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tgsi/sse2: Cleanup NRM/NRM4 implementation.

Browse source 
Fix comments.
Make sure .w is set to 1.0 for NRM.
Optimise for non-.xyzw writemasks.
This commit is contained in:
Michal Krol 2009-04-10 11:58:49 +02:00
parent 05c70f8f5d
commit 5fae9514c2
1 changed files with 76 additions and 25 deletions
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101
src/gallium/auxiliary/tgsi/tgsi_sse2.c
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@ -2178,32 +2178,83 @@ emit_instruction(
/* 3 or 4-component normalization */
{
uint dims = (inst->Instruction.Opcode == TGSI_OPCODE_NRM) ? 3 : 4;
/* note: cannot use xmm regs 2/3 here (see emit_rsqrt() above) */
FETCH( func, *inst, 4, 0, CHAN_X ); /* xmm4 = src[0].x */
FETCH( func, *inst, 5, 0, CHAN_Y ); /* xmm5 = src[0].y */
FETCH( func, *inst, 6, 0, CHAN_Z ); /* xmm6 = src[0].z */
if (dims == 4) {
FETCH( func, *inst, 7, 0, CHAN_W ); /* xmm7 = src[0].w */
}
emit_MOV( func, 0, 4 ); /* xmm0 = xmm3 */
emit_mul( func, 0, 4 ); /* xmm0 *= xmm3 */
emit_MOV( func, 1, 5 ); /* xmm1 = xmm4 */
emit_mul( func, 1, 5 ); /* xmm1 *= xmm4 */
emit_add( func, 0, 1 ); /* xmm0 += xmm1 */
emit_MOV( func, 1, 6 ); /* xmm1 = xmm5 */
emit_mul( func, 1, 6 ); /* xmm1 *= xmm5 */
emit_add( func, 0, 1 ); /* xmm0 += xmm1 */
if (dims == 4) {
emit_MOV( func, 1, 7 ); /* xmm1 = xmm7 */
emit_mul( func, 1, 7 ); /* xmm1 *= xmm7 */
emit_add( func, 0, 0 ); /* xmm0 += xmm1 */
}
emit_rsqrt( func, 1, 0 ); /* xmm1 = 1/sqrt(xmm0) */
FOR_EACH_DST0_ENABLED_CHANNEL( *inst, chan_index ) {
if (chan_index < dims) {
emit_mul( func, 4+chan_index, 1); /* xmm[4+ch] *= xmm1 */
STORE( func, *inst, 4+chan_index, 0, chan_index );
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_X) ||
IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Y) ||
IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Z) ||
(IS_DST0_CHANNEL_ENABLED(*inst, CHAN_W) && dims == 4)) {
/* NOTE: Cannot use xmm regs 2/3 here (see emit_rsqrt() above). */
/* xmm4 = src.x */
/* xmm0 = src.x * src.x */
FETCH(func, *inst, 0, 0, CHAN_X);
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_X)) {
emit_MOV(func, 4, 0);
}
emit_mul(func, 0, 0);
/* xmm5 = src.y */
/* xmm0 = xmm0 + src.y * src.y */
FETCH(func, *inst, 1, 0, CHAN_Y);
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Y)) {
emit_MOV(func, 5, 1);
}
emit_mul(func, 1, 1);
emit_add(func, 0, 1);
/* xmm6 = src.z */
/* xmm0 = xmm0 + src.z * src.z */
FETCH(func, *inst, 1, 0, CHAN_Z);
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Z)) {
emit_MOV(func, 6, 1);
}
emit_mul(func, 1, 1);
emit_add(func, 0, 1);
if (dims == 4) {
/* xmm7 = src.w */
/* xmm0 = xmm0 + src.w * src.w */
FETCH(func, *inst, 1, 0, CHAN_W);
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_W)) {
emit_MOV(func, 7, 1);
}
emit_mul(func, 1, 1);
emit_add(func, 0, 1);
}
/* xmm1 = 1 / sqrt(xmm0) */
emit_rsqrt(func, 1, 0);
/* dst.x = xmm1 * src.x */
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_X)) {
emit_mul(func, 4, 1);
STORE(func, *inst, 4, 0, CHAN_X);
}
/* dst.y = xmm1 * src.y */
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Y)) {
emit_mul(func, 5, 1);
STORE(func, *inst, 5, 0, CHAN_Y);
}
/* dst.z = xmm1 * src.z */
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_Z)) {
emit_mul(func, 6, 1);
STORE(func, *inst, 6, 0, CHAN_Z);
}
/* dst.w = xmm1 * src.w */
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_X) && dims == 4) {
emit_mul(func, 7, 1);
STORE(func, *inst, 7, 0, CHAN_W);
}
}
/* dst0.w = 1.0 */
if (IS_DST0_CHANNEL_ENABLED(*inst, CHAN_W) && dims == 3) {
emit_tempf(func, 0, TEMP_ONE_I, TEMP_ONE_C);
STORE(func, *inst, 0, 0, CHAN_W);
}
}
break;