Assembly Language for Beginners

1.19. FLOATING-POINT UNIT

FNSTSWhas been executed:

Figure 1.69:OllyDbg:FNSTSWhas been executed

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