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Issue 6461017: ARM: Add type-feedback recording for compare... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 9 years, 10 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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2372 // Result was clobbered. Restore it. 2372 // Result was clobbered. Restore it.
2373 ldr(result, MemOperand(ldr_location)); 2373 ldr(result, MemOperand(ldr_location));
2374 } 2374 }
2375 // Get the address of the constant. 2375 // Get the address of the constant.
2376 and_(result, result, Operand(kLdrOffsetMask)); 2376 and_(result, result, Operand(kLdrOffsetMask));
2377 add(result, ldr_location, Operand(result)); 2377 add(result, ldr_location, Operand(result));
2378 add(result, result, Operand(kPCRegOffset)); 2378 add(result, result, Operand(kPCRegOffset));
2379 } 2379 }
2380 2380
2381 2381
2382 #ifdef ENABLE_DEBUGGER_SUPPORT
2383 CodePatcher::CodePatcher(byte* address, int instructions) 2382 CodePatcher::CodePatcher(byte* address, int instructions)
2384 : address_(address), 2383 : address_(address),
2385 instructions_(instructions), 2384 instructions_(instructions),
2386 size_(instructions * Assembler::kInstrSize), 2385 size_(instructions * Assembler::kInstrSize),
2387 masm_(address, size_ + Assembler::kGap) { 2386 masm_(address, size_ + Assembler::kGap) {
2388 // Create a new macro assembler pointing to the address of the code to patch. 2387 // Create a new macro assembler pointing to the address of the code to patch.
2389 // The size is adjusted with kGap on order for the assembler to generate size 2388 // The size is adjusted with kGap on order for the assembler to generate size
2390 // bytes of instructions without failing with buffer size constraints. 2389 // bytes of instructions without failing with buffer size constraints.
2391 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 2390 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
2392 } 2391 }
2393 2392
2394 2393
2395 CodePatcher::~CodePatcher() { 2394 CodePatcher::~CodePatcher() {
2396 // Indicate that code has changed. 2395 // Indicate that code has changed.
2397 CPU::FlushICache(address_, size_); 2396 CPU::FlushICache(address_, size_);
2398 2397
2399 // Check that the code was patched as expected. 2398 // Check that the code was patched as expected.
2400 ASSERT(masm_.pc_ == address_ + size_); 2399 ASSERT(masm_.pc_ == address_ + size_);
2401 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 2400 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
2402 } 2401 }
2403 2402
2404 2403
2405 void CodePatcher::Emit(Instr x) { 2404 void CodePatcher::Emit(Instr instr) {
2406 masm()->emit(x); 2405 masm()->emit(instr);
2407 } 2406 }
2408 2407
2409 2408
2410 void CodePatcher::Emit(Address addr) { 2409 void CodePatcher::Emit(Address addr) {
2411 masm()->emit(reinterpret_cast<Instr>(addr)); 2410 masm()->emit(reinterpret_cast<Instr>(addr));
2412 } 2411 }
2413 #endif // ENABLE_DEBUGGER_SUPPORT 2412
2413
2414 void CodePatcher::EmitCondition(Condition cond) {
2415 Instr instr = Assembler::instr_at(masm_.pc_);
2416 instr = (instr & ~kCondMask) | cond;
2417 masm_.emit(instr);
2418 }
2414 2419
2415 2420
2416 } } // namespace v8::internal 2421 } } // namespace v8::internal
2417 2422
2418 #endif // V8_TARGET_ARCH_ARM 2423 #endif // V8_TARGET_ARCH_ARM
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