From: tege <tege@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 6 Feb 1995 21:51:57 +0000 (+0000)
Subject: (RTX_COSTS): Rewrite.
X-Git-Url: http://git.sourceforge.jp/view?a=commitdiff_plain;h=7b228ca16f7f42610adff4b34c841c3105a168e5;p=pf3gnuchains%2Fgcc-fork.git

(RTX_COSTS): Rewrite.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@8878 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index a5623a7d87d..9fc65dde295 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -1388,18 +1388,27 @@ while (0)
 /* Provide the costs of a rtl expression.  This is in the body of a
    switch on CODE. */
 
-#define RTX_COSTS(X,CODE,OUTER_CODE)			\
-  case MULT:						\
-    return COSTS_N_INSNS (10);				\
-  case DIV:						\
-  case UDIV:						\
-  case MOD:						\
-  case UMOD:						\
-    return COSTS_N_INSNS (40);				\
-  case PLUS:						\
-    if (GET_CODE (XEXP (X, 0)) == REG			\
-        && GET_CODE (XEXP (X, 1)) == CONST_INT)		\
-      return 1;						\
+#define RTX_COSTS(X,CODE,OUTER_CODE)				\
+  case MULT:							\
+    return COSTS_N_INSNS (20);					\
+  case DIV:							\
+  case UDIV:							\
+  case MOD:							\
+  case UMOD:							\
+    return COSTS_N_INSNS (20);					\
+  case ASHIFTRT:						\
+  case LSHIFTRT:						\
+  case ASHIFT:							\
+    return (4 + rtx_cost (XEXP (X, 0), OUTER_CODE)		\
+	    + rtx_cost (XEXP (X, 1), OUTER_CODE));		\
+  case PLUS:							\
+    if (GET_CODE (XEXP (X, 0)) == MULT				\
+	&& GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT	\
+	&& (INTVAL (XEXP (XEXP (X, 0), 1)) == 2			\
+	    || INTVAL (XEXP (XEXP (X, 0), 1)) == 4		\
+	    || INTVAL (XEXP (XEXP (X, 0), 1)) == 8))		\
+      return (2 + rtx_cost (XEXP (XEXP (X, 0), 0), OUTER_CODE)	\
+	      + rtx_cost (XEXP (X, 1), OUTER_CODE));		\
     break;