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Better (-1..1) random numbers.

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Now the distribution should be more even as the rng doesn't affect the
exponent.
This commit is contained in:
Bill Currie 2013-03-13 14:41:04 +09:00
parent b6d4766201
commit 3193ffd9cc
1 changed files with 4 additions and 2 deletions
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6
libs/util/test/test-bary.c
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@ -58,9 +58,11 @@ rnd (mtstate_t *mt)
} uf; } uf;
do { do {
uf.u = mtwist_rand (mt) & 0x3fffffff; uf.u = mtwist_rand (mt) & 0x007fffff;
} while (!uf.u); } while (!uf.u);
return uf.f - 1.0; uf.u |= 0x40000000;
return uf.f - 3.0;
} }
int int