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//===-- runtime/dot-product.cpp -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "cpp-type.h"
#include "descriptor.h"
#include "reduction.h"
#include "terminator.h"
#include "tools.h"
#include <cinttypes>
namespace Fortran::runtime {
template <typename RESULT, TypeCategory XCAT, typename XT, typename YT>
class Accumulator {
public:
using Result = RESULT;
Accumulator(const Descriptor &x, const Descriptor &y) : x_{x}, y_{y} {}
void Accumulate(SubscriptValue xAt, SubscriptValue yAt) {
if constexpr (XCAT == TypeCategory::Complex) {
sum_ += std::conj(static_cast<Result>(*x_.Element<XT>(&xAt))) *
static_cast<Result>(*y_.Element<YT>(&yAt));
} else if constexpr (XCAT == TypeCategory::Logical) {
sum_ = sum_ ||
(IsLogicalElementTrue(x_, &xAt) && IsLogicalElementTrue(y_, &yAt));
} else {
sum_ += static_cast<Result>(*x_.Element<XT>(&xAt)) *
static_cast<Result>(*y_.Element<YT>(&yAt));
}
}
Result GetResult() const { return sum_; }
private:
const Descriptor &x_, &y_;
Result sum_{};
};
template <typename RESULT, TypeCategory XCAT, typename XT, typename YT>
static inline RESULT DoDotProduct(
const Descriptor &x, const Descriptor &y, Terminator &terminator) {
RUNTIME_CHECK(terminator, x.rank() == 1 && y.rank() == 1);
SubscriptValue n{x.GetDimension(0).Extent()};
if (SubscriptValue yN{y.GetDimension(0).Extent()}; yN != n) {
terminator.Crash(
"DOT_PRODUCT: SIZE(VECTOR_A) is %jd but SIZE(VECTOR_B) is %jd",
static_cast<std::intmax_t>(n), static_cast<std::intmax_t>(yN));
}
if constexpr (std::is_same_v<XT, YT>) {
if constexpr (std::is_same_v<XT, float>) {
// TODO: call BLAS-1 SDOT or SDSDOT
} else if constexpr (std::is_same_v<XT, double>) {
// TODO: call BLAS-1 DDOT
} else if constexpr (std::is_same_v<XT, std::complex<float>>) {
// TODO: call BLAS-1 CDOTC
} else if constexpr (std::is_same_v<XT, std::complex<float>>) {
// TODO: call BLAS-1 ZDOTC
}
}
SubscriptValue xAt{x.GetDimension(0).LowerBound()};
SubscriptValue yAt{y.GetDimension(0).LowerBound()};
Accumulator<RESULT, XCAT, XT, YT> accumulator{x, y};
for (SubscriptValue j{0}; j < n; ++j) {
accumulator.Accumulate(xAt++, yAt++);
}
return accumulator.GetResult();
}
template <TypeCategory RCAT, int RKIND> struct DotProduct {
using Result = CppTypeFor<RCAT, RKIND>;
template <TypeCategory XCAT, int XKIND> struct DP1 {
template <TypeCategory YCAT, int YKIND> struct DP2 {
Result operator()(const Descriptor &x, const Descriptor &y,
Terminator &terminator) const {
if constexpr (constexpr auto resultType{
GetResultType(XCAT, XKIND, YCAT, YKIND)}) {
if constexpr (resultType->first == RCAT &&
resultType->second <= RKIND) {
return DoDotProduct<Result, XCAT, CppTypeFor<XCAT, XKIND>,
CppTypeFor<YCAT, YKIND>>(x, y, terminator);
}
}
terminator.Crash(
"DOT_PRODUCT(%d(%d)): bad operand types (%d(%d), %d(%d))",
static_cast<int>(RCAT), RKIND, static_cast<int>(XCAT), XKIND,
static_cast<int>(YCAT), YKIND);
}
};
Result operator()(const Descriptor &x, const Descriptor &y,
Terminator &terminator, TypeCategory yCat, int yKind) const {
return ApplyType<DP2, Result>(yCat, yKind, terminator, x, y, terminator);
}
};
Result operator()(const Descriptor &x, const Descriptor &y,
const char *source, int line) const {
Terminator terminator{source, line};
auto xCatKind{x.type().GetCategoryAndKind()};
auto yCatKind{y.type().GetCategoryAndKind()};
RUNTIME_CHECK(terminator, xCatKind.has_value() && yCatKind.has_value());
return ApplyType<DP1, Result>(xCatKind->first, xCatKind->second, terminator,
x, y, terminator, yCatKind->first, yCatKind->second);
}
};
extern "C" {
std::int8_t RTNAME(DotProductInteger1)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Integer, 8>{}(x, y, source, line);
}
std::int16_t RTNAME(DotProductInteger2)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Integer, 8>{}(x, y, source, line);
}
std::int32_t RTNAME(DotProductInteger4)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Integer, 8>{}(x, y, source, line);
}
std::int64_t RTNAME(DotProductInteger8)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Integer, 8>{}(x, y, source, line);
}
#ifdef __SIZEOF_INT128__
common::int128_t RTNAME(DotProductInteger16)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Integer, 16>{}(x, y, source, line);
}
#endif
// TODO: REAL/COMPLEX(2 & 3)
float RTNAME(DotProductReal4)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Real, 8>{}(x, y, source, line);
}
double RTNAME(DotProductReal8)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Real, 8>{}(x, y, source, line);
}
#if LONG_DOUBLE == 80
long double RTNAME(DotProductReal10)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Real, 10>{}(x, y, source, line);
}
#elif LONG_DOUBLE == 128
long double RTNAME(DotProductReal16)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Real, 16>{}(x, y, source, line);
}
#endif
void RTNAME(CppDotProductComplex4)(std::complex<float> &result,
const Descriptor &x, const Descriptor &y, const char *source, int line) {
auto z{DotProduct<TypeCategory::Complex, 8>{}(x, y, source, line)};
result = std::complex<float>{
static_cast<float>(z.real()), static_cast<float>(z.imag())};
}
void RTNAME(CppDotProductComplex8)(std::complex<double> &result,
const Descriptor &x, const Descriptor &y, const char *source, int line) {
result = DotProduct<TypeCategory::Complex, 8>{}(x, y, source, line);
}
#if LONG_DOUBLE == 80
void RTNAME(CppDotProductComplex10)(std::complex<long double> &result,
const Descriptor &x, const Descriptor &y, const char *source, int line) {
result = DotProduct<TypeCategory::Complex, 10>{}(x, y, source, line);
}
#elif LONG_DOUBLE == 128
void RTNAME(CppDotProductComplex16)(std::complex<long double> &result,
const Descriptor &x, const Descriptor &y, const char *source, int line) {
result = DotProduct<TypeCategory::Complex, 16>{}(x, y, source, line);
}
#endif
bool RTNAME(DotProductLogical)(
const Descriptor &x, const Descriptor &y, const char *source, int line) {
return DotProduct<TypeCategory::Logical, 1>{}(x, y, source, line);
}
} // extern "C"
} // namespace Fortran::runtime
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