HP SunSoft Pascal 4.0 - Manual (Page 53)

The Pascal Compiler 29
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Do not use this option for programs that depend on IEEE standard exception
handling; you can get different numerical results, premature program
termination, or unexpected
SIGFPE signals.
Note – The criteria for the -fast option vary with the compilers from SunSoft:
C, C++, FORTRAN 77, Fortran 90, and Pascal. See the appropriate
documentation for the specifics.
-fnonstd
The -fnonstd option causes nonstandard initialization of floating-point
arithmetic hardware. By default, IEEE 754 floating-point arithmetic is nonstop,
and underflows are gradual. (See the Numerical Computation Guide for details.)
The
–fnonstd option causes hardware traps to be enabled for floating-point
overflow, division by zero, and invalid operation exceptions. These hardware
traps are converted into
SIGFPE signals, and if the program has no SIGFPE
handler, it terminates with a memory dump.
-fnonstd also causes the math library to be linked in by passing -lm to the
linker.
(Solaris 2.x only) This option is a synonym for -fns -ftrap=common .
–fns
(Solaris 2.x only) The -fns option turns on the SPARC non-standard floating-
point mode.
The default is the SPARC standard floating-point mode.
If you compile one routine with -fns , then compile all routines of the program
with the –fns option; otherwise, unexpected results may occur.
–fround= r
(Solaris 2.x only) The -fround= r option sets the IEEE 754 rounding mode that
is established during program initialization.
r must be one of: nearest , tozero , negative , positive .