Reverse Engineering for Beginners

CHAPTER 17. FLOATING-POINT UNIT CHAPTER 17. FLOATING-POINT UNIT

FNSTSWis executed:

Figure 17.8:OllyDbg:FNSTSWis executed

We see that theAXregister contain zeroes: indeed, all condition flags are zero. (OllyDbg disassembles theFNSTSWinstruction
asFSTSW—they are synonyms).