C/C++ Programmer's Guide (G06.27+, H06.08+, J06.03+)

For more information about the c99 utility, see the c99(1) reference page either online or in the
Open System Services Shell and Utilities Reference Manual.
Functions that Do Not Support Tandem Floating Point
These functions support the IEEE floating point format but not the Tandem floating point format:
scalbn()nan()log2()exp2()
scalbnf()nanf()log2f()exp2f()
scalbnl()nanl()log2l()exp2l()
scalbln()nearbyint()lrint()fdim()
scalblnf()nearbyintf()lrintf()fdimf()
scalblnl()nearbyintl()lrintl()fdiml()
tgamma()nexttoward()llrint()fma()
tgammaf()nexttowardf()llrintf()fmaf()
tgammal()nexttowardl()llrintl()fmal()
trunc()remquo()lround()fmax()
truncf()remquof()lroundf()fmaxf()
truncl()remquol()lroundl()fmaxl()
round()llround()fmin()
roundf()llroundf()fminf()
roundl()llroundl()fminl()
Function-Like Macros that Do Not Support Tandem Floating Point
These function-like macros support the IEEE floating point format but not the Tandem floating point
format:
fpclassify()
signbit()
isfinite()
isinf()
isnan()
isnormal()
isgreater()
isgreaterequal()
isless()
islessequal()
islessgreater()
isunordered()
462 c99 Full Support