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spin_delay.hpp: fix for Darwin PPC #3129

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merged 3 commits into from
Jan 30, 2023
Merged

spin_delay.hpp: fix for Darwin PPC #3129

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2904595
spin_delay.hpp: fix for Darwin PPC
barracuda156 Jan 30, 2023
2fb5449
[MISC] clang-format
seqan-actions Jan 30, 2023
619db34
[MISC] touch-up style
eseiler Jan 30, 2023
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21 changes: 13 additions & 8 deletions include/seqan3/utility/parallel/detail/spin_delay.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -14,17 +14,19 @@

#include <thread>

#include <seqan3/core/platform.hpp>

//!\cond
#ifndef SEQAN3_HAS_MM_PAUSE
# if defined(__SSE2__) && __has_include(<xmmintrin.h>)
# include <xmmintrin.h> // _mm_pause()
# define SEQAN3_HAS_MM_PAUSE 1
# else
# define SEQAN3_HAS_MM_PAUSE 0
# endif // defined(__SSE2__) && __has_include(<xmmintrin.h>)
#endif // SEQAN3_HAS_MM_PAUSE
//!\endcond

#include <seqan3/core/platform.hpp>

namespace seqan3::detail
{
/*!\brief A delay for threads waiting for a shared resource.
Expand Down Expand Up @@ -80,16 +82,19 @@ class spin_delay
{
#if SEQAN3_HAS_MM_PAUSE // AMD and Intel
_mm_pause();
#elif defined(__armel__) \
|| defined(__ARMEL__) // arm, but broken? ; repeat of default case as armel also defines __arm__
#elif defined(__armel__) || defined(__ARMEL__) // ARM, but broken? repeat of default case as ARMEL also defines __arm__
asm volatile("nop" ::: "memory"); // default operation - does nothing => Might lead to passive spinning.
#elif defined(__arm__) || defined(__aarch64__) // arm big endian / arm64
#elif defined(__arm__) || defined(__aarch64__) // ARM big endian / ARM64
__asm__ __volatile__("yield" ::: "memory");
#elif defined(__ia64__) // IA64
#elif defined(__ia64__) // IA64
__asm__ __volatile__("hint @pause");
#elif defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) // PowerPC
#elif defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) || defined(__ppc64__) // PowerPC
# if defined(__APPLE__)
__asm__ volatile("or r27,r27,r27" ::: "memory");
# else
__asm__ __volatile__("or 27,27,27" ::: "memory");
#else // everything else.
# endif
#else // everything else
asm volatile("nop" ::: "memory"); // default operation - does nothing => Might lead to passive spinning.
#endif
}
Expand Down