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/**************************************************************************
*
* Copyright 2008 Dennis Smit
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* AUTHORS, COPYRIGHT HOLDERS, AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
***************************************************************************/
/**
* @file
* CPU feature detection.
*
* @author Dennis Smit
* @author Based on the work of Eric Anholt <anholt@FreeBSD.org>
*/
#ifndef _UTIL_CPU_DETECT_H
#define _UTIL_CPU_DETECT_H
#include "pipe/p_config.h"
#include "util/u_thread.h"
#ifdef __cplusplus
extern "C" {
#endif
enum cpu_family {
CPU_UNKNOWN,
CPU_AMD_ZEN1_ZEN2,
CPU_AMD_ZEN_HYGON,
CPU_AMD_ZEN3,
CPU_AMD_ZEN_NEXT,
CPU_AMD_LAST,
};
typedef uint32_t util_affinity_mask[UTIL_MAX_CPUS / 32];
struct util_cpu_caps_t {
/**
* Number of CPUs available to the process.
*
* This will be less than or equal to \c max_cpus. This is the number of
* CPUs that are online and available to the process.
*/
int16_t nr_cpus;
/**
* Maximum number of CPUs that can be online in the system.
*
* This will be greater than or equal to \c nr_cpus. This is the number of
* CPUs installed in the system. \c nr_cpus will be less if some CPUs are
* offline.
*/
int16_t max_cpus;
enum cpu_family family;
/* Feature flags */
int x86_cpu_type;
unsigned cacheline;
unsigned has_intel:1;
unsigned has_tsc:1;
unsigned has_mmx:1;
unsigned has_mmx2:1;
unsigned has_sse:1;
unsigned has_sse2:1;
unsigned has_sse3:1;
unsigned has_ssse3:1;
unsigned has_sse4_1:1;
unsigned has_sse4_2:1;
unsigned has_popcnt:1;
unsigned has_avx:1;
unsigned has_avx2:1;
unsigned has_f16c:1;
unsigned has_fma:1;
unsigned has_3dnow:1;
unsigned has_3dnow_ext:1;
unsigned has_xop:1;
unsigned has_altivec:1;
unsigned has_vsx:1;
unsigned has_daz:1;
unsigned has_neon:1;
unsigned has_msa:1;
unsigned has_avx512f:1;
unsigned has_avx512dq:1;
unsigned has_avx512ifma:1;
unsigned has_avx512pf:1;
unsigned has_avx512er:1;
unsigned has_avx512cd:1;
unsigned has_avx512bw:1;
unsigned has_avx512vl:1;
unsigned has_avx512vbmi:1;
unsigned num_L3_caches;
unsigned num_cpu_mask_bits;
uint16_t cpu_to_L3[UTIL_MAX_CPUS];
/* Affinity masks for each L3 cache. */
util_affinity_mask *L3_affinity_mask;
};
#define U_CPU_INVALID_L3 0xffff
static inline const struct util_cpu_caps_t *
util_get_cpu_caps(void)
{
extern struct util_cpu_caps_t util_cpu_caps;
/* If you hit this assert, it means that something is using the
* cpu-caps without having first called util_cpu_detect()
*/
assert(util_cpu_caps.nr_cpus >= 1);
return &util_cpu_caps;
}
void util_cpu_detect(void);
#ifdef __cplusplus
}
#endif
#endif /* _UTIL_CPU_DETECT_H */
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