// Vector types are always returned in XMM0. If the target doesn't have XMM0,
// it won't have vector types.
- CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToReg<[XMM0]>>
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToReg<[XMM0]>>,
+
+ // MMX vector types are always returned in MM0. If the target doesn't have
+ // MM0, it doesn't support these vector types.
+ CCIfType<[v8i8, v4i16, v2i32, v1i64], CCAssignToReg<[MM0]>>
]>;
// X86-32 C return-value convention.
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 GPRs.
+ 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>>,
// Vectors get 16-byte stack slots that are 16-byte aligned.
- CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
- CCAssignToStack<16, 16>>
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>,
+
+ // __m64 vectors get 8-byte stack slots that are 8-byte aligned.
+ CCIfType<[v8i8, v4i16, v2i32, v1i64], CCAssignToStack<8, 8>>
]>;
CCAssignToReg<[XMM0, XMM1, XMM2, XMM3]>>,
// Other vectors get 16-byte stack slots that are 16-byte aligned.
- CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>,
+
+ // __m64 vectors get 8-byte stack slots that are 8-byte aligned. They are
+ // passed in the parameter area.
+ CCIfType<[v8i8, v4i16, v2i32, v1i64], CCAssignToStack<8, 8>>
]>;
def CC_X86_32_C : CallingConv<[
CCIfType<[i8, i16], CCPromoteToType<i32>>,
// The first 2 integer arguments are passed in ECX/EDX
- CCIfInReg<CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>>,
+ CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>,
// Otherwise, same as everything else.
CCDelegateTo<CC_X86_32_Common>