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[SPIRV] support for the intrinsic @llvm.fptosi.sat.* and @llvm.fptoui.sat.* #129222

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[SPIRV] support for the intrinsic @llvm.fptosi.sat.* and @llvm.fptoui.sat.* #129222

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78b6638
FEAT:
VishMCW Mar 6, 2025
d6310dd
minor formatting change
VishMCW Apr 29, 2025
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19 changes: 19 additions & 0 deletions llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1367,6 +1367,24 @@ static void createSaturatedConversionDecoration(Instruction *I,
createDecorationIntrinsic(I, SaturatedConversionNode, B);
}

static void addSaturatedDecorationToIntrinsic(Instruction *I, IRBuilder<> &B) {
if (auto *CI = dyn_cast<CallInst>(I)) {
if (Function *Fu = CI->getCalledFunction()) {
if (Fu->isIntrinsic()) {
unsigned const int IntrinsicId = Fu->getIntrinsicID();
switch (IntrinsicId) {
case Intrinsic::fptosi_sat:
case Intrinsic::fptoui_sat:
createSaturatedConversionDecoration(I, B);
break;
default:
break;
}
}
}
}
}

Instruction *SPIRVEmitIntrinsics::visitCallInst(CallInst &Call) {
if (!Call.isInlineAsm())
return &Call;
Expand Down Expand Up @@ -2442,6 +2460,7 @@ bool SPIRVEmitIntrinsics::runOnFunction(Function &Func) {
if (isConvergenceIntrinsic(I))
continue;

addSaturatedDecorationToIntrinsic(I, B);
processInstrAfterVisit(I, B);
}

Expand Down
5 changes: 5 additions & 0 deletions llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -601,6 +601,11 @@ bool SPIRVInstructionSelector::spvSelect(Register ResVReg,
case TargetOpcode::G_FPTOUI:
return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertFToU);

case TargetOpcode::G_FPTOSI_SAT:
return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertFToS);
case TargetOpcode::G_FPTOUI_SAT:
return selectUnOp(ResVReg, ResType, I, SPIRV::OpConvertFToU);

case TargetOpcode::G_SITOFP:
return selectIToF(ResVReg, ResType, I, true, SPIRV::OpConvertSToF);
case TargetOpcode::G_UITOFP:
Expand Down
4 changes: 4 additions & 0 deletions llvm/lib/Target/SPIRV/SPIRVLegalizerInfo.cpp
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Expand Up @@ -236,6 +236,10 @@ SPIRVLegalizerInfo::SPIRVLegalizerInfo(const SPIRVSubtarget &ST) {
.legalForCartesianProduct(allIntScalarsAndVectors,
allFloatScalarsAndVectors);

getActionDefinitionsBuilder({G_FPTOSI_SAT, G_FPTOUI_SAT})
.legalForCartesianProduct(allIntScalarsAndVectors,
allFloatScalarsAndVectors);

getActionDefinitionsBuilder({G_SITOFP, G_UITOFP})
.legalForCartesianProduct(allFloatScalarsAndVectors,
allScalarsAndVectors);
Expand Down
195 changes: 195 additions & 0 deletions llvm/test/CodeGen/SPIRV/llvm-intrinsics/fp-to-int-intrinsics.ll
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@@ -0,0 +1,195 @@
; RUN: llc -O0 -verify-machineinstrs -mtriple=spirv64-unkown-unknown %s -o - | FileCheck %s
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unkown-unknown %s -o - -filetype=obj | spirv-val %}

; CHECK: OpDecorate %[[#SAT1:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT2:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT3:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT4:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT5:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT6:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT7:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT8:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT9:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT10:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT11:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT12:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT13:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT14:]] SaturatedConversion
; CHECK: OpDecorate %[[#SAT15:]] SaturatedConversion


; CHECK: %[[#SAT1:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_signed_i8(float %input) {
entry:
%ptr = alloca i8
%signed_int = call i8 @llvm.fptosi.sat.i8.f32(float %input)
store i8 %signed_int, i8* %ptr
ret void

}
declare i8 @llvm.fptosi.sat.i8.f32(float)


; CHECK: %[[#SAT2:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_signed_i16(float %input) {
entry:
%ptr = alloca i16
%signed_int = call i16 @llvm.fptosi.sat.i16.f32(float %input)
store i16 %signed_int, i16* %ptr
ret void

}
declare i16 @llvm.fptosi.sat.i16.f32(float)

; CHECK: %[[#SAT3:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_signed_i32(float %input) {
entry:
%ptr = alloca i32
%signed_int = call i32 @llvm.fptosi.sat.i32.f32(float %input)
store i32 %signed_int, i32* %ptr
ret void

