83Plus:BCALLs:408A

Synopsis

Official Name: InvOP1SC

BCALL Address: 408A

Negates the complex value represented by OP1 and OP2.

Inputs

• OP1:OP2 = complex number

Outputs

• OP1:OP2 = -(OP1:OP2)

Registers Destroyed

• AF

Comments

This routine inverts the sign bits of OP1 and OP2 unless they are floating point zeros. If the value in OP1 or OP2 is a floating point zero, then the sign bit of the floating point number is not inverted.

Example

B_CALL OP1Set3  ;OP1=floating point 3
B_CALL OP2Set2  ;OP2=floating point 2
;now OP1:OP2=3+2i
B_CALL InvOP1SC  ;returns with OP1:OP2=-3-2i