diff options
| -rw-r--r-- | lib/Target/X86/X86CallingConv.td | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td index d9a63c4ecd..ea01d1ead1 100644 --- a/lib/Target/X86/X86CallingConv.td +++ b/lib/Target/X86/X86CallingConv.td @@ -101,6 +101,10 @@ def CC_X86_64_C : CallingConv<[ CCIfType<[f32, f64, v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToReg<[XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7]>>, + // The first 8 MMX vector arguments are passed in MMX registers. + CCIfType<[v8i8, v4i16, v2i32, v1i64], + CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>, + // Integer/FP values get stored in stack slots that are 8 bytes in size and // 8-byte aligned if there are no more registers to hold them. CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>, |