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      1  1.7  riastrad /* $NetBSD: t_libm.h,v 1.7 2018/11/07 03:59:36 riastradh Exp $ */
      2  1.1       dsl 
      3  1.1       dsl /*
      4  1.1       dsl  * Check result of fn(arg) is correct within the bounds.
      5  1.1       dsl  * Should be ok to do the checks using 'double' for 'float' functions.
      6  1.5       dsl  * On i386 float and double values are returned on the x87 stack and might
      7  1.5       dsl  * be out of range for the function - so save and print as 'long double'.
      8  1.5       dsl  * (otherwise you can get 'inf != inf' reported!)
      9  1.1       dsl  */
     10  1.6     joerg #define T_LIBM_CHECK(subtest, fn, arg, expect_, epsilon_) do { \
     11  1.6     joerg 	long double epsilon = epsilon_; \
     12  1.6     joerg 	long double expect = expect_; \
     13  1.5       dsl 	long double r = fn(arg); \
     14  1.7  riastrad 	long double e = fabsl((r - expect)/expect); \
     15  1.7  riastrad 	if (!(r == expect || e <= epsilon)) \
     16  1.1       dsl 		atf_tc_fail_nonfatal( \
     17  1.6     joerg 		    "subtest %u: " #fn "(%g) is %Lg (%.14La) " \
     18  1.6     joerg 		    "not %Lg (%.13La), error %Lg (%.6La) > %Lg", \
     19  1.4       dsl 		    subtest, arg, r, r, expect, expect, e, e, epsilon); \
     20  1.1       dsl     } while (0)
     21  1.1       dsl 
     22  1.1       dsl /* Check that the result of fn(arg) is NaN */
     23  1.1       dsl #ifndef __vax__
     24  1.1       dsl #define T_LIBM_CHECK_NAN(subtest, fn, arg) do { \
     25  1.1       dsl 	double r = fn(arg); \
     26  1.1       dsl 	if (!isnan(r)) \
     27  1.1       dsl 		atf_tc_fail_nonfatal("subtest %u: " #fn "(%g) is %g not NaN", \
     28  1.1       dsl 		    subtest, arg, r); \
     29  1.1       dsl     } while (0)
     30  1.1       dsl #else
     31  1.1       dsl /* vax doesn't support NaN */
     32  1.1       dsl #define T_LIBM_CHECK_NAN(subtest, fn, arg) (void)(arg)
     33  1.1       dsl #endif
     34  1.1       dsl 
     35  1.1       dsl /* Check that the result of fn(arg) is +0.0 */
     36  1.1       dsl #define T_LIBM_CHECK_PLUS_ZERO(subtest, fn, arg) do { \
     37  1.1       dsl 	double r = fn(arg); \
     38  1.1       dsl 	if (fabs(r) > 0.0 || signbit(r) != 0) \
     39  1.1       dsl 		atf_tc_fail_nonfatal("subtest %u: " #fn "(%g) is %g not +0.0", \
     40  1.1       dsl 		    subtest, arg, r); \
     41  1.1       dsl     } while (0)
     42  1.1       dsl 
     43  1.1       dsl /* Check that the result of fn(arg) is -0.0 */
     44  1.1       dsl #define T_LIBM_CHECK_MINUS_ZERO(subtest, fn, arg) do { \
     45  1.1       dsl 	double r = fn(arg); \
     46  1.1       dsl 	if (fabs(r) > 0.0 || signbit(r) == 0) \
     47  1.1       dsl 		atf_tc_fail_nonfatal("subtest %u: " #fn "(%g) is %g not -0.0", \
     48  1.1       dsl 		    subtest, arg, r); \
     49  1.1       dsl     } while (0)
     50  1.1       dsl 
     51  1.1       dsl /* Some useful constants (for test vectors) */
     52  1.3    martin #ifndef __vax__	/* no NAN nor +/- INF on vax */
     53  1.2       dsl #define T_LIBM_NAN	(0.0 / 0.0)
     54  1.2       dsl #define T_LIBM_PLUS_INF	(+1.0 / 0.0)
     55  1.2       dsl #define T_LIBM_MINUS_INF (-1.0 / 0.0)
     56  1.3    martin #endif
     57  1.1       dsl 
     58  1.1       dsl /* One line definition of a simple test */
     59  1.2       dsl #define ATF_LIBM_TEST(name, description) \
     60  1.1       dsl ATF_TC(name); \
     61  1.1       dsl ATF_TC_HEAD(name, tc) { atf_tc_set_md_var(tc, "descr", description); } \
     62  1.1       dsl ATF_TC_BODY(name, tc)
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