// Mips O32 Calling Convention
//===----------------------------------------------------------------------===//
+def CC_MipsO32 : CallingConv<[
+ // Promote i8/i16 arguments to i32.
+ CCIfType<[i1, i8, i16], CCPromoteToType<i32>>,
+
+ // Integer values get stored in stack slots that are 4 bytes in
+ // size and 4-byte aligned.
+ CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
+
+ // Integer values get stored in stack slots that are 8 bytes in
+ // size and 8-byte aligned.
+ CCIfType<[f64], CCAssignToStack<8, 8>>
+]>;
+
// Only the return rules are defined here for O32. The rules for argument
// passing are defined in MipsISelLowering.cpp.
def RetCC_MipsO32 : CallingConv<[
CCIfType<[f64], CCIfSubtargetNot<"isFP64bit()", CCAssignToReg<[D0, D1]>>>
]>;
+def CC_MipsO32_FP32 : CustomCallingConv;
+def CC_MipsO32_FP64 : CustomCallingConv;
+
+def CC_MipsO32_FP : CallingConv<[
+ CCIfSubtargetNot<"isFP64bit()", CCDelegateTo<CC_MipsO32_FP32>>,
+ CCIfSubtarget<"isFP64bit()", CCDelegateTo<CC_MipsO32_FP64>>
+]>;
+
//===----------------------------------------------------------------------===//
// Mips N32/64 Calling Convention
//===----------------------------------------------------------------------===//
+def CC_MipsN_SoftFloat : CallingConv<[
+ CCAssignToRegWithShadow<[A0, A1, A2, A3,
+ T0, T1, T2, T3],
+ [D12_64, D13_64, D14_64, D15_64,
+ D16_64, D17_64, D18_64, D19_64]>,
+ CCAssignToStack<4, 8>
+]>;
+
def CC_MipsN : CallingConv<[
- // Promote i8/i16 arguments to i32.
- CCIfType<[i8, i16], CCPromoteToType<i32>>,
+ CCIfType<[i8, i16, i32],
+ CCIfSubtargetNot<"isLittle()",
+ CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
- // Integer arguments are passed in integer registers.
- CCIfType<[i32], CCAssignToRegWithShadow<[A0, A1, A2, A3,
- T0, T1, T2, T3],
- [F12, F13, F14, F15,
- F16, F17, F18, F19]>>,
+ // All integers (except soft-float integers) are promoted to 64-bit.
+ CCIfType<[i8, i16, i32],
+ CCIf<"!static_cast<MipsCCState *>(&State)->WasOriginalArgFloat(ValNo)",
+ CCPromoteToType<i64>>>,
+
+ // The only i32's we have left are soft-float arguments.
+ CCIfSubtarget<"abiUsesSoftFloat()", CCIfType<[i32], CCDelegateTo<CC_MipsN_SoftFloat>>>,
+ // Integer arguments are passed in integer registers.
CCIfType<[i64], CCAssignToRegWithShadow<[A0_64, A1_64, A2_64, A3_64,
T0_64, T1_64, T2_64, T3_64],
[D12_64, D13_64, D14_64, D15_64,
T0_64, T1_64, T2_64, T3_64]>>,
// All stack parameter slots become 64-bit doublewords and are 8-byte aligned.
- CCIfType<[i32, f32], CCAssignToStack<4, 8>>,
+ CCIfType<[f32], CCAssignToStack<4, 8>>,
CCIfType<[i64, f64], CCAssignToStack<8, 8>>
]>;
// N32/64 variable arguments.
// All arguments are passed in integer registers.
def CC_MipsN_VarArg : CallingConv<[
- // Promote i8/i16 arguments to i32.
- CCIfType<[i8, i16], CCPromoteToType<i32>>,
+ // All integers are promoted to 64-bit.
+ CCIfType<[i8, i16, i32], CCPromoteToType<i64>>,
- CCIfType<[i32, f32], CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3]>>,
+ CCIfType<[f32], CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3]>>,
CCIfType<[i64, f64], CCAssignToReg<[A0_64, A1_64, A2_64, A3_64,
T0_64, T1_64, T2_64, T3_64]>>,
// All stack parameter slots become 64-bit doublewords and are 8-byte aligned.
