Age | Commit message (Collapse) | Author | |
---|---|---|---|
2017-01-01 | Update copyright dates with scripts/update-copyrights. | Joseph Myers | |
2016-01-04 | Update copyright dates with scripts/update-copyrights. | Joseph Myers | |
2015-01-13 | powerpc: Optimized st{r,p}cpy for POWER8/PPC64 | Adhemerval Zanella | |
This patch adds an optimized POWER8 strcpy using unaligned accesses. For strings up to 16 bytes the implementation first calculate the string size, like strlen, and issues a memcpy. For larger strings, source is first aligned to 16 bytes and then tested over a loop that reads 16 bytes am combine the cmpb results for speedup. Special case is added for page cross reads. It shows 30%-60% improvement over the optimized POWER7 one that uses only aligned accesses. |