//
//===----------------------------------------------------------------------===//
-
-class CCAction;
-class CallingConv;
-
-
-/// CCMatchType - If the current argument is one of the specified types, apply
-/// Action A.
-class CCMatchType<list<ValueType> VTs, CCAction A> : CCAction {
-}
-
-/// CCMatchIf - If the predicate matches, apply A.
-class CCMatchIf<string predicate, CCAction A> : CCAction {
- string Predicate = predicate;
-}
-
-/// CCAssignToReg - This action matches if there is a register in the specified
-/// list that is still available. If so, it assigns the value to the first
-/// available register and succeeds.
-class CCAssignToReg<list<Register> regList> : CCAction {
- list<Register> RegList = regList;
-}
-
-/// CCAssignToStack - This action always matches: it assigns the value to a
-/// stack slot of the specified size and alignment on the stack.
-class CCAssignToStack<int size, int align> : CCAction {
- int Size = size;
- int Align = align;
-}
-
-
-
-/// CCPromoteToType - If applied, this promotes the specified current value to
-/// the specified type.
-class CCPromoteToType<ValueType destTy> : CCAction {
- ValueType DestTy = destTy;
-}
-
-/// CCDelegateTo - This action invokes the specified sub-calling-convention. It
-/// is successful if the specified CC matches.
-class CCDelegateTo<CallingConv cc> : CCAction {
- CallingConv CC = cc;
-}
-
-
-class CallingConv<list<CCAction> actions> {
- list<CCAction> Actions = actions;
-}
+/// CCIfSubtarget - Match if the current subtarget has a feature F.
+class CCIfSubtarget<string F, CCAction A>
+ : CCIf<!strconcat("State.getTarget().getSubtarget<X86Subtarget>().", F), A>;
//===----------------------------------------------------------------------===//
// Return Value Calling Conventions
//===----------------------------------------------------------------------===//
+// Return-value conventions common to all X86 CC's.
def RetCC_X86Common : CallingConv<[
// Scalar values are returned in AX first, then DX.
- CCMatchType<[i8] , CCAssignToReg<[AL]>>,
- CCMatchType<[i16], CCAssignToReg<[AX]>>,
- CCMatchType<[i32], CCAssignToReg<[EAX, EDX]>>,
- CCMatchType<[i64], CCAssignToReg<[RAX, RDX]>>,
+ CCIfType<[i8] , CCAssignToReg<[AL]>>,
+ CCIfType<[i16], CCAssignToReg<[AX]>>,
+ CCIfType<[i32], CCAssignToReg<[EAX, EDX]>>,
+ CCIfType<[i64], CCAssignToReg<[RAX, RDX]>>,
- // Vector types are always returned in XMM0. If the target doesn't have XMM0,
- // it won't have vector types.
- CCMatchType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToReg<[XMM0]>>
+ // Vector types are returned in XMM0 and XMM1, when they fit. If the target
+ // doesn't have XMM registers, it won't have vector types.
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
+ CCAssignToReg<[XMM0,XMM1]>>,
+
+ // 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]>>
]>;
-// Return conventions for the X86-32 C calling convention.
+// X86-32 C return-value convention.
def RetCC_X86_32_C : CallingConv<[
// The X86-32 calling convention returns FP values in ST0, otherwise it is the
// same as the common X86 calling conv.
- CCMatchType<[f32], CCAssignToReg<[ST0]>>,
- CCMatchType<[f64], CCAssignToReg<[ST0]>>,
+ CCIfType<[f32], CCAssignToReg<[ST0]>>,
+ CCIfType<[f64], CCAssignToReg<[ST0]>>,
CCDelegateTo<RetCC_X86Common>
]>;
-// Return conventions for the X86-32 Fast calling convention.
+// X86-32 FastCC return-value convention.
def RetCC_X86_32_Fast : CallingConv<[
// The X86-32 fastcc returns FP values in XMM0 if the target has SSE2,
// otherwise it is the the C calling conventions.
- CCMatchType<[f32], CCMatchIf<"Subtarget->hasSSE2()", CCAssignToReg<[XMM0]>>>,
- CCMatchType<[f64], CCMatchIf<"Subtarget->hasSSE2()", CCAssignToReg<[XMM0]>>>,
+ CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
+ CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
CCDelegateTo<RetCC_X86Common>
]>;
-// Return conventions for the X86-64 C calling convention.
