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Diffstat (limited to 'gmp-6.3.0/mpn/x86_64/bd1/README')
| -rw-r--r-- | gmp-6.3.0/mpn/x86_64/bd1/README | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gmp-6.3.0/mpn/x86_64/bd1/README b/gmp-6.3.0/mpn/x86_64/bd1/README new file mode 100644 index 0000000..ccd210e --- /dev/null +++ b/gmp-6.3.0/mpn/x86_64/bd1/README @@ -0,0 +1,11 @@ +This directory contains code for AMD bulldozer including its piledriver update. + +We currently make limited use of SIMD instructions, both via the MPN_PATH and +via inclusion of x86_64/fastsse files. + +The bd1 cores share one SIMD/FPU pipeline for two integer units. This probably +means that an all-core GMP load (such as a HPC load) might run slower if there +is significant SIMD dependency. + +We should perhaps allow a special 'bd1nosimd' pseudo cpu-name excluding any +SIMD code. |