HP-UX Floating-Point Guide

Chapter 5 149
Manipulating the Floating-Point Status Register
Command-Line Mode Control: The +FP Compiler Option
Table 5-3 +FP Option Arguments
Value Behavior
V Enable traps on invalid floating-point operations.
v Disable traps on invalid floating-point operations.
Z Enable traps on divide by zero.
z Disable traps on divide by zero.
O Enable traps on floating-point overflow.
o Disable traps on floating-point overflow.
U Enable traps on floating-point underflow.
u Disable traps on floating-point underflow.
I Enable traps on floating-point operations that produce
inexact results.
i Disable traps on floating-point operations that produce
inexact results.
D Enable flush-to-zero (fast underflow) mode for denormalized
values. (Selecting this value enables flush-to-zero mode only
if it is available on the processor that is used at run time.)
d Disable flush-to-zero (fast underflow) mode for denormalized
values.