github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/x86_64/bd1/README (about)

     1  This directory contains code for AMD bulldozer including its piledriver update.
     2  
     3  We currently make limited use of SIMD instructions, both via the MPN_PATH and
     4  via inclusion of x86_64/fastsse files.
     5  
     6  The bd1 cores share one SIMD/FPU pipeline for two integer units.  This probably
     7  means that an all-core GMP load (such as a HPC load) might run slower if there
     8  is significant SIMD dependency.
     9  
    10  We should perhaps allow a special 'bd1nosimd' pseudo cpu-name excluding any
    11  SIMD code.