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Only v1i16 (i.e. _m64) is returned via RAX / RDX.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65313 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-02-23 09:03:22 +00:00
parent 932be21c08
commit 242b38bae5
4 changed files with 59 additions and 19 deletions
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8
lib/Target/X86/X86CallingConv.td
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@@ -72,9 +72,11 @@ def RetCC_X86_64_C : CallingConv<[
CCIfType<[f32], CCAssignToReg<[XMM0, XMM1]>>,
CCIfType<[f64], CCAssignToReg<[XMM0, XMM1]>>,
// MMX vector types are always returned in RAX. This seems to disagree with
// ABI documentation but is bug compatible with gcc.
CCIfType<[v8i8, v4i16, v2i32, v1i64, v2f32], CCAssignToReg<[RAX]>>,
// MMX vector types are always returned in XMM0 except for v1i64 which is
// returned in RAX. This disagrees with ABI documentation but is bug
// compatible with gcc.
CCIfType<[v1i64], CCAssignToReg<[RAX]>>,
CCIfType<[v8i8, v4i16, v2i32, v2f32], CCAssignToReg<[XMM0, XMM1]>>,
CCDelegateTo<RetCC_X86Common>
]>;