//===- X86InstrFPStack.td - FPU Instruction Set ------------*- tablegen -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file describes the X86 x87 FPU instruction set, defining the
// instructions, and properties of the instructions which are needed for code
// generation, machine code emission, and analysis.
//
//===----------------------------------------------------------------------===//
// Some 'special' instructions - expanded after instruction selection.
// Clobbers EFLAGS due to OR instruction used internally.
// FIXME: Can we model this in SelectionDAG?
let usesCustomInserter = 1, hasNoSchedulingInfo = 1, Defs = [EFLAGS] in {
def FP32_TO_INT16_IN_MEM : PseudoI<(outs), (ins i16mem:$dst, RFP32:$src),
[(X86fp_to_i16mem RFP32:$src, addr:$dst)]>;
def FP32_TO_INT32_IN_MEM : PseudoI<(outs), (ins i32mem:$dst, RFP32:$src),
[(X86fp_to_i32mem RFP32:$src, addr:$dst)]>;
def FP32_TO_INT64_IN_MEM : PseudoI<(outs), (ins i64mem:$dst, RFP32:$src),
[(X86fp_to_i64mem RFP32:$src, addr:$dst)]>;
def FP64_TO_INT16_IN_MEM : PseudoI<(outs), (ins i16mem:$dst, RFP64:$src),
[(X86fp_to_i16mem RFP64:$src, addr:$dst)]>;
def FP64_TO_INT32_IN_MEM : PseudoI<(outs), (ins i32mem:$dst, RFP64:$src),
[(X86fp_to_i32mem RFP64:$src, addr:$dst)]>;
def FP64_TO_INT64_IN_MEM : PseudoI<(outs), (ins i64mem:$dst, RFP64:$src),
[(X86fp_to_i64mem RFP64:$src, addr:$dst)]>;
def FP80_TO_INT16_IN_MEM : PseudoI<(outs), (ins i16mem:$dst, RFP80:$src),
[(X86fp_to_i16mem RFP80:$src, addr:$dst)]>;
def FP80_TO_INT32_IN_MEM : PseudoI<(outs), (ins i32mem:$dst, RFP80:$src),
[(X86fp_to_i32mem RFP80:$src, addr:$dst)]>;
def FP80_TO_INT64_IN_MEM : PseudoI<(outs), (ins i64mem:$dst, RFP80:$src),
[(X86fp_to_i64mem RFP80:$src, addr:$dst)]>;
def FP80_ADDr : PseudoI<(outs RFP80:$dst), (ins RFP80:$src1, RFP80:$src2),
[(set RFP80:$dst,
(any_X86fp80_add RFP80:$src1, RFP80:$src2))]>;
def FP80_ADDm32 : PseudoI<(outs RFP80:$dst), (ins RFP80:$src1, f32mem:$src2),
[(set RFP80:$dst,
(any_X86fp80_add RFP80:$src1,
(f80 (extloadf32 addr:$src2))))]>;
}
// All FP Stack operations are represented with four instructions here. The
// first three instructions, generated by the instruction selector, use "RFP32"
// "RFP64" or "RFP80" registers: traditional register files to reference 32-bit,
// 64-bit or 80-bit floating point values. These sizes apply to the values,
// not the registers, which are always 80 bits; RFP32, RFP64 and RFP80 can be
// copied to each other without losing information. These instructions are all
// pseudo instructions and use the "_Fp" suffix.
// In some cases there are additional variants with a mixture of different
// register sizes.
// The second instruction is defined with FPI, which is the actual instruction
// emitted by the assembler. These use "RST" registers, although frequently
// the actual register(s) used are implicit. These are always 80 bits.
// The FP stackifier pass converts one to the other after register allocation
// occurs.
//
// Note that the FpI instruction should have instruction selection info (e.g.
// a pattern) and the FPI instruction should have emission info (e.g. opcode
// encoding and asm printing info).
// FpIf32, FpIf64 - Floating Point Pseudo Instruction template.
// f32 instructions can use SSE1 and are predicated on FPStackf32 == !SSE1.
// f64 instructions can use SSE2 and are predicated on FPStackf64 == !SSE2.
// f80 instructions cannot use SSE and use neither of these.
class FpIf32<dag outs, dag ins, FPFormat fp, list<dag> pattern> :
FpI_<outs, ins, fp, pattern>, Requires<[FPStackf32]>;
class FpIf64<dag outs, dag ins, FPFormat fp, list<dag> pattern> :
FpI_<outs, ins, fp, pattern>, Requires<[FPStackf64]>;
// Factoring for arithmetic.
multiclass FPBinary_rr<SDPatternOperator OpNode> {
// Register op register -> register
// These are separated out because they have no reversed form.
def _Fp32 : FpIf32<(outs RFP32:$dst), (ins RFP32:$src1, RFP32:$src2), TwoArgFP,
[(set RFP32:$dst, (OpNode RFP32:$src1, RFP32:$src2))]>;
def _Fp64 : FpIf64<(outs RFP64:$dst), (ins RFP64:$src1, RFP64:$src2), TwoArgFP,
[(set RFP64:$dst, (OpNode RFP64:$src1, RFP64:$src2))]>;
def _Fp80 : FpI_<(outs RFP80:$dst), (ins RFP80:$src1, RFP80:$src2), TwoArgFP,
[(set RFP80:$dst, (OpNode RFP80:$src1, RFP80:$src2))]>;
}
// The FopST0 series are not included here because of the irregularities
// in where the 'r' goes in assembly output.
