PARANOIA
Kahan's Floating Point Test Program
PARANOIA
is a C program which
tests the floating point arithmetic implementation on a computer.
PARANOIA was originally written in BASIC (!)
by Professor William Kahan.
The original, true, correct version of PARANOIA
is available in the PARANOIA subdirectory of
the NETLIB web site.
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
PARANOIA is available in
a C version and
a FORTRAN77 version and
a FORTRAN90 version.
Related Data and Programs:
MACHAR,
a C library which
computes the appropriate values
of machine constants for a given machine.
MACHINE,
a C library which
store the appropriate values
of machine constants for a given machine.
Reference:

Richard Karpinski,
Paranoia: A floatingpoint benchmark,
Byte Magazine,
Volume 10, Number 2, February 1985, pages 223235.
Source Code:
Examples and Tests:
List of Routines:

PARANOIA tests the floating point arithmetic implementation on a computer.

SIGFPE is the floating point exception receiver.

SIGN returns the sign of a floating point value.

PAUSE pauses program execution until the user hits RETURN.

TSTCOND checks whether an error has occurred.

BADCOND tracks and prints the various levels of error.

RANDOM computes a new random value.

SQXMINX ???.

NEWD ???.

SR3750 ???.

ISYEQX checks whether two quantities are equal, as they should be.

SR3980 ???

PRINTLFNPOSITIVE warns if a discrepancy occurred one or more times.

TstPtUf???

NOTIFY warns if a test appears to be inconsistent.

MSGLIST prints out a block of test.

INSTRUCTIONS prints some instructions.

HEADING prints a heading.

CHARACTERISTICS explains the arithmetic properties to be checked.

HISTORY prints out an explanation of the program, and history.
You can go up one level to
the C source codes.
Last revised on 30 December 2007.