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| author | James Greenhalgh <james.greenhalgh@arm.com> | 2014-05-16 09:12:14 +0000 |
|---|---|---|
| committer | James Greenhalgh <jgreenhalgh@gcc.gnu.org> | 2014-05-16 09:12:14 +0000 |
| commit | 4105fe38857a36b4e604d98a7bbc888225bf187f (patch) | |
| tree | 8d344696e1459777ac94badc88062c0fc5c793bf /gcc/config/aarch64 | |
| parent | 7cc2145f544f4ef8cbb0b74a789712ad88d5e638 (diff) | |
| download | gcc-4105fe38857a36b4e604d98a7bbc888225bf187f.zip gcc-4105fe38857a36b4e604d98a7bbc888225bf187f.tar.gz gcc-4105fe38857a36b4e604d98a7bbc888225bf187f.tar.bz2 | |
[AArch64 costs 13/18] Improve costs for div/mod
gcc/
* config/aarch64/aarch64.c (aarch64_rtx_costs): Improve costs for
DIV/MOD.
Co-Authored-By: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
From-SVN: r210505
Diffstat (limited to 'gcc/config/aarch64')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 37c791d..6c2682a 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5476,7 +5476,6 @@ cost_minus: case MOD: case UMOD: - *cost = COSTS_N_INSNS (2); if (speed) { if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT) @@ -5493,15 +5492,15 @@ cost_minus: case DIV: case UDIV: - *cost = COSTS_N_INSNS (1); + case SQRT: if (speed) { - if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT) - *cost += extra_cost->mult[GET_MODE (x) == DImode].idiv; - else if (GET_MODE (x) == DFmode) - *cost += extra_cost->fp[1].div; - else if (GET_MODE (x) == SFmode) - *cost += extra_cost->fp[0].div; + if (GET_MODE_CLASS (mode) == MODE_INT) + /* There is no integer SQRT, so only DIV and UDIV can get + here. */ + *cost += extra_cost->mult[mode == DImode].idiv; + else + *cost += extra_cost->fp[mode == DFmode].div; } return false; /* All arguments need to be in registers. */ |