From: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date: Thu, 30 Apr 2015 17:01:34 +0000 (+0000)
Subject: [AArch64] Properly cost FABD pattern
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=19261b995bae88efa98e73cf9cf002aa1a4163ff;p=gcc.git

[AArch64] Properly cost FABD pattern

	* config/aarch64/aarch64.c (aarch64_rtx_costs): Handle pattern for
	fabd in ABS case.

From-SVN: r222638
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a4569bbc075..371078896d8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-04-30  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* config/aarch64/aarch64.c (aarch64_rtx_costs): Handle pattern for
+	fabd in ABS case.
+
 2015-04-30  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/aarch64/aarch64.md
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 7579f5b2519..f1aec673a9a 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -6387,7 +6387,19 @@ cost_plus:
     case ABS:
       if (GET_MODE_CLASS (mode) == MODE_FLOAT)
 	{
-	  /* FABS and FNEG are analogous.  */
+	  op0 = XEXP (x, 0);
+
+	  /* FABD, which is analogous to FADD.  */
+	  if (GET_CODE (op0) == MINUS)
+	    {
+	      *cost += rtx_cost (XEXP (op0, 0), MINUS, 0, speed);
+			+ rtx_cost (XEXP (op0, 1), MINUS, 1, speed);
+	      if (speed)
+		*cost += extra_cost->fp[mode == DFmode].addsub;
+
+	      return true;
+	    }
+	  /* Simple FABS is analogous to FNEG.  */
 	  if (speed)
 	    *cost += extra_cost->fp[mode == DFmode].neg;
 	}