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diff --git a/amforth-6.5/common/lib/forth2012/double/m-star-slash.frt b/amforth-6.5/common/lib/forth2012/double/m-star-slash.frt
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+++ b/amforth-6.5/common/lib/forth2012/double/m-star-slash.frt
@@ -0,0 +1,7 @@
+
+: m*/ ( d1 n2 u3 -- dquot ) \ double m-star-slash
+ >r s>d >r abs rot rot
+ s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
+ swap >r 0 d+ r> rot rot r@ um/mod rot rot r> um/mod
+ nip swap r> if dnegate then
+;