| 0,0 → 1,116 |
|---|
| /* |
| * Copyright (c) 2013 Intel Corporation |
| * |
| * 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 |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| * |
| * Authors: |
| * Chris Wilson <chris@chris-wilson.co.uk> |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "sna.h" |
| #include "sna_cpuid.h" |
| |
| #define xgetbv(index,eax,edx) \ |
| __asm__ ("xgetbv" : "=a"(eax), "=d"(edx) : "c" (index)) |
| |
| #define has_YMM 0x1 |
| |
| unsigned sna_cpu_detect(void) |
| { |
| unsigned max = __get_cpuid_max(BASIC_CPUID, NULL); |
| unsigned int eax, ebx, ecx, edx; |
| unsigned features = 0; |
| unsigned extra = 0; |
| |
| if (max >= 1) { |
| __cpuid(1, eax, ebx, ecx, edx); |
| if (ecx & bit_SSE3) |
| features |= SSE3; |
| |
| if (ecx & bit_SSSE3) |
| features |= SSSE3; |
| |
| if (ecx & bit_SSE4_1) |
| features |= SSE4_1; |
| |
| if (ecx & bit_SSE4_2) |
| features |= SSE4_2; |
| |
| if (ecx & bit_OSXSAVE) { |
| unsigned int bv_eax, bv_ecx; |
| xgetbv(0, bv_eax, bv_ecx); |
| if ((bv_eax & 6) == 6) |
| extra |= has_YMM; |
| } |
| |
| if ((extra & has_YMM) && (ecx & bit_AVX)) |
| features |= AVX; |
| |
| if (edx & bit_MMX) |
| features |= MMX; |
| |
| if (edx & bit_SSE) |
| features |= SSE; |
| |
| if (edx & bit_SSE2) |
| features |= SSE2; |
| } |
| |
| if (max >= 7) { |
| __cpuid_count(7, 0, eax, ebx, ecx, edx); |
| if ((extra & has_YMM) && (ebx & bit_AVX2)) |
| features |= AVX2; |
| } |
| |
| return features; |
| } |
| |
| char *sna_cpu_features_to_string(unsigned features, char *line) |
| { |
| char *ret = line; |
| |
| #ifdef __x86_64__ |
| line += sprintf (line, "x86-64"); |
| #else |
| line += sprintf (line, "x86"); |
| #endif |
| |
| if (features & SSE2) |
| line += sprintf (line, ", sse2"); |
| if (features & SSE3) |
| line += sprintf (line, ", sse3"); |
| if (features & SSSE3) |
| line += sprintf (line, ", ssse3"); |
| if (features & SSE4_1) |
| line += sprintf (line, ", sse4.1"); |
| if (features & SSE4_2) |
| line += sprintf (line, ", sse4.2"); |
| if (features & AVX) |
| line += sprintf (line, ", avx"); |
| if (features & AVX2) |
| line += sprintf (line, ", avx2"); |
| |
| return ret; |
| } |