HelenOS sources

fpclassify         97 uspace/lib/c/include/math.h #define fpclassify(x)  __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (x))
fpclassify        119 uspace/lib/c/include/math.h #define fpclassify(x)  __fpclassify(sizeof(x), (x))
fpclassify         97 uspace/lib/posix/include/libc/math.h #define fpclassify(x)  __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, (x))
fpclassify        119 uspace/lib/posix/include/libc/math.h #define fpclassify(x)  __fpclassify(sizeof(x), (x))