1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef RISCV64_TO_X86_64_BERBERIS_INTRINSICS_MACRO_ASSEMBLER_BITMANIP_IMPL_H_
18 #define RISCV64_TO_X86_64_BERBERIS_INTRINSICS_MACRO_ASSEMBLER_BITMANIP_IMPL_H_
19
20 #include <climits>
21
22 #include "berberis/base/bit_util.h"
23 #include "berberis/intrinsics/macro_assembler.h"
24
25 namespace berberis {
26
27 template <typename Assembler>
28 template <typename IntType>
MacroClz(Register result,Register src)29 void MacroAssembler<Assembler>::MacroClz(Register result, Register src) {
30 Bsr<IntType>(result, src);
31 Cmov<IntType>(Condition::kZero, result, {.disp = constants_pool::kBsrToClz<IntType>});
32 Xor<IntType>(result, sizeof(IntType) * CHAR_BIT - 1);
33 }
34
35 template <typename Assembler>
36 template <typename IntType>
MacroCtz(Register result,Register src)37 void MacroAssembler<Assembler>::MacroCtz(Register result, Register src) {
38 Bsf<IntType>(result, src);
39 Cmov<IntType>(Condition::kZero, result, {.disp = constants_pool::kWidthInBits<IntType>});
40 }
41
42 template <typename Assembler>
43 template <typename IntType>
MacroMax(Register result,Register src1,Register src2)44 void MacroAssembler<Assembler>::MacroMax(Register result, Register src1, Register src2) {
45 Mov<IntType>(result, src1);
46 Cmp<IntType>(src1, src2);
47 if constexpr (std::is_signed_v<IntType>) {
48 Cmov<IntType>(Condition::kLess, result, src2);
49 } else {
50 Cmov<IntType>(Condition::kBelow, result, src2);
51 }
52 }
53
54 template <typename Assembler>
55 template <typename IntType>
MacroMin(Register result,Register src1,Register src2)56 void MacroAssembler<Assembler>::MacroMin(Register result, Register src1, Register src2) {
57 Mov<IntType>(result, src1);
58 Cmp<IntType>(src1, src2);
59 if constexpr (std::is_signed_v<IntType>) {
60 Cmov<IntType>(Condition::kGreater, result, src2);
61 } else {
62 Cmov<IntType>(Condition::kAbove, result, src2);
63 }
64 }
65
66 template <typename Assembler>
MacroOrcb(XMMRegister result)67 void MacroAssembler<Assembler>::MacroOrcb(XMMRegister result) {
68 Pcmpeqb(result, {.disp = constants_pool::kVectorConst<uint8_t{0}>});
69 PNot(result);
70 }
71
72 template <typename Assembler>
MacroOrcbAVX(XMMRegister result,XMMRegister src)73 void MacroAssembler<Assembler>::MacroOrcbAVX(XMMRegister result, XMMRegister src) {
74 Vpcmpeqb(result, src, {.disp = constants_pool::kVectorConst<uint8_t{0}>});
75 Vpnot(result, result);
76 }
77
78 template <typename Assembler>
MacroAdduw(Register result,Register src)79 void MacroAssembler<Assembler>::MacroAdduw(Register result, Register src) {
80 Movl(result, result);
81 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesOne});
82 }
83
84 template <typename Assembler>
MacroSh1adduw(Register result,Register src)85 void MacroAssembler<Assembler>::MacroSh1adduw(Register result, Register src) {
86 Movl(result, result);
87 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesTwo});
88 }
89
90 template <typename Assembler>
MacroSh2adduw(Register result,Register src)91 void MacroAssembler<Assembler>::MacroSh2adduw(Register result, Register src) {
92 Movl(result, result);
93 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesFour});
94 }
95
96 template <typename Assembler>
MacroSh3adduw(Register result,Register src)97 void MacroAssembler<Assembler>::MacroSh3adduw(Register result, Register src) {
98 Movl(result, result);
99 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesEight});
100 }
101
102 template <typename Assembler>
MacroSh1add(Register result,Register src)103 void MacroAssembler<Assembler>::MacroSh1add(Register result, Register src) {
104 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesTwo});
105 }
106
107 template <typename Assembler>
MacroSh2add(Register result,Register src)108 void MacroAssembler<Assembler>::MacroSh2add(Register result, Register src) {
109 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesFour});
110 }
111
112 template <typename Assembler>
MacroSh3add(Register result,Register src)113 void MacroAssembler<Assembler>::MacroSh3add(Register result, Register src) {
114 Leaq(result, {.base = src, .index = result, .scale = Assembler::kTimesEight});
115 }
116
117 template <typename Assembler>
MacroBext(Register result,Register src1,Register src2)118 void MacroAssembler<Assembler>::MacroBext(Register result, Register src1, Register src2) {
119 Btq(src1, src2);
120 Movl(result, 0);
121 Setcc(Condition::kCarry, result);
122 }
123
124 } // namespace berberis
125
126 #endif // RISCV64_TO_X86_64_BERBERIS_INTRINSICS_MACRO_ASSEMBLER_BITMANIP_IMPL_H_
127