478e0b5860
This update allows constant folding for many 128 bit floating point intrinsics through the library quadmath, which is only available on some platforms. Differential Revision: https://reviews.llvm.org/D156435
660 lines
27 KiB
C++
660 lines
27 KiB
C++
//===-- lib/Evaluate/intrinsics-library.cpp -------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// This file defines host runtime functions that can be used for folding
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// intrinsic functions.
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// The default host runtime folders are built with <cmath> and
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// <complex> functions that are guaranteed to exist from the C++ standard.
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#include "flang/Evaluate/intrinsics-library.h"
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#include "fold-implementation.h"
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#include "host.h"
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#include "flang/Common/static-multimap-view.h"
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#include "flang/Evaluate/expression.h"
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#include <cfloat>
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#include <cmath>
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#include <complex>
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#include <functional>
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#if HAS_QUADMATHLIB
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#include "quadmath.h"
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#include "flang/Common/float128.h"
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#endif
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#include <type_traits>
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namespace Fortran::evaluate {
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// Define a vector like class that can hold an arbitrary number of
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// Dynamic type and be built at compile time. This is like a
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// std::vector<DynamicType>, but constexpr only.
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template <typename... FortranType> struct TypeVectorStorage {
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static constexpr DynamicType values[]{FortranType{}.GetType()...};
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static constexpr const DynamicType *start{&values[0]};
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static constexpr const DynamicType *end{start + sizeof...(FortranType)};
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};
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template <> struct TypeVectorStorage<> {
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static constexpr const DynamicType *start{nullptr}, *end{nullptr};
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};
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struct TypeVector {
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template <typename... FortranType> static constexpr TypeVector Create() {
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using storage = TypeVectorStorage<FortranType...>;
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return TypeVector{storage::start, storage::end, sizeof...(FortranType)};
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}
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constexpr size_t size() const { return size_; };
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using const_iterator = const DynamicType *;
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constexpr const_iterator begin() const { return startPtr; }
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constexpr const_iterator end() const { return endPtr; }
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const DynamicType &operator[](size_t i) const { return *(startPtr + i); }
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const DynamicType *startPtr{nullptr};
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const DynamicType *endPtr{nullptr};
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const size_t size_;
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};
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inline bool operator==(
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const TypeVector &lhs, const std::vector<DynamicType> &rhs) {
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if (lhs.size() != rhs.size()) {
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return false;
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}
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for (size_t i{0}; i < lhs.size(); ++i) {
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if (lhs[i] != rhs[i]) {
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return false;
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}
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}
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return true;
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}
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// HostRuntimeFunction holds a pointer to a Folder function that can fold
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// a Fortran scalar intrinsic using host runtime functions (e.g libm).
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// The folder take care of all conversions between Fortran types and the related
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// host types as well as setting and cleaning-up the floating point environment.
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// HostRuntimeFunction are intended to be built at compile time (members are all
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// constexpr constructible) so that they can be stored in a compile time static
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// map.
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struct HostRuntimeFunction {
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using Folder = Expr<SomeType> (*)(
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FoldingContext &, std::vector<Expr<SomeType>> &&);
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using Key = std::string_view;
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// Needed for implicit compare with keys.
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constexpr operator Key() const { return key; }
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// Name of the related Fortran intrinsic.
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Key key;
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// DynamicType of the Expr<SomeType> returns by folder.
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DynamicType resultType;
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// DynamicTypes expected for the Expr<SomeType> arguments of the folder.
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// The folder will crash if provided arguments of different types.
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TypeVector argumentTypes;
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// Folder to be called to fold the intrinsic with host runtime. The provided
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// Expr<SomeType> arguments must wrap scalar constants of the type described
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// in argumentTypes, otherwise folder will crash. Any floating point issue
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// raised while executing the host runtime will be reported in FoldingContext
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// messages.
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Folder folder;
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};
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// Translate a host function type signature (template arguments) into a
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// constexpr data representation based on Fortran DynamicType that can be
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// stored.
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template <typename TR, typename... TA> using FuncPointer = TR (*)(TA...);
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template <typename T> struct FuncTypeAnalyzer {};
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template <typename HostTR, typename... HostTA>
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struct FuncTypeAnalyzer<FuncPointer<HostTR, HostTA...>> {
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static constexpr DynamicType result{host::FortranType<HostTR>{}.GetType()};
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static constexpr TypeVector arguments{
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TypeVector::Create<host::FortranType<HostTA>...>()};
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};
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// Define helpers to deal with host floating environment.
