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[LoongArch] Make ISD::FSQRT a legal operation with lsx/lasx feature (#…
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…74795)

And add some patterns:
1. (fdiv 1.0, vector)
2. (fdiv 1.0, (fsqrt vector))
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@wangleiat
wangleiat authored Dec 8, 2023
1 parent 6c87a0a commit 9f70e70
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2 changes: 2 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -269,6 +269,7 @@ LoongArchTargetLowering::LoongArchTargetLowering(const TargetMachine &TM,
setOperationAction({ISD::FADD, ISD::FSUB}, VT, Legal);
setOperationAction({ISD::FMUL, ISD::FDIV}, VT, Legal);
setOperationAction(ISD::FMA, VT, Legal);
setOperationAction(ISD::FSQRT, VT, Legal);
setCondCodeAction({ISD::SETGE, ISD::SETGT, ISD::SETOGE, ISD::SETOGT,
ISD::SETUGE, ISD::SETUGT},
VT, Expand);
Expand Down Expand Up @@ -309,6 +310,7 @@ LoongArchTargetLowering::LoongArchTargetLowering(const TargetMachine &TM,
setOperationAction({ISD::FADD, ISD::FSUB}, VT, Legal);
setOperationAction({ISD::FMUL, ISD::FDIV}, VT, Legal);
setOperationAction(ISD::FMA, VT, Legal);
setOperationAction(ISD::FSQRT, VT, Legal);
setCondCodeAction({ISD::SETGE, ISD::SETGT, ISD::SETOGE, ISD::SETOGT,
ISD::SETUGE, ISD::SETUGT},
VT, Expand);
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22 changes: 22 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchLASXInstrInfo.td
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Expand Up @@ -1092,6 +1092,13 @@ multiclass PatXr<SDPatternOperator OpNode, string Inst> {
(!cast<LAInst>(Inst#"_D") LASX256:$xj)>;
}

multiclass PatXrF<SDPatternOperator OpNode, string Inst> {
def : Pat<(v8f32 (OpNode (v8f32 LASX256:$xj))),
(!cast<LAInst>(Inst#"_S") LASX256:$xj)>;
def : Pat<(v4f64 (OpNode (v4f64 LASX256:$xj))),
(!cast<LAInst>(Inst#"_D") LASX256:$xj)>;
}

multiclass PatXrXr<SDPatternOperator OpNode, string Inst> {
def : Pat<(OpNode (v32i8 LASX256:$xj), (v32i8 LASX256:$xk)),
(!cast<LAInst>(Inst#"_B") LASX256:$xj, LASX256:$xk)>;
Expand Down Expand Up @@ -1448,6 +1455,21 @@ def : Pat<(fma v8f32:$xj, v8f32:$xk, v8f32:$xa),
def : Pat<(fma v4f64:$xj, v4f64:$xk, v4f64:$xa),
(XVFMADD_D v4f64:$xj, v4f64:$xk, v4f64:$xa)>;

// XVFSQRT_{S/D}
defm : PatXrF<fsqrt, "XVFSQRT">;

// XVRECIP_{S/D}
def : Pat<(fdiv vsplatf32_fpimm_eq_1, v8f32:$xj),
(XVFRECIP_S v8f32:$xj)>;
def : Pat<(fdiv vsplatf64_fpimm_eq_1, v4f64:$xj),
(XVFRECIP_D v4f64:$xj)>;

// XVFRSQRT_{S/D}
def : Pat<(fdiv vsplatf32_fpimm_eq_1, (fsqrt v8f32:$xj)),
(XVFRSQRT_S v8f32:$xj)>;
def : Pat<(fdiv vsplatf64_fpimm_eq_1, (fsqrt v4f64:$xj)),
(XVFRSQRT_D v4f64:$xj)>;