- CCIfType<[i32, f32], CCAssignToStack<4, 8>>,
+ CCIfType<[f32], CCAssignToStack<4, 8>>,
CCIfType<[i64, f64], CCAssignToStack<8, 8>>
]>;
CCIfSubtarget<"isLittle()",
CCIfType<[i8, i16, i32, i64], CCIfInReg<CCPromoteToType<i64>>>>,
CCIfSubtargetNot<"isLittle()",
- CCIfType<[i8, i16, i32, i64], CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
-
- // i32 are returned in registers V0, V1
- CCIfType<[i32], CCAssignToReg<[V0, V1]>>,
+ CCIfType<[i8, i16, i32, i64],
+ CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
// i64 are returned in registers V0_64, V1_64
CCIfType<[i64], CCAssignToReg<[V0_64, V1_64]>>,
CCDelegateTo<CC_MipsN_FastCC>
]>;
-//==
-
-def CC_Mips16RetHelper : CallingConv<[
- // Integer arguments are passed in integer registers.
- CCIfType<[i32], CCAssignToReg<[V0, V1, A0, A1]>>
-]>;
-
//===----------------------------------------------------------------------===//
// Mips Calling Convention Dispatch
//===----------------------------------------------------------------------===//
CCDelegateTo<RetCC_MipsO32>
]>;
+def CC_Mips_ByVal : CallingConv<[
+ CCIfSubtarget<"isABI_O32()", CCIfByVal<CCPassByVal<4, 4>>>,
+ CCIfByVal<CCPassByVal<8, 8>>
+]>;
+
+def CC_Mips16RetHelper : CallingConv<[
+ CCIfByVal<CCDelegateTo<CC_Mips_ByVal>>,
+
+ // Integer arguments are passed in integer registers.
+ CCIfType<[i32], CCAssignToReg<[V0, V1, A0, A1]>>
+]>;
+
+def CC_Mips_FixedArg : CallingConv<[
+ // Mips16 needs special handling on some functions.
+ CCIf<"State.getCallingConv() != CallingConv::Fast",
+ CCIf<"static_cast<MipsCCState *>(&State)->getSpecialCallingConv() == "
+ "MipsCCState::Mips16RetHelperConv",
+ CCDelegateTo<CC_Mips16RetHelper>>>,
+
+ CCIfByVal<CCDelegateTo<CC_Mips_ByVal>>,
+
+ // f128 needs to be handled similarly to f32 and f64 on hard-float. However,
+ // f128 is not legal and is lowered to i128 which is further lowered to a pair
+ // of i64's.
+ // This presents us with a problem for the calling convention since hard-float
+ // still needs to pass them in FPU registers. We therefore resort to a
+ // pre-analyze (see PreAnalyzeFormalArgsForF128()) step to pass information on
+ // whether the argument was originally an f128 into the tablegen-erated code.
+ //
+ // f128 should only occur for the N64 ABI where long double is 128-bit. On
+ // N32, long double is equivalent to double.
+ CCIfType<[i64],
+ CCIfSubtargetNot<"abiUsesSoftFloat()",
+ CCIf<"static_cast<MipsCCState *>(&State)->WasOriginalArgF128(ValNo)",
+ CCBitConvertToType<f64>>>>,
+
+ CCIfCC<"CallingConv::Fast", CCDelegateTo<CC_Mips_FastCC>>,
+
+ // FIXME: There wasn't an EABI case in the original code and it seems unlikely
+ // that it's the same as CC_MipsN
+ CCIfSubtarget<"isABI_O32()", CCDelegateTo<CC_MipsO32_FP>>,
+ CCDelegateTo<CC_MipsN>
+]>;
+
+def CC_Mips_VarArg : CallingConv<[
+ CCIfByVal<CCDelegateTo<CC_Mips_ByVal>>,
+
+ // FIXME: There wasn't an EABI case in the original code and it seems unlikely
+ // that it's the same as CC_MipsN_VarArg
+ CCIfSubtarget<"isABI_O32()", CCDelegateTo<CC_MipsO32_FP>>,
+ CCDelegateTo<CC_MipsN_VarArg>
+]>;
+
+def CC_Mips : CallingConv<[
+ CCIfVarArg<
+ CCIf<"!static_cast<MipsCCState *>(&State)->IsCallOperandFixed(ValNo)",
+ CCDelegateTo<CC_Mips_VarArg>>>,
+ CCDelegateTo<CC_Mips_FixedArg>
+]>;
+
//===----------------------------------------------------------------------===//
// Callee-saved register lists.
//===----------------------------------------------------------------------===//
projects / oota-llvm.git / blobdiff