// These instructions cannot address 80-bit memory.
multiclass FPBinary<SDPatternOperator OpNode, Format fp, string asmstring,
bit Forward = 1> {
// ST(0) = ST(0) + [mem]
def _Fp32m : FpIf32<(outs RFP32:$dst),
(ins RFP32:$src1, f32mem:$src2), OneArgFPRW,
[!if(Forward,
(set RFP32:$dst,
(OpNode RFP32:$src1, (loadf32 addr:$src2))),
(set RFP32:$dst,
(OpNode (loadf32 addr:$src2), RFP32:$src1)))]>;
def _Fp64m : FpIf64<(outs RFP64:$dst),
(ins RFP64:$src1, f64mem:$src2), OneArgFPRW,
[!if(Forward,
(set RFP64:$dst,
(OpNode RFP64:$src1, (loadf64 addr:$src2))),
(set RFP64:$dst,
(OpNode (loadf64 addr:$src2), RFP64:$src1)))]>;
def _Fp64m32: FpIf64<(outs RFP64:$dst),
(ins RFP64:$src1, f32mem:$src2), OneArgFPRW,
[!if(Forward,
(set RFP64:$dst,
(OpNode RFP64:$src1, (f64 (extloadf32 addr:$src2)))),
(set RFP64:$dst,
(OpNode (f64 (extloadf32 addr:$src2)), RFP64:$src1)))]>;
def _Fp80m32: FpI_<(outs RFP80:$dst),
(ins RFP80:$src1, f32mem:$src2), OneArgFPRW,
[!if(Forward,
(set RFP80:$dst,
(OpNode RFP80:$src1, (f80 (extloadf32 addr:$src2)))),
(set RFP80:$dst,
(OpNode (f80 (extloadf32 addr:$src2)), RFP80:$src1)))]>;
def _Fp80m64: FpI_<(outs RFP80:$dst),
(ins RFP80:$src1, f64mem:$src2), OneArgFPRW,
[!if(Forward,
(set RFP80:$dst,
(OpNode RFP80:$src1, (f80 (extloadf64 addr:$src2)))),
(set RFP80:$dst,
(OpNode (f80 (extloadf64 addr:$src2)), RFP80:$src1)))]>;
let mayLoad = 1 in
def _F32m : FPI<0xD8, fp, (outs), (ins f32mem:$src),
!strconcat("f", asmstring, "{s}\t$src")>;
let mayLoad = 1 in
def _F64m : FPI<0xDC, fp, (outs), (ins f64mem:$src),
!strconcat("f", asmstring, "{l}\t$src")>;
// ST(0) = ST(0) + [memint]
def _FpI16m32 : FpIf32<(outs RFP32:$dst), (ins RFP32:$src1, i16mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP32:$dst,
(OpNode RFP32:$src1, (X86fild16 addr:$src2))),
(set RFP32:$dst,
(OpNode (X86fild16 addr:$src2), RFP32:$src1)))]>;
def _FpI32m32 : FpIf32<(outs RFP32:$dst), (ins RFP32:$src1, i32mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP32:$dst,
(OpNode RFP32:$src1, (X86fild32 addr:$src2))),
(set RFP32:$dst,
(OpNode (X86fild32 addr:$src2), RFP32:$src1)))]>;
def _FpI16m64 : FpIf64<(outs RFP64:$dst), (ins RFP64:$src1, i16mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP64:$dst,
(OpNode RFP64:$src1, (X86fild16 addr:$src2))),
(set RFP64:$dst,
(OpNode (X86fild16 addr:$src2), RFP64:$src1)))]>;
def _FpI32m64 : FpIf64<(outs RFP64:$dst), (ins RFP64:$src1, i32mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP64:$dst,
(OpNode RFP64:$src1, (X86fild32 addr:$src2))),
(set RFP64:$dst,
(OpNode (X86fild32 addr:$src2), RFP64:$src1)))]>;
def _FpI16m80 : FpI_<(outs RFP80:$dst), (ins RFP80:$src1, i16mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP80:$dst,
(OpNode RFP80:$src1, (X86fild16 addr:$src2))),
(set RFP80:$dst,
(OpNode (X86fild16 addr:$src2), RFP80:$src1)))]>;
def _FpI32m80 : FpI_<(outs RFP80:$dst), (ins RFP80:$src1, i32mem:$src2),
OneArgFPRW,
[!if(Forward,
(set RFP80:$dst,
(OpNode RFP80:$src1, (X86fild32 addr:$src2))),
(set RFP80:$dst,
(OpNode (X86fild32 addr:$src2), RFP80:$src1)))]>;
let mayLoad = 1 in
def _FI16m : FPI<0xDE, fp, (outs), (ins i16mem:$src),
!strconcat("fi", asmstring, "{s}\t$src")>;
let mayLoad = 1 in
def _FI32m : FPI<0xDA, fp, (outs), (ins i32mem:$src),
!strconcat("fi", asmstring, "{l}\t$src")>;
}
let Uses = [FPCW], mayRaiseFPException = 1 in {
// FPBinary_rr just defines pseudo-instructions, no need to set a scheduling
// resources.
let hasNoSchedulingInfo = 1 in {
defm ADD : FPBinary_rr<any_fadd>;
defm SUB : FPBinary_rr<any_fsub>;
defm MUL : FPBinary_rr<any_fmul>;
defm DIV : FPBinary_rr<any_fdiv>;
}
// Sets the scheduling resources for the actual NAME#_F<size>m definitions.
let SchedRW = [WriteFAddLd] in {
defm ADD : FPBinary<any_fadd, MRM0m, "add">;
defm SUB : FPBinary<any_fsub, MRM4m, "sub">;
defm SUBR: FPBinary<any_fsub ,MRM5m, "subr", 0>;
}
let SchedRW = [WriteFMulLd] in {
defm MUL : FPBinary<any_fmul, MRM1m, "mul">;
}
let SchedRW = [WriteFDivLd] in {
defm DIV : FPBinary<any_fdiv, MRM6m, "div">;
defm DIVR: FPBinary<any_fdiv, MRM7m, "divr", 0>;
}
} // Uses = [FPCW], mayRaiseFPException = 1
class FPST0rInst<Format fp, string asm>
: FPI<0xD8, fp, (outs), (ins RSTi:$op), asm>;
class FPrST0Inst<Format fp, string asm>
: FPI<0xDC, fp, (outs), (ins RSTi:$op), asm>;
class FPrST0PInst<Format fp, string asm>
: FPI<0xDE, fp, (outs), (ins RSTi:$op), asm>;
// NOTE: GAS and apparently all other AT&T style assemblers have a broken notion
// of some of the 'reverse' forms of the fsub and fdiv instructions. As such,
// we have to put some 'r's in and take them out of weird places.
