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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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2211 | 2211 |
2212 // Load instance type for both strings. | 2212 // Load instance type for both strings. |
2213 movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); | 2213 movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
2214 movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); | 2214 movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
2215 movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); | 2215 movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
2216 movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); | 2216 movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
2217 | 2217 |
2218 // Check that both are flat ASCII strings. | 2218 // Check that both are flat ASCII strings. |
2219 ASSERT(kNotStringTag != 0); | 2219 ASSERT(kNotStringTag != 0); |
2220 const int kFlatAsciiStringMask = | 2220 const int kFlatAsciiStringMask = |
2221 kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; | 2221 kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask | |
| 2222 kStringRepresentationMask; |
2222 const int kFlatAsciiStringTag = ASCII_STRING_TYPE; | 2223 const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
2223 | 2224 |
2224 andl(scratch1, Immediate(kFlatAsciiStringMask)); | 2225 andl(scratch1, Immediate(kFlatAsciiStringMask)); |
2225 andl(scratch2, Immediate(kFlatAsciiStringMask)); | 2226 andl(scratch2, Immediate(kFlatAsciiStringMask)); |
2226 // Interleave the bits to check both scratch1 and scratch2 in one test. | 2227 // Interleave the bits to check both scratch1 and scratch2 in one test. |
2227 ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); | 2228 ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 8)); |
2228 lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); | 2229 ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask); |
| 2230 shl(scratch1, Immediate(8)); |
| 2231 orl(scratch1, scratch2); |
2229 cmpl(scratch1, | 2232 cmpl(scratch1, |
2230 Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); | 2233 Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 8))); |
2231 j(not_equal, on_fail, near_jump); | 2234 j(not_equal, on_fail, near_jump); |
2232 } | 2235 } |
2233 | 2236 |
2234 | 2237 |
2235 void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( | 2238 void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
2236 Register instance_type, | 2239 Register instance_type, |
2237 Register scratch, | 2240 Register scratch, |
2238 Label* failure, | 2241 Label* failure, |
2239 Label::Distance near_jump) { | 2242 Label::Distance near_jump) { |
2240 if (!scratch.is(instance_type)) { | 2243 if (!scratch.is(instance_type)) { |
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2256 Register scratch1, | 2259 Register scratch1, |
2257 Register scratch2, | 2260 Register scratch2, |
2258 Label* on_fail, | 2261 Label* on_fail, |
2259 Label::Distance near_jump) { | 2262 Label::Distance near_jump) { |
2260 // Load instance type for both strings. | 2263 // Load instance type for both strings. |
2261 movq(scratch1, first_object_instance_type); | 2264 movq(scratch1, first_object_instance_type); |
2262 movq(scratch2, second_object_instance_type); | 2265 movq(scratch2, second_object_instance_type); |
2263 | 2266 |
2264 // Check that both are flat ASCII strings. | 2267 // Check that both are flat ASCII strings. |
2265 ASSERT(kNotStringTag != 0); | 2268 ASSERT(kNotStringTag != 0); |
2266 const int kFlatAsciiStringMask = | 2269 const int kFlatAsciiStringMask = kIsNotStringMask | kStringRepresentationMask |
2267 kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; | 2270 | kStringEncodingMask | kAsciiDataHintTag; |
2268 const int kFlatAsciiStringTag = ASCII_STRING_TYPE; | 2271 const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
2269 | 2272 |
2270 andl(scratch1, Immediate(kFlatAsciiStringMask)); | 2273 andl(scratch1, Immediate(kFlatAsciiStringMask)); |
2271 andl(scratch2, Immediate(kFlatAsciiStringMask)); | 2274 andl(scratch2, Immediate(kFlatAsciiStringMask)); |
2272 // Interleave the bits to check both scratch1 and scratch2 in one test. | 2275 // Interleave the bits to check both scratch1 and scratch2 in one test. |
2273 ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); | 2276 ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 8)); |
2274 lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); | 2277 ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask); |
| 2278 shl(scratch1, Immediate(8)); |
| 2279 orl(scratch1, scratch2); |
2275 cmpl(scratch1, | 2280 cmpl(scratch1, |
2276 Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); | 2281 Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 8))); |
2277 j(not_equal, on_fail, near_jump); | 2282 j(not_equal, on_fail, near_jump); |
2278 } | 2283 } |
2279 | 2284 |
2280 | 2285 |
2281 | 2286 |
2282 void MacroAssembler::Move(Register dst, Register src) { | 2287 void MacroAssembler::Move(Register dst, Register src) { |
2283 if (!dst.is(src)) { | 2288 if (!dst.is(src)) { |
2284 movq(dst, src); | 2289 movq(dst, src); |
2285 } | 2290 } |
2286 } | 2291 } |
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4624 CompareRoot(MemOperand(scratch_reg, 0), | 4629 CompareRoot(MemOperand(scratch_reg, 0), |
4625 Heap::kAllocationSiteInfoMapRootIndex); | 4630 Heap::kAllocationSiteInfoMapRootIndex); |
4626 j(equal, allocation_info_present); | 4631 j(equal, allocation_info_present); |
4627 bind(&no_info_available); | 4632 bind(&no_info_available); |
4628 } | 4633 } |
4629 | 4634 |
4630 | 4635 |
4631 } } // namespace v8::internal | 4636 } } // namespace v8::internal |
4632 | 4637 |
4633 #endif // V8_TARGET_ARCH_X64 | 4638 #endif // V8_TARGET_ARCH_X64 |
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