+// X86-64 C return-value convention.
def RetCC_X86_64_C : CallingConv<[
// The X86-64 calling convention always returns FP values in XMM0.
- CCMatchType<[f32], CCAssignToReg<[XMM0]>>,
- CCMatchType<[f64], CCAssignToReg<[XMM0]>>,
+ CCIfType<[f32], CCAssignToReg<[XMM0]>>,
+ CCIfType<[f64], CCAssignToReg<[XMM0]>>,
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>>,
+ // Otherwise, use RetCC_X86_32_C.
+ CCDelegateTo<RetCC_X86_32_C>
+]>;
+
+// This is the root return-value convention for the X86-64 backend.
+def RetCC_X86_64 : CallingConv<[
+ // Always just the same as C calling conv for X86-64.
+ CCDelegateTo<RetCC_X86_64_C>
+]>;
+
+// This is the return-value convention used for the entire X86 backend.
+def RetCC_X86 : CallingConv<[
+ CCIfSubtarget<"is64Bit()", CCDelegateTo<RetCC_X86_64>>,
+ CCDelegateTo<RetCC_X86_32>
+]>;
+
//===----------------------------------------------------------------------===//
-// Argument Calling Conventions
+// X86-64 Argument Calling Conventions
//===----------------------------------------------------------------------===//
-
def CC_X86_64_C : CallingConv<[
// Promote i8/i16 arguments to i32.
- CCMatchType<[i8, i16], CCPromoteToType<i32>>,
+ CCIfType<[i8, i16], CCPromoteToType<i32>>,
+ CCIfStruct<CCStructAssign<[RDI, RSI, RDX, RCX, R8, R9 ]>>,
+
// The first 6 integer arguments are passed in integer registers.
- CCMatchType<[i32], CCAssignToReg<[EDI, ESI, EDX, ECX, R8D, R9D]>>,
- CCMatchType<[i64], CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>,
+ CCIfType<[i32], CCAssignToReg<[EDI, ESI, EDX, ECX, R8D, R9D]>>,
+ CCIfType<[i64], CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>,
// The first 8 FP/Vector arguments are passed in XMM registers.
- CCMatchType<[f32, f64, v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
+ 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.
- CCMatchType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
+ CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
// Vectors get 16-byte stack slots that are 16-byte aligned.
- CCMatchType<[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>>
]>;
+//===----------------------------------------------------------------------===//
+// X86 C Calling Convention
+//===----------------------------------------------------------------------===//
+
+/// CC_X86_32_Common - In all X86-32 calling conventions, extra integers and FP
+/// values are spilled on the stack, and the first 4 vector values go in XMM
+/// regs.
+def CC_X86_32_Common : CallingConv<[
+ // Integer/Float values get stored in stack slots that are 4 bytes in
+ // size and 4-byte aligned.
+ CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
+
+ // Doubles get 8-byte slots that are 4-byte aligned.
+ CCIfType<[f64], CCAssignToStack<8, 4>>,
+
+ // The first 4 vector arguments are passed in XMM registers.
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
+ 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>>,
+
+ // __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<[
+ // Promote i8/i16 arguments to i32.
+ CCIfType<[i8, i16], CCPromoteToType<i32>>,
+
+ // The first 3 integer arguments, if marked 'inreg' and if the call is not
+ // a vararg call, are passed in integer registers.
+ CCIfNotVarArg<CCIfInReg<CCIfType<[i32], CCAssignToReg<[EAX, EDX, ECX]>>>>,
+
+ // Otherwise, same as everything else.
+ CCDelegateTo<CC_X86_32_Common>
+]>;
+
+
+def CC_X86_32_FastCall : CallingConv<[
+ // Promote i8/i16 arguments to i32.
+ CCIfType<[i8, i16], CCPromoteToType<i32>>,
+
+ // The first 2 integer arguments are passed in ECX/EDX
+ CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>,
+
+ // Otherwise, same as everything else.
+ CCDelegateTo<CC_X86_32_Common>
+]>;
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