cpu.c (1963B)
1 /* 2 * Copyright © 2023, VideoLAN and dav1d authors 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, this 9 * list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "common/attributes.h" 29 30 #include "src/cpu.h" 31 #include "src/loongarch/cpu.h" 32 33 #if HAVE_GETAUXVAL 34 #include <sys/auxv.h> 35 36 #define LA_HWCAP_LSX ( 1 << 4 ) 37 #define LA_HWCAP_LASX ( 1 << 5 ) 38 #endif 39 40 COLD unsigned dav1d_get_cpu_flags_loongarch(void) { 41 unsigned flags = dav1d_get_default_cpu_flags(); 42 #if HAVE_GETAUXVAL 43 unsigned long hw_cap = dav1d_getauxval(AT_HWCAP); 44 flags |= (hw_cap & LA_HWCAP_LSX) ? DAV1D_LOONGARCH_CPU_FLAG_LSX : 0; 45 flags |= (hw_cap & LA_HWCAP_LASX) ? DAV1D_LOONGARCH_CPU_FLAG_LASX : 0; 46 #endif 47 48 return flags; 49 }