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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #if V8_TARGET_ARCH_X87 | 5 #if V8_TARGET_ARCH_X87 |
6 | 6 |
7 #include "src/base/bits.h" | 7 #include "src/base/bits.h" |
8 #include "src/base/division-by-constant.h" | 8 #include "src/base/division-by-constant.h" |
9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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1997 void MacroAssembler::StubReturn(int argc) { | 1997 void MacroAssembler::StubReturn(int argc) { |
1998 DCHECK(argc >= 1 && generating_stub()); | 1998 DCHECK(argc >= 1 && generating_stub()); |
1999 ret((argc - 1) * kPointerSize); | 1999 ret((argc - 1) * kPointerSize); |
2000 } | 2000 } |
2001 | 2001 |
2002 | 2002 |
2003 bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { | 2003 bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
2004 return has_frame_ || !stub->SometimesSetsUpAFrame(); | 2004 return has_frame_ || !stub->SometimesSetsUpAFrame(); |
2005 } | 2005 } |
2006 | 2006 |
2007 | |
2008 void MacroAssembler::IndexFromHash(Register hash, Register index) { | |
2009 // The assert checks that the constants for the maximum number of digits | |
2010 // for an array index cached in the hash field and the number of bits | |
2011 // reserved for it does not conflict. | |
2012 DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < | |
2013 (1 << String::kArrayIndexValueBits)); | |
2014 if (!index.is(hash)) { | |
2015 mov(index, hash); | |
2016 } | |
2017 DecodeFieldToSmi<String::ArrayIndexValueBits>(index); | |
2018 } | |
2019 | |
2020 | |
2021 void MacroAssembler::CallRuntime(const Runtime::Function* f, int num_arguments, | 2007 void MacroAssembler::CallRuntime(const Runtime::Function* f, int num_arguments, |
2022 SaveFPRegsMode save_doubles) { | 2008 SaveFPRegsMode save_doubles) { |
2023 // If the expected number of arguments of the runtime function is | 2009 // If the expected number of arguments of the runtime function is |
2024 // constant, we check that the actual number of arguments match the | 2010 // constant, we check that the actual number of arguments match the |
2025 // expectation. | 2011 // expectation. |
2026 CHECK(f->nargs < 0 || f->nargs == num_arguments); | 2012 CHECK(f->nargs < 0 || f->nargs == num_arguments); |
2027 | 2013 |
2028 // TODO(1236192): Most runtime routines don't need the number of | 2014 // TODO(1236192): Most runtime routines don't need the number of |
2029 // arguments passed in because it is constant. At some point we | 2015 // arguments passed in because it is constant. At some point we |
2030 // should remove this need and make the runtime routine entry code | 2016 // should remove this need and make the runtime routine entry code |
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3214 mov(eax, dividend); | 3200 mov(eax, dividend); |
3215 shr(eax, 31); | 3201 shr(eax, 31); |
3216 add(edx, eax); | 3202 add(edx, eax); |
3217 } | 3203 } |
3218 | 3204 |
3219 | 3205 |
3220 } // namespace internal | 3206 } // namespace internal |
3221 } // namespace v8 | 3207 } // namespace v8 |
3222 | 3208 |
3223 #endif // V8_TARGET_ARCH_X87 | 3209 #endif // V8_TARGET_ARCH_X87 |
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