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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/mips/codegen-mips.h" | 5 #include "src/mips/codegen-mips.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_MIPS | 7 #if V8_TARGET_ARCH_MIPS |
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/mips/simulator-mips.h" | 11 #include "src/mips/simulator-mips.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 | |
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 = t0; | |
44 Register temp2 = t1; | |
45 Register temp3 = t2; | |
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 | |
73 #if defined(V8_HOST_ARCH_MIPS) | 19 #if defined(V8_HOST_ARCH_MIPS) |
74 MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate, | 20 MemCopyUint8Function CreateMemCopyUint8Function(Isolate* isolate, |
75 MemCopyUint8Function stub) { | 21 MemCopyUint8Function stub) { |
76 #if defined(USE_SIMULATOR) || defined(_MIPS_ARCH_MIPS32R6) || \ | 22 #if defined(USE_SIMULATOR) || defined(_MIPS_ARCH_MIPS32R6) || \ |
77 defined(_MIPS_ARCH_MIPS32RX) | 23 defined(_MIPS_ARCH_MIPS32RX) |
78 return stub; | 24 return stub; |
79 #else | 25 #else |
80 size_t actual_size; | 26 size_t actual_size; |
81 byte* buffer = | 27 byte* buffer = |
82 static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true)); | 28 static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true)); |
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1085 __ Lsa(at, string, index, 1); | 1031 __ Lsa(at, string, index, 1); |
1086 __ lhu(result, MemOperand(at)); | 1032 __ lhu(result, MemOperand(at)); |
1087 __ jmp(&done); | 1033 __ jmp(&done); |
1088 __ bind(&one_byte); | 1034 __ bind(&one_byte); |
1089 // One_byte string. | 1035 // One_byte string. |
1090 __ Addu(at, string, index); | 1036 __ Addu(at, string, index); |
1091 __ lbu(result, MemOperand(at)); | 1037 __ lbu(result, MemOperand(at)); |
1092 __ bind(&done); | 1038 __ bind(&done); |
1093 } | 1039 } |
1094 | 1040 |
1095 | |
1096 static MemOperand ExpConstant(int index, Register base) { | |
1097 return MemOperand(base, index * kDoubleSize); | |
1098 } | |
1099 | |
1100 | |
1101 void MathExpGenerator::EmitMathExp(MacroAssembler* masm, | |
1102 DoubleRegister input, | |
1103 DoubleRegister result, | |
1104 DoubleRegister double_scratch1, | |
1105 DoubleRegister double_scratch2, | |
1106 Register temp1, | |
1107 Register temp2, | |
1108 Register temp3) { | |
1109 DCHECK(!input.is(result)); | |
1110 DCHECK(!input.is(double_scratch1)); | |
1111 DCHECK(!input.is(double_scratch2)); | |
1112 DCHECK(!result.is(double_scratch1)); | |
1113 DCHECK(!result.is(double_scratch2)); | |
1114 DCHECK(!double_scratch1.is(double_scratch2)); | |
1115 DCHECK(!temp1.is(temp2)); | |
1116 DCHECK(!temp1.is(temp3)); | |
1117 DCHECK(!temp2.is(temp3)); | |
1118 DCHECK(ExternalReference::math_exp_constants(0).address() != NULL); | |
1119 DCHECK(!masm->serializer_enabled()); // External references not serializable. | |
1120 | |
1121 Label zero, infinity, done; | |
1122 | |
1123 __ li(temp3, Operand(ExternalReference::math_exp_constants(0))); | |
1124 | |
1125 __ ldc1(double_scratch1, ExpConstant(0, temp3)); | |
1126 __ BranchF(&zero, NULL, ge, double_scratch1, input); | |
1127 | |
1128 __ ldc1(double_scratch2, ExpConstant(1, temp3)); | |
1129 __ BranchF(&infinity, NULL, ge, input, double_scratch2); | |
1130 | |
1131 __ ldc1(double_scratch1, ExpConstant(3, temp3)); | |
1132 __ ldc1(result, ExpConstant(4, temp3)); | |
