HelenOS sources

islessequal       107 uspace/lib/c/include/math.h #define islessequal(x, y)    __builtin_islessequal(x, y)
islessequal       129 uspace/lib/c/include/math.h #define islessequal(x, y)    (!!(__fcompare(sizeof(x), sizeof(y), (x), (y)) & (__FCOMPARE_LESS | __FCOMPARE_EQUAL)))
islessequal       107 uspace/lib/posix/include/libc/math.h #define islessequal(x, y)    __builtin_islessequal(x, y)
islessequal       129 uspace/lib/posix/include/libc/math.h #define islessequal(x, y)    (!!(__fcompare(sizeof(x), sizeof(y), (x), (y)) & (__FCOMPARE_LESS | __FCOMPARE_EQUAL)))