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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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3183 | 3183 |
3184 // Copy bytes in word size chunks. | 3184 // Copy bytes in word size chunks. |
3185 bind(&word_loop); | 3185 bind(&word_loop); |
3186 if (emit_debug_code()) { | 3186 if (emit_debug_code()) { |
3187 tst(src, Operand(kPointerSize - 1)); | 3187 tst(src, Operand(kPointerSize - 1)); |
3188 Assert(eq, "Expecting alignment for CopyBytes"); | 3188 Assert(eq, "Expecting alignment for CopyBytes"); |
3189 } | 3189 } |
3190 cmp(length, Operand(kPointerSize)); | 3190 cmp(length, Operand(kPointerSize)); |
3191 b(lt, &byte_loop); | 3191 b(lt, &byte_loop); |
3192 ldr(scratch, MemOperand(src, kPointerSize, PostIndex)); | 3192 ldr(scratch, MemOperand(src, kPointerSize, PostIndex)); |
3193 #if CAN_USE_UNALIGNED_ACCESSES | 3193 if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) { |
3194 str(scratch, MemOperand(dst, kPointerSize, PostIndex)); | 3194 str(scratch, MemOperand(dst, kPointerSize, PostIndex)); |
3195 #else | 3195 } else { |
3196 strb(scratch, MemOperand(dst, 1, PostIndex)); | 3196 strb(scratch, MemOperand(dst, 1, PostIndex)); |
3197 mov(scratch, Operand(scratch, LSR, 8)); | 3197 mov(scratch, Operand(scratch, LSR, 8)); |
3198 strb(scratch, MemOperand(dst, 1, PostIndex)); | 3198 strb(scratch, MemOperand(dst, 1, PostIndex)); |
3199 mov(scratch, Operand(scratch, LSR, 8)); | 3199 mov(scratch, Operand(scratch, LSR, 8)); |
3200 strb(scratch, MemOperand(dst, 1, PostIndex)); | 3200 strb(scratch, MemOperand(dst, 1, PostIndex)); |
3201 mov(scratch, Operand(scratch, LSR, 8)); | 3201 mov(scratch, Operand(scratch, LSR, 8)); |
3202 strb(scratch, MemOperand(dst, 1, PostIndex)); | 3202 strb(scratch, MemOperand(dst, 1, PostIndex)); |
3203 #endif | 3203 } |
3204 sub(length, length, Operand(kPointerSize)); | 3204 sub(length, length, Operand(kPointerSize)); |
3205 b(&word_loop); | 3205 b(&word_loop); |
3206 | 3206 |
3207 // Copy the last bytes if any left. | 3207 // Copy the last bytes if any left. |
3208 bind(&byte_loop); | 3208 bind(&byte_loop); |
3209 cmp(length, Operand(0)); | 3209 cmp(length, Operand(0)); |
3210 b(eq, &done); | 3210 b(eq, &done); |
3211 bind(&byte_loop_1); | 3211 bind(&byte_loop_1); |
3212 ldrb(scratch, MemOperand(src, 1, PostIndex)); | 3212 ldrb(scratch, MemOperand(src, 1, PostIndex)); |
3213 strb(scratch, MemOperand(dst, 1, PostIndex)); | 3213 strb(scratch, MemOperand(dst, 1, PostIndex)); |
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3839 void CodePatcher::EmitCondition(Condition cond) { | 3839 void CodePatcher::EmitCondition(Condition cond) { |
3840 Instr instr = Assembler::instr_at(masm_.pc_); | 3840 Instr instr = Assembler::instr_at(masm_.pc_); |
3841 instr = (instr & ~kCondMask) | cond; | 3841 instr = (instr & ~kCondMask) | cond; |
3842 masm_.emit(instr); | 3842 masm_.emit(instr); |
3843 } | 3843 } |
3844 | 3844 |
3845 | 3845 |
3846 } } // namespace v8::internal | 3846 } } // namespace v8::internal |
3847 | 3847 |
3848 #endif // V8_TARGET_ARCH_ARM | 3848 #endif // V8_TARGET_ARCH_ARM |
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