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Implement sseregparm.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46764 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2008-02-05 20:46:33 +00:00
parent bb4151bd1f
commit e672af15d6
3 changed files with 23 additions and 5 deletions
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18
lib/Target/X86/X86CallingConv.td
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@@ -61,6 +61,15 @@ def RetCC_X86_32_Fast : CallingConv<[
CCDelegateTo<RetCC_X86Common>
]>;
// X86-32 SSEregparm return-value convention.
def RetCC_X86_32_SSE : CallingConv<[
// The X86-32 sseregparm calling convention returns FP values in XMM0 if the
// target has SSE2, otherwise it is the C calling convention.
CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
CCDelegateTo<RetCC_X86Common>
]>;
// X86-64 C return-value convention.
def RetCC_X86_64_C : CallingConv<[
// The X86-64 calling convention always returns FP values in XMM0.
@@ -69,12 +78,12 @@ def RetCC_X86_64_C : CallingConv<[
CCDelegateTo<RetCC_X86Common>
]>;
// This is the root return-value convention for the X86-32 backend.
def RetCC_X86_32 : CallingConv<[
// If FastCC, use RetCC_X86_32_Fast.
CCIfCC<"CallingConv::Fast", CCDelegateTo<RetCC_X86_32_Fast>>,
// If SSECC, use RetCC_X86_32_SSE.
CCIfCC<"CallingConv::X86_SSECall", CCDelegateTo<RetCC_X86_32_SSE>>,
// Otherwise, use RetCC_X86_32_C.
CCDelegateTo<RetCC_X86_32_C>
]>;
@@ -179,6 +188,11 @@ def CC_X86_32_Common : CallingConv<[
// Handles byval parameters.
CCIfByVal<CCPassByVal<4, 4>>,
// The first 3 float or double arguments, if marked 'inreg' and if the call
// is not a vararg call and if SSE2 is available, are passed in SSE registers.
CCIfNotVarArg<CCIfInReg<CCIfType<[f32,f64], CCIfSubtarget<"hasSSE2()",
CCAssignToReg<[XMM0,XMM1,XMM2]>>>>>,
// Integer/Float values get stored in stack slots that are 4 bytes in
// size and 4-byte aligned.
CCIfType<[i32, f32], CCAssignToStack<4, 4>>,