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libsrc/runtime/ldiv.s

@@ -0,0 +1,20 @@
+;
+; Ullrich von Bassewitz, 17.08.1998
+;
+; CC65 runtime: division for signed long ints
+;
+
+; When negating values, we will ignore the possibility here, that one of the
+; values if $80000000, in which case the negate will fail.
+
+       	.export		tosdiveax
+	.import		poplsargs, udiv32, adjlsres
+	.importzp	ptr1
+
+tosdiveax:
+       	jsr	poplsargs  	; Get arguments from stack, adjust sign
+       	jsr    	udiv32 		; Do the division
+   	lda	ptr1		; Result is in (ptr1:sreg)
+   	ldx	ptr1+1
+	jmp	adjlsres    	; Adjust the sign of the result if needed
+