diff options
Diffstat (limited to 'src/math/cos.c')
| -rw-r--r-- | src/math/cos.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/math/cos.c b/src/math/cos.c index d10629a3..86a1c995 100644 --- a/src/math/cos.c +++ b/src/math/cos.c @@ -1,6 +1,7 @@ # define TGSOURCE "cos.c" #include <math.h> #include "_tgmath.h" +#include "fenv.h" #include "errno.h" /** cosine **/ @@ -12,6 +13,12 @@ TYPE TGFN(cos)(TYPE x) TYPE cosine = 1.0; TYPE power = 1.0; + switch (fpclassify(x)) { + case FP_ZERO: return 1.0; + case FP_INFINITE: feraiseexcept(FE_INVALID); return NAN; + default: break; + } + if (0) { errno = ERANGE; /* The result cannot be represented */ /* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */ |