diff options
Diffstat (limited to 'math/test-misc.c')
| -rw-r--r-- | math/test-misc.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/math/test-misc.c b/math/test-misc.c index 098695f73f..514035554c 100644 --- a/math/test-misc.c +++ b/math/test-misc.c @@ -19,6 +19,7 @@ #include <math.h> #include <stdio.h> +#include <string.h> int @@ -75,6 +76,26 @@ main (void) } } # endif + +#if 0 + { + int e; + long double r = frexpl (LDBL_MIN * LDBL_EPSILON, &e); + + if (r != 0.5) + { + printf ("frexpl (LDBL_MIN * LDBL_EPSILON, ...): mantissa wrong: %Lg\n", + r); + result = 1; + } + else if (e != -16444) + { + printf ("frexpl (LDBL_MIN * LDBL_EPSILON, ...): exponent wrong: %d\n", + e); + result = 1; + } + } +#endif #endif { @@ -120,8 +141,9 @@ main (void) } if (fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0)) != FP_SUBNORMAL) { - printf ("fpclassify (LDBL_MIN-epsilon) failed: %d\n", - fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0))); + printf ("fpclassify (LDBL_MIN-epsilon) failed: %d (%Lg)\n", + fpclassify (nextafterl (LDBL_MIN, LDBL_MIN / 2.0)), + nextafterl (LDBL_MIN, LDBL_MIN / 2.0)); result = 1; } #endif @@ -161,6 +183,29 @@ main (void) result = 1; } } + + /* Special NaNs in x86 long double. Test for scalbl. */ + { + union + { + char b[10]; + long double d; + } u = + { .b = { 0, 1, 0, 0, 0, 0, 0, 0xc0, 0xff, 0x7f } }; + long double r; + + r = scalbl (u.d, 0.0); + if (!isnan (r)) + { + puts ("scalbl(NaN, 0) does not return NaN"); + result = 1; + } + else if (memcmp (&r, &u.d, sizeof (double)) != 0) + { + puts ("scalbl(NaN, 0) does not return the same NaN"); + result = 1; + } + } #endif return result; |