83Plus:BCALLs:4267

Synopsis

Official Name: DecO1Exp

BCALL Address: 4267

Decrements op1's exponent.

Inputs

• op1 = floating point number

Outputs

• op1 's exponent decremented

Registers Destroyed

• A

Comments

This function decrements the exponent of op1. Unlike FDiv10, checks are not performed to prevent an underflow.

Example

Suppose op1=00h,80h,10h,00h,... After B_CALL DecO1Exp, op1=00h,7Fh,10h,00h,...

Suppose op1=00h,00h,10h,00h,... After B_CALL DecO1Exp, op1=00h,FFh,10h,00h,...