s390.c (s390_register_info): Don't save fprs for -msoft-float.

2004-10-08  Andreas Krebbel  <krebbel1@de.ibm.com>

	* config/s390/s390.c (s390_register_info): Don't save fprs for
	-msoft-float.
	(s390_conditional_register_usage): Make fprs 'fixed' for -msoft-float.

From-SVN: r88764

gcc/ChangeLog

+2004-10-08  Andreas Krebbel  <krebbel1@de.ibm.com>
+
+	* config/s390/s390.c (s390_register_info): Don't save fprs for 
+	-msoft-float.
+	(s390_conditional_register_usage): Make fprs 'fixed' for -msoft-float.
+
 2004-10-08  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* config/s390/s390.h (TARGET_DEFAULT_BACKCHAIN): New define.

gcc/config/s390/s390.c

@@ -6219,6 +6219,7 @@ s390_register_info (int live_regs[])
         cfun_frame_layout.last_save_gpr = 6;
 
       /* Mark f0, f2 for 31 bit and f0-f4 for 64 bit to be saved.  */
+      if (TARGET_HARD_FLOAT)
 	for (i = 0; i < (TARGET_64BIT ? 4 : 2); i++)
 	  cfun_set_fpr_bit (i);
     }
@@ -8403,6 +8404,12 @@ s390_conditional_register_usage (void)
       for (i = 18; i < 20; i++)
 	call_used_regs[i] = call_really_used_regs[i] = 0;
     }
+
+  if (TARGET_SOFT_FLOAT)
+    {
+      for (i = 16; i < 32; i++)
+	call_used_regs[i] = fixed_regs[i] = 1;
+    }
 }
 
 /* Corresponding function to eh_return expander.  */