mirror of
https://github.com/mhx/dwarfs.git
synced 2025-08-04 02:06:22 -04:00
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et: */
|
|
/**
|
|
* \author Marcus Holland-Moritz (github@mhxnet.de)
|
|
* \copyright Copyright (c) Marcus Holland-Moritz
|
|
*
|
|
* This file is part of ricepp.
|
|
*
|
|
* ricepp is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* ricepp is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with ricepp. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
|
|
#include "cpu_variant.h"
|
|
|
|
namespace ricepp::detail {
|
|
|
|
namespace {
|
|
|
|
detail::cpu_variant get_cpu_variant_init() {
|
|
#ifndef _WIN32
|
|
#if defined(__has_builtin)
|
|
#if __has_builtin(__builtin_cpu_supports) && \
|
|
(defined(RICEPP_CPU_BMI2) || defined(RICEPP_CPU_BMI2_AVX512))
|
|
__builtin_cpu_init();
|
|
|
|
bool const has_avx512vl = __builtin_cpu_supports("avx512vl");
|
|
bool const has_avx512vbmi = __builtin_cpu_supports("avx512vbmi");
|
|
bool const has_bmi2 = __builtin_cpu_supports("bmi2");
|
|
|
|
if (has_avx512vl && has_avx512vbmi && has_bmi2) {
|
|
return detail::cpu_variant::has_bmi2_avx512;
|
|
}
|
|
|
|
if (has_bmi2) {
|
|
return detail::cpu_variant::has_bmi2;
|
|
}
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
return detail::cpu_variant::fallback;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
detail::cpu_variant get_cpu_variant() {
|
|
static detail::cpu_variant const variant = get_cpu_variant_init();
|
|
return variant;
|
|
}
|
|
|
|
void show_cpu_variant(std::string_view variant) {
|
|
if (std::getenv("RICEPP_SHOW_CPU_VARIANT")) {
|
|
std::cerr << "ricepp: using " << variant << " CPU variant\n";
|
|
}
|
|
}
|
|
|
|
void show_cpu_variant_once(std::string_view variant) {
|
|
static auto const _ = [&variant]() {
|
|
show_cpu_variant(variant);
|
|
return true;
|
|
}();
|
|
}
|
|
|
|
} // namespace ricepp::detail
|