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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@248953 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 6 insertions, 8 deletions

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 5707e5317e2..bce490ff555 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -7544,17 +7544,13 @@ cost_plus:
     case UMOD:
       if (speed)
 	{
+	  /* Slighly prefer UMOD over SMOD.  */
 	  if (VECTOR_MODE_P (mode))
 	    *cost += extra_cost->vect.alu;
 	  else if (GET_MODE_CLASS (mode) == MODE_INT)
 	    *cost += (extra_cost->mult[mode == DImode].add
-		      + extra_cost->mult[mode == DImode].idiv);
-	  else if (mode == DFmode)
-	    *cost += (extra_cost->fp[1].mult
-		      + extra_cost->fp[1].div);
-	  else if (mode == SFmode)
-	    *cost += (extra_cost->fp[0].mult
-		      + extra_cost->fp[0].div);
+		      + extra_cost->mult[mode == DImode].idiv
+		      + (code == MOD ? 1 : 0));
 	}
       return false;  /* All arguments need to be in registers.  */
 
@@ -7568,7 +7564,9 @@ cost_plus:
 	  else 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;
+	    *cost += (extra_cost->mult[mode == DImode].idiv
+		     /* Slighly prefer UDIV over SDIV.  */
+		     + (code == DIV ? 1 : 0));
 	  else
 	    *cost += extra_cost->fp[mode == DFmode].div;
 	}