diff options
Diffstat (limited to 'src/3rdparty/v8/src/ia32/cpu-ia32.cc')
-rw-r--r-- | src/3rdparty/v8/src/ia32/cpu-ia32.cc | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/ia32/cpu-ia32.cc b/src/3rdparty/v8/src/ia32/cpu-ia32.cc new file mode 100644 index 0000000..615dbfe --- /dev/null +++ b/src/3rdparty/v8/src/ia32/cpu-ia32.cc @@ -0,0 +1,88 @@ +// Copyright 2006-2008 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// CPU specific code for ia32 independent of OS goes here. + +#ifdef __GNUC__ +#include "third_party/valgrind/valgrind.h" +#endif + +#include "v8.h" + +#if defined(V8_TARGET_ARCH_IA32) + +#include "cpu.h" +#include "macro-assembler.h" + +namespace v8 { +namespace internal { + +void CPU::Setup() { + CpuFeatures::Probe(); +} + + +bool CPU::SupportsCrankshaft() { + return CpuFeatures::IsSupported(SSE2); +} + + +void CPU::FlushICache(void* start, size_t size) { + // No need to flush the instruction cache on Intel. On Intel instruction + // cache flushing is only necessary when multiple cores running the same + // code simultaneously. V8 (and JavaScript) is single threaded and when code + // is patched on an intel CPU the core performing the patching will have its + // own instruction cache updated automatically. + + // If flushing of the instruction cache becomes necessary Windows has the + // API function FlushInstructionCache. + + // By default, valgrind only checks the stack for writes that might need to + // invalidate already cached translated code. This leads to random + // instability when code patches or moves are sometimes unnoticed. One + // solution is to run valgrind with --smc-check=all, but this comes at a big + // performance cost. We can notify valgrind to invalidate its cache. +#ifdef VALGRIND_DISCARD_TRANSLATIONS + VALGRIND_DISCARD_TRANSLATIONS(start, size); +#endif +} + + +void CPU::DebugBreak() { +#ifdef _MSC_VER + // To avoid Visual Studio runtime support the following code can be used + // instead + // __asm { int 3 } + __debugbreak(); +#else + asm("int $3"); +#endif +} + +} } // namespace v8::internal + +#endif // V8_TARGET_ARCH_IA32 |