VFNMSUB, 0) |
72 | | }; |
73 | | |
74 | | #define FMA3GROUP_PACKED_AVX512_WIDTHS(Name, Type, Suf, Attrs) \ |
75 | | FMA3GROUP_MASKED(Name, Type##Z128##Suf, Attrs) \ |
76 | | FMA3GROUP_MASKED(Name, Type##Z256##Suf, Attrs) \ |
77 | | FMA3GROUP_MASKED(Name, Type##Z##Suf, Attrs) |
78 | | |
79 | | #define FMA3GROUP_PACKED_AVX512(Name, Suf, Attrs) \ |
80 | | FMA3GROUP_PACKED_AVX512_WIDTHS(Name, PD, Suf, Attrs) \ |
81 | | FMA3GROUP_PACKED_AVX512_WIDTHS(Name, PS, Suf, Attrs) |
82 | | |
83 | | #define FMA3GROUP_PACKED_AVX512_ROUND(Name, Suf, Attrs) \ |
84 | | FMA3GROUP_MASKED(Name, PDZ##Suf, Attrs) \ |
85 | | FMA3GROUP_MASKED(Name, PSZ##Suf, Attrs) |
86 | | |
87 | | #define FMA3GROUP_SCALAR_AVX512_ROUND(Name, Suf, Attrs) \ |
88 | | FMA3GROUP(Name, SDZ##Suf, Attrs) \ |
89 | | FMA3GROUP_MASKED(Name, SDZ##Suf##_Int, Attrs) \ |
90 | | FMA3GROUP(Name, SSZ##Suf, Attrs) \ |
91 | | FMA3GROUP_MASKED(Name, SSZ##Suf##_Int, Attrs) |
92 | | |
93 | | static const X86InstrFMA3Group BroadcastGroups[] = { |
94 | | FMA3GROUP_PACKED_AVX512(VFMADD, mb, 0) |
95 | | FMA3GROUP_PACKED_AVX512(VFMADDSUB, mb, 0) |
96 | | FMA3GROUP_PACKED_AVX512(VFMSUB, mb, 0) |
97 | | FMA3GROUP_PACKED_AVX512(VFMSUBADD, mb, 0) |
98 | | FMA3GROUP_PACKED_AVX512(VFNMADD, mb, 0) |
99 | | FMA3GROUP_PACKED_AVX512(VFNMSUB, mb, 0) |
100 | | }; |
101 | | |
102 | | static const X86InstrFMA3Group RoundGroups[] = { |
103 | | FMA3GROUP_PACKED_AVX512_ROUND(VFMADD, rb, 0) |
104 | | FMA3GROUP_SCALAR_AVX512_ROUND(VFMADD, rb, X86InstrFMA3Group::Intrinsic) |
105 | | FMA3GROUP_PACKED_AVX512_ROUND(VFMADDSUB, rb, 0) |
106 | | FMA3GROUP_PACKED_AVX512_ROUND(VFMSUB, rb, 0) |
107 | | FMA3GROUP_SCALAR_AVX512_ROUND(VFMSUB, rb, X86InstrFMA3Group::Intrinsic) |
108 | | FMA3GROUP_PACKED_AVX512_ROUND(VFMSUBADD, rb, 0) |
109 | | FMA3GROUP_PACKED_AVX512_ROUND(VFNMADD, rb, 0) |
110 | | FMA3GROUP_SCALAR_AVX512_ROUND(VFNMADD, rb, X86InstrFMA3Group::Intrinsic) |
111 | | FMA3GROUP_PACKED_AVX512_ROUND(VFNMSUB, rb, 0) |
112 | | FMA3GROUP_SCALAR_AVX512_ROUND(VFNMSUB, rb, X86InstrFMA3Group::Intrinsic) |
113 | | }; |
114 | | |
115 | 20.5k | static void verifyTables() { |
116 | | #ifndef NDEBUG |
117 | | static std::atomic<bool> TableChecked(false); |
118 | | if (!TableChecked.load(std::memory_order_relaxed)) { |
119 | | assert(std::is_sorted(std::begin(Groups), std::end(Groups)) && |
120 | | std::is_sorted(std::begin(RoundGroups), std::end(RoundGroups)) && |
121 | | std::is_sorted(std::begin(BroadcastGroups), |
122 | | std::end(BroadcastGroups)) && |
123 | | "FMA3 tables not sorted!"); |
124 | | TableChecked.store(true, std::memory_order_relaxed); |
125 | | } |
126 | | #endif |
127 | | } |
128 | | |
129 | | /// Returns a reference to a group of FMA3 opcodes to where the given |
130 | | /// \p Opcode is included. If the given \p Opcode is not recognized as FMA3 |
131 | | /// and not included into any FMA3 group, then nullptr is returned. |
132 | 922k | const X86InstrFMA3Group *llvm::getFMA3Group(unsigned Opcode, uint64_t TSFlags) { |
133 | 922k | |
134 | 922k | // FMA3 instructions have a well defined encoding pattern we can exploit. |
135 | 922k | uint8_t BaseOpcode = X86II::getBaseOpcodeFor(TSFlags); |
136 | 922k | bool IsFMA3 = ((TSFlags & X86II::EncodingMask) == X86II::VEX || |
137 | 922k | (TSFlags & X86II::EncodingMask) == X86II::EVEX785k ) && |
138 | 922k | (TSFlags & X86II::OpMapMask) == X86II::T8228k && |
139 | 922k | (TSFlags & X86II::OpPrefixMask) == X86II::PD66.1k && |
140 | 922k | (58.9k (58.9k BaseOpcode >= 0x9658.9k && BaseOpcode <= 0x9F21.1k ) || |
141 | 58.9k | (53.2k BaseOpcode >= 0xA653.2k && BaseOpcode <= 0xAF15.4k ) || |
142 | 58.9k | (42.6k BaseOpcode >= 0xB642.6k && BaseOpcode <= 0xBF4.35k )); |
143 | 922k | if (!IsFMA3) |
144 | 902k | return nullptr; |
145 | 20.5k | |
146 | 20.5k | verifyTables(); |
147 | 20.5k | |
148 | 20.5k | ArrayRef<X86InstrFMA3Group> Table; |
149 | 20.5k | if (TSFlags & X86II::EVEX_RC) |
150 | 2.84k | Table = makeArrayRef(RoundGroups); |
151 | 17.7k | else if (TSFlags & X86II::EVEX_B) |
152 | 158 | Table = makeArrayRef(BroadcastGroups); |
153 | 17.5k | else |
154 | 17.5k | Table = makeArrayRef(Groups); |
155 | 20.5k | |
156 | 20.5k | // FMA 132 instructions have an opcode of 0x96-0x9F |
157 | 20.5k | // FMA 213 instructions have an opcode of 0xA6-0xAF |
158 | 20.5k | // FMA 231 instructions have an opcode of 0xB6-0xBF |
159 | 20.5k | unsigned FormIndex = ((BaseOpcode - 0x90) >> 4) & 0x3; |
160 | 20.5k | |
161 | 169k | auto I = partition_point(Table, [=](const X86InstrFMA3Group &Group) { |
162 | 169k | return Group.Opcodes[FormIndex] < Opcode; |
163 | 169k | }); |
164 | 20.5k | assert(I != Table.end() && I->Opcodes[FormIndex] == Opcode && |
165 | 20.5k | "Couldn't find FMA3 opcode!"); |
166 | 20.5k | return I; |
167 | 20.5k | } |