| /* loongarch_features.c -- check for LoongArch features. |
| * |
| * Copyright (C) 2025 Vladislav Shchapov <vladislav@shchapov.ru> |
| * |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #ifdef LOONGARCH_FEATURES |
| |
| #include "zbuild.h" |
| #include "loongarch_features.h" |
| |
| #include <larchintrin.h> |
| |
| /* |
| * https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html |
| * |
| * Word number Bit number Annotation Implication |
| * 0x1 25 CRC 1 indicates support for CRC instruction |
| * 0x1 6 LSX 1 indicates support for 128-bit vector extension |
| * 0x1 7 LASX 1 indicates support for 256-bit vector expansion |
| */ |
| |
| void Z_INTERNAL loongarch_check_features(struct loongarch_cpu_features *features) { |
| unsigned int w1 = __cpucfg(0x1); |
| features->has_crc = w1 & 0x2000000; |
| features->has_lsx = w1 & 0x40; |
| features->has_lasx = w1 & 0x80; |
| } |
| |
| #endif |
