rs6000.c (rs6000_rtx_costs): Make adjustment for MULT inside MINUS as either argument.

	* config/rs6000/rs6000.c (rs6000_rtx_costs): Make adjustment for
	MULT inside MINUS as either argument.  Use rs6000_cost->dmul -
	rs6000_cost->fp not 0 as adjustment for outer NEG.

From-SVN: r120442

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 602f2e7e328ac78bc3ab07415955fe3c1d21c99d..c6b21eb1b69f480a0e960447c36c4fed9f9fe4d9 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-01-04  Joseph Myers  <joseph@codesourcery.com>
+
+       * config/rs6000/rs6000.c (rs6000_rtx_costs): Make adjustment for
+       MULT inside MINUS as either argument.  Use rs6000_cost->dmul -
+       rs6000_cost->fp not 0 as adjustment for outer NEG.
+
 2007-01-04  Jan Hubicka  <jh@suse.cz>
 
        * cgraph.c (cgraph_release_function_body): New function.

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 15f263ab01660303c722bacc56193b1e922832ff..7ef7551764f5f2ebd4e507b93158f546c51b0964 100644 (file)
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -19738,11 +19738,12 @@ rs6000_rtx_costs (rtx x, int code, int outer_code, int *total)
     case MINUS:
       if (mode == DFmode)
        {
-         if (GET_CODE (XEXP (x, 0)) == MULT)
+         if (GET_CODE (XEXP (x, 0)) == MULT
+             || GET_CODE (XEXP (x, 1)) == MULT)
            {
              /* FNMA accounted in outer NEG.  */
              if (outer_code == NEG)
-               *total = 0;
+               *total = rs6000_cost->dmul - rs6000_cost->fp;
              else
                *total = rs6000_cost->dmul;
            }