gallium: implement TGSI_OPCODE_NRM/NRM4 in tgsi_exec.c

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 53e92b96aee6b6d64c3593a725b44567dbca0b0b..41dffc3dbafa3f7199f078c49c5231163a1cbcf6 100644 (file)
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -2462,7 +2462,64 @@ exec_instruction(
       break;
 
    case TGSI_OPCODE_NRM:
-      assert (0);
+      /* 3-component vector normalize */
+      {
+         union tgsi_exec_channel tmp, dot;
+
+         /* 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 / 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 );
+         }
+      }
+      break;
+
+   case TGSI_OPCODE_NRM4:
+      /* 4-component vector normalize */
+      {
+         union tgsi_exec_channel tmp, dot;
+
+         /* tmp = dp4(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 );
+
+         FETCH( &r[3], 0, CHAN_W );
+         micro_mul( &dot, &r[3], &r[3] );
+         micro_add( &tmp, &tmp, &dot );
+
+         /* tmp = 1 / tmp */
+         micro_div( &tmp, &mach->Temps[TEMP_1_I].xyzw[TEMP_1_C], &tmp );
+
+         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 );
+         }
+      }
       break;
 
    case TGSI_OPCODE_DIV: