diff options
Diffstat (limited to 'vppinfra/vppinfra/cpu.h')
| -rw-r--r-- | vppinfra/vppinfra/cpu.h | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/vppinfra/vppinfra/cpu.h b/vppinfra/vppinfra/cpu.h index 79cdf74f..961af709 100644 --- a/vppinfra/vppinfra/cpu.h +++ b/vppinfra/vppinfra/cpu.h @@ -16,7 +16,83 @@ #ifndef included_clib_cpu_h #define included_clib_cpu_h +#include <vppinfra/format.h> + +/* + * multiarchitecture support. Adding new entry will produce + * new graph node function variant optimized for specific cpu + * microarchitecture. + * Order is important for runtime selection, as 1st match wins... + */ + +#if __x86_64__ && CLIB_DEBUG == 0 +#define foreach_march_variant(macro, x) \ + macro(avx2, x, "arch=core-avx2") +#else +#define foreach_march_variant(macro, x) +#endif + + +#if __GNUC__ > 4 && !__clang__ +#define CLIB_CPU_OPTIMIZED __attribute__ ((optimize ("tree-vectorize"))) +#else +#define CLIB_CPU_OPTIMIZED +#endif + + +#define CLIB_MULTIARCH_ARCH_CHECK(arch, fn, tgt) \ + if (clib_cpu_supports_ ## arch()) \ + return & fn ## _ ##arch; + +#define CLIB_MULTIARCH_SELECT_FN(fn,...) \ + __VA_ARGS__ void * fn ## _multiarch_select(void) \ +{ \ + foreach_march_variant(CLIB_MULTIARCH_ARCH_CHECK, fn) \ + return & fn; \ +} + +#if __x86_64__ +#include "cpuid.h" + +#define foreach_x86_64_flags \ +_ (sse3, 1, ecx, 0) \ +_ (ssse3, 1, ecx, 9) \ +_ (sse41, 1, ecx, 19) \ +_ (sse42, 1, ecx, 20) \ +_ (avx, 1, ecx, 28) \ +_ (avx2, 7, ebx, 5) \ +_ (avx512f, 7, ebx, 16) \ +_ (aes, 1, ecx, 25) \ +_ (sha, 7, ebx, 29) + +static inline int +clib_get_cpuid(const u32 lev, u32 * eax, u32 *ebx, u32 * ecx, u32 * edx) +{ + if ((u32) __get_cpuid_max (0x80000000 & lev, 0) < lev) + return 0; + if (lev == 7) + __cpuid_count(lev, 0, *eax, *ebx, *ecx, *edx); + else + __cpuid(lev, *eax, *ebx, *ecx, *edx); + return 1; +} + + +#define _(flag, func, reg, bit) \ +static inline int \ +clib_cpu_supports_ ## flag() \ +{ \ + u32 __attribute__((unused)) eax, ebx = 0, ecx = 0, edx = 0; \ + clib_get_cpuid (func, &eax, &ebx, &ecx, &edx); \ + \ + return ((reg & (1 << bit)) != 0); \ +} + foreach_x86_64_flags +#undef _ +#endif + format_function_t format_cpu_uarch; format_function_t format_cpu_model_name; +format_function_t format_cpu_flags; -#endif
\ No newline at end of file +#endif |