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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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 #if V8_TARGET_ARCH_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
6 | 6 |
7 #include "src/bootstrapper.h" | 7 #include "src/bootstrapper.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/ic/handler-compiler.h" | 10 #include "src/ic/handler-compiler.h" |
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4035 __ Ldrb(scratch1, MemOperand(left, index)); | 4035 __ Ldrb(scratch1, MemOperand(left, index)); |
4036 __ Ldrb(scratch2, MemOperand(right, index)); | 4036 __ Ldrb(scratch2, MemOperand(right, index)); |
4037 __ Cmp(scratch1, scratch2); | 4037 __ Cmp(scratch1, scratch2); |
4038 __ B(ne, chars_not_equal); | 4038 __ B(ne, chars_not_equal); |
4039 __ Add(index, index, 1); | 4039 __ Add(index, index, 1); |
4040 __ Cbnz(index, &loop); | 4040 __ Cbnz(index, &loop); |
4041 } | 4041 } |
4042 | 4042 |
4043 | 4043 |
4044 void StringCompareStub::Generate(MacroAssembler* masm) { | 4044 void StringCompareStub::Generate(MacroAssembler* masm) { |
4045 Label runtime; | 4045 // ----------- S t a t e ------------- |
4046 | 4046 // -- x1 : left |
4047 Counters* counters = isolate()->counters(); | 4047 // -- x0 : right |
4048 | 4048 // -- lr : return address |
4049 // Stack frame on entry. | 4049 // ----------------------------------- |
4050 // sp[0]: right string | 4050 __ AssertString(x1); |
4051 // sp[8]: left string | 4051 __ AssertString(x0); |
4052 Register right = x10; | |
4053 Register left = x11; | |
4054 Register result = x0; | |
4055 __ Pop(right, left); | |
4056 | 4052 |
4057 Label not_same; | 4053 Label not_same; |
4058 __ Subs(result, right, left); | 4054 __ Cmp(x0, x1); |
4059 __ B(ne, ¬_same); | 4055 __ B(ne, ¬_same); |
4060 STATIC_ASSERT(EQUAL == 0); | 4056 __ Mov(x0, Smi::FromInt(EQUAL)); |
4061 __ IncrementCounter(counters->string_compare_native(), 1, x3, x4); | 4057 __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x3, |
| 4058 x4); |
4062 __ Ret(); | 4059 __ Ret(); |
4063 | 4060 |
4064 __ Bind(¬_same); | 4061 __ Bind(¬_same); |
4065 | 4062 |
4066 // Check that both objects are sequential one-byte strings. | 4063 // Check that both objects are sequential one-byte strings. |
4067 __ JumpIfEitherIsNotSequentialOneByteStrings(left, right, x12, x13, &runtime); | 4064 Label runtime; |
| 4065 __ JumpIfEitherIsNotSequentialOneByteStrings(x1, x0, x12, x13, &runtime); |
4068 | 4066 |
4069 // Compare flat one-byte strings natively. Remove arguments from stack first, | 4067 // Compare flat one-byte strings natively. |
4070 // as this function will generate a return. | 4068 __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x3, |
4071 __ IncrementCounter(counters->string_compare_native(), 1, x3, x4); | 4069 x4); |
4072 StringHelper::GenerateCompareFlatOneByteStrings(masm, left, right, x12, x13, | 4070 StringHelper::GenerateCompareFlatOneByteStrings(masm, x1, x0, x12, x13, x14, |
4073 x14, x15); | 4071 x15); |
4074 | |
4075 __ Bind(&runtime); | |
4076 | |
4077 // Push arguments back on to the stack. | |
4078 // sp[0] = right string | |
4079 // sp[8] = left string. | |
4080 __ Push(left, right); | |
4081 | 4072 |
4082 // Call the runtime. | 4073 // Call the runtime. |
4083 // Returns -1 (less), 0 (equal), or 1 (greater) tagged as a small integer. | 4074 // Returns -1 (less), 0 (equal), or 1 (greater) tagged as a small integer. |
| 4075 __ Bind(&runtime); |
| 4076 __ Push(x1, x0); |
4084 __ TailCallRuntime(Runtime::kStringCompare, 2, 1); | 4077 __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
4085 } | 4078 } |
4086 | 4079 |
4087 | 4080 |
4088 void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { | 4081 void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
4089 // ----------- S t a t e ------------- | 4082 // ----------- S t a t e ------------- |
4090 // -- x1 : left | 4083 // -- x1 : left |
4091 // -- x0 : right | 4084 // -- x0 : right |
4092 // -- lr : return address | 4085 // -- lr : return address |
4093 // ----------------------------------- | 4086 // ----------------------------------- |
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5984 MemOperand(fp, 6 * kPointerSize), NULL); | 5977 MemOperand(fp, 6 * kPointerSize), NULL); |
5985 } | 5978 } |
5986 | 5979 |
5987 | 5980 |
5988 #undef __ | 5981 #undef __ |
5989 | 5982 |
5990 } // namespace internal | 5983 } // namespace internal |
5991 } // namespace v8 | 5984 } // namespace v8 |
5992 | 5985 |
5993 #endif // V8_TARGET_ARCH_ARM64 | 5986 #endif // V8_TARGET_ARCH_ARM64 |
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