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template <typename TR>
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static void CheckFloatingPointIssues(
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host::HostFloatingPointEnvironment &hostFPE, const Scalar<TR> &x) {
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if constexpr (TR::category == TypeCategory::Complex ||
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TR::category == TypeCategory::Real) {
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if (x.IsNotANumber()) {
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hostFPE.SetFlag(RealFlag::InvalidArgument);
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} else if (x.IsInfinite()) {
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hostFPE.SetFlag(RealFlag::Overflow);
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}
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}
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}
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// Software Subnormal Flushing helper.
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// Only flush floating-points. Forward other scalars untouched.
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// Software flushing is only performed if hardware flushing is not available
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// because it may not result in the same behavior as hardware flushing.
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// Some runtime implementations are "working around" subnormal flushing to
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// return results that they deem better than returning the result they would
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// with a null argument. An example is logf that should return -inf if arguments
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// are flushed to zero, but some implementations return -1.03972076416015625e2_4
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// for all subnormal values instead. It is impossible to reproduce this with the
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// simple software flushing below.
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template <typename T>
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static constexpr inline const Scalar<T> FlushSubnormals(Scalar<T> &&x) {
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if constexpr (T::category == TypeCategory::Real ||
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T::category == TypeCategory::Complex) {
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return x.FlushSubnormalToZero();
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}
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return x;
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}
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// This is the kernel called by all HostRuntimeFunction folders, it convert the
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// Fortran Expr<SomeType> to the host runtime function argument types, calls
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// the runtime function, and wrap back the result into an Expr<SomeType>.
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// It deals with host floating point environment set-up and clean-up.
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template <typename FuncType, typename TR, typename... TA, size_t... I>
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static Expr<SomeType> ApplyHostFunctionHelper(FuncType func,
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FoldingContext &context, std::vector<Expr<SomeType>> &&args,
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std::index_sequence<I...>) {
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host::HostFloatingPointEnvironment hostFPE;
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hostFPE.SetUpHostFloatingPointEnvironment(context);
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host::HostType<TR> hostResult{};
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Scalar<TR> result{};
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std::tuple<Scalar<TA>...> scalarArgs{
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GetScalarConstantValue<TA>(args[I]).value()...};
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if (context.targetCharacteristics().areSubnormalsFlushedToZero() &&
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!hostFPE.hasSubnormalFlushingHardwareControl()) {
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hostResult = func(host::CastFortranToHost<TA>(
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FlushSubnormals<TA>(std::move(std::get<I>(scalarArgs))))...);
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result = FlushSubnormals<TR>(host::CastHostToFortran<TR>(hostResult));
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} else {
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hostResult = func(host::CastFortranToHost<TA>(std::get<I>(scalarArgs))...);
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result = host::CastHostToFortran<TR>(hostResult);
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}
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if (!hostFPE.hardwareFlagsAreReliable()) {
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CheckFloatingPointIssues<TR>(hostFPE, result);
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}
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hostFPE.CheckAndRestoreFloatingPointEnvironment(context);
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return AsGenericExpr(Constant<TR>(std::move(result)));
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}
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template <typename HostTR, typename... HostTA>
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Expr<SomeType> ApplyHostFunction(FuncPointer<HostTR, HostTA...> func,
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FoldingContext &context, std::vector<Expr<SomeType>> &&args) {
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return ApplyHostFunctionHelper<decltype(func), host::FortranType<HostTR>,
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host::FortranType<HostTA>...>(
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func, context, std::move(args), std::index_sequence_for<HostTA...>{});
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}
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// FolderFactory builds a HostRuntimeFunction for the host runtime function
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// passed as a template argument.
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// Its static member function "fold" is the resulting folder. It captures the
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// host runtime function pointer and pass it to the host runtime function folder
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// kernel.
