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x86-64 JIT stub codegen.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35096 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-03-14 10:48:08 +00:00
parent 5c0b61a64b
commit 8510dc086e
1 changed files with 11 additions and 0 deletions
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11
lib/Target/X86/X86JITInfo.cpp
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@ -306,10 +306,21 @@ void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
bool NotCC = Fn != (void*)(intptr_t)X86CompilationCallback;
#endif
if (NotCC) {
#ifdef __x86_64__
MCE.startFunctionStub(13, 4);
MCE.emitByte(0x49); // REX prefix
MCE.emitByte(0xB8+2); // movabsq r10
MCE.emitWordLE(((unsigned *)&Fn)[0]);
MCE.emitWordLE(((unsigned *)&Fn)[1]);
MCE.emitByte(0x41); // REX prefix
MCE.emitByte(0xFF); // jmpq *r10
MCE.emitByte(2 | (4 << 3) | (3 << 6));
#else
MCE.startFunctionStub(5, 4);
MCE.emitByte(0xE9);
MCE.emitWordLE((intptr_t)Fn-MCE.getCurrentPCValue()-4);
return MCE.finishFunctionStub(0);
#endif
}
#ifdef __x86_64__