The address of this routine is found in the table of addresses. It is called via the calculator literal 42 by the routines at CIRCLE, DRAW, CD_PRMS1, PRINT_FP, get_argt and cos. It is also called indirectly via fp_calc_2.

This subroutine performs its unary operation by ensuring that the sign bit of a floating-point number is reset.

'Small integers' have to be treated separately. Most of the work is shared with the 'unary minus' operation.