Lines Matching refs:jj0
41 * |x| = jj0 + r with jj0 an integer and the remainder r satisfies
45 * cospi(x) = cos(pi*(jj0+r))
46 * = cos(pi*jj0) * cos(pi*r) - sin(pi*jj0) * sin(pi*r)
47 * = cos(pi*jj0) * cos(pi*r)
50 * If jj0 is even, then cos(pi*jj0) = 1. If jj0 is odd, then cos(pi*jj0) = -1.
85 uint32_t hx, ix, jj0, lx;
112 FFLOOR(x, jj0, ix, lx); /* Integer part of ax. */
130 if (jj0 > 30)
132 jj0 = (uint32_t)x;
133 return (jj0 & 1 ? -c : c);