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ggml-cpu: add ggml_thread_cpu_relax with Zihintpause support #17784

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ggml-cpu: add ggml_thread_cpu_relax with Zihintpause support #17784

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9 changes: 9 additions & 0 deletions ggml/src/ggml-cpu/ggml-cpu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -490,6 +490,15 @@ static inline void ggml_thread_cpu_relax(void) {
static inline void ggml_thread_cpu_relax(void) {
_mm_pause();
}
#elif defined(__riscv)
static inline void ggml_thread_cpu_relax(void) {
#ifdef __riscv_zihintpause
__asm__ __volatile__ ("pause");
#else
/* Encoding of the pause instruction */
__asm__ __volatile__ (".4byte 0x100000F");
#endif
}
#else
static inline void ggml_thread_cpu_relax(void) {;}
#endif
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