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| author | Evan Cheng <evan.cheng@apple.com> | 2008-09-05 17:24:07 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-09-05 17:24:07 +0000 |
| commit | e2471a9169b23cf13a7e81a6ba35fa2675d320ad (patch) | |
| tree | e375e38bb17450d92118a570b2b98d85a4c97fde /lib/Target/X86/X86CallingConv.td | |
| parent | c89d2feb35560883688e43b553b8e94e7cd371de (diff) | |
| download | llvm-e2471a9169b23cf13a7e81a6ba35fa2675d320ad.tar.gz llvm-e2471a9169b23cf13a7e81a6ba35fa2675d320ad.tar.bz2 llvm-e2471a9169b23cf13a7e81a6ba35fa2675d320ad.tar.xz | |
If SSE2 is available, x86 should pass first 3 f32/f64 arguments in XMM registers for fastcc calls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55840 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86CallingConv.td')
| -rw-r--r-- | lib/Target/X86/X86CallingConv.td | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td index 549eb9b9a2..e720b0b3b2 100644 --- a/lib/Target/X86/X86CallingConv.td +++ b/lib/Target/X86/X86CallingConv.td @@ -352,6 +352,12 @@ def CC_X86_32_FastCC : CallingConv<[ // The first 2 integer arguments are passed in ECX/EDX CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>, + // The first 3 float or double arguments, if the call is not a vararg + // call and if SSE2 is available, are passed in SSE registers. + CCIfNotVarArg<CCIfType<[f32,f64], + CCIfSubtarget<"hasSSE2()", + CCAssignToReg<[XMM0,XMM1,XMM2]>>>>, + // Doubles get 8-byte slots that are 8-byte aligned. CCIfType<[f64], CCAssignToStack<8, 8>>, |