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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/v8.h" | 5 #include "src/v8.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" |
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941 __ And(at, result, Operand(kIsIndirectStringMask)); | 941 __ And(at, result, Operand(kIsIndirectStringMask)); |
942 __ Assert(eq, kExternalStringExpectedButNotFound, | 942 __ Assert(eq, kExternalStringExpectedButNotFound, |
943 at, Operand(zero_reg)); | 943 at, Operand(zero_reg)); |
944 } | 944 } |
945 // Rule out short external strings. | 945 // Rule out short external strings. |
946 STATIC_ASSERT(kShortExternalStringTag != 0); | 946 STATIC_ASSERT(kShortExternalStringTag != 0); |
947 __ And(at, result, Operand(kShortExternalStringMask)); | 947 __ And(at, result, Operand(kShortExternalStringMask)); |
948 __ Branch(call_runtime, ne, at, Operand(zero_reg)); | 948 __ Branch(call_runtime, ne, at, Operand(zero_reg)); |
949 __ ld(string, FieldMemOperand(string, ExternalString::kResourceDataOffset)); | 949 __ ld(string, FieldMemOperand(string, ExternalString::kResourceDataOffset)); |
950 | 950 |
951 Label ascii, done; | 951 Label one_byte, done; |
952 __ bind(&check_encoding); | 952 __ bind(&check_encoding); |
953 STATIC_ASSERT(kTwoByteStringTag == 0); | 953 STATIC_ASSERT(kTwoByteStringTag == 0); |
954 __ And(at, result, Operand(kStringEncodingMask)); | 954 __ And(at, result, Operand(kStringEncodingMask)); |
955 __ Branch(&ascii, ne, at, Operand(zero_reg)); | 955 __ Branch(&one_byte, ne, at, Operand(zero_reg)); |
956 // Two-byte string. | 956 // Two-byte string. |
957 __ dsll(at, index, 1); | 957 __ dsll(at, index, 1); |
958 __ Daddu(at, string, at); | 958 __ Daddu(at, string, at); |
959 __ lhu(result, MemOperand(at)); | 959 __ lhu(result, MemOperand(at)); |
960 __ jmp(&done); | 960 __ jmp(&done); |
961 __ bind(&ascii); | 961 __ bind(&one_byte); |
962 // Ascii string. | 962 // One_byte string. |
963 __ Daddu(at, string, index); | 963 __ Daddu(at, string, index); |
964 __ lbu(result, MemOperand(at)); | 964 __ lbu(result, MemOperand(at)); |
965 __ bind(&done); | 965 __ bind(&done); |
966 } | 966 } |
967 | 967 |
968 | 968 |
969 static MemOperand ExpConstant(int index, Register base) { | 969 static MemOperand ExpConstant(int index, Register base) { |
970 return MemOperand(base, index * kDoubleSize); | 970 return MemOperand(base, index * kDoubleSize); |
971 } | 971 } |
972 | 972 |
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1133 patcher.masm()->nop(); // Pad the empty space. | 1133 patcher.masm()->nop(); // Pad the empty space. |
1134 } | 1134 } |
1135 } | 1135 } |
1136 | 1136 |
1137 | 1137 |
1138 #undef __ | 1138 #undef __ |
1139 | 1139 |
1140 } } // namespace v8::internal | 1140 } } // namespace v8::internal |
1141 | 1141 |
1142 #endif // V8_TARGET_ARCH_MIPS64 | 1142 #endif // V8_TARGET_ARCH_MIPS64 |
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