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template <typename HostFuncType, HostFuncType func> class FolderFactory {
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public:
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static constexpr HostRuntimeFunction Create(const std::string_view &name) {
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return HostRuntimeFunction{name, FuncTypeAnalyzer<HostFuncType>::result,
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FuncTypeAnalyzer<HostFuncType>::arguments, &Fold};
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}
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private:
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static Expr<SomeType> Fold(
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FoldingContext &context, std::vector<Expr<SomeType>> &&args) {
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return ApplyHostFunction(func, context, std::move(args));
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}
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};
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// Define host runtime libraries that can be used for folding and
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// fill their description if they are available.
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enum class LibraryVersion {
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Libm,
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LibmExtensions,
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PgmathFast,
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PgmathRelaxed,
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PgmathPrecise
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};
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template <typename HostT, LibraryVersion> struct HostRuntimeLibrary {
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// When specialized, this class holds a static constexpr table containing
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// all the HostRuntimeLibrary for functions of library LibraryVersion
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// that returns a value of type HostT.
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};
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using HostRuntimeMap = common::StaticMultimapView<HostRuntimeFunction>;
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// Map numerical intrinsic to <cmath>/<complex> functions
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// (Note: ABS() is folded in fold-real.cpp.)
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template <typename HostT>
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struct HostRuntimeLibrary<HostT, LibraryVersion::Libm> {
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using F = FuncPointer<HostT, HostT>;
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using F2 = FuncPointer<HostT, HostT, HostT>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{std::acos}>::Create("acos"),
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FolderFactory<F, F{std::acosh}>::Create("acosh"),
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FolderFactory<F, F{std::asin}>::Create("asin"),
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FolderFactory<F, F{std::asinh}>::Create("asinh"),
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FolderFactory<F, F{std::atan}>::Create("atan"),
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FolderFactory<F2, F2{std::atan2}>::Create("atan2"),
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FolderFactory<F, F{std::atanh}>::Create("atanh"),
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FolderFactory<F, F{std::cos}>::Create("cos"),
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FolderFactory<F, F{std::cosh}>::Create("cosh"),
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FolderFactory<F, F{std::erf}>::Create("erf"),
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FolderFactory<F, F{std::erfc}>::Create("erfc"),
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FolderFactory<F, F{std::exp}>::Create("exp"),
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FolderFactory<F, F{std::tgamma}>::Create("gamma"),
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FolderFactory<F, F{std::log}>::Create("log"),
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FolderFactory<F, F{std::log10}>::Create("log10"),
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FolderFactory<F, F{std::lgamma}>::Create("log_gamma"),
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FolderFactory<F2, F2{std::pow}>::Create("pow"),
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FolderFactory<F, F{std::sin}>::Create("sin"),
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FolderFactory<F, F{std::sinh}>::Create("sinh"),
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FolderFactory<F, F{std::tan}>::Create("tan"),
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FolderFactory<F, F{std::tanh}>::Create("tanh"),
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};
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// Note: cmath does not have modulo and erfc_scaled equivalent
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// Note regarding lack of bessel function support:
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// C++17 defined standard Bessel math functions std::cyl_bessel_j
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// and std::cyl_neumann that can be used for Fortran j and y
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// bessel functions. However, they are not yet implemented in
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// clang libc++ (ok in GNU libstdc++). C maths functions j0...
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// are not C standard but a GNU extension so they are not used
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// to avoid introducing incompatibilities.
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// Use libpgmath to get bessel function folding support.
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// TODO: Add Bessel functions when possible.