1133 __ mul_d(double_scratch1, double_scratch1, input); | |
1134 __ add_d(double_scratch1, double_scratch1, result); | |
1135 __ FmoveLow(temp2, double_scratch1); | |
1136 __ sub_d(double_scratch1, double_scratch1, result); | |
1137 __ ldc1(result, ExpConstant(6, temp3)); | |
1138 __ ldc1(double_scratch2, ExpConstant(5, temp3)); | |
1139 __ mul_d(double_scratch1, double_scratch1, double_scratch2); | |
1140 __ sub_d(double_scratch1, double_scratch1, input); | |
1141 __ sub_d(result, result, double_scratch1); | |
1142 __ mul_d(double_scratch2, double_scratch1, double_scratch1); | |
1143 __ mul_d(result, result, double_scratch2); | |
1144 __ ldc1(double_scratch2, ExpConstant(7, temp3)); | |
1145 __ mul_d(result, result, double_scratch2); | |
1146 __ sub_d(result, result, double_scratch1); | |
1147 // Mov 1 in double_scratch2 as math_exp_constants_array[8] == 1. | |
1148 DCHECK(*reinterpret_cast<double*> | |
1149 (ExternalReference::math_exp_constants(8).address()) == 1); | |
1150 __ Move(double_scratch2, 1.); | |
1151 __ add_d(result, result, double_scratch2); | |
1152 __ srl(temp1, temp2, 11); | |
1153 __ Ext(temp2, temp2, 0, 11); | |
1154 __ Addu(temp1, temp1, Operand(0x3ff)); | |
1155 | |
1156 // Must not call ExpConstant() after overwriting temp3! | |
1157 __ li(temp3, Operand(ExternalReference::math_exp_log_table())); | |
1158 __ Lsa(temp3, temp3, temp2, 3); | |
1159 __ lw(temp2, MemOperand(temp3, Register::kMantissaOffset)); | |
1160 __ lw(temp3, MemOperand(temp3, Register::kExponentOffset)); | |
1161 // The first word is loaded is the lower number register. | |
1162 if (temp2.code() < temp3.code()) { | |
1163 __ sll(at, temp1, 20); | |
1164 __ Or(temp1, temp3, at); | |
1165 __ Move(double_scratch1, temp2, temp1); | |
1166 } else { | |
1167 __ sll(at, temp1, 20); | |
1168 __ Or(temp1, temp2, at); | |
1169 __ Move(double_scratch1, temp3, temp1); | |
1170 } | |
1171 __ mul_d(result, result, double_scratch1); | |
1172 __ BranchShort(&done); | |
1173 | |
1174 __ bind(&zero); | |
1175 __ Move(result, kDoubleRegZero); | |
1176 __ BranchShort(&done); | |
1177 | |
1178 __ bind(&infinity); | |
1179 __ ldc1(result, ExpConstant(2, temp3)); | |
1180 | |
1181 __ bind(&done); | |
1182 } | |
1183 | |
1184 #ifdef DEBUG | 1041 #ifdef DEBUG |
1185 // nop(CODE_AGE_MARKER_NOP) | 1042 // nop(CODE_AGE_MARKER_NOP) |
1186 static const uint32_t kCodeAgePatchFirstInstruction = 0x00010180; | 1043 static const uint32_t kCodeAgePatchFirstInstruction = 0x00010180; |
1187 #endif | 1044 #endif |
1188 | 1045 |
1189 | 1046 |
1190 CodeAgingHelper::CodeAgingHelper(Isolate* isolate) { | 1047 CodeAgingHelper::CodeAgingHelper(Isolate* isolate) { |
1191 USE(isolate); | 1048 USE(isolate); |
1192 DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength); | 1049 DCHECK(young_sequence_.length() == kNoCodeAgeSequenceLength); |
1193 // Since patcher is a large object, allocate it dynamically when needed, | 1050 // Since patcher is a large object, allocate it dynamically when needed, |
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1259 } | 1116 } |
1260 } | 1117 } |
1261 | 1118 |
1262 | 1119 |
1263 #undef __ | 1120 #undef __ |
1264 | 1121 |
1265 } // namespace internal | 1122 } // namespace internal |
1266 } // namespace v8 | 1123 } // namespace v8 |
1267 | 1124 |
1268 #endif // V8_TARGET_ARCH_MIPS | 1125 #endif // V8_TARGET_ARCH_MIPS |
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