__pldx and __pld if ACLE is available (every ARM compiler I'm aware of except MSVC, including ARM's)
_mm_prefetch for SSE
__prefetch for VS targeting ARM, __prefetch2 on VS for ARM64
sun_prefetch_{read,write)_{once,many} for Oracle Developer Studio
__prefetch_by_load on XL C/C++
#pragma _CRI prefetch ... on Cray
#pragma prefetch on PGI
The reason it's not in Hedley right now is that some of the headers we would have to include (xmmintrin.h for SSE, arm_acle.h for ACLE… sun_prefetch.h for ODS isn't really a big deal) are pretty heavy and I'm not sure about the idea of pulling them in unconditionally for a macro I'm not even sure is all that useful.
If anyone has an opinion on including the macro in Hedley I'd be interested, especially if someone wants to do some testing on non-x86 since I have a feeling prefetching may be more important there.
I added a
HEDLEYX_PREFETCHmacro in the experiments branch.__builtin_prefetchfor GCC/clang/ICC__pldxand__pldif ACLE is available (every ARM compiler I'm aware of except MSVC, including ARM's)_mm_prefetchfor SSE__prefetchfor VS targeting ARM,__prefetch2on VS for ARM64sun_prefetch_{read,write)_{once,many}for Oracle Developer Studio__prefetch_by_loadon XL C/C++#pragma _CRI prefetch ...on Cray#pragma prefetchon PGIThe reason it's not in Hedley right now is that some of the headers we would have to include (xmmintrin.h for SSE, arm_acle.h for ACLE… sun_prefetch.h for ODS isn't really a big deal) are pretty heavy and I'm not sure about the idea of pulling them in unconditionally for a macro I'm not even sure is all that useful.
If anyone has an opinion on including the macro in Hedley I'd be interested, especially if someone wants to do some testing on non-x86 since I have a feeling prefetching may be more important there.