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Change fma_reassoc_width tuning for ampere1 

This patch enables reassociation of floating-point additions on ampere1.
This brings about 1% overall benefit on spec2017 fprate cases. (There
are minor regressions in 510.parest_r and 508.namd_r, analyzed here:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110279 .)

gcc/ChangeLog:

	* config/aarch64/aarch64.cc: Change fma_reassoc_width for ampere1.
This commit is contained in:
Di Zhao OS 2023-06-22 15:16:57 +01:00 committed by Richard Sandiford
parent 2cd0689a79
commit 4ced836362
1 changed files with 1 additions and 1 deletions
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2
gcc/config/aarch64/aarch64.cc
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@ -1929,7 +1929,7 @@ static const struct tune_params ampere1_tunings =
"32:16", /* loop_align. */
2, /* int_reassoc_width. */
4, /* fp_reassoc_width. */
1, /* fma_reassoc_width. */
4, /* fma_reassoc_width. */
2, /* vec_reassoc_width. */
2, /* min_div_recip_mul_sf. */
2, /* min_div_recip_mul_df. */