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Lines Matching refs:Zw

585     // we need to compute Zw
588     GGLfixed Zw;
591     if (z<=0)               Zw = n;
592     else if (z>=0x10000)    Zw = f;
593     else            Zw = gglMulAddx(z, (f-n), n);
596         iterators[0] = c->fog.fog(c, Zw);
601         int32_t z = (Zw & ~(Zw>>31));