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      1 This directory contains code for AMD bulldozer including its piledriver update.
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      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.
     12