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Diffstat (limited to 'results/scraper/fex/4213')
| -rw-r--r-- | results/scraper/fex/4213 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/results/scraper/fex/4213 b/results/scraper/fex/4213 new file mode 100644 index 000000000..41b07b8a9 --- /dev/null +++ b/results/scraper/fex/4213 @@ -0,0 +1,6 @@ +{v,}ptest can be made more efficient with SVE +{v,}ptest is a bit of a weird family of instructions because it sets ZF and CF depending on if the full mask, or negated mask is all zeroes respectively. This is a bit of a faff with ASIMD since it doesn't match semantically, and AVX just adds even more instructions to it. + +With SVE they added the new `CMP<cc>` instructions which set both a predicate register and the NZCV flags. This can reduce the number of instructions that {v,}ptest requires by quite a bit. + +Likely worth implementing. \ No newline at end of file |