let SchedRW = [WriteFAdd], Uses = [FPCW], mayRaiseFPException = 1 in {
def ADD_FST0r : FPST0rInst <MRM0r, "fadd\t{$op, %st|st, $op}">;
def ADD_FrST0 : FPrST0Inst <MRM0r, "fadd\t{%st, $op|$op, st}">;
def ADD_FPrST0 : FPrST0PInst<MRM0r, "faddp\t{%st, $op|$op, st}">;
def SUBR_FST0r : FPST0rInst <MRM5r, "fsubr\t{$op, %st|st, $op}">;
def SUB_FrST0 : FPrST0Inst <MRM5r, "fsub{r}\t{%st, $op|$op, st}">;
def SUB_FPrST0 : FPrST0PInst<MRM5r, "fsub{r}p\t{%st, $op|$op, st}">;
def SUB_FST0r : FPST0rInst <MRM4r, "fsub\t{$op, %st|st, $op}">;
def SUBR_FrST0 : FPrST0Inst <MRM4r, "fsub{|r}\t{%st, $op|$op, st}">;
def SUBR_FPrST0 : FPrST0PInst<MRM4r, "fsub{|r}p\t{%st, $op|$op, st}">;
} // SchedRW
let SchedRW = [WriteFCom], Uses = [FPCW], mayRaiseFPException = 1 in {
def COM_FST0r : FPST0rInst <MRM2r, "fcom\t$op">;
def COMP_FST0r : FPST0rInst <MRM3r, "fcomp\t$op">;
} // SchedRW
let SchedRW = [WriteFMul], Uses = [FPCW], mayRaiseFPException = 1 in {
def MUL_FST0r : FPST0rInst <MRM1r, "fmul\t{$op, %st|st, $op}">;
def MUL_FrST0 : FPrST0Inst <MRM1r, "fmul\t{%st, $op|$op, st}">;
def MUL_FPrST0 : FPrST0PInst<MRM1r, "fmulp\t{%st, $op|$op, st}">;
} // SchedRW
let SchedRW = [WriteFDiv], Uses = [FPCW], mayRaiseFPException = 1 in {
def DIVR_FST0r : FPST0rInst <MRM7r, "fdivr\t{$op, %st|st, $op}">;
def DIV_FrST0 : FPrST0Inst <MRM7r, "fdiv{r}\t{%st, $op|$op, st}">;
def DIV_FPrST0 : FPrST0PInst<MRM7r, "fdiv{r}p\t{%st, $op|$op, st}">;
def DIV_FST0r : FPST0rInst <MRM6r, "fdiv\t{$op, %st|st, $op}">;
def DIVR_FrST0 : FPrST0Inst <MRM6r, "fdiv{|r}\t{%st, $op|$op, st}">;
def DIVR_FPrST0 : FPrST0PInst<MRM6r, "fdiv{|r}p\t{%st, $op|$op, st}">;
} // SchedRW
// Unary operations.
multiclass FPUnary<SDPatternOperator OpNode, Format fp, string asmstring> {
def _Fp32 : FpIf32<(outs RFP32:$dst), (ins RFP32:$src), OneArgFPRW,
[(set RFP32:$dst, (OpNode RFP32:$src))]>;
def _Fp64 : FpIf64<(outs RFP64:$dst), (ins RFP64:$src), OneArgFPRW,
[(set RFP64:$dst, (OpNode RFP64:$src))]>;
def _Fp80 : FpI_<(outs RFP80:$dst), (ins RFP80:$src), OneArgFPRW,
[(set RFP80:$dst, (OpNode RFP80:$src))]>;
def _F : FPI<0xD9, fp, (outs), (ins), asmstring>;
}
let SchedRW = [WriteFSign] in {
defm CHS : FPUnary<fneg, MRM_E0, "fchs">;
defm ABS : FPUnary<fabs, MRM_E1, "fabs">;
}
let Uses = [FPCW], mayRaiseFPException = 1 in {
let SchedRW = [WriteFSqrt80] in
defm SQRT: FPUnary<any_fsqrt,MRM_FA, "fsqrt">;
let SchedRW = [WriteFCom] in {
let hasSideEffects = 0 in {
def TST_Fp32 : FpIf32<(outs), (ins RFP32:$src), OneArgFP, []>;
def TST_Fp64 : FpIf64<(outs), (ins RFP64:$src), OneArgFP, []>;
def TST_Fp80 : FpI_<(outs), (ins RFP80:$src), OneArgFP, []>;
} // hasSideEffects
def TST_F : FPI<0xD9, MRM_E4, (outs), (ins), "ftst">;
} // SchedRW
} // Uses = [FPCW], mayRaiseFPException = 1
let SchedRW = [WriteFTest], Defs = [FPSW] in {
def XAM_Fp32 : FpIf32<(outs), (ins RFP32:$src), OneArgFP, []>;
def XAM_Fp64 : FpIf64<(outs), (ins RFP64:$src), OneArgFP, []>;
def XAM_Fp80 : FpI_<(outs), (ins RFP80:$src), OneArgFP, []>;
def XAM_F : FPI<0xD9, MRM_E5, (outs), (ins), "fxam">;
} // SchedRW
// Versions of FP instructions that take a single memory operand. Added for the
// disassembler; remove as they are included with patterns elsewhere.
let SchedRW = [WriteFComLd], Uses = [FPCW], mayRaiseFPException = 1,
mayLoad = 1 in {
def FCOM32m : FPI<0xD8, MRM2m, (outs), (ins f32mem:$src), "fcom{s}\t$src">;
def FCOMP32m : FPI<0xD8, MRM3m, (outs), (ins f32mem:$src), "fcomp{s}\t$src">;
def FCOM64m : FPI<0xDC, MRM2m, (outs), (ins f64mem:$src), "fcom{l}\t$src">;
def FCOMP64m : FPI<0xDC, MRM3m, (outs), (ins f64mem:$src), "fcomp{l}\t$src">;
def FICOM16m : FPI<0xDE, MRM2m, (outs), (ins i16mem:$src), "ficom{s}\t$src">;
def FICOMP16m: FPI<0xDE, MRM3m, (outs), (ins i16mem:$src), "ficomp{s}\t$src">;
def FICOM32m : FPI<0xDA, MRM2m, (outs), (ins i32mem:$src), "ficom{l}\t$src">;
def FICOMP32m: FPI<0xDA, MRM3m, (outs), (ins i32mem:$src), "ficomp{l}\t$src">;
} // SchedRW
let SchedRW = [WriteMicrocoded] in {
let Defs = [FPSW, FPCW], mayLoad = 1 in {
def FRSTORm : FPI<0xDD, MRM4m, (outs), (ins anymem:$src), "frstor\t$src">;
let Predicates = [HasX87] in
def FLDENVm : I<0xD9, MRM4m, (outs), (ins anymem:$src), "fldenv\t$src",
[(X86fpenv_set addr:$src)]>;
}
let Defs = [FPSW, FPCW], Uses = [FPSW, FPCW], mayStore = 1 in {
def FSAVEm : FPI<0xDD, MRM6m, (outs), (ins anymem:$dst), "fnsave\t$dst">;
let Predicates = [HasX87] in
def FSTENVm : I<0xD9, MRM6m, (outs), (ins anymem:$dst), "fnstenv\t$dst",
[(X86fpenv_get addr:$dst)]>;
}
let Uses = [FPSW], mayStore = 1 in
def FNSTSWm : FPI<0xDD, MRM7m, (outs), (ins i16mem:$dst), "fnstsw\t$dst">;
let mayLoad = 1 in
def FBLDm : FPI<0xDF, MRM4m, (outs), (ins f80mem:$src), "fbld\t$src">;
let Uses = [FPCW] ,mayRaiseFPException = 1, mayStore = 1 in
def FBSTPm : FPI<0xDF, MRM6m, (outs), (ins f80mem:$dst), "fbstp\t$dst">;
} // SchedRW
// Floating point cmovs.
