[AArch64] Make aarch64_min_divisions_for_recip_mul configurable

On behalf of Wilco Dijkstra

2015-05-01  Wilco Dijkstra  <wdijkstr@arm.com>

	* gcc/config/aarch64/aarch64-protos.h (tune_params):
	Add min_div_recip_mul_sf and min_div_recip_mul_df fields.
	* gcc/config/aarch64/aarch64.c (aarch64_min_divisions_for_recip_mul):
	Return value depending on target.
	(generic_tunings): Initialize new target settings.
	(cortexa53_tunings): Likewise.
	(cortexa57_tunings): Likewise.
	(thunderx_tunings): Likewise.
	(xgene1_tunings): Likewise.

From-SVN: r222679

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9869d0a2e7fce5fe6532f762363e4d0afb20c225..223eb8b821e0b13e6cbb34b3273b7c00070e31c4 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2015-05-01  Wilco Dijkstra  <wdijkstr@arm.com>
+
+       * gcc/config/aarch64/aarch64-protos.h (tune_params):
+       Add min_div_recip_mul_sf and min_div_recip_mul_df fields.
+       * gcc/config/aarch64/aarch64.c (aarch64_min_divisions_for_recip_mul):
+       Return value depending on target.
+       (generic_tunings): Initialize new target settings.
+       (cortexa53_tunings): Likewise.
+       (cortexa57_tunings): Likewise.
+       (thunderx_tunings): Likewise.
+       (xgene1_tunings): Likewise.
+
 2015-05-01  Wilco Dijkstra  <wdijkstr@arm.com>
 
        * gcc/config/arm/aarch-cost-tables.h (cortexa53_extra_costs):

diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index 8676c5c9c85d82f05e8c63e27f29d1e244ac7104..08ce5f1eb1629100844a9ce16769e3e286866904 100644 (file)
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -177,6 +177,8 @@ struct tune_params
   const int int_reassoc_width;
   const int fp_reassoc_width;
   const int vec_reassoc_width;
+  const int min_div_recip_mul_sf;
+  const int min_div_recip_mul_df;
 };
 
 HOST_WIDE_INT aarch64_initial_elimination_offset (unsigned, unsigned);

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 94bdac7140d704402f114c724c8c97b261a3e939..374b0a951cf1584f613a5613a239c73849ce3813 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -354,7 +354,9 @@ static const struct tune_params generic_tunings =
   4,   /* loop_align.  */
   2,   /* int_reassoc_width.  */
   4,   /* fp_reassoc_width.  */
-  1    /* vec_reassoc_width.  */
+  1,   /* vec_reassoc_width.  */
+  2,   /* min_div_recip_mul_sf.  */
+  2    /* min_div_recip_mul_df.  */
 };
 
 static const struct tune_params cortexa53_tunings =
@@ -372,7 +374,9 @@ static const struct tune_params cortexa53_tunings =
   4,   /* loop_align.  */
   2,   /* int_reassoc_width.  */
   4,   /* fp_reassoc_width.  */
-  1    /* vec_reassoc_width.  */
+  1,   /* vec_reassoc_width.  */
+  2,   /* min_div_recip_mul_sf.  */
+  2    /* min_div_recip_mul_df.  */
 };
 
 static const struct tune_params cortexa57_tunings =
@@ -390,7 +394,9 @@ static const struct tune_params cortexa57_tunings =
   4,   /* loop_align.  */
   2,   /* int_reassoc_width.  */
   4,   /* fp_reassoc_width.  */
-  1    /* vec_reassoc_width.  */
+  1,   /* vec_reassoc_width.  */
+  2,   /* min_div_recip_mul_sf.  */
+  2    /* min_div_recip_mul_df.  */
 };
 
 static const struct tune_params thunderx_tunings =
@@ -407,7 +413,9 @@ static const struct tune_params thunderx_tunings =
   8,   /* loop_align.  */
   2,   /* int_reassoc_width.  */
   4,   /* fp_reassoc_width.  */
-  1    /* vec_reassoc_width.  */
+  1,   /* vec_reassoc_width.  */
+  2,   /* min_div_recip_mul_sf.  */
+  2    /* min_div_recip_mul_df.  */
 };
 
 static const struct tune_params xgene1_tunings =
@@ -424,7 +432,9 @@ static const struct tune_params xgene1_tunings =
   16,  /* loop_align.  */
   2,   /* int_reassoc_width.  */
   4,   /* fp_reassoc_width.  */
-  1    /* vec_reassoc_width.  */
+  1,   /* vec_reassoc_width.  */
+  2,   /* min_div_recip_mul_sf.  */
+  2    /* min_div_recip_mul_df.  */
 };
 
 /* A processor implementing AArch64.  */
@@ -513,9 +523,11 @@ static const char * const aarch64_condition_codes[] =
 };
 
 static unsigned int
-aarch64_min_divisions_for_recip_mul (enum machine_mode mode ATTRIBUTE_UNUSED)
+aarch64_min_divisions_for_recip_mul (enum machine_mode mode)
 {
-  return 2;
+  if (GET_MODE_UNIT_SIZE (mode) == 4)
+    return aarch64_tune_params->min_div_recip_mul_sf;
+  return aarch64_tune_params->min_div_recip_mul_df;
 }
 
 static int