mirror of
https://github.com/KolibriOS/kolibrios.git
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117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/*
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* Copyright (c) 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Chris Wilson <chris@chris-wilson.co.uk>
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "sna.h"
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#include "sna_cpuid.h"
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#define xgetbv(index,eax,edx) \
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__asm__ ("xgetbv" : "=a"(eax), "=d"(edx) : "c" (index))
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#define has_YMM 0x1
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unsigned sna_cpu_detect(void)
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{
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unsigned max = __get_cpuid_max(BASIC_CPUID, NULL);
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unsigned int eax, ebx, ecx, edx;
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unsigned features = 0;
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unsigned extra = 0;
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if (max >= 1) {
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__cpuid(1, eax, ebx, ecx, edx);
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if (ecx & bit_SSE3)
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features |= SSE3;
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if (ecx & bit_SSSE3)
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features |= SSSE3;
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if (ecx & bit_SSE4_1)
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features |= SSE4_1;
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if (ecx & bit_SSE4_2)
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features |= SSE4_2;
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if (ecx & bit_OSXSAVE) {
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unsigned int bv_eax, bv_ecx;
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xgetbv(0, bv_eax, bv_ecx);
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if ((bv_eax & 6) == 6)
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extra |= has_YMM;
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}
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if ((extra & has_YMM) && (ecx & bit_AVX))
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features |= AVX;
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if (edx & bit_MMX)
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features |= MMX;
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if (edx & bit_SSE)
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features |= SSE;
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if (edx & bit_SSE2)
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features |= SSE2;
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}
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if (max >= 7) {
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__cpuid_count(7, 0, eax, ebx, ecx, edx);
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if ((extra & has_YMM) && (ebx & bit_AVX2))
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features |= AVX2;
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}
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return features;
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}
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char *sna_cpu_features_to_string(unsigned features, char *line)
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{
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char *ret = line;
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#ifdef __x86_64__
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line += sprintf (line, "x86-64");
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#else
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line += sprintf (line, "x86");
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#endif
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if (features & SSE2)
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line += sprintf (line, ", sse2");
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if (features & SSE3)
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line += sprintf (line, ", sse3");
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if (features & SSSE3)
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line += sprintf (line, ", ssse3");
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if (features & SSE4_1)
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line += sprintf (line, ", sse4.1");
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if (features & SSE4_2)
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line += sprintf (line, ", sse4.2");
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if (features & AVX)
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line += sprintf (line, ", avx");
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if (features & AVX2)
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line += sprintf (line, ", avx2");
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return ret;
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}
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