Let's try this. It's BUGGERED.

src/cmd/tbl/tm.c

@@ -0,0 +1,65 @@
+/* tm.c: split numerical fields */
+# include "t.h"
+
+char	*
+maknew(char *str)
+{
+				/* make two numerical fields */
+	int	dpoint, c;
+	char	*p, *q, *ba;
+
+	p = str;
+	for (ba = 0; c = *str; str++)
+		if (c == '\\' && *(str + 1) == '&')
+			ba = str;
+	str = p;
+	if (ba == 0) {
+		for (dpoint = 0; *str; str++) {
+			if (*str == '.' && !ineqn(str, p) && 
+			    (str > p && digit(*(str - 1)) || 
+			    digit(*(str + 1))))
+				dpoint = (int)str;
+		}
+		if (dpoint == 0)
+			for (; str > p; str--) {
+				if (digit( *(str - 1) ) && !ineqn(str, p))
+					break;
+			}
+		if (!dpoint && p == str) /* not numerical, don't split */
+			return(0);
+		if (dpoint) 
+			str = (char *)dpoint;
+	} else
+		str = ba;
+	p = str;
+	if (exstore == 0 || exstore > exlim) {
+		exstore = exspace = chspace();
+		exlim = exstore + MAXCHS;
+	}
+	q = exstore;
+	while (*exstore++ = *str++)
+		;
+	*p = 0;
+	return(q);
+}
+
+
+int
+ineqn (char *s, char *p)
+{
+				/* true if s is in a eqn within p */
+	int	ineq = 0, c;
+
+	while (c = *p) {
+		if (s == p)
+			return(ineq);
+		p++;
+		if ((ineq == 0) && (c == delim1))
+			ineq = 1;
+		else if ((ineq == 1) && (c == delim2))
+			ineq = 0;
+	}
+	return(0);
+}
+
+