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https://stackoverflow.com/questions/28939652/how-to-detect-sse-sse2-avx-avx2-avx-512-avx-128-fma-kcvi-availability-at-compile
More recent Intel processors support AVX-512, which is not a monolithic instruction set. One can see the support available from GCC (version 6.2) for two examples below. Here is Knights Landing:
https://gcc.gnu.org/wiki/cauldron2014?action=AttachFile&do=get&target=Cauldron14_AVX-512_Vector_ISA_Kirill_Yukhin_20140711.pdf
Intel® Advanced Vector Extensions 2015/2016 Support in GNU Compiler Collection GNU Tools Cauldron 2014 Presented by Kirill Yukhin of Intel, July 2014 ... •State-of-the-art SIMD support: AVX-512 F + CDI + AVX-512 {VL, DQ, BW} •Best balance of performance for any workload
https://en.wikipedia.org/wiki/Advanced_Vector_Extensions
Advanced Vector Extensions (AVX, also known as Sandy Bridge New Extensions) ... Compiler and assembler support. GCC starting with version 4.6 (although there was a 4.3 branch with certain support) and the Intel Compiler Suite starting with version 11.1 support AVX.
https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html
GCC depresses SSEx instructions when -mavx is used. Instead, it generates new AVX instructions or AVX equivalence for all SSEx instructions when needed. These options enable GCC to use these extended instructions in generated code, even without -mfpmath=sse. Applications that perform run-time CPU detection must compile separate files for each ...
https://www.phoronix.com/scan.php?page=article&item=intel_avx_gcc&num=1
The core2 GCC option is designed for CPUs with just MMX, SSE, SSE2, and SSE3 instruction set support. The corei7 vanilla option adds in SSE4.1 and SSE4.2 AVX support to the mix while the corei7-avx option obviously adds in the AVX instruction set support plus AES and PCLMUL ISA support.
https://software.intel.com/en-us/forums/intel-c-compiler/topic/393495
support of gcc vector extensions required. support of gcc vector extensions required ... I have a code thtat uses gcc vector extensions and achieves 80% of the nominal peak performance with avx vectors. The gcc vector extensions allow me to write explictely vectorize code, with only very few intrisics (sum, products and the like are all simply ...
https://sourceforge.net/p/mingw-w64/discussion/723797/thread/bc936130/
Jan 28, 2019 · GCC on windows does not support the ABI for AVX. is almost completelly wrong. There is nothing that prevent GCC to produce good AVX code besides only one single bug in GCC compiler, and in particular: GCC doesn't properly align the temporal variable used to pass vector value to function.
https://www.phoronix.com/scan.php?page=news_item&px=MTU5OTE
AVX-512 also has a new EVEX coding scheme over AVX1/AVX2. The AVX-512 support that's been added to GCC this month is the inline assembly support, support for AVX-512's new registers and extending the existing registers, the intrinsics set, and basic auto-vectorization support.
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