* [PATCH][AArch64] Add TARGET_MIN_DIVISIONS_FOR_RECIP_MUL
@ 2014-12-12 15:19 Wilco Dijkstra
2014-12-16 10:37 ` Marcus Shawcroft
0 siblings, 1 reply; 2+ messages in thread
From: Wilco Dijkstra @ 2014-12-12 15:19 UTC (permalink / raw)
To: gcc-patches
Add an override for TARGET_MIN_DIVISIONS_FOR_RECIP_MUL and set the minimum number of divisions to 2.
This gives ~0.5% speedup on SPECFP2000/2006.
OK for trunk?
ChangeLog:
2014-12-13 Wilco Dijkstra wdijkstr@arm.com
* gcc/config/aarch64/aarch64.c (TARGET_MIN_DIVISIONS_FOR_RECIP_MUL):
Define. (aarch64_min_divisions_for_recip_mul): New function.
---
gcc/config/aarch64/aarch64.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index f2d390b..8c23064 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -462,6 +462,12 @@ static const char * const aarch64_condition_codes[] =
"hi", "ls", "ge", "lt", "gt", "le", "al", "nv"
};
+static unsigned int
+aarch64_min_divisions_for_recip_mul (enum machine_mode mode ATTRIBUTE_UNUSED)
+{
+ return 2;
+}
+
static int
aarch64_reassociation_width (unsigned opc ATTRIBUTE_UNUSED,
enum machine_mode mode)
@@ -11026,6 +11032,9 @@ aarch64_gen_adjusted_ldpstp (rtx *operands, bool load,
#undef TARGET_MEMORY_MOVE_COST
#define TARGET_MEMORY_MOVE_COST aarch64_memory_move_cost
+#undef TARGET_MIN_DIVISIONS_FOR_RECIP_MUL
+#define TARGET_MIN_DIVISIONS_FOR_RECIP_MUL aarch64_min_divisions_for_recip_mul
+
#undef TARGET_MUST_PASS_IN_STACK
#define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
--
1.9.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH][AArch64] Add TARGET_MIN_DIVISIONS_FOR_RECIP_MUL
2014-12-12 15:19 [PATCH][AArch64] Add TARGET_MIN_DIVISIONS_FOR_RECIP_MUL Wilco Dijkstra
@ 2014-12-16 10:37 ` Marcus Shawcroft
0 siblings, 0 replies; 2+ messages in thread
From: Marcus Shawcroft @ 2014-12-16 10:37 UTC (permalink / raw)
To: Wilco Dijkstra; +Cc: gcc-patches
On 12 December 2014 at 15:19, Wilco Dijkstra <wdijkstr@arm.com> wrote:
> Add an override for TARGET_MIN_DIVISIONS_FOR_RECIP_MUL and set the minimum number of divisions to 2.
> This gives ~0.5% speedup on SPECFP2000/2006.
>
> OK for trunk?
>
> ChangeLog:
> 2014-12-13 Wilco Dijkstra wdijkstr@arm.com
>
> * gcc/config/aarch64/aarch64.c (TARGET_MIN_DIVISIONS_FOR_RECIP_MUL):
> Define. (aarch64_min_divisions_for_recip_mul): New function.
Ok /Marcus
^ permalink raw reply [flat|nested] 2+ messages in thread
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