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tgsi: Rewrite NRM opcode, store 1.0 in W component.

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This commit is contained in:
Michal Krol 2009-03-12 11:54:11 +01:00
parent d4ea9a2652
commit 321634d80b
1 changed files with 27 additions and 23 deletions
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50
src/gallium/auxiliary/tgsi/tgsi_exec.c
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@ -2688,31 +2688,35 @@ exec_instruction(
case TGSI_OPCODE_NRM:
/* 3-component vector normalize */
{
union tgsi_exec_channel tmp, dot;
if(IS_CHANNEL_ENABLED(*inst, CHAN_X) ||
IS_CHANNEL_ENABLED(*inst, CHAN_Y) ||
IS_CHANNEL_ENABLED(*inst, CHAN_Z)) {
/* r3 = sqrt(dp3(src0, src0)) */
FETCH(&r[0], 0, CHAN_X);
micro_mul(&r[3], &r[0], &r[0]);
FETCH(&r[1], 0, CHAN_Y);
micro_mul(&r[4], &r[1], &r[1]);
micro_add(&r[3], &r[3], &r[4]);
FETCH(&r[2], 0, CHAN_Z);
micro_mul(&r[4], &r[2], &r[2]);
micro_add(&r[3], &r[3], &r[4]);
micro_sqrt(&r[3], &r[3]);
/* tmp = dp3(src0, src0): */
FETCH( &r[0], 0, CHAN_X );
micro_mul( &tmp, &r[0], &r[0] );
FETCH( &r[1], 0, CHAN_Y );
micro_mul( &dot, &r[1], &r[1] );
micro_add( &tmp, &tmp, &dot );
FETCH( &r[2], 0, CHAN_Z );
micro_mul( &dot, &r[2], &r[2] );
micro_add( &tmp, &tmp, &dot );
/* tmp = 1 / sqrt(tmp) */
micro_sqrt( &tmp, &tmp );
micro_div( &tmp, &mach->Temps[TEMP_1_I].xyzw[TEMP_1_C], &tmp );
/* note: w channel is undefined */
FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) {
/* chan = chan * tmp */
micro_mul( &r[chan_index], &tmp, &r[chan_index] );
STORE( &r[chan_index], 0, chan_index );
if (IS_CHANNEL_ENABLED(*inst, CHAN_X)) {
micro_div(&r[0], &r[0], &r[3]);
STORE(&r[0], 0, CHAN_X);
}
if (IS_CHANNEL_ENABLED(*inst, CHAN_Y)) {
micro_div(&r[1], &r[1], &r[3]);
STORE(&r[1], 0, CHAN_Y);
}
if (IS_CHANNEL_ENABLED(*inst, CHAN_Z)) {
micro_div(&r[2], &r[2], &r[3]);
STORE(&r[2], 0, CHAN_Z);
}
}
if (IS_CHANNEL_ENABLED(*inst, CHAN_W)) {
STORE(&mach->Temps[TEMP_1_I].xyzw[TEMP_1_C], 0, CHAN_W);
}
break;