[SPIRV] Frexp intrinsic implementation (#157436)
- Make use of the OpenCL extended instruction frexp. - Creates a variable and passes it to OpExtInst instruction
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Ebin-McW
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@ -314,7 +314,8 @@ private:
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MachineInstr &I) const;
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bool selectModf(Register ResVReg, const SPIRVType *ResType,
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MachineInstr &I) const;
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bool selectFrexp(Register ResVReg, const SPIRVType *ResType,
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MachineInstr &I) const;
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// Utilities
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std::pair<Register, bool>
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buildI32Constant(uint32_t Val, MachineInstr &I,
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@ -835,6 +836,9 @@ bool SPIRVInstructionSelector::spvSelect(Register ResVReg,
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case TargetOpcode::G_USUBSAT:
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return selectExtInst(ResVReg, ResType, I, CL::u_sub_sat);
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case TargetOpcode::G_FFREXP:
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return selectFrexp(ResVReg, ResType, I);
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case TargetOpcode::G_UADDO:
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return selectOverflowArith(ResVReg, ResType, I,
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ResType->getOpcode() == SPIRV::OpTypeVector
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@ -1119,6 +1123,53 @@ bool SPIRVInstructionSelector::selectExtInstForLRound(
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return false;
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}
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bool SPIRVInstructionSelector::selectFrexp(Register ResVReg,
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const SPIRVType *ResType,
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MachineInstr &I) const {
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ExtInstList ExtInsts = {{SPIRV::InstructionSet::OpenCL_std, CL::frexp},
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{SPIRV::InstructionSet::GLSL_std_450, GL::Frexp}};
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for (const auto &Ex : ExtInsts) {
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SPIRV::InstructionSet::InstructionSet Set = Ex.first;
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uint32_t Opcode = Ex.second;
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if (!STI.canUseExtInstSet(Set))
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continue;
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MachineIRBuilder MIRBuilder(I);
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SPIRVType *PointeeTy = GR.getSPIRVTypeForVReg(I.getOperand(1).getReg());
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const SPIRVType *PointerType = GR.getOrCreateSPIRVPointerType(
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PointeeTy, MIRBuilder, SPIRV::StorageClass::Function);
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Register PointerVReg =
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createVirtualRegister(PointerType, &GR, MRI, MRI->getMF());
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auto It = getOpVariableMBBIt(I);
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auto MIB = BuildMI(*It->getParent(), It, It->getDebugLoc(),
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TII.get(SPIRV::OpVariable))
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.addDef(PointerVReg)
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.addUse(GR.getSPIRVTypeID(PointerType))
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.addImm(static_cast<uint32_t>(SPIRV::StorageClass::Function))
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.constrainAllUses(TII, TRI, RBI);
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MIB = MIB &
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BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpExtInst))
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.addDef(ResVReg)
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.addUse(GR.getSPIRVTypeID(ResType))
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.addImm(static_cast<uint32_t>(Ex.first))
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.addImm(Opcode)
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.add(I.getOperand(2))
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.addUse(PointerVReg)
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.constrainAllUses(TII, TRI, RBI);
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MIB = MIB &
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BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(SPIRV::OpLoad))
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.addDef(I.getOperand(1).getReg())
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.addUse(GR.getSPIRVTypeID(PointeeTy))
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.addUse(PointerVReg)
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.constrainAllUses(TII, TRI, RBI);
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return MIB;
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}
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return false;
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}
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bool SPIRVInstructionSelector::selectOpWithSrcs(Register ResVReg,
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const SPIRVType *ResType,
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MachineInstr &I,
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@ -290,6 +290,9 @@ SPIRVLegalizerInfo::SPIRVLegalizerInfo(const SPIRVSubtarget &ST) {
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// Control-flow. In some cases (e.g. constants) s1 may be promoted to s32.
