--- /usr/src/avr-libc-1.2.0/libm/fplib/divsf3x.S	2004-11-10 17:04:46.000000000 -0400
+++ divsf3x.S	2005-01-08 17:46:29.184876459 -0400
@@ -6,7 +6,6 @@
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:
-
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    
@@ -53,9 +52,19 @@
           FUNCTION(__divsf3x)
 
 GLOBAL(__divsf3x)
-    TST     rB3
+
+    ;Check if fractional part of B is zero, do this by
+    ;ORing zero with the three fraction part registers. If the result
+    ;is still zero all the registers should have been zero
+    CLR     __tmp_reg__
+    OR      __tmp_reg__, rB2 
+    OR      __tmp_reg__, rB1
+    OR      __tmp_reg__, rB0
     BREQ    ___divsf3x_INF         ; even 0/0
-    TST     rA3
+    CLR     __tmp_reg__
+    OR      __tmp_reg__, rA2 
+    OR      __tmp_reg__, rA1
+    OR      __tmp_reg__, rA0
     BREQ    ___divsf3x_ZERO        ; 0/x = 0
 
     ;calculate new exponent & check for overflow underflow