19fa09679c31dd1fc79a07ed24431b6951227240aricow@chromium.org// Copyright 2011 the V8 project authors. All rights reserved. 243d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// Redistribution and use in source and binary forms, with or without 343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// modification, are permitted provided that the following conditions are 443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// met: 543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// 643d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// * Redistributions of source code must retain the above copyright 743d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// notice, this list of conditions and the following disclaimer. 843d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// * Redistributions in binary form must reproduce the above 943d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// copyright notice, this list of conditions and the following 1043d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// disclaimer in the documentation and/or other materials provided 1143d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// with the distribution. 1243d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// * Neither the name of Google Inc. nor the names of its 1343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// contributors may be used to endorse or promote products derived 1443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// from this software without specific prior written permission. 1543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// 1643d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1743d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1843d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1943d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2043d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2143d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2243d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2643d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2743d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 2843d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen// CPU specific code for ia32 independent of OS goes here. 2943d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 305a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com#ifdef __GNUC__ 315a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com#include "third_party/valgrind/valgrind.h" 325a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com#endif 335a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com 3443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen#include "v8.h" 3543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 3693a47f4837f2137c8d8349250fd8e91da3108126jkummerow@chromium.org#if V8_TARGET_ARCH_IA32 379dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com 3843d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen#include "cpu.h" 39061ef74c9b8acd038edf4b4355c50d097c8a9683kasperl@chromium.org#include "macro-assembler.h" 4043d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 4171affb54842da76b24f0bb3184e9f0960523f89dkasperl@chromium.orgnamespace v8 { 4271affb54842da76b24f0bb3184e9f0960523f89dkasperl@chromium.orgnamespace internal { 4343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 44f2038fb01417bcf7698b87a5dfaa4a861539618aerik.corry@gmail.comvoid CPU::SetUp() { 45c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org CpuFeatures::Probe(); 46c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org} 47c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org 48c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org 49c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.orgbool CPU::SupportsCrankshaft() { 50c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org return CpuFeatures::IsSupported(SSE2); 5143d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen} 5243d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 5343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 5443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansenvoid CPU::FlushICache(void* start, size_t size) { 5543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // No need to flush the instruction cache on Intel. On Intel instruction 5643d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // cache flushing is only necessary when multiple cores running the same 5743d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // code simultaneously. V8 (and JavaScript) is single threaded and when code 5843d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // is patched on an intel CPU the core performing the patching will have its 5943d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // own instruction cache updated automatically. 6043d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 61b3284ad36ee358a35b81379ad1c449e4f8021362kasperl@chromium.org // If flushing of the instruction cache becomes necessary Windows has the 6243d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen // API function FlushInstructionCache. 635a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com 645a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com // By default, valgrind only checks the stack for writes that might need to 655a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com // invalidate already cached translated code. This leads to random 665a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com // instability when code patches or moves are sometimes unnoticed. One 675a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com // solution is to run valgrind with --smc-check=all, but this comes at a big 685a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com // performance cost. We can notify valgrind to invalidate its cache. 695a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com#ifdef VALGRIND_DISCARD_TRANSLATIONS 709fa09679c31dd1fc79a07ed24431b6951227240aricow@chromium.org unsigned res = VALGRIND_DISCARD_TRANSLATIONS(start, size); 719fa09679c31dd1fc79a07ed24431b6951227240aricow@chromium.org USE(res); 725a6af92a1549c81fb61855518f43b712e4c0e469christian.plesner.hansen@gmail.com#endif 7343d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen} 7443d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen 7543d26ecc3563a46f62a0224030667c8f8f3f6cebchristian.plesner.hansen} } // namespace v8::internal 769dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com 779dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com#endif // V8_TARGET_ARCH_IA32 78