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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template <typename HostT>
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struct HostRuntimeLibrary<std::complex<HostT>, LibraryVersion::Libm> {
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using F = FuncPointer<std::complex<HostT>, const std::complex<HostT> &>;
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using F2 = FuncPointer<std::complex<HostT>, const std::complex<HostT> &,
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const std::complex<HostT> &>;
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using F2A = FuncPointer<std::complex<HostT>, const HostT &,
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const std::complex<HostT> &>;
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using F2B = FuncPointer<std::complex<HostT>, const std::complex<HostT> &,
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const HostT &>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{std::acos}>::Create("acos"),
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FolderFactory<F, F{std::acosh}>::Create("acosh"),
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FolderFactory<F, F{std::asin}>::Create("asin"),
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FolderFactory<F, F{std::asinh}>::Create("asinh"),
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FolderFactory<F, F{std::atan}>::Create("atan"),
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FolderFactory<F, F{std::atanh}>::Create("atanh"),
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FolderFactory<F, F{std::cos}>::Create("cos"),
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FolderFactory<F, F{std::cosh}>::Create("cosh"),
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FolderFactory<F, F{std::exp}>::Create("exp"),
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FolderFactory<F, F{std::log}>::Create("log"),
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FolderFactory<F2, F2{std::pow}>::Create("pow"),
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FolderFactory<F2A, F2A{std::pow}>::Create("pow"),
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FolderFactory<F2B, F2B{std::pow}>::Create("pow"),
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FolderFactory<F, F{std::sin}>::Create("sin"),
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FolderFactory<F, F{std::sinh}>::Create("sinh"),
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FolderFactory<F, F{std::sqrt}>::Create("sqrt"),
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FolderFactory<F, F{std::tan}>::Create("tan"),
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FolderFactory<F, F{std::tanh}>::Create("tanh"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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// Note regarding cmath:
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// - cmath does not have modulo and erfc_scaled equivalent
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// - C++17 defined standard Bessel math functions std::cyl_bessel_j
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// and std::cyl_neumann that can be used for Fortran j and y
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// bessel functions. However, they are not yet implemented in
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// clang libc++ (ok in GNU libstdc++). Instead, the Posix libm
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// extensions are used when available below.
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#if _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
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/// Define libm extensions
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/// Bessel functions are defined in POSIX.1-2001.
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// Remove float bessel functions for AIX as they are not supported
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#ifndef _AIX
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template <> struct HostRuntimeLibrary<float, LibraryVersion::LibmExtensions> {
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using F = FuncPointer<float, float>;
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using FN = FuncPointer<float, int, float>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{::j0f}>::Create("bessel_j0"),
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FolderFactory<F, F{::j1f}>::Create("bessel_j1"),
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FolderFactory<FN, FN{::jnf}>::Create("bessel_jn"),
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FolderFactory<F, F{::y0f}>::Create("bessel_y0"),
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FolderFactory<F, F{::y1f}>::Create("bessel_y1"),
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FolderFactory<FN, FN{::ynf}>::Create("bessel_yn"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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#endif
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#if HAS_QUADMATHLIB
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template <> struct HostRuntimeLibrary<__float128, LibraryVersion::Libm> {
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using F = FuncPointer<__float128, __float128>;
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using F2 = FuncPointer<__float128, __float128, __float128>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{::acosq}>::Create("acos"),
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FolderFactory<F, F{::acoshq}>::Create("acosh"),
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FolderFactory<F, F{::asinq}>::Create("asin"),
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FolderFactory<F, F{::asinhq}>::Create("asinh"),
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FolderFactory<F, F{::atanq}>::Create("atan"),
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FolderFactory<F2, F2{::atan2q}>::Create("atan2"),
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FolderFactory<F, F{::atanhq}>::Create("atanh"),
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FolderFactory<F, F{::cosq}>::Create("cos"),
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FolderFactory<F, F{::coshq}>::Create("cosh"),
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FolderFactory<F, F{::erfq}>::Create("erf"),
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FolderFactory<F, F{::erfcq}>::Create("erfc"),
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FolderFactory<F, F{::expq}>::Create("exp"),
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FolderFactory<F, F{::tgammaq}>::Create("gamma"),
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FolderFactory<F, F{::logq}>::Create("log"),
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FolderFactory<F, F{::log10q}>::Create("log10"),
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FolderFactory<F, F{::lgammaq}>::Create("log_gamma"),
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FolderFactory<F2, F2{::powq}>::Create("pow"),