}
declare i32 @llvm.fptosi.sat.i32.f32(float)


; CHECK: %[[#SAT4:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_signed_i64(float %input) {
entry:
%ptr = alloca i64
%signed_int = call i64 @llvm.fptosi.sat.i64.f32(float %input)
store i64 %signed_int, i64* %ptr
ret void
}
declare i64 @llvm.fptosi.sat.i64.f32(float)


; CHECK: %[[#SAT5:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_signed_i8(double %input) {
entry:
%ptr = alloca i8
%signed_int = call i8 @llvm.fptosi.sat.i8.f64(double %input)
store i8 %signed_int, i8* %ptr
ret void
}
declare i8 @llvm.fptosi.sat.i8.f64(double)


; CHECK: %[[#SAT6:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_signed_i16(double %input) {
entry:
%ptr = alloca i16
%signed_int = call i16 @llvm.fptosi.sat.i16.f64(double %input)
store i16 %signed_int, i16* %ptr
ret void
}
declare i16 @llvm.fptosi.sat.i16.f64(double)


; CHECK: %[[#SAT7:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_signed_i32(double %input) {
entry:
%ptr = alloca i32
%signed_int = call i32 @llvm.fptosi.sat.i32.f64(double %input)
store i32 %signed_int, i32* %ptr
ret void
}
declare i32 @llvm.fptosi.sat.i32.f64(double)


; CHECK: %[[#SAT8:]] = OpConvertFToS %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_signed_i64(double %input) {
entry:
%ptr = alloca i64
%signed_int = call i64 @llvm.fptosi.sat.i64.f64(double %input)
store i64 %signed_int, i64* %ptr
ret void
}
declare i64 @llvm.fptosi.sat.i64.f64(double)

; CHECK: %[[#SAT8:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_unsigned_i8(float %input) {
entry:
%ptr = alloca i8
%unsigned_int = call i8 @llvm.fptoui.sat.i8.f32(float %input)
store i8 %unsigned_int, i8* %ptr
ret void
}
declare i8 @llvm.fptoui.sat.i8.f32(float)


; CHECK: %[[#SAT9:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_unsigned_i16(float %input) {
entry:
%ptr = alloca i16
%unsigned_int = call i16 @llvm.fptoui.sat.i16.f32(float %input)
store i16 %unsigned_int, i16* %ptr
ret void
}
declare i16 @llvm.fptoui.sat.i16.f32(float)


; CHECK: %[[#SAT10:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_unsigned_i32(float %input) {
entry:
%ptr = alloca i32
%unsigned_int = call i32 @llvm.fptoui.sat.i32.f32(float %input)
store i32 %unsigned_int, i32* %ptr
ret void
}
declare i32 @llvm.fptoui.sat.i32.f32(float)


; CHECK: %[[#SAT11:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_float_to_unsigned_i64(float %input) {
entry:
%ptr = alloca i64
%unsigned_int = call i64 @llvm.fptoui.sat.i64.f32(float %input)
store i64 %unsigned_int, i64* %ptr
ret void
}
declare i64 @llvm.fptoui.sat.i64.f32(float)


; CHECK: %[[#SAT12:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_unsigned_i8(double %input) {
entry:
%ptr = alloca i8
%unsigned_int = call i8 @llvm.fptoui.sat.i8.f64(double %input)
store i8 %unsigned_int, i8* %ptr
ret void
}
declare i8 @llvm.fptoui.sat.i8.f64(double)


; CHECK: %[[#SAT13:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_unsigned_i16(double %input) {
entry:
%ptr = alloca i16
%unsigned_int = call i16 @llvm.fptoui.sat.i16.f64(double %input)
store i16 %unsigned_int, i16* %ptr
ret void
}
declare i16 @llvm.fptoui.sat.i16.f64(double)


; CHECK: %[[#SAT14:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_unsigned_i32(double %input) {
entry:
%ptr = alloca i32
%unsigned_int = call i32 @llvm.fptoui.sat.i32.f64(double %input)
store i32 %unsigned_int, i32* %ptr
ret void
}
declare i32 @llvm.fptoui.sat.i32.f64(double)


; CHECK: %[[#SAT15:]] = OpConvertFToU %{{[0-9]+}} %[[#]]
define spir_kernel void @testfunction_double_to_unsigned_i64(double %input) {
entry:
%ptr = alloca i64
%unsigned_int = call i64 @llvm.fptoui.sat.i64.f64(double %input)
store i64 %unsigned_int, i64* %ptr
ret void
}
declare i64 @llvm.fptoui.sat.i64.f64(double)