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