HelenOS sources

FP_INFINITE        97 uspace/lib/c/include/math.h #define fpclassify(x)  __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (x))
FP_INFINITE       120 uspace/lib/c/include/math.h #define isfinite(x)    (fpclassify(x) > FP_INFINITE)
FP_INFINITE       121 uspace/lib/c/include/math.h #define isinf(x)       (fpclassify(x) == FP_INFINITE)
FP_INFINITE        97 uspace/lib/posix/include/libc/math.h #define fpclassify(x)  __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (x))
FP_INFINITE       120 uspace/lib/posix/include/libc/math.h #define isfinite(x)    (fpclassify(x) > FP_INFINITE)
FP_INFINITE       121 uspace/lib/posix/include/libc/math.h #define isinf(x)       (fpclassify(x) == FP_INFINITE)