lb1sf68.S (Laddsf$nf): Fix sign bit handling in path to Lf$finfty.

2018-05-23  Kalamatee  <kalamatee@gmail.com>

	* config/m68k/lb1sf68.S (Laddsf$nf): Fix sign bit handling in
	path to Lf$finfty.

From-SVN: r260626

libgcc/ChangeLog

+2018-05-23  Kalamatee  <kalamatee@gmail.com>
+
+	* config/m68k/lb1sf68.S (Laddsf$nf): Fix sign bit handling in
+	path to Lf$finfty.
+
 2018-05-18  Kito Cheng <kito.cheng@gmail.com>
 	    Monk Chiang  <sh.chiang04@gmail.com>
 	    Jim Wilson <jimw@sifive.com>

libgcc/config/m68k/lb1sf68.S

@@ -3111,6 +3111,8 @@ Laddsf$nf:
 	movel	a6@(12),d1	| did some processing already)
 	movel	IMM (INFINITY),d4 | useful constant (INFINITY)
 	movel	d0,d2		| save sign bits
+	movel	d0,d7		| into d7 as well as we may need the sign
+				| bit before jumping to LfSinfty
 	movel	d1,d3
 	bclr	IMM (31),d0	| clear sign bits
 	bclr	IMM (31),d1
@@ -3125,7 +3127,6 @@ Laddsf$nf:
 | are adding or subtracting them.
 	eorl	d3,d2		| to check sign bits
 	bmi	1f
-	movel	d0,d7
 	andl	IMM (0x80000000),d7	| get (common) sign bit
 	bra	Lf$infty
 1:
@@ -3135,7 +3136,6 @@ Laddsf$nf:
 	cmpl	d1,d0		| are both infinite?
 	beq	Lf$inop		| if so return NaN
 
-	movel	d0,d7
 	andl	IMM (0x80000000),d7 | get a's sign bit '
 	cmpl	d4,d0		| test now for infinity
 	beq	Lf$infty	| if a is INFINITY return with this sign