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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2017-01-11 16:38:42 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2017-01-11 16:38:42 +0000 |
| commit | d2471b3168260e0c467672b308a2bb5eda10ff95 (patch) | |
| tree | 41d764d66c719c39a698fd982608534d57c2593f /gcc/opts.c | |
| parent | dbd8471076ba7d89e3c62a6f2fc82cc3abc82a9d (diff) | |
| download | gcc-d2471b3168260e0c467672b308a2bb5eda10ff95.zip gcc-d2471b3168260e0c467672b308a2bb5eda10ff95.tar.gz gcc-d2471b3168260e0c467672b308a2bb5eda10ff95.tar.bz2 | |
My previous change to the Cortex-A53 scheduler resulted in a 13% regression on a proprietary benchmark.
My previous change to the Cortex-A53 scheduler resulted in a 13% regression on a
proprietary benchmark. This turned out to be due to non-optimal scheduling of int
to float conversions. This patch separates int to FP transfers from int to float
conversions based on experiments to determine the best schedule. As a result of
these tweaks the performance of the benchmark improves by 20%.
gcc/
* config/arm/cortex-a53.md: Add bypasses for
cortex_a53_r2f_cvt.
(cortex_a53_r2f): Only use for transfers.
(cortex_a53_f2r): Likewise.
(cortex_a53_r2f_cvt): Add reservation for conversions.
(cortex_a53_f2r_cvt): Likewise.
From-SVN: r244322
Diffstat (limited to 'gcc/opts.c')
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