Implement JIT on Windows 64 bits

https://bugs.webkit.org/show_bug.cgi?id=107965

Reviewed by Simon Hausmann.

Source/JavaScriptCore:

1. MSVC doesn't support inline assembly for 64 bits, implements the trampoline in a separate ASM file.

2. Windows 64 bits has a different calling convention than other OSes following the AMD64 ABI.
Differences that we have to handle here:
- Registers passed parameters are RCX, RDX, R8 and R9 instead of RDI, RSI, RDX, RCX, R8 and R9
- RDI and RSI must be preserved by callee
- Only return values <= 8 bytes can be returned by register (RDX can't be used to return a second word)
- There is no red-zone after RIP on the stack, but instead 4 reserved words before it

* Target.pri:
* jit/JITStubs.cpp:
* jit/JITStubs.h:
(JSC):
(JITStackFrame):
(JSC::JITStackFrame::returnAddressSlot):
* jit/JITStubsMSVC64.asm: Added.
* jit/JSInterfaceJIT.h:
(JSInterfaceJIT):
* jit/ThunkGenerators.cpp:
(JSC::nativeForGenerator):
* yarr/YarrJIT.cpp:
(YarrGenerator):
(JSC::Yarr::YarrGenerator::generateEnter):
(JSC::Yarr::YarrGenerator::generateReturn):

Source/WTF:

* wtf/Platform.h:

Change-Id: Ie1910350e36defcd427a95ceb9aa280fa61083e7
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144043 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/Source/JavaScriptCore/jit/JSInterfaceJIT.h b/Source/JavaScriptCore/jit/JSInterfaceJIT.h
index d2a91ba0a..ad546d963 100644
--- a/Source/JavaScriptCore/jit/JSInterfaceJIT.h
+++ b/Source/JavaScriptCore/jit/JSInterfaceJIT.h
@@ -57,22 +57,26 @@ namespace JSC {
 #if CPU(X86_64)
         static const RegisterID returnValueRegister = X86Registers::eax;
         static const RegisterID cachedResultRegister = X86Registers::eax;
+#if !OS(WINDOWS)
         static const RegisterID firstArgumentRegister = X86Registers::edi;
-        
+#else
+        static const RegisterID firstArgumentRegister = X86Registers::ecx;
+#endif
+
 #if ENABLE(VALUE_PROFILER)
         static const RegisterID bucketCounterRegister = X86Registers::r10;
 #endif
-        
+
         static const RegisterID timeoutCheckRegister = X86Registers::r12;
         static const RegisterID callFrameRegister = X86Registers::r13;
         static const RegisterID tagTypeNumberRegister = X86Registers::r14;
         static const RegisterID tagMaskRegister = X86Registers::r15;
-        
+
         static const RegisterID regT0 = X86Registers::eax;
         static const RegisterID regT1 = X86Registers::edx;
         static const RegisterID regT2 = X86Registers::ecx;
         static const RegisterID regT3 = X86Registers::ebx;
-        
+
         static const FPRegisterID fpRegT0 = X86Registers::xmm0;
         static const FPRegisterID fpRegT1 = X86Registers::xmm1;
         static const FPRegisterID fpRegT2 = X86Registers::xmm2;