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| author | Yvan Roux <yvan.roux@linaro.org> | 2017-07-05 09:17:02 +0200 |
|---|---|---|
| committer | Yvan Roux <yvan.roux@linaro.org> | 2017-07-05 13:33:00 +0000 |
| commit | ed3800bb37f706a0d308230e100106ae50c2bad9 (patch) | |
| tree | 443ebf04138dd7e6a33f1ddb23a5434ce3b53d18 /gcc/config/arm | |
| parent | f83d498336b6609abc5606f7763fdfb4fb19c720 (diff) | |
| download | gcc-ed3800bb37f706a0d308230e100106ae50c2bad9.tar.gz | |
gcc/
Backport from trunk r248953.
2017-06-07 Tamar Christina <tamar.christina@arm.com>
* config/aarch64/aarch64.c (aarch64_rtx_costs): Make sdiv more expensive than udiv.
Remove floating point cases from mod.
gcc/testsuite/
Backport from trunk r248953.
2017-06-07 Tamar Christina <tamar.christina@arm.com>
* gcc.target/aarch64/sdiv_costs_1.c: New.
gcc/
Backport from trunk r249062.
2017-06-09 Tamar Christina <tamar.christina@arm.com>
* config/arm/arm.c (arm_rtx_costs_internal): Make sdiv more expensive than udiv.
gcc/testsuite/
Backport from trunk r249062.
2017-06-09 Tamar Christina <tamar.christina@arm.com>
* gcc.target/arm/sdiv_costs_1.c: New.
Change-Id: I503544ca95e8fc28ab9bb9b0060ea90fe557d2e6
Diffstat (limited to 'gcc/config/arm')
| -rw-r--r-- | gcc/config/arm/arm.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 0815a46351a..692641120be 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -9315,6 +9315,10 @@ arm_rtx_costs_internal (rtx x, enum rtx_code code, enum rtx_code outer_code, *cost += COSTS_N_INSNS (speed_p ? extra_cost->mult[0].idiv : 0); else *cost = LIBCALL_COST (2); + + /* Make the cost of sdiv more expensive so when both sdiv and udiv are + possible udiv is prefered. */ + *cost += (code == DIV ? COSTS_N_INSNS (1) : 0); return false; /* All arguments must be in registers. */ case MOD: @@ -9337,7 +9341,9 @@ arm_rtx_costs_internal (rtx x, enum rtx_code code, enum rtx_code outer_code, /* Fall-through. */ case UMOD: - *cost = LIBCALL_COST (2); + /* Make the cost of sdiv more expensive so when both sdiv and udiv are + possible udiv is prefered. */ + *cost = LIBCALL_COST (2) + (code == MOD ? COSTS_N_INSNS (1) : 0); return false; /* All arguments must be in registers. */ case ROTATE: |