Index: gcc/config/rl78/rl78.md
===================================================================
--- gcc/config/rl78/rl78.md	(revision 194833)
+++ gcc/config/rl78/rl78.md	(working copy)
@@ -273,10 +273,10 @@
   )
 
 ;; 0xFFFF0 is MDAL.  0xFFFF2 is MDAH.
-;; 0xFFFF4 is MDBL.  0xFFFF6 is MDBH.
+;; 0xFFFF6 is MDBL.  0xFFFF4 is MDBH.
 ;; 0xF00E0 is MDCL.  0xF00E2 is MDCH.
 ;; 0xF00E8 is MDUC.
-;; Warning: this matches the documentation, not the silicon.
+;; Warning: this matches the silicon not the documentation.
 (define_insn "mulsi3_g13"
   [(set (match_operand:SI          0 "register_operand" "=&v")
 	(mult:SI (match_operand:SI 1 "nonmemory_operand" "vi")
@@ -291,12 +291,12 @@
 	movw	ax, %h2
 	movw	0xffff2, ax	; MDAH
 	nop	; mdb = mdal * mdah
-	movw	ax, 0xffff4	; MDBL
+	movw	ax, 0xffff6	; MDBL
 	movw	%h0, ax
 
 	mov	a, #0x40
 	mov	!0xf00e8, a	; MDUC
-	movw	ax, 0xffff6	; MDBH
+	movw	ax, 0xffff4	; MDBH
 	movw	!0xf00e0, ax	; MDCL
 	movw	ax, #0
 	movw	!0xf00e2, ax	; MDCL