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getActionDefinitionsBuilder(G_BRCOND).legalFor({s1, s32});
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getActionDefinitionsBuilder(G_FFREXP).legalForCartesianProduct(
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allFloatScalarsAndVectors, {s32, v2s32, v3s32, v4s32, v8s32, v16s32});
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// TODO: Review the target OpenCL and GLSL Extended Instruction Set specs to
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// tighten these requirements. Many of these math functions are only legal on
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// specific bitwidths, so they are not selectable for
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114
llvm/test/CodeGen/SPIRV/llvm-intrinsics/frexp.ll
Normal file
114
llvm/test/CodeGen/SPIRV/llvm-intrinsics/frexp.ll
Normal file
@ -0,0 +1,114 @@
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; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
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; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown %s -o - -filetype=obj | spirv-val %}
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; CHECK-DAG: %[[#extinst_id:]] = OpExtInstImport "OpenCL.std"
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; CHECK-DAG: %[[#float_32_type:]] = OpTypeFloat 32
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; CHECK-DAG: %[[#int_32_type:]] = OpTypeInt 32 0
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; CHECK-DAG: %[[#fn_ptr_type_i32:]] = OpTypePointer Function %[[#int_32_type]]
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; CHECK-DAG: %[[#const_negzero:]] = OpConstant %[[#float_32_type]] -0
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; CHECK-DAG: %[[#vec2_float_type:]] = OpTypeVector %[[#float_32_type]] 2
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; CHECK-DAG: %[[#vec2_int_type:]] = OpTypeVector %[[#int_32_type]] 2
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; CHECK-DAG: %[[#fn_ptr_type_vec2_i32:]] = OpTypePointer Function %[[#vec2_int_type]]
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; CHECK-DAG: %[[#vec2_null:]] = OpConstantNull %[[#vec2_float_type]]
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; CHECK-DAG: %[[#scalar_null:]] = OpConstantNull %[[#float_32_type]]
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; CHECK-DAG: %[[#const_composite1:]] = OpConstantComposite %[[#vec2_float_type]] %[[#scalar_null]] %[[#const_negzero]]
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; CHECK-DAG: %[[#vec4_float_type:]] = OpTypeVector %[[#float_32_type]] 4
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; CHECK-DAG: %[[#vec4_int_type:]] = OpTypeVector %[[#int_32_type]] 4
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; CHECK-DAG: %[[#fn_ptr_type_vec4_i32:]] = OpTypePointer Function %[[#vec4_int_type]]
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; CHECK-DAG: %[[#const_composite2:]] = OpConstantComposite %[[#vec4_float_type]] %[[#const_16:]] %[[#const_neg32:]] %[[#const_0:]] %[[#const_9999:]]
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; CHECK-DAG: %[[#float_64_type:]] = OpTypeFloat 64
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; CHECK-DAG: %[[#vec2_double_type:]] = OpTypeVector %[[#float_64_type]] 2
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; CHECK: %[[#]] = OpFunctionParameter %[[#float_32_type]]
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; CHECK: %[[#var1:]] = OpVariable %[[#fn_ptr_type_i32]] Function
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; CHECK: %[[#extinst1:]] = OpExtInst %[[#float_32_type]] %[[#extinst_id]] frexp %[[#const_negzero]] %[[#var1]]
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; CHECK: %[[#exp_part_var:]] = OpLoad %[[#int_32_type]] %[[#var1]]
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; CHECK: OpReturnValue %[[#exp_part_var]]
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define i32 @frexp_negzero(float %x) {
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%ret = call { float, i32 } @llvm.frexp.f32.i32(float -0.0)
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%f_part = extractvalue { float, i32 } %ret, 0
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%exp_part = extractvalue { float, i32 } %ret, 1
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ret i32 %exp_part
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}
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; CHECK: %[[#x_var4:]] = OpFunctionParameter %[[#float_32_type]]
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; CHECK: %[[#var10:]] = OpVariable %[[#fn_ptr_type_i32]] Function
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; CHECK: %[[#extinst10:]] = OpExtInst %[[#float_32_type]] %[[#extinst_id]] frexp %[[#x_var4]] %[[#var10]]
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; CHECK: %[[#exp_part_var2:]] = OpLoad %[[#int_32_type]] %[[#var10]]
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; CHECK: OpReturnValue %[[#exp_part_var2]]
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define i32 @frexp_frexp_get_int(float %x) {
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%frexp0 = call { float, i32 } @llvm.frexp.f32.i32(float %x)
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%f_part = extractvalue { float, i32 } %frexp0, 0
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%exp_part = extractvalue { float, i32 } %frexp0, 1
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ret i32 %exp_part
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}
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; CHECK: %[[#var3:]] = OpVariable %[[#fn_ptr_type_vec2_i32]] Function
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; CHECK: %[[#extinst3:]] = OpExtInst %[[#vec2_float_type]] %[[#extinst_id]] frexp %[[#vec2_null]] %[[#var3]]
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; CHECK: %[[#f_part_var2:]] = OpLoad %[[#vec2_int_type]] %[[#var3]]
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; CHECK: OpReturnValue %[[#extinst3]]
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define <2 x float> @frexp_zero_vector() {
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%ret = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> zeroinitializer)