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FolderFactory<F, F{::sinq}>::Create("sin"),
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FolderFactory<F, F{::sinhq}>::Create("sinh"),
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FolderFactory<F, F{::tanq}>::Create("tan"),
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FolderFactory<F, F{::tanhq}>::Create("tanh"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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template <> struct HostRuntimeLibrary<__complex128, LibraryVersion::Libm> {
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using F = FuncPointer<__complex128, __complex128>;
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using F2 = FuncPointer<__complex128, __complex128, __complex128>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{::cacosq}>::Create("acos"),
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FolderFactory<F, F{::cacoshq}>::Create("acosh"),
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FolderFactory<F, F{::casinq}>::Create("asin"),
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FolderFactory<F, F{::casinhq}>::Create("asinh"),
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FolderFactory<F, F{::catanq}>::Create("atan"),
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FolderFactory<F, F{::catanhq}>::Create("atanh"),
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FolderFactory<F, F{::ccosq}>::Create("cos"),
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FolderFactory<F, F{::ccoshq}>::Create("cosh"),
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FolderFactory<F, F{::cexpq}>::Create("exp"),
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FolderFactory<F, F{::clogq}>::Create("log"),
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FolderFactory<F2, F2{::cpowq}>::Create("pow"),
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FolderFactory<F, F{::csinq}>::Create("sin"),
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FolderFactory<F, F{::csinhq}>::Create("sinh"),
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FolderFactory<F, F{::csqrtq}>::Create("sqrt"),
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FolderFactory<F, F{::ctanq}>::Create("tan"),
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FolderFactory<F, F{::ctanhq}>::Create("tanh"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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#endif
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template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
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using F = FuncPointer<double, double>;
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using FN = FuncPointer<double, int, double>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{::j0}>::Create("bessel_j0"),
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FolderFactory<F, F{::j1}>::Create("bessel_j1"),
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FolderFactory<FN, FN{::jn}>::Create("bessel_jn"),
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FolderFactory<F, F{::y0}>::Create("bessel_y0"),
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FolderFactory<F, F{::y1}>::Create("bessel_y1"),
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FolderFactory<FN, FN{::yn}>::Create("bessel_yn"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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#if LDBL_MANT_DIG == 80 || LDBL_MANT_DIG == 113
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template <>
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struct HostRuntimeLibrary<long double, LibraryVersion::LibmExtensions> {
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using F = FuncPointer<long double, long double>;
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using FN = FuncPointer<long double, int, long double>;
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static constexpr HostRuntimeFunction table[]{
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FolderFactory<F, F{::j0l}>::Create("bessel_j0"),
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FolderFactory<F, F{::j1l}>::Create("bessel_j1"),
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FolderFactory<FN, FN{::jnl}>::Create("bessel_jn"),
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FolderFactory<F, F{::y0l}>::Create("bessel_y0"),
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FolderFactory<F, F{::y1l}>::Create("bessel_y1"),
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FolderFactory<FN, FN{::ynl}>::Create("bessel_yn"),
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};
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static constexpr HostRuntimeMap map{table};
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static_assert(map.Verify(), "map must be sorted");
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};
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#endif // LDBL_MANT_DIG == 80 || LDBL_MANT_DIG == 113
|
|
#endif //_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
|
|
|
|
/// Define pgmath description
|
|
#if LINK_WITH_LIBPGMATH
|
|
// Only use libpgmath for folding if it is available.
|
|
// First declare all libpgmaths functions
|
|
#define PGMATH_LINKING
|
|
#define PGMATH_DECLARE
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
|
|
#define REAL_FOLDER(name, func) \
|
|
FolderFactory<decltype(&func), &func>::Create(#name)
|
|
template <> struct HostRuntimeLibrary<float, LibraryVersion::PgmathFast> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_FAST
|
|
#define PGMATH_USE_S(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
template <> struct HostRuntimeLibrary<double, LibraryVersion::PgmathFast> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_FAST
|
|
#define PGMATH_USE_D(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
template <> struct HostRuntimeLibrary<float, LibraryVersion::PgmathRelaxed> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_RELAXED
|
|
#define PGMATH_USE_S(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
template <> struct HostRuntimeLibrary<double, LibraryVersion::PgmathRelaxed> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_RELAXED
|
|
#define PGMATH_USE_D(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
template <> struct HostRuntimeLibrary<float, LibraryVersion::PgmathPrecise> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_PRECISE
|
|
#define PGMATH_USE_S(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
template <> struct HostRuntimeLibrary<double, LibraryVersion::PgmathPrecise> {
|
|
static constexpr HostRuntimeFunction table[]{
|
|
#define PGMATH_PRECISE
|
|
#define PGMATH_USE_D(name, func) REAL_FOLDER(name, func),
|
|
#include "flang/Evaluate/pgmath.h.inc"
|
|
};
|
|
static constexpr HostRuntimeMap map{table};
|
|
static_assert(map.Verify(), "map must be sorted");
|
|
};
|
|
|
|
// TODO: double _Complex/float _Complex have been removed from llvm flang
|
|
// pgmath.h.inc because they caused warnings, they need to be added back
|
|
// so that the complex pgmath versions can be used when requested.
