diff options
Diffstat (limited to 'ext/fputils/tests/fp80_cvtd.c')
| -rw-r--r-- | ext/fputils/tests/fp80_cvtd.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/ext/fputils/tests/fp80_cvtd.c b/ext/fputils/tests/fp80_cvtd.c index 425a5c44a..5a49d3426 100644 --- a/ext/fputils/tests/fp80_cvtd.c +++ b/ext/fputils/tests/fp80_cvtd.c @@ -35,6 +35,15 @@ #include <stdio.h> #include <stdlib.h> +/* We provide our own version of isinf_sgn since the C99 standard + * doesn't guarantee that isinf() returns the sign of the infinity + * (most implementations do). */ +static inline int +isinf_sgn(double x) +{ + return isinf(x) ? (signbit(x) ? -1 : 1) : 0; +} + static void test_fp80_cvtd_class(const char *name, fp80_t fin, int class) { @@ -48,10 +57,10 @@ test_fp80_cvtd_class(const char *name, fp80_t fin, int class) } static void -test_fp80_cvtd_inf(const char *name, fp80_t fin, int inf_class) +test_fp80_cvtd_inf(const char *name, fp80_t fin, int expected_inf_class) { double d = fp80_cvtd(fin); - if (isinf(d) != inf_class) { + if (isinf_sgn(d) != expected_inf_class) { test_diag("wrong infinity type"); test_fail(name); } else { |