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Issue 2070813002: Revert of [builtins] Introduce proper Float64Exp operator. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 6 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/mips64/codegen-mips64.h" 5 #include "src/mips64/codegen-mips64.h"
6 6
7 #if V8_TARGET_ARCH_MIPS64 7 #if V8_TARGET_ARCH_MIPS64
8 8
9 #include "src/codegen.h" 9 #include "src/codegen.h"
10 #include "src/macro-assembler.h" 10 #include "src/macro-assembler.h"
11 #include "src/mips64/simulator-mips64.h" 11 #include "src/mips64/simulator-mips64.h"
12 12
13 namespace v8 { 13 namespace v8 {
14 namespace internal { 14 namespace internal {
15 15
16 16
17 #define __ masm. 17 #define __ masm.
18 18
19 19
20 #if defined(USE_SIMULATOR)
21 byte* fast_exp_mips_machine_code = nullptr;
22 double fast_exp_simulator(double x, Isolate* isolate) {
23 return Simulator::current(isolate)->CallFP(fast_exp_mips_machine_code, x, 0);
24 }
25 #endif
26
27
28 UnaryMathFunctionWithIsolate CreateExpFunction(Isolate* isolate) {
29 size_t actual_size;
30 byte* buffer =
31 static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true));
32 if (buffer == nullptr) return nullptr;
33 ExternalReference::InitializeMathExpData();
34
35 MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size),
36 CodeObjectRequired::kNo);
37
38 {
39 DoubleRegister input = f12;
40 DoubleRegister result = f0;
41 DoubleRegister double_scratch1 = f4;
42 DoubleRegister double_scratch2 = f6;
43 Register temp1 = a4;
44 Register temp2 = a5;
45 Register temp3 = a6;
46
47 __ MovFromFloatParameter(input);
48 __ Push(temp3, temp2, temp1);
49 MathExpGenerator::EmitMathExp(
50 &masm, input, result, double_scratch1, double_scratch2,
51 temp1, temp2, temp3);
52 __ Pop(temp3, temp2, temp1);
53 __ MovToFloatResult(result);
54 __ Ret();
55 }
56
57 CodeDesc desc;
58 masm.GetCode(&desc);
59 DCHECK(!RelocInfo::RequiresRelocation(desc));
60
61 Assembler::FlushICache(isolate, buffer, actual_size);
62 base::OS::ProtectCode(buffer, actual_size);
63
64 #if !defined(USE_SIMULATOR)
65 return FUNCTION_CAST<UnaryMathFunctionWithIsolate>(buffer);
66 #else
67 fast_exp_mips_machine_code = buffer;
68 return &fast_exp_simulator;
69 #endif
70 }
71
72
20 #if defined(V8_HOST_ARCH_MIPS) 73 #if defined(V8_HOST_ARCH_MIPS)
21 MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate, 74 MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate,
22 MemCopyUint8Function stub) { 75 MemCopyUint8Function stub) {
23 #if defined(USE_SIMULATOR) 76 #if defined(USE_SIMULATOR)
24 return stub; 77 return stub;
25 #else 78 #else
26 79
27 size_t actual_size; 80 size_t actual_size;
28 byte* buffer = 81 byte* buffer =
29 static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true)); 82 static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true));
(...skipping 1000 matching lines...) Expand 10 before | Expand all | Expand 10 after
1030 __ Dlsa(at, string, index, 1); 1083 __ Dlsa(at, string, index, 1);
1031 __ lhu(result, MemOperand(at)); 1084 __ lhu(result, MemOperand(at));
1032 __ jmp(&done); 1085 __ jmp(&done);
1033 __ bind(&one_byte); 1086 __ bind(&one_byte);
1034 // One_byte string. 1087 // One_byte string.
1035 __ Daddu(at, string, index); 1088 __ Daddu(at, string, index);
1036 __ lbu(result, MemOperand(at)); 1089 __ lbu(result, MemOperand(at));
1037 __ bind(&done); 1090 __ bind(&done);
1038 } 1091 }
1039 1092
1093
1094 static MemOperand ExpConstant(int index, Register base) {
1095 return MemOperand(base, index * kDoubleSize);
