//===----------------------------------------------------------------------===//
/// CCIfSubtarget - Match if the current subtarget has a feature F.
-class CCIfSubtarget<string F, CCAction A>
- : CCIf<!strconcat("static_cast<const MipsSubtarget&>"
+class CCIfSubtarget<string F, CCAction A, string Invert = "">
+ : CCIf<!strconcat(Invert,
+ "static_cast<const MipsSubtarget&>"
"(State.getMachineFunction().getSubtarget()).",
F),
A>;
+// The inverse of CCIfSubtarget
+class CCIfSubtargetNot<string F, CCAction A> : CCIfSubtarget<F, A, "!">;
+
+// For soft-float, f128 values are returned in A0_64 rather than V1_64.
+def RetCC_F128SoftFloat : CallingConv<[
+ CCAssignToReg<[V0_64, A0_64]>
+]>;
+
+// For hard-float, f128 values are returned as a pair of f64's rather than a
+// pair of i64's.
+def RetCC_F128HardFloat : CallingConv<[
+ CCBitConvertToType<f64>,
+ CCAssignToReg<[D0_64, D2_64]>
+]>;
+
+// Handle F128 specially since we can't identify the original type during the
+// tablegen-erated code.
+def RetCC_F128 : CallingConv<[
+ CCIfSubtarget<"abiUsesSoftFloat()",
+ CCIfType<[i64], CCDelegateTo<RetCC_F128SoftFloat>>>,
+ CCIfSubtargetNot<"abiUsesSoftFloat()",
+ CCIfType<[i64], CCDelegateTo<RetCC_F128HardFloat>>>
+]>;
+
//===----------------------------------------------------------------------===//
// Mips O32 Calling Convention
//===----------------------------------------------------------------------===//
// f64 arguments are returned in D0_64 and D2_64 in FP64bit mode or
// in D0 and D1 in FP32bit mode.
CCIfType<[f64], CCIfSubtarget<"isFP64bit()", CCAssignToReg<[D0_64, D2_64]>>>,
- CCIfType<[f64], CCIfSubtarget<"isNotFP64bit()", CCAssignToReg<[D0, D1]>>>
+ CCIfType<[f64], CCIfSubtargetNot<"isFP64bit()", CCAssignToReg<[D0, D1]>>>
]>;
//===----------------------------------------------------------------------===//
]>;
def RetCC_MipsN : CallingConv<[
+ // f128 needs to be handled similarly to f32 and f64. 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, and soft-float needs to use $v0,
+ // and $a0 instead of the usual $v0, and $v1. We therefore resort to a
+ // pre-analyze (see PreAnalyzeReturnForF128()) step to pass information on
+ // whether the result 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],
+ CCIf<"static_cast<MipsCCState *>(&State)->WasOriginalArgF128(ValNo)",
+ CCDelegateTo<RetCC_F128>>>,
+
+ // Aggregate returns are positioned at the lowest address in the slot for
+ // both little and big-endian targets. When passing in registers, this
+ // requires that big-endian targets shift the value into the upper bits.
+ CCIfSubtarget<"isLittle()",
+ CCIfType<[i8, i16, i32], CCIfInReg<CCPromoteToType<i64>>>>,
+ CCIfSubtargetNot<"isLittle()",
+ CCIfType<[i8, i16, i32], CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
+
// i32 are returned in registers V0, V1
CCIfType<[i32], CCAssignToReg<[V0, V1]>>,
CCIfType<[f64], CCAssignToReg<[D0_64, D2_64]>>
]>;
-// In soft-mode, register A0_64, instead of V1_64, is used to return a long
-// double value.
-def RetCC_F128Soft : CallingConv<[
- CCIfType<[i64], CCAssignToReg<[V0_64, A0_64]>>
-]>;
-
//===----------------------------------------------------------------------===//
// Mips EABI Calling Convention
//===----------------------------------------------------------------------===//
CCIfType<[f32], CCIfSubtarget<"isSingleFloat()",
CCAssignToReg<[F12, F13, F14, F15, F16, F17, F18, F19]>>>,
- CCIfType<[f32], CCIfSubtarget<"isNotSingleFloat()",
+ CCIfType<[f32], CCIfSubtargetNot<"isSingleFloat()",
CCAssignToReg<[F12, F14, F16, F18]>>>,
// The first 4 double fp arguments are passed in single fp registers.
- CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()",
+ CCIfType<[f64], CCIfSubtargetNot<"isSingleFloat()",
CCAssignToReg<[D6, D7, D8, D9]>>>,
// Integer values get stored in stack slots that are 4 bytes in
// Integer values get stored in stack slots that are 8 bytes in
// size and 8-byte aligned.
- CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToStack<8, 8>>>
+ CCIfType<[f64], CCIfSubtargetNot<"isSingleFloat()", CCAssignToStack<8, 8>>>
]>;
def RetCC_MipsEABI : CallingConv<[
CCIfType<[f32], CCAssignToReg<[F0, F1]>>,
// f64 are returned in register D0
- CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToReg<[D0]>>>
+ CCIfType<[f64], CCIfSubtargetNot<"isSingleFloat()", CCAssignToReg<[D0]>>>
]>;
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
def CC_MipsO32_FastCC : CallingConv<[
// f64 arguments are passed in double-precision floating pointer registers.
- CCIfType<[f64], CCIfSubtarget<"isNotFP64bit()",
- CCAssignToReg<[D0, D1, D2, D3, D4, D5, D6, D7,
- D8, D9]>>>,
- CCIfType<[f64], CCIfSubtarget<"isFP64bit()",
+ CCIfType<[f64], CCIfSubtargetNot<"isFP64bit()",
+ CCAssignToReg<[D0, D1, D2, D3, D4, D5, D6,
+ D7, D8, D9]>>>,
+ CCIfType<[f64], CCIfSubtarget<"isFP64bit()", CCIfSubtarget<"useOddSPReg()",
CCAssignToReg<[D0_64, D1_64, D2_64, D3_64,
D4_64, D5_64, D6_64, D7_64,
D8_64, D9_64, D10_64, D11_64,
D12_64, D13_64, D14_64, D15_64,
D16_64, D17_64, D18_64,
- D19_64]>>>,
+ D19_64]>>>>,
+ CCIfType<[f64], CCIfSubtarget<"isFP64bit()", CCIfSubtarget<"noOddSPReg()",
+ CCAssignToReg<[D0_64, D2_64, D4_64, D6_64,
+ D8_64, D10_64, D12_64, D14_64,
+ D16_64, D18_64]>>>>,
// Stack parameter slots for f64 are 64-bit doublewords and 8-byte aligned.
CCIfType<[f64], CCAssignToStack<8, 8>>
// Integer arguments are passed in integer registers. All scratch registers,
// except for AT, V0 and T9, are available to be used as argument registers.
- CCIfType<[i32], CCIfSubtarget<"isNotTargetNaCl()",
+ CCIfType<[i32], CCIfSubtargetNot<"isTargetNaCl()",
CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3, T4, T5, T6, T7, T8, V1]>>>,
// In NaCl, T6, T7 and T8 are reserved and not available as argument
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