| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | x86: Unifies 'strlen-evex' and 'strlen-evex512' implementations. | Matthew Sterrett | 2023-12-18 | 1 | -1/+5 |
| | | | | | | | | | | | | | | | | | | | | | | | This commit uses a common implementation 'strlen-evex-base.S' for both 'strlen-evex' and 'strlen-evex512' The motivation is to reduce the number of implementations to maintain. This incidentally gives a small performance improvement. All tests pass on x86. Benchmarks were taken on SKX. https://www.intel.com/content/www/us/en/products/sku/123613/intel-core-i97900x-xseries-processor-13-75m-cache-up-to-4-30-ghz/specifications.html Geometric mean for strlen-evex512 over all benchmarks (N=10) was (new/old) 0.939 Geometric mean for wcslen-evex512 over all benchmarks (N=10) was (new/old) 0.965 Code Size Changes: strlen-evex512.S : +24 bytes wcslen-evex512.S : +54 bytes Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com> | ||||
| * | x86_64: Implement evex512 version of strlen, strnlen, wcslen and wcsnlen | Sunil K Pandey | 2022-05-26 | 1 | -0/+4 |
| This patch implements following evex512 version of string functions. Perf gain for evex512 version is up to 50% as compared to evex, depending on length and alignment. Placeholder function, not used by any processor at the moment. - String length function using 512 bit vectors. - String N length using 512 bit vectors. - Wide string length using 512 bit vectors. - Wide string N length using 512 bit vectors. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com> | |||||
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