divmodqi.S: Return 0x00 by default for div by 0.

* config/rl78/divmodqi.S: Return 0x00 by default for div by 0.
* config/rl78/divmodsi.S: Update return register to r8.
* config/rl78/divmodhi.S: Update return register to r8,r9.
Branch to main_loop_done_himode to pop registers before return.

From-SVN: r228926

libgcc/ChangeLog

+2015-10-16  Kaushik Phatak  <kaushik.phatak@kpit.com>
+
+	* config/rl78/divmodqi.S: Return 0x00 by default for div by 0.
+	* config/rl78/divmodsi.S: Update return register to r8.
+	* config/rl78/divmodhi.S: Update return register to r8,r9.
+	Branch to main_loop_done_himode to pop registers before return.
+
 2015-10-09  Venkataramanan kumar <venkataramanan.kumar@amd.com>
 
 	* config/i386/cpuinfo.c (get_amd_cpu): Detect bdver4.

libgcc/config/rl78/divmodhi.S

@@ -454,7 +454,11 @@ __generic_himod:
 	movw	ax, den
 	cmpw	ax, #0
 	bnz	$den_not_zero\which
+	.if \need_result
+	movw    quot, #0
+	.else
 	movw	num, #0
+	.endif
 	ret
 
 den_not_zero\which:

libgcc/config/rl78/divmodqi.S

@@ -63,7 +63,7 @@ num_eq_den\which:
 	ret
 	
 den_is_zero\which:
-	mov	r8, #0xff
+	mov	r8, #0x00
 	ret
 
 	;; These routines leave DE alone - the signed functions use DE

libgcc/config/rl78/divmodsi.S

@@ -688,9 +688,14 @@ __generic_simod:
 	or	a, denB3	; not x
 	cmpw	ax, #0
 	bnz	$den_not_zero\which
+	.if \need_result
+	movw	quotL, #0
+	movw	quotH, #0
+	.else
 	movw	numL, #0
 	movw	numH, #0
-	ret
+	.endif
+	br	$!main_loop_done_himode\which
 
 den_not_zero\which:
 	.if \need_result