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Issue 7122003: Make x64 to use the RecordWrite stub. This is a step towards getting (Closed) Base URL: http://v8.googlecode.com/svn/branches/experimental/gc/
Patch Set: '' Created 9 years, 6 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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3136 ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); 3136 ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
3137 } 3137 }
3138 3138
3139 3139
3140 void MacroAssembler::HasColor(Register object, 3140 void MacroAssembler::HasColor(Register object,
3141 Register bitmap_scratch, 3141 Register bitmap_scratch,
3142 Register mask_scratch, 3142 Register mask_scratch,
3143 Label* has_color, 3143 Label* has_color,
3144 int first_bit, 3144 int first_bit,
3145 int second_bit) { 3145 int second_bit) {
3146 ASSERT(!Aliasing(object, bitmap_scratch, mask_scratch, no_reg)); 3146 ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg));
3147 3147
3148 GetMarkBits(object, bitmap_scratch, mask_scratch); 3148 GetMarkBits(object, bitmap_scratch, mask_scratch);
3149 3149
3150 Label other_color, word_boundary; 3150 Label other_color, word_boundary;
3151 ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); 3151 ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
3152 tst(ip, Operand(mask_scratch)); 3152 tst(ip, Operand(mask_scratch));
3153 b(first_bit == 1 ? eq : ne, &other_color); 3153 b(first_bit == 1 ? eq : ne, &other_color);
3154 // Shift left 1 by adding. 3154 // Shift left 1 by adding.
3155 add(mask_scratch, mask_scratch, Operand(mask_scratch), SetCC); 3155 add(mask_scratch, mask_scratch, Operand(mask_scratch), SetCC);
3156 b(eq, &word_boundary); 3156 b(eq, &word_boundary);
3157 tst(ip, Operand(mask_scratch)); 3157 tst(ip, Operand(mask_scratch));
3158 b(second_bit == 1 ? ne : eq, has_color); 3158 b(second_bit == 1 ? ne : eq, has_color);
3159 jmp(&other_color); 3159 jmp(&other_color);
3160 3160
3161 bind(&word_boundary); 3161 bind(&word_boundary);
3162 ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize)); 3162 ldr(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize));
3163 tst(ip, Operand(1)); 3163 tst(ip, Operand(1));
3164 b(second_bit == 1 ? ne : eq, has_color); 3164 b(second_bit == 1 ? ne : eq, has_color);
3165 bind(&other_color); 3165 bind(&other_color);
3166 } 3166 }
3167 3167
3168 3168
3169 void MacroAssembler::GetMarkBits(Register addr_reg, 3169 void MacroAssembler::GetMarkBits(Register addr_reg,
3170 Register bitmap_reg, 3170 Register bitmap_reg,
3171 Register mask_reg) { 3171 Register mask_reg) {
3172 ASSERT(!Aliasing(addr_reg, bitmap_reg, mask_reg, no_reg)); 3172 ASSERT(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg));
3173 and_(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); 3173 and_(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask));
3174 Ubfx(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); 3174 Ubfx(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2);
3175 const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; 3175 const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2;
3176 Ubfx(ip, addr_reg, kLowBits, kPageSizeBits - kLowBits); 3176 Ubfx(ip, addr_reg, kLowBits, kPageSizeBits - kLowBits);
3177 add(bitmap_reg, bitmap_reg, Operand(ip, LSL, kPointerSizeLog2)); 3177 add(bitmap_reg, bitmap_reg, Operand(ip, LSL, kPointerSizeLog2));
3178 mov(ip, Operand(1)); 3178 mov(ip, Operand(1));
3179 mov(mask_reg, Operand(ip, LSL, mask_reg)); 3179 mov(mask_reg, Operand(ip, LSL, mask_reg));
3180 } 3180 }
3181 3181
3182 3182
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3222 Register descriptors) { 3222 Register descriptors) {
3223 ldr(descriptors, 3223 ldr(descriptors,
3224 FieldMemOperand(map, Map::kInstanceDescriptorsOrBitField3Offset)); 3224 FieldMemOperand(map, Map::kInstanceDescriptorsOrBitField3Offset));
3225 Label not_smi; 3225 Label not_smi;
3226 JumpIfNotSmi(descriptors, &not_smi); 3226 JumpIfNotSmi(descriptors, &not_smi);
3227 mov(descriptors, Operand(FACTORY->empty_descriptor_array())); 3227 mov(descriptors, Operand(FACTORY->empty_descriptor_array()));
3228 bind(&not_smi); 3228 bind(&not_smi);
3229 } 3229 }
3230 3230
3231 3231
3232 bool Aliasing(Register r1, Register r2, Register r3, Register r4) { 3232 bool AreAliased(Register r1, Register r2, Register r3, Register r4) {
3233 if (r1.is(r2)) return true; 3233 if (r1.is(r2)) return true;
3234 if (r1.is(r3)) return true; 3234 if (r1.is(r3)) return true;
3235 if (r1.is(r4)) return true; 3235 if (r1.is(r4)) return true;
3236 if (r2.is(r3)) return true; 3236 if (r2.is(r3)) return true;
3237 if (r2.is(r4)) return true; 3237 if (r2.is(r4)) return true;
3238 if (r3.is(r4)) return true; 3238 if (r3.is(r4)) return true;
3239 return false; 3239 return false;
3240 } 3240 }
3241 3241
3242 3242
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3275 void CodePatcher::EmitCondition(Condition cond) { 3275 void CodePatcher::EmitCondition(Condition cond) {
3276 Instr instr = Assembler::instr_at(masm_.pc_); 3276 Instr instr = Assembler::instr_at(masm_.pc_);
3277 instr = (instr & ~kCondMask) | cond; 3277 instr = (instr & ~kCondMask) | cond;
3278 masm_.emit(instr); 3278 masm_.emit(instr);
3279 } 3279 }
3280 3280
3281 3281
3282 } } // namespace v8::internal 3282 } } // namespace v8::internal
3283 3283
3284 #endif // V8_TARGET_ARCH_ARM 3284 #endif // V8_TARGET_ARCH_ARM
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