Moved tools

2022-09-07 13:11:36 +02:00
parent d3beeb0538
commit ddabf14706
24 changed files with 0 additions and 0 deletions
@@ -0,0 +1,42 @@
+; -------------------------------------------------
+; mul8x8.inc.jsm
+; -------------------------------------------------
+
+; -------------------------------------------------
+; Parameter:
+; R0 : operand 1
+; R1 : operand 2
+; Return:
+; R0 : product low
+; R1 : product high
+mul8x8:			push	R2
+				push	R3
+				push	R4
+				
+				mov		R4, R1
+				mov		R1, 0
+				mov		R2, 0
+				mov		R3, 0
+				
+loop1:			cmp		R4, 0x01
+				jeq		ende1
+
+				shr		R4
+				jnc		next1
+
+				add		R2, R0
+				addc	R3, R1
+
+next1:			shl		R0
+				rolc	R1
+				jmp		loop1
+				
+ende1:			add		R0, R2
+				addc	R1, R3
+				
+				pop		R4
+				pop		R3
+				pop		R2
+				ret
+
+; -------------------------------------------------