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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#ifndef KOKKOS_SIMD_TESTING_UTILITIES_HPP
#define KOKKOS_SIMD_TESTING_UTILITIES_HPP
#include <gtest/gtest.h>
#include <Kokkos_SIMD.hpp>
#include <SIMDTesting_Ops.hpp>
class gtest_checker {
public:
void truth(bool x) const { EXPECT_TRUE(x); }
template <class T>
void equality(T const& a, T const& b) const {
if constexpr (std::is_same_v<T, double>) {
EXPECT_DOUBLE_EQ(a, b);
} else if constexpr (std::is_same_v<T, float>) {
EXPECT_FLOAT_EQ(a, b);
} else {
EXPECT_EQ(a, b);
}
}
};
class kokkos_checker {
public:
KOKKOS_INLINE_FUNCTION void truth(bool x) const {
if (!x) Kokkos::abort("SIMD unit test truth condition failed on device");
}
template <class T>
KOKKOS_INLINE_FUNCTION void equality(T const& a, T const& b) const {
#if defined(KOKKOS_IMPL_32BIT)
// This is needed to work around a bug where the comparison fails because it
// is done on the x87 fpu (which is the default for 32 bit gcc) in long
// double and a and b end up being different in long double but have the
// same value when casted to float or double. (see
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=323#c109)
T const volatile va = a;
T const volatile vb = b;
if (va != vb)
Kokkos::abort("SIMD unit test equality condition failed on device");
#else
if (a != b)
Kokkos::abort("SIMD unit test equality condition failed on device");
#endif
}
};
template <class T, class Abi>
inline void host_check_equality(
Kokkos::Experimental::basic_simd<T, Abi> const& expected_result,
Kokkos::Experimental::basic_simd<T, Abi> const& computed_result,
std::size_t nlanes) {
gtest_checker checker;
for (std::size_t i = 0; i < nlanes; ++i) {
checker.equality(expected_result[i], computed_result[i]);
}
}
template <class T, class Abi>
KOKKOS_INLINE_FUNCTION void device_check_equality(
Kokkos::Experimental::basic_simd<T, Abi> const& expected_result,
Kokkos::Experimental::basic_simd<T, Abi> const& computed_result,
std::size_t nlanes) {
kokkos_checker checker;
for (std::size_t i = 0; i < nlanes; ++i) {
checker.equality(expected_result[i], computed_result[i]);
}
}
template <typename T, typename Abi>
KOKKOS_INLINE_FUNCTION void check_equality(
Kokkos::Experimental::basic_simd<T, Abi> const& expected_result,
Kokkos::Experimental::basic_simd<T, Abi> const& computed_result,
std::size_t nlanes) {
KOKKOS_IF_ON_HOST(
(host_check_equality(expected_result, computed_result, nlanes);))
KOKKOS_IF_ON_DEVICE(
(device_check_equality(expected_result, computed_result, nlanes);))
}
class load_element_aligned {
public:
template <class T, class Abi>
bool host_load(T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
if (n < result.size()) return false;
result.copy_from(mem, Kokkos::Experimental::simd_flag_default);
return true;
}
template <class T, class Abi>
KOKKOS_INLINE_FUNCTION bool device_load(
T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
if (n < result.size()) return false;
result.copy_from(mem, Kokkos::Experimental::simd_flag_default);
return true;
}
};
class load_vector_aligned {
public:
template <class T, class Abi>
bool host_load(T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
if (n < result.size()) return false;
result.copy_from(mem, Kokkos::Experimental::simd_flag_aligned);
return true;
}
template <class T, class Abi>
KOKKOS_INLINE_FUNCTION bool device_load(
T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
if (n < result.size()) return false;
result.copy_from(mem, Kokkos::Experimental::simd_flag_aligned);
return true;
}
};
class load_masked {
public:
template <class T, class Abi>
bool host_load(T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
using mask_type =
typename Kokkos::Experimental::basic_simd<T, Abi>::mask_type;
mask_type mask(KOKKOS_LAMBDA(std::size_t i) { return i < n; });
result = T(0);
where(mask, result).copy_from(mem, Kokkos::Experimental::simd_flag_default);
return true;
}
template <class T, class Abi>
KOKKOS_INLINE_FUNCTION bool device_load(
T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
using mask_type =
typename Kokkos::Experimental::basic_simd<T, Abi>::mask_type;
mask_type mask(KOKKOS_LAMBDA(std::size_t i) { return i < n; });
where(mask, result).copy_from(mem, Kokkos::Experimental::simd_flag_default);
where(!mask, result) = T(0);
return true;
}
};
class load_as_scalars {
public:
template <class T, class Abi>
bool host_load(T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
Kokkos::Experimental::basic_simd<T, Abi> init(
KOKKOS_LAMBDA(std::size_t i) { return (i < n) ? mem[i] : T(0); });
result = init;
return true;
}
template <class T, class Abi>
KOKKOS_INLINE_FUNCTION bool device_load(
T const* mem, std::size_t n,
Kokkos::Experimental::basic_simd<T, Abi>& result) const {
Kokkos::Experimental::basic_simd<T, Abi> init(
KOKKOS_LAMBDA(std::size_t i) { return (i < n) ? mem[i] : T(0); });
result = init;
return true;
}
};
// Simple check to loosely test that T is a complete type.
// Some capabilities are only defined for specific data type and abi pairs (i.e.
// extended vector width); this is used to exclude pairs that
// are not defined from being tested.
template <typename T, typename = void>
constexpr bool is_type_v = false;
template <typename T>
constexpr bool is_type_v<T, decltype(void(sizeof(T)))> = true;
// We consider a fully-implemented 'simd' type is always accompanied by the
// same-capability 'simd_mask' type
template <typename DataType, typename Abi>
constexpr bool is_simd_avail_v =
is_type_v<Kokkos::Experimental::basic_simd<DataType, Abi>> &&
is_type_v<Kokkos::Experimental::basic_simd_mask<DataType, Abi>>;
#endif
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