Initial revision

mach/proto/fp/cmf4.c

@@ -0,0 +1,30 @@
+/*
+	COMPARE	DOUBLES
+*/
+
+#include	"FP_types.h"
+#include	"get_put.h"
+
+short
+cmf4(f1,f2)
+_float	f1,f2;
+{
+		/*
+		 * return ((f1 < f2) ? 1 : (f1 - f2))
+		 */
+#define SIGN(x) (((x) < 0) ? -1 : 1)
+        int	sign1,sign2;
+	long	l1,l2;
+
+	l1 = get4((char *) &f1);
+	l2 = get4((char *) &f2);
+
+	if (l1 == l2) return 0;
+
+        sign1 = SIGN(l1);
+        sign2 = SIGN(l2);
+        if (sign1 != sign2)
+                return ((sign1 > 0) ? -1 : 1);
+
+	return (sign1 * ((l1 < l2) ? 1 : -1));
+}