Microchip Technology SW006023-2N Data Sheet

Implementation-Defined Behavior

 2012 Microchip Technology Inc.

DS51686E-page 199

18.17 LIBRARY FUNCTIONS

ISO Standard:

“The Null Pointer constant to which the macro NULL expands (C90
7.1.6, C99 7.17).”

Implementation:

(void *)0

ISO Standard:

“Any library facilities available to a freestanding program, other than the
minimal set required by clause 4 (5.1.2.1).”

Implementation:

See the “32-Bit Language Tools Libraries” (DS51685).

ISO Standard:

“The format of the diagnostic printed by the assert macro (7.2.1.1).”

Implementation:

“Failed assertion ‘message’ at line line of ‘filename’.\n”

ISO Standard:

“The default state for the FENV_ACCESS pragma (7.6.1).”

Implementation:

Unimplemented.

ISO Standard:

“The representation of floating-point exception flags stored by the

fegetexceptflag

function (7.6.2.2).”

Implementation:

Unimplemented.

ISO Standard:

“Whether the

feraiseexcept

function raises the inexact exception

in addition to the overflow or underflow exception (7.6.2.3).”

Implementation:

Unimplemented.

ISO Standard:

“Floating environment macros other than FE_DFL_ENV that can be
used as the argument to the

fesetenv

feupdateenv

function

(7.6.4.3, 7.6.4.4).”

Implementation:

Unimplemented.

ISO Standard:

“Strings other than “C” and “” that may be passed as the second
argument to the

setlocale

function (7.11.1.1).”

Implementation:

None.

ISO Standard:

“The types defined for

float_t

and

double_t

when the value of

the FLT_EVAL_METHOD macro is less than 0 or greater than 2 (7.12).”

Implementation:

Unimplemented.

ISO Standard:

“The infinity to which the INFINITY macro expands, if any (7.12).”

Implementation:

Unimplemented.

ISO Standard:

“The quiet NaN to which the NAN macro expands, when it is defined
(7.12).”

Implementation:

Unimplemented.

ISO Standard:

“Domain errors for the mathematics functions, other than those
required by this International Standard (7.12.1).”

Implementation:

None.

ISO Standard:

“The values returned by the mathematics functions, and whether

errno

is set to the value of the macro EDOM, on domain errors

(7.12.1).”

Implementation:

errno

is set to

EDOM

on domain errors.

ISO Standard:

“Whether the mathematics functions set

errno

to the value of the

macro ERANGE on overflow and/or underflow range errors (7.12.1).”

Implementation:

Yes.

ISO Standard:

“The default state for the FP_CONTRACT pragma (7.12.2)

Implementation:

Unimplemented.

ISO Standard:

“Whether a domain error occurs or zero is returned when the

fmod

function has a second argument of zero (7.12.10.1).”

Implementation:

NaN is returned.

ISO Standard:

“The base-2 logarithm of the modulus used by the

remquo

function in

reducing the quotient (7.12.10.3).”

Implementation:

Unimplemented.