Lines Matching defs:w1
37 * log2(x) = w1 + w2,
38 * where w1 has 24 bits trailing zero.
163 double y1, y2, w1, w2;
286 /* first compute log2(ax) = w1+w2, with 24 bits w1 */
287 w1 = log2_x(ax, &w2);
289 /* split up y into y1+y2 and compute (y1+y2)*(w1+w2) */
293 y1 = y * w1;
297 y2 = (y - y1) * w1 + y * w2;
298 y1 *= w1;
328 w1 = y2 - ((double) k * 0.015625 - y1);
330 z = _TBL_exp2_lo[j] + (w2 * w1) * (E1 + w1 * (E2 + w1 * (E3 + w1 *
331 (E4 + w1 * E5))));