class FpIf32CMov<dag outs, dag ins, FPFormat fp, list<dag> pattern> :
FpI_<outs, ins, fp, pattern>, Requires<[FPStackf32, HasCMOV]>;
class FpIf64CMov<dag outs, dag ins, FPFormat fp, list<dag> pattern> :
FpI_<outs, ins, fp, pattern>, Requires<[FPStackf64, HasCMOV]>;
multiclass FPCMov<PatLeaf cc> {
def _Fp32 : FpIf32CMov<(outs RFP32:$dst), (ins RFP32:$src1, RFP32:$src2),
CondMovFP,
[(set RFP32:$dst, (X86cmov RFP32:$src1, RFP32:$src2,
cc, EFLAGS))]>;
def _Fp64 : FpIf64CMov<(outs RFP64:$dst), (ins RFP64:$src1, RFP64:$src2),
CondMovFP,
[(set RFP64:$dst, (X86cmov RFP64:$src1, RFP64:$src2,
cc, EFLAGS))]>;
def _Fp80 : FpI_<(outs RFP80:$dst), (ins RFP80:$src1, RFP80:$src2),
CondMovFP,
[(set RFP80:$dst, (X86cmov RFP80:$src1, RFP80:$src2,
cc, EFLAGS))]>,
Requires<[HasCMOV]>;
}
let SchedRW = [WriteFCMOV] in {
let Uses = [EFLAGS], Constraints = "$src1 = $dst" in {
defm CMOVB : FPCMov<X86_COND_B>;
defm CMOVBE : FPCMov<X86_COND_BE>;
defm CMOVE : FPCMov<X86_COND_E>;
defm CMOVP : FPCMov<X86_COND_P>;
defm CMOVNB : FPCMov<X86_COND_AE>;
defm CMOVNBE: FPCMov<X86_COND_A>;
defm CMOVNE : FPCMov<X86_COND_NE>;
defm CMOVNP : FPCMov<X86_COND_NP>;
} // Uses = [EFLAGS], Constraints = "$src1 = $dst"
let Predicates = [HasCMOV] in {
// These are not factored because there's no clean way to pass DA/DB.
def CMOVB_F : FPI<0xDA, MRM0r, (outs), (ins RSTi:$op),
"fcmovb\t{$op, %st|st, $op}">;
def CMOVBE_F : FPI<0xDA, MRM2r, (outs), (ins RSTi:$op),
"fcmovbe\t{$op, %st|st, $op}">;
def CMOVE_F : FPI<0xDA, MRM1r, (outs), (ins RSTi:$op),
"fcmove\t{$op, %st|st, $op}">;
def CMOVP_F : FPI<0xDA, MRM3r, (outs), (ins RSTi:$op),
"fcmovu\t{$op, %st|st, $op}">;
def CMOVNB_F : FPI<0xDB, MRM0r, (outs), (ins RSTi:$op),
"fcmovnb\t{$op, %st|st, $op}">;
def CMOVNBE_F: FPI<0xDB, MRM2r, (outs), (ins RSTi:$op),
"fcmovnbe\t{$op, %st|st, $op}">;
def CMOVNE_F : FPI<0xDB, MRM1r, (outs), (ins RSTi:$op),
"fcmovne\t{$op, %st|st, $op}">;
def CMOVNP_F : FPI<0xDB, MRM3r, (outs), (ins RSTi:$op),
"fcmovnu\t{$op, %st|st, $op}">;
} // Predicates = [HasCMOV]
} // SchedRW
let mayRaiseFPException = 1 in {
// Floating point loads & stores.
