s390.c (s390_option_override): Make -mhard-dfp the default if possible and not specif...

2012-02-21  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	* config/s390/s390.c (s390_option_override): Make -mhard-dfp the
	default if possible and not specified otherwise.

From-SVN: r184439

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 489befa393f3c11df8b653cce1c7c98b985cec85..0ad9eb23945a2de101284244119ee87651ca9a3c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-02-21  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
+
+       * config/s390/s390.c (s390_option_override): Make -mhard-dfp the
+       default if possible and not specified otherwise.
+
 2012-02-21  Richard Guenther  <rguenther@suse.de>
 
        PR middle-end/52314

diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 824308addc6a06ae24928ade946e9d3b5dde6393..d6e250fd5a8f332a06eeb15e2b973282e0809d42 100644 (file)
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -1540,6 +1540,11 @@ s390_option_override (void)
   if (TARGET_64BIT && !TARGET_ZARCH)
     error ("64-bit ABI not supported in ESA/390 mode");
 
+  /* Use hardware DFP if available and not explicitly disabled by
+     user. E.g. with -m31 -march=z10 -mzarch   */
+  if (!(target_flags_explicit & MASK_HARD_DFP) && TARGET_DFP)
+    target_flags |= MASK_HARD_DFP;
+
   if (TARGET_HARD_DFP && !TARGET_DFP)
     {
       if (target_flags_explicit & MASK_HARD_DFP)