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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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5943 // Fill the fields of the cons string. | 5943 // Fill the fields of the cons string. |
5944 __ str(r0, FieldMemOperand(r7, ConsString::kFirstOffset)); | 5944 __ str(r0, FieldMemOperand(r7, ConsString::kFirstOffset)); |
5945 __ str(r1, FieldMemOperand(r7, ConsString::kSecondOffset)); | 5945 __ str(r1, FieldMemOperand(r7, ConsString::kSecondOffset)); |
5946 __ mov(r0, Operand(r7)); | 5946 __ mov(r0, Operand(r7)); |
5947 __ IncrementCounter(counters->string_add_native(), 1, r2, r3); | 5947 __ IncrementCounter(counters->string_add_native(), 1, r2, r3); |
5948 __ add(sp, sp, Operand(2 * kPointerSize)); | 5948 __ add(sp, sp, Operand(2 * kPointerSize)); |
5949 __ Ret(); | 5949 __ Ret(); |
5950 | 5950 |
5951 __ bind(&non_ascii); | 5951 __ bind(&non_ascii); |
5952 // At least one of the strings is two-byte. Check whether it happens | 5952 // At least one of the strings is two-byte. Check whether it happens |
5953 // to contain only ASCII characters. | 5953 // to contain only one byte characters. |
5954 // r4: first instance type. | 5954 // r4: first instance type. |
5955 // r5: second instance type. | 5955 // r5: second instance type. |
5956 __ tst(r4, Operand(kAsciiDataHintMask)); | 5956 __ tst(r4, Operand(kOneByteDataHintMask)); |
5957 __ tst(r5, Operand(kAsciiDataHintMask), ne); | 5957 __ tst(r5, Operand(kOneByteDataHintMask), ne); |
5958 __ b(ne, &ascii_data); | 5958 __ b(ne, &ascii_data); |
5959 __ eor(r4, r4, Operand(r5)); | 5959 __ eor(r4, r4, Operand(r5)); |
5960 STATIC_ASSERT(kOneByteStringTag != 0 && kAsciiDataHintTag != 0); | 5960 STATIC_ASSERT(kOneByteStringTag != 0 && kOneByteDataHintTag != 0); |
5961 __ and_(r4, r4, Operand(kOneByteStringTag | kAsciiDataHintTag)); | 5961 __ and_(r4, r4, Operand(kOneByteStringTag | kOneByteDataHintTag)); |
5962 __ cmp(r4, Operand(kOneByteStringTag | kAsciiDataHintTag)); | 5962 __ cmp(r4, Operand(kOneByteStringTag | kOneByteDataHintTag)); |
5963 __ b(eq, &ascii_data); | 5963 __ b(eq, &ascii_data); |
5964 | 5964 |
5965 // Allocate a two byte cons string. | 5965 // Allocate a two byte cons string. |
5966 __ AllocateTwoByteConsString(r7, r6, r4, r5, &call_runtime); | 5966 __ AllocateTwoByteConsString(r7, r6, r4, r5, &call_runtime); |
5967 __ jmp(&allocated); | 5967 __ jmp(&allocated); |
5968 | 5968 |
5969 // We cannot encounter sliced strings or cons strings here since: | 5969 // We cannot encounter sliced strings or cons strings here since: |
5970 STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength); | 5970 STATIC_ASSERT(SlicedString::kMinLength >= ConsString::kMinLength); |
5971 // Handle creating a flat result from either external or sequential strings. | 5971 // Handle creating a flat result from either external or sequential strings. |
5972 // Locate the first characters' locations. | 5972 // Locate the first characters' locations. |
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7361 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); | 7361 __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); |
7362 } | 7362 } |
7363 } | 7363 } |
7364 | 7364 |
7365 | 7365 |
7366 #undef __ | 7366 #undef __ |
7367 | 7367 |
7368 } } // namespace v8::internal | 7368 } } // namespace v8::internal |
7369 | 7369 |
7370 #endif // V8_TARGET_ARCH_ARM | 7370 #endif // V8_TARGET_ARCH_ARM |
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