diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libm/t_bit.c')
-rw-r--r-- | contrib/netbsd-tests/lib/libm/t_bit.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libm/t_bit.c b/contrib/netbsd-tests/lib/libm/t_bit.c new file mode 100644 index 000000000000..b6e0218f601c --- /dev/null +++ b/contrib/netbsd-tests/lib/libm/t_bit.c @@ -0,0 +1,102 @@ +/* $NetBSD: t_bit.c,v 1.1 2019/04/26 08:52:16 maya Exp $ */ + +/* + * Written by Maya Rashish <maya@NetBSD.org> + * Public domain. + * + * Testing signbit{,f,l} function correctly + */ + +#include <atf-c.h> +#include <float.h> +#include <math.h> +#include <stdio.h> +#include <stdint.h> +#include <stdbool.h> + +static const struct { + double input; + bool is_negative; +} values[] = { + { -1, true}, + { -123, true}, + { -123E6, true}, +#ifdef INFINITY + { -INFINITY, true}, + { INFINITY, false}, +#endif + { 123E6, false}, + { 0, false}, + { -FLT_MIN, true}, + { FLT_MIN, false}, + /* + * Cannot be accurately represented as float, + * but sign should be preserved + */ + { DBL_MAX, false}, + { -DBL_MAX, true}, +}; + +#ifdef __HAVE_LONG_DOUBLE +static const struct { + long double input; + bool is_negative; +} ldbl_values[] = { + { -LDBL_MIN, true}, + { LDBL_MIN, false}, + { LDBL_MAX, false}, + { -LDBL_MAX, true}, +}; +#endif + +ATF_TC(signbit); +ATF_TC_HEAD(signbit, tc) +{ + atf_tc_set_md_var(tc, "descr","Check that signbit functions correctly"); +} + +ATF_TC_BODY(signbit, tc) +{ + double iterator_d; + float iterator_f; + + for (unsigned int i = 0; i < __arraycount(values); i++) { + iterator_d = values[i].input; + iterator_f = (float) values[i].input; + if (signbit(iterator_f) != values[i].is_negative) + atf_tc_fail("%s:%d iteration %d signbitf is wrong" + " about the sign of %f", __func__, + __LINE__, i, iterator_f); + if (signbit(iterator_d) != values[i].is_negative) + atf_tc_fail("%s:%d iteration %d signbit is wrong" + "about the sign of %f", __func__, + __LINE__,i, iterator_d); + +#ifdef __HAVE_LONG_DOUBLE + long double iterator_l = values[i].input; + if (signbit(iterator_l) != values[i].is_negative) + atf_tc_fail("%s:%d iteration %d signbitl is wrong" + " about the sign of %Lf", __func__, + __LINE__, i, iterator_l); +#endif + } + +#ifdef __HAVE_LONG_DOUBLE + for (unsigned int i = 0; i < __arraycount(ldbl_values); i++) { + if (signbit(ldbl_values[i].input) != ldbl_values[i].is_negative) + atf_tc_fail("%s:%d iteration %d signbitl is" + "wrong about the sign of %Lf", + __func__, __LINE__, i, + ldbl_values[i].input); + } +#endif + +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, signbit); + + return atf_no_error(); +} |