+
+ {
+ int large_exp = (MAX_EXP - 1 < 1000 ? MAX_EXP - 1 : 1000);
+ DOUBLE large = my_ldexp (L_(1.0), large_exp); /* = 2^large_exp */
+ for (i = 0; i < SIZEOF (RANDOM) / 10; i++)
+ for (j = 0; j < SIZEOF (RANDOM) / 10; j++)
+ {
+ DOUBLE x = large * RANDOM[i]; /* 0.0 <= x <= 2^large_exp */
+ DOUBLE y = RANDOM[j]; /* 0.0 <= y < 1.0 */
+ if (y > L_(0.0))
+ {
+ DOUBLE z = FMOD (x, y);
+ /* Regardless how large the rounding errors are, the result
+ must be >= 0, < y. */
+ ASSERT (z >= L_(0.0));
+ ASSERT (z < y);
+ }
+ }
+ }