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%f_part = extractvalue { <2 x float>, <2 x i32> } %ret, 0
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%exp_part = extractvalue { <2 x float>, <2 x i32> } %ret, 1
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ret <2 x float> %f_part
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}
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; CHECK: %[[#var4:]] = OpVariable %[[#fn_ptr_type_vec2_i32]] Function
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; CHECK: %[[#extinst4:]] = OpExtInst %[[#vec2_float_type]] %[[#extinst_id]] frexp %[[#const_composite1]] %[[#var4]]
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; CHECK: %[[#f_part_var3:]] = OpLoad %[[#vec2_int_type]] %[[#var4]]
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; CHECK: OpReturnValue %[[#extinst4]]
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define <2 x float> @frexp_zero_negzero_vector() {
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%ret = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> <float 0.0, float -0.0>)
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%f_part = extractvalue { <2 x float>, <2 x i32> } %ret, 0
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%exp_part = extractvalue { <2 x float>, <2 x i32> } %ret, 1
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ret <2 x float> %f_part
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}
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; CHECK: %[[#var5:]] = OpVariable %[[#fn_ptr_type_vec4_i32]] Function
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; CHECK: %[[#extinst5:]] = OpExtInst %[[#vec4_float_type]] %[[#extinst_id]] frexp %[[#const_composite2]] %[[#var5]]
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; CHECK: %[[#f_part_var4:]] = OpLoad %[[#vec4_int_type]] %[[#var5]]
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; CHECK: OpReturnValue %[[#extinst5]]
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define <4 x float> @frexp_nonsplat_vector() {
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%ret = call { <4 x float>, <4 x i32> } @llvm.frexp.v4f32.v4i32(<4 x float> <float 16.0, float -32.0, float 0.0, float 9999.0>)
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%f_part = extractvalue { <4 x float>, <4 x i32> } %ret, 0
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%exp_part = extractvalue { <4 x float>, <4 x i32> } %ret, 1
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ret <4 x float> %f_part
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}
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; CHECK: %[[#x_var2:]] = OpFunctionParameter %[[#float_32_type]]
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; CHECK: %[[#var6:]] = OpVariable %[[#fn_ptr_type_i32]] Function
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; CHECK: %[[#var7:]] = OpVariable %[[#fn_ptr_type_i32]] Function
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; CHECK: %[[#extinst6:]] = OpExtInst %[[#float_32_type]] %[[#extinst_id]] frexp %[[#x_var2]] %[[#var6]]
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; CHECK: %[[#load1:]] = OpLoad %[[#int_32_type]] %[[#var6]]
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; CHECK: %[[#extinst7:]] = OpExtInst %[[#float_32_type]] %[[#extinst_id]] frexp %[[#extinst6]] %[[#var7]]
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; CHECK: %[[#f_part_var5:]] = OpLoad %[[#int_32_type]] %[[#var7]]
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; CHECK: OpReturnValue %[[#extinst7]]
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define float @frexp_frexp(float %x) {
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%frexp0 = call { float, i32 } @llvm.frexp.f32.i32(float %x)
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%frexp0_f_part = extractvalue { float, i32 } %frexp0, 0
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%frexp0_exp_part = extractvalue { float, i32 } %frexp0, 1
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%frexp1 = call { float, i32 } @llvm.frexp.f32.i32(float %frexp0_f_part)
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%frexp1_f_part = extractvalue { float, i32 } %frexp1, 0
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%frexp1_exp_part = extractvalue { float, i32 } %frexp1, 1
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ret float %frexp1_f_part
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}
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; CHECK: %[[#x_var3:]] = OpFunctionParameter %[[#vec2_double_type]]
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; CHECK: %[[#var9:]] = OpVariable %[[#fn_ptr_type_vec2_i32]] Function
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; CHECK: %[[#extinst9:]] = OpExtInst %[[#vec2_double_type]] %[[#extinst_id]] frexp %[[#x_var3]] %[[#var9]]
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; CHECK: %[[#f_part_var6:]] = OpLoad %[[#vec2_int_type]] %[[#var9]]
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; CHECK: OpReturnValue %[[#extinst9]]
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define <2 x double> @frexp_frexp_vector(<2 x double> %x) {
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%frexp0 = call { <2 x double>, <2 x i32> } @llvm.frexp.v2f64.v2i32(<2 x double> %x)
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%f_part = extractvalue { <2 x double>, <2 x i32> } %frexp0, 0
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%exp_part = extractvalue { <2 x double>, <2 x i32> } %frexp0, 1
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ret <2 x double> %f_part
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}
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declare { float, i32 } @llvm.frexp.f32.i32(float)
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declare { double, i32 } @llvm.frexp.f64.i32(double)
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declare { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float>)
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declare { <4 x float>, <4 x i32> } @llvm.frexp.v4f32.v4i32(<4 x float>)
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declare { <2 x double>, <2 x i32> } @llvm.frexp.v2f64.v2i32(<2 x double>)
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declare { float, i8 } @llvm.frexp.f32.i8(float)
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