let SchedRW = [WriteLoad], Uses = [FPCW] in {
let canFoldAsLoad = 1 in {
def LD_Fp32m : FpIf32<(outs RFP32:$dst), (ins f32mem:$src), ZeroArgFP,
[(set RFP32:$dst, (loadf32 addr:$src))]>;
def LD_Fp64m : FpIf64<(outs RFP64:$dst), (ins f64mem:$src), ZeroArgFP,
[(set RFP64:$dst, (loadf64 addr:$src))]>;
def LD_Fp80m : FpI_<(outs RFP80:$dst), (ins f80mem:$src), ZeroArgFP,
[(set RFP80:$dst, (loadf80 addr:$src))]>;
} // canFoldAsLoad
def LD_Fp32m64 : FpIf64<(outs RFP64:$dst), (ins f32mem:$src), ZeroArgFP,
[(set RFP64:$dst, (f64 (extloadf32 addr:$src)))]>;
def LD_Fp64m80 : FpI_<(outs RFP80:$dst), (ins f64mem:$src), ZeroArgFP,
[(set RFP80:$dst, (f80 (extloadf64 addr:$src)))]>;
def LD_Fp32m80 : FpI_<(outs RFP80:$dst), (ins f32mem:$src), ZeroArgFP,
[(set RFP80:$dst, (f80 (extloadf32 addr:$src)))]>;
let mayRaiseFPException = 0 in {
def ILD_Fp16m32: FpIf32<(outs RFP32:$dst), (ins i16mem:$src), ZeroArgFP,
[(set RFP32:$dst, (X86fild16 addr:$src))]>;
def ILD_Fp32m32: FpIf32<(outs RFP32:$dst), (ins i32mem:$src), ZeroArgFP,
[(set RFP32:$dst, (X86fild32 addr:$src))]>;
def ILD_Fp64m32: FpIf32<(outs RFP32:$dst), (ins i64mem:$src), ZeroArgFP,
[(set RFP32:$dst, (X86fild64 addr:$src))]>;
def ILD_Fp16m64: FpIf64<(outs RFP64:$dst), (ins i16mem:$src), ZeroArgFP,
[(set RFP64:$dst, (X86fild16 addr:$src))]>;
def ILD_Fp32m64: FpIf64<(outs RFP64:$dst), (ins i32mem:$src), ZeroArgFP,
[(set RFP64:$dst, (X86fild32 addr:$src))]>;
def ILD_Fp64m64: FpIf64<(outs RFP64:$dst), (ins i64mem:$src), ZeroArgFP,
[(set RFP64:$dst, (X86fild64 addr:$src))]>;
def ILD_Fp16m80: FpI_<(outs RFP80:$dst), (ins i16mem:$src), ZeroArgFP,
[(set RFP80:$dst, (X86fild16 addr:$src))]>;
def ILD_Fp32m80: FpI_<(outs RFP80:$dst), (ins i32mem:$src), ZeroArgFP,
[(set RFP80:$dst, (X86fild32 addr:$src))]>;
def ILD_Fp64m80: FpI_<(outs RFP80:$dst), (ins i64mem:$src), ZeroArgFP,
[(set RFP80:$dst, (X86fild64 addr:$src))]>;
} // mayRaiseFPException = 0
} // SchedRW
let SchedRW = [WriteStore], Uses = [FPCW] in {
def ST_Fp32m : FpIf32<(outs), (ins f32mem:$op, RFP32:$src), OneArgFP,
[(store RFP32:$src, addr:$op)]>;
def ST_Fp64m32 : FpIf64<(outs), (ins f32mem:$op, RFP64:$src), OneArgFP,
[(truncstoref32 RFP64:$src, addr:$op)]>;
def ST_Fp64m : FpIf64<(outs), (ins f64mem:$op, RFP64:$src), OneArgFP,
[(store RFP64:$src, addr:$op)]>;
def ST_Fp80m32 : FpI_<(outs), (ins f32mem:$op, RFP80:$src), OneArgFP,
[(truncstoref32 RFP80:$src, addr:$op)]>;
def ST_Fp80m64 : FpI_<(outs), (ins f64mem:$op, RFP80:$src), OneArgFP,
[(truncstoref64 RFP80:$src, addr:$op)]>;
// FST does not support 80-bit memory target; FSTP must be used.
let mayStore = 1, hasSideEffects = 0 in {
def ST_FpP32m : FpIf32<(outs), (ins f32mem:$op, RFP32:$src), OneArgFP, []>;
def ST_FpP64m32 : FpIf64<(outs), (ins f32mem:$op, RFP64:$src), OneArgFP, []>;
def ST_FpP64m : FpIf64<(outs), (ins f64mem:$op, RFP64:$src), OneArgFP, []>;
def ST_FpP80m32 : FpI_<(outs), (ins f32mem:$op, RFP80:$src), OneArgFP, []>;
def ST_FpP80m64 : FpI_<(outs), (ins f64mem:$op, RFP80:$src), OneArgFP, []>;
} // mayStore
def ST_FpP80m : FpI_<(outs), (ins f80mem:$op, RFP80:$src), OneArgFP,
[(store RFP80:$src, addr:$op)]>;
let mayStore = 1, hasSideEffects = 0 in {
def IST_Fp16m32 : FpIf32<(outs), (ins i16mem:$op, RFP32:$src), OneArgFP, []>;
def IST_Fp32m32 : FpIf32<(outs), (ins i32mem:$op, RFP32:$src), OneArgFP,
[(X86fist32 RFP32:$src, addr:$op)]>;
def IST_Fp64m32 : FpIf32<(outs), (ins i64mem:$op, RFP32:$src), OneArgFP,
[(X86fist64 RFP32:$src, addr:$op)]>;
def IST_Fp16m64 : FpIf64<(outs), (ins i16mem:$op, RFP64:$src), OneArgFP, []>;
def IST_Fp32m64 : FpIf64<(outs), (ins i32mem:$op, RFP64:$src), OneArgFP,
[(X86fist32 RFP64:$src, addr:$op)]>;
def IST_Fp64m64 : FpIf64<(outs), (ins i64mem:$op, RFP64:$src), OneArgFP,
[(X86fist64 RFP64:$src, addr:$op)]>;
def IST_Fp16m80 : FpI_<(outs), (ins i16mem:$op, RFP80:$src), OneArgFP, []>;
def IST_Fp32m80 : FpI_<(outs), (ins i32mem:$op, RFP80:$src), OneArgFP,
[(X86fist32 RFP80:$src, addr:$op)]>;
def IST_Fp64m80 : FpI_<(outs), (ins i64mem:$op, RFP80:$src), OneArgFP,
[(X86fist64 RFP80:$src, addr:$op)]>;
} // mayStore
} // SchedRW, Uses = [FPCW]
let mayLoad = 1, SchedRW = [WriteLoad], Uses = [FPCW] in {
def LD_F32m : FPI<0xD9, MRM0m, (outs), (ins f32mem:$src), "fld{s}\t$src">;
def LD_F64m : FPI<0xDD, MRM0m, (outs), (ins f64mem:$src), "fld{l}\t$src">;
def LD_F80m : FPI<0xDB, MRM5m, (outs), (ins f80mem:$src), "fld{t}\t$src">;
let mayRaiseFPException = 0 in {
def ILD_F16m : FPI<0xDF, MRM0m, (outs), (ins i16mem:$src), "fild{s}\t$src">;
def ILD_F32m : FPI<0xDB, MRM0m, (outs), (ins i32mem:$src), "fild{l}\t$src">;
def ILD_F64m : FPI<0xDF, MRM5m, (outs), (ins i64mem:$src), "fild{ll}\t$src">;
}
}
let mayStore = 1, SchedRW = [WriteStore], Uses = [FPCW] in {
def ST_F32m : FPI<0xD9, MRM2m, (outs), (ins f32mem:$dst), "fst{s}\t$dst">;
def ST_F64m : FPI<0xDD, MRM2m, (outs), (ins f64mem:$dst), "fst{l}\t$dst">;
def ST_FP32m : FPI<0xD9, MRM3m, (outs), (ins f32mem:$dst), "fstp{s}\t$dst">;
def ST_FP64m : FPI<0xDD, MRM3m, (outs), (ins f64mem:$dst), "fstp{l}\t$dst">;
def ST_FP80m : FPI<0xDB, MRM7m, (outs), (ins f80mem:$dst), "fstp{t}\t$dst">;
def IST_F16m : FPI<0xDF, MRM2m, (outs), (ins i16mem:$dst), "fist{s}\t$dst">;
def IST_F32m : FPI<0xDB, MRM2m, (outs), (ins i32mem:$dst), "fist{l}\t$dst">;
def IST_FP16m : FPI<0xDF, MRM3m, (outs), (ins i16mem:$dst), "fistp{s}\t$dst">;
def IST_FP32m : FPI<0xDB, MRM3m, (outs), (ins i32mem:$dst), "fistp{l}\t$dst">;
def IST_FP64m : FPI<0xDF, MRM7m, (outs), (ins i64mem:$dst), "fistp{ll}\t$dst">;
}
// FISTTP requires SSE3 even though it's a FPStack op.
