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63be72069d
If 2.5 ulp is acceptable, denormals are not required, and isn't a reciprocal which will already be handled, replace with a faster fdiv. Simplify the lowering tests by using per function subtarget features. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276051 91177308-0d34-0410-b5e6-96231b3b80d8
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
//===- AMDGPUIntrinsicInfo.cpp - AMDGPU Intrinsic Information ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//==-----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief AMDGPU Implementation of the IntrinsicInfo class.
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//
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//===-----------------------------------------------------------------------===//
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#include "AMDGPUIntrinsicInfo.h"
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#include "AMDGPUSubtarget.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Intrinsics.h"
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#include "llvm/IR/Module.h"
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using namespace llvm;
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AMDGPUIntrinsicInfo::AMDGPUIntrinsicInfo()
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: TargetIntrinsicInfo() {}
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static const char *const IntrinsicNameTable[] = {
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#define GET_INTRINSIC_NAME_TABLE
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#include "AMDGPUGenIntrinsics.inc"
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#undef GET_INTRINSIC_NAME_TABLE
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};
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namespace {
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#define GET_INTRINSIC_ATTRIBUTES
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#include "AMDGPUGenIntrinsics.inc"
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#undef GET_INTRINSIC_ATTRIBUTES
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}
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StringRef AMDGPUIntrinsicInfo::getName(unsigned IntrID,
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ArrayRef<Type *> Tys) const {
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if (IntrID < Intrinsic::num_intrinsics)
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return StringRef();
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assert(IntrID < AMDGPUIntrinsic::num_AMDGPU_intrinsics &&
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"Invalid intrinsic ID");
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return IntrinsicNameTable[IntrID - Intrinsic::num_intrinsics];
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}
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std::string AMDGPUIntrinsicInfo::getName(unsigned IntrID, Type **Tys,
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unsigned NumTys) const {
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return getName(IntrID, makeArrayRef(Tys, NumTys)).str();
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}
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FunctionType *AMDGPUIntrinsicInfo::getType(LLVMContext &Context, unsigned ID,
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ArrayRef<Type*> Tys) const {
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// FIXME: Re-use Intrinsic::getType machinery
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switch (ID) {
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case AMDGPUIntrinsic::amdgcn_fdiv_fast: {
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Type *F32Ty = Type::getFloatTy(Context);
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return FunctionType::get(F32Ty, { F32Ty, F32Ty }, false);
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}
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default:
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llvm_unreachable("unhandled intrinsic");
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}
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}
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unsigned AMDGPUIntrinsicInfo::lookupName(const char *NameData,
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unsigned Len) const {
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StringRef Name(NameData, Len);
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if (!Name.startswith("llvm."))
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return 0; // All intrinsics start with 'llvm.'
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// Look for a name match in our table. If the intrinsic is not overloaded,
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// require an exact match. If it is overloaded, require a prefix match. The
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// AMDGPU enum enum starts at Intrinsic::num_intrinsics.
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int Idx = Intrinsic::lookupLLVMIntrinsicByName(IntrinsicNameTable, Name);
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if (Idx >= 0) {
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bool IsPrefixMatch = Name.size() > strlen(IntrinsicNameTable[Idx]);
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return IsPrefixMatch == isOverloaded(Idx + 1)
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? Intrinsic::num_intrinsics + Idx
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: 0;
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}
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return 0;
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}
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bool AMDGPUIntrinsicInfo::isOverloaded(unsigned id) const {
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// Overload Table
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#define GET_INTRINSIC_OVERLOAD_TABLE
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#include "AMDGPUGenIntrinsics.inc"
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#undef GET_INTRINSIC_OVERLOAD_TABLE
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}
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Function *AMDGPUIntrinsicInfo::getDeclaration(Module *M, unsigned IntrID,
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ArrayRef<Type *> Tys) const {
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FunctionType *FTy = getType(M->getContext(), IntrID, Tys);
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Function *F
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= cast<Function>(M->getOrInsertFunction(getName(IntrID, Tys), FTy));
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AttributeSet AS = getAttributes(M->getContext(),
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static_cast<AMDGPUIntrinsic::ID>(IntrID));
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F->setAttributes(AS);
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return F;
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}
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Function *AMDGPUIntrinsicInfo::getDeclaration(Module *M, unsigned IntrID,
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Type **Tys,
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unsigned NumTys) const {
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return getDeclaration(M, IntrID, makeArrayRef(Tys, NumTys));
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}
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