|
|
|
|
#endif /* LINK_WITH_LIBPGMATH */
|
|
|
|
// Helper to check if a HostRuntimeLibrary specialization exists
|
|
template <typename T, typename = void> struct IsAvailable : std::false_type {};
|
|
template <typename T>
|
|
struct IsAvailable<T, decltype((void)T::table, void())> : std::true_type {};
|
|
// Define helpers to find host runtime library map according to desired version
|
|
// and type.
|
|
template <typename HostT, LibraryVersion version>
|
|
static const HostRuntimeMap *GetHostRuntimeMapHelper(
|
|
[[maybe_unused]] DynamicType resultType) {
|
|
// A library must only be instantiated if LibraryVersion is
|
|
// available on the host and if HostT maps to a Fortran type.
|
|
// For instance, whenever long double and double are both 64-bits, double
|
|
// is mapped to Fortran 64bits real type, and long double will be left
|
|
// unmapped.
|
|
if constexpr (host::FortranTypeExists<HostT>()) {
|
|
using Lib = HostRuntimeLibrary<HostT, version>;
|
|
if constexpr (IsAvailable<Lib>::value) {
|
|
if (host::FortranType<HostT>{}.GetType() == resultType) {
|
|
return &Lib::map;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
template <LibraryVersion version>
|
|
static const HostRuntimeMap *GetHostRuntimeMapVersion(DynamicType resultType) {
|
|
if (resultType.category() == TypeCategory::Real) {
|
|
if (const auto *map{GetHostRuntimeMapHelper<float, version>(resultType)}) {
|
|
return map;
|
|
}
|
|
if (const auto *map{GetHostRuntimeMapHelper<double, version>(resultType)}) {
|
|
return map;
|
|
}
|
|
if (const auto *map{
|
|
GetHostRuntimeMapHelper<long double, version>(resultType)}) {
|
|
return map;
|
|
}
|
|
#if HAS_QUADMATHLIB
|
|
if (const auto *map{
|
|
GetHostRuntimeMapHelper<__float128, version>(resultType)}) {
|
|
return map;
|
|
}
|
|
#endif
|
|
}
|
|
if (resultType.category() == TypeCategory::Complex) {
|
|
if (const auto *map{GetHostRuntimeMapHelper<std::complex<float>, version>(
|
|
resultType)}) {
|
|
return map;
|
|
}
|
|
if (const auto *map{GetHostRuntimeMapHelper<std::complex<double>, version>(
|
|
resultType)}) {
|
|
return map;
|
|
}
|
|
if (const auto *map{
|
|
GetHostRuntimeMapHelper<std::complex<long double>, version>(
|
|
resultType)}) {
|
|
return map;
|
|
}
|
|
#if HAS_QUADMATHLIB
|
|
if (const auto *map{
|
|
GetHostRuntimeMapHelper<__complex128, version>(resultType)}) {
|
|
return map;
|
|
}
|
|
#endif
|
|
}
|
|
return nullptr;
|
|
}
|
|
static const HostRuntimeMap *GetHostRuntimeMap(
|
|
LibraryVersion version, DynamicType resultType) {
|
|
switch (version) {
|
|
case LibraryVersion::Libm:
|
|
return GetHostRuntimeMapVersion<LibraryVersion::Libm>(resultType);
|
|
case LibraryVersion::LibmExtensions:
|
|
return GetHostRuntimeMapVersion<LibraryVersion::LibmExtensions>(resultType);
|
|
case LibraryVersion::PgmathPrecise:
|
|
return GetHostRuntimeMapVersion<LibraryVersion::PgmathPrecise>(resultType);
|
|
case LibraryVersion::PgmathRelaxed:
|
|
return GetHostRuntimeMapVersion<LibraryVersion::PgmathRelaxed>(resultType);
|
|
case LibraryVersion::PgmathFast:
|
|
return GetHostRuntimeMapVersion<LibraryVersion::PgmathFast>(resultType);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
static const HostRuntimeFunction *SearchInHostRuntimeMap(
|
|
const HostRuntimeMap &map, const std::string &name, DynamicType resultType,
|
|
const std::vector<DynamicType> &argTypes) {
|
|
auto sameNameRange{map.equal_range(name)};
|
|
for (const auto *iter{sameNameRange.first}; iter != sameNameRange.second;
|
|
++iter) {
|
|
if (iter->resultType == resultType && iter->argumentTypes == argTypes) {
|
|
return &*iter;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Search host runtime libraries for an exact type match.