let Predicates = [HasSSE3], SchedRW = [WriteStore], Uses = [FPCW] in {
def ISTT_Fp16m32 : FpI_<(outs), (ins i16mem:$op, RFP32:$src), OneArgFP,
[(X86fp_to_i16mem RFP32:$src, addr:$op)]>;
def ISTT_Fp32m32 : FpI_<(outs), (ins i32mem:$op, RFP32:$src), OneArgFP,
[(X86fp_to_i32mem RFP32:$src, addr:$op)]>;
def ISTT_Fp64m32 : FpI_<(outs), (ins i64mem:$op, RFP32:$src), OneArgFP,
[(X86fp_to_i64mem RFP32:$src, addr:$op)]>;
def ISTT_Fp16m64 : FpI_<(outs), (ins i16mem:$op, RFP64:$src), OneArgFP,
[(X86fp_to_i16mem RFP64:$src, addr:$op)]>;
def ISTT_Fp32m64 : FpI_<(outs), (ins i32mem:$op, RFP64:$src), OneArgFP,
[(X86fp_to_i32mem RFP64:$src, addr:$op)]>;
def ISTT_Fp64m64 : FpI_<(outs), (ins i64mem:$op, RFP64:$src), OneArgFP,
[(X86fp_to_i64mem RFP64:$src, addr:$op)]>;
def ISTT_Fp16m80 : FpI_<(outs), (ins i16mem:$op, RFP80:$src), OneArgFP,
[(X86fp_to_i16mem RFP80:$src, addr:$op)]>;
def ISTT_Fp32m80 : FpI_<(outs), (ins i32mem:$op, RFP80:$src), OneArgFP,
[(X86fp_to_i32mem RFP80:$src, addr:$op)]>;
def ISTT_Fp64m80 : FpI_<(outs), (ins i64mem:$op, RFP80:$src), OneArgFP,
[(X86fp_to_i64mem RFP80:$src, addr:$op)]>;
} // Predicates = [HasSSE3]
let mayStore = 1, SchedRW = [WriteStore], Uses = [FPCW] in {
def ISTT_FP16m : FPI<0xDF, MRM1m, (outs), (ins i16mem:$dst), "fisttp{s}\t$dst">;
def ISTT_FP32m : FPI<0xDB, MRM1m, (outs), (ins i32mem:$dst), "fisttp{l}\t$dst">;
def ISTT_FP64m : FPI<0xDD, MRM1m, (outs), (ins i64mem:$dst), "fisttp{ll}\t$dst">;
}
// FP Stack manipulation instructions.
let SchedRW = [WriteMove], Uses = [FPCW] in {
def LD_Frr : FPI<0xD9, MRM0r, (outs), (ins RSTi:$op), "fld\t$op">;
def ST_Frr : FPI<0xDD, MRM2r, (outs), (ins RSTi:$op), "fst\t$op">;
def ST_FPrr : FPI<0xDD, MRM3r, (outs), (ins RSTi:$op), "fstp\t$op">;
let mayRaiseFPException = 0 in
def XCH_F : FPI<0xD9, MRM1r, (outs), (ins RSTi:$op), "fxch\t$op">;
}
// Floating point constant loads.
let SchedRW = [WriteZero], Uses = [FPCW], isReMaterializable = 1 in {
def LD_Fp032 : FpIf32<(outs RFP32:$dst), (ins), ZeroArgFP,
[(set RFP32:$dst, fpimm0)]>;
def LD_Fp132 : FpIf32<(outs RFP32:$dst), (ins), ZeroArgFP,
[(set RFP32:$dst, fpimm1)]>;
def LD_Fp064 : FpIf64<(outs RFP64:$dst), (ins), ZeroArgFP,
[(set RFP64:$dst, fpimm0)]>;
def LD_Fp164 : FpIf64<(outs RFP64:$dst), (ins), ZeroArgFP,
[(set RFP64:$dst, fpimm1)]>;
def LD_Fp080 : FpI_<(outs RFP80:$dst), (ins), ZeroArgFP,
[(set RFP80:$dst, fpimm0)]>;
def LD_Fp180 : FpI_<(outs RFP80:$dst), (ins), ZeroArgFP,
[(set RFP80:$dst, fpimm1)]>;
}
let SchedRW = [WriteFLD0], Uses = [FPCW], mayRaiseFPException = 0 in
def LD_F0 : FPI<0xD9, MRM_EE, (outs), (ins), "fldz">;
let SchedRW = [WriteFLD1], Uses = [FPCW], mayRaiseFPException = 0 in
def LD_F1 : FPI<0xD9, MRM_E8, (outs), (ins), "fld1">;
let SchedRW = [WriteFLDC], Defs = [FPSW], Uses = [FPCW], mayRaiseFPException = 0 in {
def FLDL2T : I<0xD9, MRM_E9, (outs), (ins), "fldl2t", []>;
def FLDL2E : I<0xD9, MRM_EA, (outs), (ins), "fldl2e", []>;
def FLDPI : I<0xD9, MRM_EB, (outs), (ins), "fldpi", []>;
def FLDLG2 : I<0xD9, MRM_EC, (outs), (ins), "fldlg2", []>;
def FLDLN2 : I<0xD9, MRM_ED, (outs), (ins), "fldln2", []>;
} // SchedRW
// Floating point compares.
