From 4ced8363622b31910cda61796a28fe2cbf70faa7 Mon Sep 17 00:00:00 2001 From: Di Zhao OS Date: Thu, 22 Jun 2023 15:16:57 +0100 Subject: 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. --- gcc/config/aarch64/aarch64.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'gcc') diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc index b99f12c..644ebde 100644 --- a/gcc/config/aarch64/aarch64.cc +++ b/gcc/config/aarch64/aarch64.cc @@ -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. */ -- cgit v1.1