|
|
static const HostRuntimeFunction *SearchHostRuntime(const std::string &name,
|
|
DynamicType resultType, const std::vector<DynamicType> &argTypes) {
|
|
// TODO: When command line options regarding targeted numerical library is
|
|
// available, this needs to be revisited to take it into account. So far,
|
|
// default to libpgmath if F18 is built with it.
|
|
#if LINK_WITH_LIBPGMATH
|
|
if (const auto *map{
|
|
GetHostRuntimeMap(LibraryVersion::PgmathPrecise, resultType)}) {
|
|
if (const auto *hostFunction{
|
|
SearchInHostRuntimeMap(*map, name, resultType, argTypes)}) {
|
|
return hostFunction;
|
|
}
|
|
}
|
|
// Default to libm if functions or types are not available in pgmath.
|
|
#endif
|
|
if (const auto *map{GetHostRuntimeMap(LibraryVersion::Libm, resultType)}) {
|
|
if (const auto *hostFunction{
|
|
SearchInHostRuntimeMap(*map, name, resultType, argTypes)}) {
|
|
return hostFunction;
|
|
}
|
|
}
|
|
if (const auto *map{
|
|
GetHostRuntimeMap(LibraryVersion::LibmExtensions, resultType)}) {
|
|
if (const auto *hostFunction{
|
|
SearchInHostRuntimeMap(*map, name, resultType, argTypes)}) {
|
|
return hostFunction;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Return a DynamicType that can hold all values of a given type.
|
|
// This is used to allow 16bit float to be folded with 32bits and
|
|
// x87 float to be folded with IEEE 128bits.
|
|
static DynamicType BiggerType(DynamicType type) {
|
|
if (type.category() == TypeCategory::Real ||
|
|
type.category() == TypeCategory::Complex) {
|
|
// 16 bits floats to IEEE 32 bits float
|
|
if (type.kind() == common::RealKindForPrecision(11) ||
|
|
type.kind() == common::RealKindForPrecision(8)) {
|
|
return {type.category(), common::RealKindForPrecision(24)};
|
|
}
|
|
// x87 float to IEEE 128 bits float
|
|
if (type.kind() == common::RealKindForPrecision(64)) {
|
|
return {type.category(), common::RealKindForPrecision(113)};
|
|
}
|
|
}
|
|
return type;
|
|
}
|
|
|
|
std::optional<HostRuntimeWrapper> GetHostRuntimeWrapper(const std::string &name,
|
|
DynamicType resultType, const std::vector<DynamicType> &argTypes) {
|
|
if (const auto *hostFunction{SearchHostRuntime(name, resultType, argTypes)}) {
|
|
return hostFunction->folder;
|
|
}
|
|
// If no exact match, search with "bigger" types and insert type
|
|
// conversions around the folder.
|
|
std::vector<evaluate::DynamicType> biggerArgTypes;
|
|
evaluate::DynamicType biggerResultType{BiggerType(resultType)};
|
|
for (auto type : argTypes) {
|
|
biggerArgTypes.emplace_back(BiggerType(type));
|
|
}
|
|
if (const auto *hostFunction{
|
|
SearchHostRuntime(name, biggerResultType, biggerArgTypes)}) {
|
|
return [hostFunction, resultType](
|
|
FoldingContext &context, std::vector<Expr<SomeType>> &&args) {
|
|
auto nArgs{args.size()};
|
|
for (size_t i{0}; i < nArgs; ++i) {
|
|
args[i] = Fold(context,
|
|
ConvertToType(hostFunction->argumentTypes[i], std::move(args[i]))
|
|
.value());
|
|
}
|
|
return Fold(context,
|
|
ConvertToType(
|
|
resultType, hostFunction->folder(context, std::move(args)))
|
|
.value());
|
|
};
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
} // namespace Fortran::evaluate
|