let SchedRW = [WriteFCom], Uses = [FPCW], hasSideEffects = 0 in {
def UCOM_Fpr32 : FpIf32<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP, []>;
def UCOM_Fpr64 : FpIf64<(outs), (ins RFP64:$lhs, RFP64:$rhs), CompareFP, []>;
def UCOM_Fpr80 : FpI_ <(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP, []>;
def COM_Fpr32 : FpIf32<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP, []>;
def COM_Fpr64 : FpIf64<(outs), (ins RFP64:$lhs, RFP64:$rhs), CompareFP, []>;
def COM_Fpr80 : FpI_ <(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP, []>;
} // SchedRW
} // mayRaiseFPException = 1
let SchedRW = [WriteFCom], mayRaiseFPException = 1 in {
// CC = ST(0) cmp ST(i)
let Defs = [EFLAGS, FPSW], Uses = [FPCW] in {
def UCOM_FpIr32: FpI_<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP,
[(set EFLAGS, (X86any_fcmp RFP32:$lhs, RFP32:$rhs))]>,
Requires<[FPStackf32, HasCMOV]>;
def UCOM_FpIr64: FpI_<(outs), (ins RFP64:$lhs, RFP64:$rhs), CompareFP,
[(set EFLAGS, (X86any_fcmp RFP64:$lhs, RFP64:$rhs))]>,
Requires<[FPStackf64, HasCMOV]>;
def UCOM_FpIr80: FpI_<(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
[(set EFLAGS, (X86any_fcmp RFP80:$lhs, RFP80:$rhs))]>,
Requires<[HasCMOV]>;
def COM_FpIr32: FpI_<(outs), (ins RFP32:$lhs, RFP32:$rhs), CompareFP,
[(set EFLAGS, (X86strict_fcmps RFP32:$lhs, RFP32:$rhs))]>,
Requires<[FPStackf32, HasCMOV]>;
def COM_FpIr64: FpI_<(outs), (ins RFP64:$lhs, RFP64:$rhs), CompareFP,
[(set EFLAGS, (X86strict_fcmps RFP64:$lhs, RFP64:$rhs))]>,
Requires<[FPStackf64, HasCMOV]>;
def COM_FpIr80: FpI_<(outs), (ins RFP80:$lhs, RFP80:$rhs), CompareFP,
[(set EFLAGS, (X86strict_fcmps RFP80:$lhs, RFP80:$rhs))]>,
Requires<[HasCMOV]>;
}
let Uses = [ST0, FPCW] in {
def UCOM_Fr : FPI<0xDD, MRM4r, // FPSW = cmp ST(0) with ST(i)
(outs), (ins RSTi:$reg), "fucom\t$reg">;
def UCOM_FPr : FPI<0xDD, MRM5r, // FPSW = cmp ST(0) with ST(i), pop
(outs), (ins RSTi:$reg), "fucomp\t$reg">;
def UCOM_FPPr : FPI<0xDA, MRM_E9, // cmp ST(0) with ST(1), pop, pop
(outs), (ins), "fucompp">;
}
let Defs = [EFLAGS, FPSW], Uses = [ST0, FPCW] in {
def UCOM_FIr : FPI<0xDB, MRM5r, // CC = cmp ST(0) with ST(i)
(outs), (ins RSTi:$reg), "fucomi\t{$reg, %st|st, $reg}">;
def UCOM_FIPr : FPI<0xDF, MRM5r, // CC = cmp ST(0) with ST(i), pop
(outs), (ins RSTi:$reg), "fucompi\t{$reg, %st|st, $reg}">;
def COM_FIr : FPI<0xDB, MRM6r, (outs), (ins RSTi:$reg),
"fcomi\t{$reg, %st|st, $reg}">;
def COM_FIPr : FPI<0xDF, MRM6r, (outs), (ins RSTi:$reg),
"fcompi\t{$reg, %st|st, $reg}">;
}
} // SchedRW
// Floating point flag ops.
let SchedRW = [WriteALU] in {
let Defs = [AX, FPSW], Uses = [FPSW], hasSideEffects = 0 in
def FNSTSW16r : I<0xDF, MRM_E0, // AX = fp flags
(outs), (ins), "fnstsw\t{%ax|ax}", []>;
let Defs = [FPSW], Uses = [FPCW] in
def FNSTCW16m : I<0xD9, MRM7m, // [mem16] = X87 control world
(outs), (ins i16mem:$dst), "fnstcw\t$dst",
[(X86fp_cwd_get16 addr:$dst)]>;
} // SchedRW
let Defs = [FPSW,FPCW], mayLoad = 1 in
def FLDCW16m : I<0xD9, MRM5m, // X87 control world = [mem16]
(outs), (ins i16mem:$dst), "fldcw\t$dst",
[(X86fp_cwd_set16 addr:$dst)]>,
Sched<[WriteLoad]>;
// FPU control instructions
let SchedRW = [WriteMicrocoded] in {
def FFREE : FPI<0xDD, MRM0r, (outs), (ins RSTi:$reg), "ffree\t$reg">;
def FFREEP : FPI<0xDF, MRM0r, (outs), (ins RSTi:$reg), "ffreep\t$reg">;
let Defs = [FPSW, FPCW] in
def FNINIT : I<0xDB, MRM_E3, (outs), (ins), "fninit", []>;
// Clear exceptions
let Defs = [FPSW] in
def FNCLEX : I<0xDB, MRM_E2, (outs), (ins), "fnclex", []>;
} // SchedRW
// Operand-less floating-point instructions for the disassembler.
