+ added readme.txt

+ comment

libraries/IEEE754tools/IEEE754tools.h

@@ -334,7 +334,7 @@ float IEEE_FLIP(float number)
 // x = *(((byte*) &number)+3) & 0x7F;           // x = fabs(number);
 // GAIN = factor 2
 
-// *(((byte*) &number)+3) |= 0x80;              // number == fabs(number);
+// *(((byte*) &number)+3) |= 0x80;              // number == -fabs(number);
 // x = *(((byte*) &number)+3) | 0x80;           // x == -fabs(number);
 // GAIN = factor 2
 

libraries/IEEE754tools/readme.txt

@@ -0,0 +1,4 @@
+
+IEEE754_tools.h contains a collection of bit-hacks to speed up a number of operations on floating pointnumbers on the Arduino.
+If you don't need micro-second speedups do not use these code snippets.
+in short: USE WITH CARE