sparc.c (sparc_absnegfloat_split_legitimate): New function.

	* config/sparc/sparc.c (sparc_absnegfloat_split_legitimate): New
	function.
	* config/sparc/sparc.h: Declare it.
	* config/sparc/sparc.md (float abs/neg splits): Use it.
	(all other splits): Handle SUBREGs properly where necessary.
	(unnamed (1<<x)-1 V8PLUS pattern): Disable for now.

From-SVN: r21981

gcc/ChangeLog

+Tue Aug 25 19:17:59 1998  David S. Miller  <davem@pierdol.cobaltmicro.com>
+
+	* config/sparc/sparc.c (sparc_absnegfloat_split_legitimate): New
+	function.
+	* config/sparc/sparc.h: Declare it.
+	* config/sparc/sparc.md (float abs/neg splits): Use it.
+	(all other splits): Handle SUBREGs properly where necessary.
+	(unnamed (1<<x)-1 V8PLUS pattern): Disable for now.
+
 Tue Aug 25 19:48:46 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* reorg.c (fill_simple_delay_slots): Do not abort if we encounter

gcc/config/sparc/sparc.c

@@ -4743,7 +4743,7 @@ order_regs_for_local_alloc ()
    mem<-->reg splits to be run.  */
 
 int
-sparc_splitdi_legitimate(reg, mem)
+sparc_splitdi_legitimate (reg, mem)
      rtx reg;
      rtx mem;
 {
@@ -4767,6 +4767,27 @@ sparc_splitdi_legitimate(reg, mem)
   return 1;
 }
 
+/* Return 1 if x and y are some kind of REG and they refer to
+   different hard registers.  This test is guarenteed to be
+   run after reload.  */
+
+int
+sparc_absnegfloat_split_legitimate (x, y)
+     rtx x, y;
+{
+  if (GET_CODE (x) == SUBREG)
+    x = alter_subreg (x);
+  if (GET_CODE (x) != REG)
+    return 0;
+  if (GET_CODE (y) == SUBREG)
+    y = alter_subreg (y);
+  if (GET_CODE (y) != REG)
+    return 0;
+  if (REGNO (x) == REGNO (y))
+    return 0;
+  return 1;
+}
+
 /* Return 1 if REGNO (reg1) is even and REGNO (reg1) == REGNO (reg2) - 1.
    This makes them candidates for using ldd and std insns. 
 

gcc/config/sparc/sparc.h

@@ -3243,6 +3243,7 @@ extern void sparc_emit_set_const32 ();
 extern void sparc_emit_set_const64 ();
 extern void sparc_emit_set_symbolic_const64 ();
 extern int sparc_splitdi_legitimate ();
+extern int sparc_absnegfloat_split_legitimate ();
 
 extern char *output_cbranch ();
 extern char *output_return ();