+ if (IS_CHANNEL_ENABLED(*inst, CHAN_X) ||
+ IS_CHANNEL_ENABLED(*inst, CHAN_Y) ||
+ IS_CHANNEL_ENABLED(*inst, CHAN_Z)) {
+ /* r0 = dp3(src0, src0) */
+ FETCH(&r[2], 0, CHAN_X);
+ micro_mul(&r[0], &r[2], &r[2]);
+ FETCH(&r[4], 0, CHAN_Y);
+ micro_mul(&r[8], &r[4], &r[4]);
+ micro_add(&r[0], &r[0], &r[8]);
+ FETCH(&r[6], 0, CHAN_Z);
+ micro_mul(&r[8], &r[6], &r[6]);
+ micro_add(&r[0], &r[0], &r[8]);
+
+ /* r1 = dp3(src0, src1) */
+ FETCH(&r[3], 1, CHAN_X);
+ micro_mul(&r[1], &r[2], &r[3]);
+ FETCH(&r[5], 1, CHAN_Y);
+ micro_mul(&r[8], &r[4], &r[5]);
+ micro_add(&r[1], &r[1], &r[8]);
+ FETCH(&r[7], 1, CHAN_Z);
+ micro_mul(&r[8], &r[6], &r[7]);
+ micro_add(&r[1], &r[1], &r[8]);
+
+ /* r1 = 2 * r1 / r0 */
+ micro_add(&r[1], &r[1], &r[1]);
+ micro_div(&r[1], &r[1], &r[0]);
+
+ if (IS_CHANNEL_ENABLED(*inst, CHAN_X)) {
+ micro_mul(&r[2], &r[2], &r[1]);
+ micro_sub(&r[2], &r[2], &r[3]);
+ STORE(&r[2], 0, CHAN_X);
+ }
+ if (IS_CHANNEL_ENABLED(*inst, CHAN_Y)) {
+ micro_mul(&r[4], &r[4], &r[1]);
+ micro_sub(&r[4], &r[4], &r[5]);
+ STORE(&r[4], 0, CHAN_Y);
+ }
+ if (IS_CHANNEL_ENABLED(*inst, CHAN_Z)) {
+ micro_mul(&r[6], &r[6], &r[1]);
+ micro_sub(&r[6], &r[6], &r[7]);
+ STORE(&r[6], 0, CHAN_Z);
+ }
+ }
+ if (IS_CHANNEL_ENABLED(*inst, CHAN_W)) {
+ STORE(&mach->Temps[TEMP_1_I].xyzw[TEMP_1_C], 0, CHAN_W);
+ }