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test_power.cpp
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/***************************************************************************
* Copyright (c) Johan Mabille, Sylvain Corlay, Wolf Vollprecht and *
* Martin Renou *
* Copyright (c) QuantStack *
* Copyright (c) Serge Guelton *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#include "xsimd/xsimd.hpp"
#ifndef XSIMD_NO_SUPPORTED_ARCHITECTURE
#include "test_utils.hpp"
template <class B>
struct power_test
{
using batch_type = B;
using value_type = typename B::value_type;
static constexpr size_t size = B::size;
using vector_type = std::vector<value_type>;
size_t nb_input;
vector_type zero_input;
vector_type zlhs_input;
vector_type lhs_input;
vector_type rhs_input;
vector_type expected;
vector_type res;
power_test()
{
nb_input = size * 10000;
zero_input.resize(nb_input);
zlhs_input.resize(nb_input);
lhs_input.resize(nb_input);
rhs_input.resize(nb_input);
for (size_t i = 0; i < nb_input; ++i)
{
zero_input[i] = 0;
lhs_input[i] = value_type(i) / 4 + value_type(1.2) * std::sqrt(value_type(i + 0.25));
zlhs_input[i] = lhs_input[i] * (i % 2);
rhs_input[i] = value_type(10.2) / (i + 2) + value_type(0.25);
}
expected.resize(nb_input);
res.resize(nb_input);
}
void test_power_functions()
{
// pow
{
std::transform(lhs_input.cbegin(), lhs_input.cend(), rhs_input.cbegin(), expected.begin(),
[](const value_type& l, const value_type& r)
{ return std::pow(l, r); });
batch_type lhs_in, rhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(lhs_in, lhs_input, i);
detail::load_batch(rhs_in, rhs_input, i);
out = pow(lhs_in, rhs_in);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("pow");
CHECK_EQ(diff, 0);
}
// pow zero
{
std::transform(zlhs_input.cbegin(), zlhs_input.cend(), rhs_input.cbegin(), expected.begin(),
[](const value_type& l, const value_type& r)
{ return std::pow(l, r); });
batch_type zlhs_in, rhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(zlhs_in, zlhs_input, i);
detail::load_batch(rhs_in, rhs_input, i);
out = pow(zlhs_in, rhs_in);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("0 ^ x");
CHECK_EQ(diff, 0);
// use of undeclared identifier '_MM_SET_EXCEPTION_MASK for emscripten
#if defined(__SSE__) && !defined(EMSCRIPTEN)
// Test with FE_INVALID...
unsigned mask = _MM_GET_EXCEPTION_MASK();
_MM_SET_EXCEPTION_MASK(mask & ~_MM_MASK_INVALID);
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(zlhs_in, zlhs_input, i);
detail::load_batch(rhs_in, rhs_input, i);
out = pow(zlhs_in, rhs_in);
detail::store_batch(out, res, i);
}
_MM_SET_EXCEPTION_MASK(mask);
diff = detail::get_nb_diff(res, expected);
INFO("0 ^ x with exception");
CHECK_EQ(diff, 0);
#endif
}
// pow 0^-x
{
std::transform(zero_input.cbegin(), zero_input.cend(), rhs_input.cbegin(), expected.begin(),
[](const value_type& z, const value_type& r)
{ return std::pow(z, -r); });
batch_type zero_in, rhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(zero_in, zero_input, i);
detail::load_batch(rhs_in, rhs_input, i);
out = pow(zero_in, -rhs_in);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("pow(0, -x)");
CHECK_EQ(diff, 0);
}
// ipow
{
long k = 0;
std::transform(lhs_input.cbegin(), lhs_input.cend(), expected.begin(),
[&k, this](const value_type& l)
{ auto arg = k / size - nb_input / size / 2; ++k; return std::pow(l, arg); });
batch_type lhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(lhs_in, lhs_input, i);
out = pow(lhs_in, i / size - nb_input / size / 2);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("ipow");
CHECK_EQ(diff, 0);
}
// hypot
{
std::transform(lhs_input.cbegin(), lhs_input.cend(), rhs_input.cbegin(), expected.begin(),
[](const value_type& l, const value_type& r)
{ return std::hypot(l, r); });
batch_type lhs_in, rhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(lhs_in, lhs_input, i);
detail::load_batch(rhs_in, rhs_input, i);
out = hypot(lhs_in, rhs_in);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("hypot");
CHECK_EQ(diff, 0);
}
// cbrt
{
std::transform(lhs_input.cbegin(), lhs_input.cend(), expected.begin(),
[](const value_type& l)
{ return std::cbrt(l); });
batch_type lhs_in, out;
for (size_t i = 0; i < nb_input; i += size)
{
detail::load_batch(lhs_in, lhs_input, i);
out = cbrt(lhs_in);
detail::store_batch(out, res, i);
}
size_t diff = detail::get_nb_diff(res, expected);
INFO("cbrt");
CHECK_EQ(diff, 0);
}
}
};
TEST_CASE_TEMPLATE("[power]", B, BATCH_FLOAT_TYPES)
{
power_test<B> Test;
Test.test_power_functions();
}
#endif