10. The atod Result

• The offset of the terminating non-digit character is put in ESI.

• If no input error detected,

  1. The overflow flag OF is cleared.

  2. Other flags are set accordingly to the result in EAX:

     • SF is 1 if the number is negative, and 0 otherwise.

     • ZF is 1 if the number is 0, and 0 if the number is nonzero.

     • PF reflects the parity of the number returned in EAX.

     • In addition, CF is 0 and DF is unchanged.

• If input error is detected,

  • The overflow flag OF is set to 1.

  • EAX register contains zero.

• Input error occurs if the source has no digits or is out of the range

  • -2,147,483,648 to 2,147,483,647