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core: fix mm_pause() for non-SSE i386 builds

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replaced to safe binary compatible 'rep; nop' asm instruction
This commit is contained in:
Alexander Alekhin 2018-04-09 18:25:51 +03:00
parent 474a23bda5
commit 7dc162cb42
1 changed files with 5 additions and 1 deletions
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6
modules/core/src/parallel_impl.cpp
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@ -49,7 +49,11 @@ DECLARE_CV_YIELD
DECLARE_CV_PAUSE DECLARE_CV_PAUSE
#endif #endif
#ifndef CV_PAUSE #ifndef CV_PAUSE
#if defined __GNUC__ && (defined __i386__ || defined __x86_64__) # if defined __GNUC__ && (defined __i386__ || defined __x86_64__)
# if !defined(__SSE__)
static inline void cv_non_sse_mm_pause() { __asm__ __volatile__ ("rep; nop"); }
# define _mm_pause cv_non_sse_mm_pause
# endif
# define CV_PAUSE(v) do { for (int __delay = (v); __delay > 0; --__delay) { _mm_pause(); } } while (0) # define CV_PAUSE(v) do { for (int __delay = (v); __delay > 0; --__delay) { _mm_pause(); } } while (0)
# elif defined __GNUC__ && defined __aarch64__ # elif defined __GNUC__ && defined __aarch64__
# define CV_PAUSE(v) do { for (int __delay = (v); __delay > 0; --__delay) { asm volatile("yield" ::: "memory"); } } while (0) # define CV_PAUSE(v) do { for (int __delay = (v); __delay > 0; --__delay) { asm volatile("yield" ::: "memory"); } } while (0)