1096 }
1097
1098
1099 void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
1100 DoubleRegister input,
1101 DoubleRegister result,
1102 DoubleRegister double_scratch1,
1103 DoubleRegister double_scratch2,
1104 Register temp1,
1105 Register temp2,
1106 Register temp3) {
1107 DCHECK(!input.is(result));
1108 DCHECK(!input.is(double_scratch1));
1109 DCHECK(!input.is(double_scratch2));
1110 DCHECK(!result.is(double_scratch1));
1111 DCHECK(!result.is(double_scratch2));
1112 DCHECK(!double_scratch1.is(double_scratch2));
1113 DCHECK(!temp1.is(temp2));
1114 DCHECK(!temp1.is(temp3));
1115 DCHECK(!temp2.is(temp3));
1116 DCHECK(ExternalReference::math_exp_constants(0).address() != NULL);
1117 DCHECK(!masm->serializer_enabled()); // External references not serializable.
1118
1119 Label zero, infinity, done;
1120 __ li(temp3, Operand(ExternalReference::math_exp_constants(0)));
1121
1122 __ ldc1(double_scratch1, ExpConstant(0, temp3));
1123 __ BranchF(&zero, NULL, ge, double_scratch1, input);
1124
1125 __ ldc1(double_scratch2, ExpConstant(1, temp3));
1126 __ BranchF(&infinity, NULL, ge, input, double_scratch2);
1127
1128 __ ldc1(double_scratch1, ExpConstant(3, temp3));
1129 __ ldc1(result, ExpConstant(4, temp3));
1130 __ mul_d(double_scratch1, double_scratch1, input);
1131 __ add_d(double_scratch1, double_scratch1, result);
1132 __ FmoveLow(temp2, double_scratch1);
1133 __ sub_d(double_scratch1, double_scratch1, result);
1134 __ ldc1(result, ExpConstant(6, temp3));
1135 __ ldc1(double_scratch2, ExpConstant(5, temp3));
1136 __ mul_d(double_scratch1, double_scratch1, double_scratch2);
1137 __ sub_d(double_scratch1, double_scratch1, input);
1138 __ sub_d(result, result, double_scratch1);
1139 __ mul_d(double_scratch2, double_scratch1, double_scratch1);
1140 __ mul_d(result, result, double_scratch2);
1141 __ ldc1(double_scratch2, ExpConstant(7, temp3));
1142 __ mul_d(result, result, double_scratch2);
1143 __ sub_d(result, result, double_scratch1);
1144 // Mov 1 in double_scratch2 as math_exp_constants_array[8] == 1.
1145 DCHECK(*reinterpret_cast<double*>
1146 (ExternalReference::math_exp_constants(8).address()) == 1);
1147 __ Move(double_scratch2, 1.);
1148 __ add_d(result, result, double_scratch2);
1149 __ dsrl(temp1, temp2, 11);
1150 __ Ext(temp2, temp2, 0, 11);
1151 __ Daddu(temp1, temp1, Operand(0x3ff));
1152
1153 // Must not call ExpConstant() after overwriting temp3!
1154 __ li(temp3, Operand(ExternalReference::math_exp_log_table()));
1155 __ Dlsa(temp3, temp3, temp2, 3);
1156 __ lwu(temp2, MemOperand(temp3, Register::kMantissaOffset));
1157 __ lwu(temp3, MemOperand(temp3, Register::kExponentOffset));
1158 // The first word is loaded is the lower number register.
1159 if (temp2.code() < temp3.code()) {
1160 __ dsll(at, temp1, 20);
1161 __ Or(temp1, temp3, at);
1162 __ Move(double_scratch1, temp2, temp1);
1163 } else {
1164 __ dsll(at, temp1, 20);
1165 __ Or(temp1, temp2, at);
1166 __ Move(double_scratch1, temp3, temp1);
1167 }
1168 __ mul_d(result, result, double_scratch1);
1169 __ BranchShort(&done);
1170
1171 __ bind(&zero);
1172 __ Move(result, kDoubleRegZero);
1173 __ BranchShort(&done);
1174
1175 __ bind(&infinity);
1176 __ ldc1(result, ExpConstant(2, temp3));
1177
1178 __ bind(&done);
1179 }
1180
1040 #ifdef DEBUG 1181 #ifdef DEBUG
1041 // nop(CODE_AGE_MARKER_NOP) 1182 // nop(CODE_AGE_MARKER_NOP)
1042 static const uint32_t kCodeAgePatchFirstInstruction = 0x00010180; 1183 static const uint32_t kCodeAgePatchFirstInstruction = 0x00010180;
1043 #endif 1184 #endif
1044 1185
1045 1186
1046 CodeAgingHelper::CodeAgingHelper(Isolate* isolate) { 1187 CodeAgingHelper::CodeAgingHelper(Isolate* isolate) {
1047 USE(isolate); 1188 USE(isolate);
1048 DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength); 1189 DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength);
1049 // Since patcher is a large object, allocate it dynamically when needed, 1190 // Since patcher is a large object, allocate it dynamically when needed,
(...skipping 67 matching lines...) Expand 10 before | Expand all | Expand 10 after
1117 } 1258 }
1118 } 1259 }
1119 1260
1120 1261
1121 #undef __ 1262 #undef __
1122 1263
1123 } // namespace internal 1264 } // namespace internal
1124 } // namespace v8 1265 } // namespace v8
1125 1266
1126 #endif // V8_TARGET_ARCH_MIPS64 1267 #endif // V8_TARGET_ARCH_MIPS64
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