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Lines Matching refs:Ulp

536 /* returns ulp(x) for x a 'normal' double-precision number */
538 Ulp (double x)
546    /* as ulp(x) <= y = x/2^52 < 2*ulp(x),
547    we have x + ulp(x) <= x + y <= x + 2*ulp(x),
548    therefore o(x + y) = x + ulp(x) or x + 2*ulp(x) */
551    eps = eps - x; /* ulp(x) or 2*ulp(x) */
556 /* returns the number of ulp's between a and b,
560 ulp (double a, double b)
570   return (int) ((a - b) / Ulp (a));