// XVSEQ[I]_{B/H/W/D}
defm : PatCCXrSimm5<SETEQ, "XVSEQI">;
defm : PatCCXrXr<SETEQ, "XVSEQ">;
Expand Down
45 changes: 45 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchLSXInstrInfo.td
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Expand Up @@ -95,6 +95,29 @@ def vsplati64_imm_eq_63 : PatFrags<(ops), [(build_vector),
Imm.getBitWidth() == EltTy.getSizeInBits() && Imm == 63;
}]>;

def vsplatf32_fpimm_eq_1
: PatFrags<(ops), [(bitconvert (v4i32 (build_vector))),
(bitconvert (v8i32 (build_vector)))], [{
APInt Imm;
EVT EltTy = N->getValueType(0).getVectorElementType();
N = N->getOperand(0).getNode();

return selectVSplat(N, Imm, EltTy.getSizeInBits()) &&
Imm.getBitWidth() == EltTy.getSizeInBits() &&
Imm == APFloat(+1.0f).bitcastToAPInt();
}]>;
def vsplatf64_fpimm_eq_1
: PatFrags<(ops), [(bitconvert (v2i64 (build_vector))),
(bitconvert (v4i64 (build_vector)))], [{
APInt Imm;
EVT EltTy = N->getValueType(0).getVectorElementType();
N = N->getOperand(0).getNode();

return selectVSplat(N, Imm, EltTy.getSizeInBits()) &&
Imm.getBitWidth() == EltTy.getSizeInBits() &&
Imm == APFloat(+1.0).bitcastToAPInt();
}]>;

def vsplati8imm7 : PatFrag<(ops node:$reg),
(and node:$reg, vsplati8_imm_eq_7)>;
def vsplati16imm15 : PatFrag<(ops node:$reg),
Expand Down Expand Up @@ -1173,6 +1196,13 @@ multiclass PatVr<SDPatternOperator OpNode, string Inst> {
(!cast<LAInst>(Inst#"_D") LSX128:$vj)>;
}

multiclass PatVrF<SDPatternOperator OpNode, string Inst> {
def : Pat<(v4f32 (OpNode (v4f32 LSX128:$vj))),
(!cast<LAInst>(Inst#"_S") LSX128:$vj)>;
def : Pat<(v2f64 (OpNode (v2f64 LSX128:$vj))),
(!cast<LAInst>(Inst#"_D") LSX128:$vj)>;
}

multiclass PatVrVr<SDPatternOperator OpNode, string Inst> {
def : Pat<(OpNode (v16i8 LSX128:$vj), (v16i8 LSX128:$vk)),
(!cast<LAInst>(Inst#"_B") LSX128:$vj, LSX128:$vk)>;
Expand Down Expand Up @@ -1525,6 +1555,21 @@ def : Pat<(fma v4f32:$vj, v4f32:$vk, v4f32:$va),
def : Pat<(fma v2f64:$vj, v2f64:$vk, v2f64:$va),
(VFMADD_D v2f64:$vj, v2f64:$vk, v2f64:$va)>;

// VFSQRT_{S/D}
defm : PatVrF<fsqrt, "VFSQRT">;

// VFRECIP_{S/D}
def : Pat<(fdiv vsplatf32_fpimm_eq_1, v4f32:$vj),
(VFRECIP_S v4f32:$vj)>;
def : Pat<(fdiv vsplatf64_fpimm_eq_1, v2f64:$vj),
(VFRECIP_D v2f64:$vj)>;

// VFRSQRT_{S/D}
def : Pat<(fdiv vsplatf32_fpimm_eq_1, (fsqrt v4f32:$vj)),
(VFRSQRT_S v4f32:$vj)>;
def : Pat<(fdiv vsplatf64_fpimm_eq_1, (fsqrt v2f64:$vj)),
(VFRSQRT_D v2f64:$vj)>;

// VSEQ[I]_{B/H/W/D}
defm : PatCCVrSimm5<SETEQ, "VSEQI">;
defm : PatCCVrVr<SETEQ, "VSEQ">;
Expand Down
65 changes: 65 additions & 0 deletions llvm/test/CodeGen/LoongArch/lasx/fsqrt.ll
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@@ -0,0 +1,65 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc --mtriple=loongarch64 --mattr=+lasx < %s | FileCheck %s

;; fsqrt
define void @sqrt_v8f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: sqrt_v8f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfsqrt.s $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <8 x float>, ptr %a0, align 16
%sqrt = call <8 x float> @llvm.sqrt.v8f32 (<8 x float> %v0)
store <8 x float> %sqrt, ptr %res, align 16
ret void
}

define void @sqrt_v4f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: sqrt_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfsqrt.d $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x double>, ptr %a0, align 16
%sqrt = call <4 x double> @llvm.sqrt.v4f64 (<4 x double> %v0)
store <4 x double> %sqrt, ptr %res, align 16
ret void
}

