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, 13 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/Target.pri b/Source/JavaScriptCore/Target.pri
index f609de10b..e1da901c1 100644
--- a/Source/JavaScriptCore/Target.pri
+++ b/Source/JavaScriptCore/Target.pri
@@ -297,6 +297,19 @@ linux-*:if(isEqual(QT_ARCH, "i386")|isEqual(QT_ARCH, "x86_64")) {
         disassembler/udis86/udis86_syn.c \
 }
 
+win32:!win32-g++*:isEqual(QT_ARCH, "x86_64"):{
+    asm_compiler.commands = ml64 /c
+    asm_compiler.commands +=  /Fo ${QMAKE_FILE_OUT} ${QMAKE_FILE_IN}
+    asm_compiler.output = ${QMAKE_VAR_OBJECTS_DIR}${QMAKE_FILE_BASE}$${first(QMAKE_EXT_OBJ)}
+    asm_compiler.input = ASM_SOURCES
+    asm_compiler.variable_out = OBJECTS
+    asm_compiler.name = compiling[asm] ${QMAKE_FILE_IN}
+    silent:asm_compiler.commands = @echo compiling[asm] ${QMAKE_FILE_IN} && $$asm_compiler.commands
+    QMAKE_EXTRA_COMPILERS += asm_compiler
+
+    ASM_SOURCES += jit/JITStubsMSVC64.asm
+}
+
 HEADERS += $$files(*.h, true)
 
 *sh4* {