let Defs = [FPSW] in
def FNOP : I<0xD9, MRM_D0, (outs), (ins), "fnop", []>, Sched<[WriteNop]>;
let SchedRW = [WriteMicrocoded] in {
let Defs = [FPSW] in {
def WAIT : I<0x9B, RawFrm, (outs), (ins), "wait", []>;
def FDECSTP : I<0xD9, MRM_F6, (outs), (ins), "fdecstp", []>;
def FINCSTP : I<0xD9, MRM_F7, (outs), (ins), "fincstp", []>;
let Uses = [FPCW], mayRaiseFPException = 1 in {
def F2XM1 : I<0xD9, MRM_F0, (outs), (ins), "f2xm1", []>;
def FYL2X : I<0xD9, MRM_F1, (outs), (ins), "fyl2x", []>;
def FPTAN : I<0xD9, MRM_F2, (outs), (ins), "fptan", []>;
def FPATAN : I<0xD9, MRM_F3, (outs), (ins), "fpatan", []>;
def FXTRACT : I<0xD9, MRM_F4, (outs), (ins), "fxtract", []>;
def FPREM1 : I<0xD9, MRM_F5, (outs), (ins), "fprem1", []>;
def FPREM : I<0xD9, MRM_F8, (outs), (ins), "fprem", []>;
def FYL2XP1 : I<0xD9, MRM_F9, (outs), (ins), "fyl2xp1", []>;
def FSIN : I<0xD9, MRM_FE, (outs), (ins), "fsin", []>;
def FCOS : I<0xD9, MRM_FF, (outs), (ins), "fcos", []>;
def FSINCOS : I<0xD9, MRM_FB, (outs), (ins), "fsincos", []>;
def FRNDINT : I<0xD9, MRM_FC, (outs), (ins), "frndint", []>;
def FSCALE : I<0xD9, MRM_FD, (outs), (ins), "fscale", []>;
def FCOMPP : I<0xDE, MRM_D9, (outs), (ins), "fcompp", []>;
} // Uses = [FPCW], mayRaiseFPException = 1
} // Defs = [FPSW]
let Uses = [FPSW, FPCW] in {
def FXSAVE : I<0xAE, MRM0m, (outs), (ins opaquemem:$dst),
"fxsave\t$dst", [(int_x86_fxsave addr:$dst)]>, TB,
Requires<[HasFXSR]>;
def FXSAVE64 : RI<0xAE, MRM0m, (outs), (ins opaquemem:$dst),
"fxsave64\t$dst", [(int_x86_fxsave64 addr:$dst)]>,
TB, Requires<[HasFXSR, In64BitMode]>;
} // Uses = [FPSW, FPCW]
let Defs = [FPSW, FPCW] in {
def FXRSTOR : I<0xAE, MRM1m, (outs), (ins opaquemem:$src),
"fxrstor\t$src", [(int_x86_fxrstor addr:$src)]>,
TB, Requires<[HasFXSR]>;
def FXRSTOR64 : RI<0xAE, MRM1m, (outs), (ins opaquemem:$src),
"fxrstor64\t$src", [(int_x86_fxrstor64 addr:$src)]>,
TB, Requires<[HasFXSR, In64BitMode]>;
} // Defs = [FPSW, FPCW]
} // SchedRW
//===----------------------------------------------------------------------===//
// Non-Instruction Patterns
//===----------------------------------------------------------------------===//
// Required for RET of f32 / f64 / f80 values.
def : Pat<(X86fldf32 addr:$src), (LD_Fp32m addr:$src)>;
def : Pat<(X86fldf32 addr:$src), (LD_Fp32m64 addr:$src)>;
def : Pat<(X86fldf64 addr:$src), (LD_Fp64m addr:$src)>;
def : Pat<(X86fldf32 addr:$src), (LD_Fp32m80 addr:$src)>;
def : Pat<(X86fldf64 addr:$src), (LD_Fp64m80 addr:$src)>;
def : Pat<(X86fldf80 addr:$src), (LD_Fp80m addr:$src)>;
// Required for CALL which return f32 / f64 / f80 values.
def : Pat<(X86fstf32 RFP32:$src, addr:$op), (ST_Fp32m addr:$op, RFP32:$src)>;
def : Pat<(X86fstf32 RFP64:$src, addr:$op), (ST_Fp64m32 addr:$op, RFP64:$src)>;
def : Pat<(X86fstf64 RFP64:$src, addr:$op), (ST_Fp64m addr:$op, RFP64:$src)>;
def : Pat<(X86fstf32 RFP80:$src, addr:$op), (ST_Fp80m32 addr:$op, RFP80:$src)>;
def : Pat<(X86fstf64 RFP80:$src, addr:$op), (ST_Fp80m64 addr:$op, RFP80:$src)>;
def : Pat<(X86fstf80 RFP80:$src, addr:$op), (ST_FpP80m addr:$op, RFP80:$src)>;
// Floating point constant -0.0 and -1.0
def : Pat<(f32 fpimmneg0), (CHS_Fp32 (LD_Fp032))>, Requires<[FPStackf32]>;
def : Pat<(f32 fpimmneg1), (CHS_Fp32 (LD_Fp132))>, Requires<[FPStackf32]>;
def : Pat<(f64 fpimmneg0), (CHS_Fp64 (LD_Fp064))>, Requires<[FPStackf64]>;
def : Pat<(f64 fpimmneg1), (CHS_Fp64 (LD_Fp164))>, Requires<[FPStackf64]>;
def : Pat<(f80 fpimmneg0), (CHS_Fp80 (LD_Fp080))>;
def : Pat<(f80 fpimmneg1), (CHS_Fp80 (LD_Fp180))>;
// FP extensions map onto simple pseudo-value conversions if they are to/from
// the FP stack.
def : Pat<(f64 (any_fpextend RFP32:$src)), (COPY_TO_REGCLASS RFP32:$src, RFP64)>,
Requires<[FPStackf32]>;
def : Pat<(f80 (any_fpextend RFP32:$src)), (COPY_TO_REGCLASS RFP32:$src, RFP80)>,
Requires<[FPStackf32]>;
def : Pat<(f80 (any_fpextend RFP64:$src)), (COPY_TO_REGCLASS RFP64:$src, RFP80)>,
Requires<[FPStackf64]>;
// FP truncations map onto simple pseudo-value conversions if they are to/from
// the FP stack. We have validated that only value-preserving truncations make
// it through isel.
def : Pat<(f32 (any_fpround RFP64:$src)), (COPY_TO_REGCLASS RFP64:$src, RFP32)>,
Requires<[FPStackf32]>;
def : Pat<(f32 (any_fpround RFP80:$src)), (COPY_TO_REGCLASS RFP80:$src, RFP32)>,
Requires<[FPStackf32]>;
def : Pat<(f64 (any_fpround RFP80:$src)), (COPY_TO_REGCLASS RFP80:$src, RFP64)>,
Requires<[FPStackf64]>;
Codebase Browser
llvm