;; 1.0 / (fsqrt vec)
define void @one_div_sqrt_v8f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_div_sqrt_v8f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfrsqrt.s $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <8 x float>, ptr %a0, align 16
%sqrt = call <8 x float> @llvm.sqrt.v8f32 (<8 x float> %v0)
%div = fdiv <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
store <8 x float> %div, ptr %res, align 16
ret void
}

define void @one_div_sqrt_v4f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_div_sqrt_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfrsqrt.d $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x double>, ptr %a0, align 16
%sqrt = call <4 x double> @llvm.sqrt.v4f64 (<4 x double> %v0)
%div = fdiv <4 x double> <double 1.0, double 1.0, double 1.0, double 1.0>, %sqrt
store <4 x double> %div, ptr %res, align 16
ret void
}

declare <8 x float> @llvm.sqrt.v8f32(<8 x float>)
declare <4 x double> @llvm.sqrt.v4f64(<4 x double>)
29 changes: 29 additions & 0 deletions llvm/test/CodeGen/LoongArch/lasx/ir-instruction/fdiv.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -32,3 +32,32 @@ entry:
store <4 x double> %v2, ptr %res
ret void
}

;; 1.0 / vec
define void @one_fdiv_v8f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_fdiv_v8f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfrecip.s $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <8 x float>, ptr %a0
%div = fdiv <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %v0
store <8 x float> %div, ptr %res
ret void
}

define void @one_fdiv_v4f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_fdiv_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvld $xr0, $a1, 0
; CHECK-NEXT: xvfrecip.d $xr0, $xr0
; CHECK-NEXT: xvst $xr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x double>, ptr %a0
%div = fdiv <4 x double> <double 1.0, double 1.0, double 1.0, double 1.0>, %v0
store <4 x double> %div, ptr %res
ret void
}
65 changes: 65 additions & 0 deletions llvm/test/CodeGen/LoongArch/lsx/fsqrt.ll
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Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc --mtriple=loongarch64 --mattr=+lsx < %s | FileCheck %s

;; fsqrt
define void @sqrt_v4f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: sqrt_v4f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfsqrt.s $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x float>, ptr %a0, align 16
%sqrt = call <4 x float> @llvm.sqrt.v4f32 (<4 x float> %v0)
store <4 x float> %sqrt, ptr %res, align 16
ret void
}

define void @sqrt_v2f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: sqrt_v2f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfsqrt.d $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <2 x double>, ptr %a0, align 16
%sqrt = call <2 x double> @llvm.sqrt.v2f64 (<2 x double> %v0)
store <2 x double> %sqrt, ptr %res, align 16
ret void
}

;; 1.0 / (fsqrt vec)
define void @one_div_sqrt_v4f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_div_sqrt_v4f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfrsqrt.s $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x float>, ptr %a0, align 16
%sqrt = call <4 x float> @llvm.sqrt.v4f32 (<4 x float> %v0)
%div = fdiv <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
store <4 x float> %div, ptr %res, align 16
ret void
}

define void @one_div_sqrt_v2f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_div_sqrt_v2f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfrsqrt.d $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <2 x double>, ptr %a0, align 16
%sqrt = call <2 x double> @llvm.sqrt.v2f64 (<2 x double> %v0)
%div = fdiv <2 x double> <double 1.0, double 1.0>, %sqrt
store <2 x double> %div, ptr %res, align 16
ret void
}

declare <4 x float> @llvm.sqrt.v4f32(<4 x float>)
declare <2 x double> @llvm.sqrt.v2f64(<2 x double>)
29 changes: 29 additions & 0 deletions llvm/test/CodeGen/LoongArch/lsx/ir-instruction/fdiv.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -32,3 +32,32 @@ entry:
store <2 x double> %v2, ptr %res
ret void
}

;; 1.0 / vec
define void @one_fdiv_v4f32(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_fdiv_v4f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfrecip.s $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <4 x float>, ptr %a0
%div = fdiv <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %v0
store <4 x float> %div, ptr %res
ret void
}

define void @one_fdiv_v2f64(ptr %res, ptr %a0) nounwind {
; CHECK-LABEL: one_fdiv_v2f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vld $vr0, $a1, 0
; CHECK-NEXT: vfrecip.d $vr0, $vr0
; CHECK-NEXT: vst $vr0, $a0, 0
; CHECK-NEXT: ret
entry:
%v0 = load <2 x double>, ptr %a0
%div = fdiv <2 x double> <double 1.0, double 1.0>, %v0
store <2 x double> %div, ptr %res
ret void
}

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