From 9c9c2cd7255a50559c97c512416c2be17b869a03 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Thu, 4 Sep 2003 15:18:22 +0000
Subject: Added new opcodes for ARB_fragment_program, like ABS, CMP, TXB, etc.

---
 src/mesa/swrast/s_nvfragprog.c | 62 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

(limited to 'src/mesa/swrast/s_nvfragprog.c')

diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c
index 92fc6ed452..c230ff38de 100644
--- a/src/mesa/swrast/s_nvfragprog.c
+++ b/src/mesa/swrast/s_nvfragprog.c
@@ -595,6 +595,17 @@ execute_program( GLcontext *ctx,
       }
 
       switch (inst->Opcode) {
+         case FP_OPCODE_ABS:
+            {
+               GLfloat a[4], result[4];
+               fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+               result[0] = FABSF(a[0]);
+               result[1] = FABSF(a[1]);
+               result[2] = FABSF(a[2]);
+               result[3] = FABSF(a[3]);
+               store_vector4( inst, machine, result );
+            }
+            break;
          case FP_OPCODE_ADD:
             {
                GLfloat a[4], b[4], result[4];
@@ -607,6 +618,19 @@ execute_program( GLcontext *ctx,
                store_vector4( inst, machine, result );
             }
             break;
+         case FP_OPCODE_CMP:
+            {
+               GLfloat a[4], b[4], c[4], result[4];
+               fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+               fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+               fetch_vector4( ctx, &inst->SrcReg[2], machine, program, c );
+               result[0] = a[0] < 0.0F ? b[0] : c[0];
+               result[1] = a[1] < 0.0F ? b[1] : c[1];
+               result[2] = a[2] < 0.0F ? b[2] : c[2];
+               result[3] = a[3] < 0.0F ? b[3] : c[3];
+               store_vector4( inst, machine, result );
+            }
+            break;
          case FP_OPCODE_COS:
             {
                GLfloat a[4], result[4];
@@ -682,6 +706,16 @@ execute_program( GLcontext *ctx,
                store_vector4( inst, machine, result );
             }
             break;
+         case FP_OPCODE_DPH:
+            {
+               GLfloat a[4], b[4], result[4];
+               fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
+               fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
+               result[0] = result[1] = result[2] = result[3] = 
+                  a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + b[3];
+               store_vector4( inst, machine, result );
+            }
+            break;
          case FP_OPCODE_DST: /* Distance vector */
             {
                GLfloat a[4], b[4], result[4];
@@ -952,6 +986,17 @@ execute_program( GLcontext *ctx,
 #endif
             }
             break;
+         case FP_OPCODE_SCS: /* sine and cos */
+            {
+               GLfloat a[4], result[4];
+               fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
+               result[0] = cos(a[0]);
+               result[1] = sin(a[0]);
+               result[2] = 0.0;  /* undefined! */
+               result[3] = 0.0;  /* undefined! */
+               store_vector4( inst, machine, result );
+            }
+            break;
          case FP_OPCODE_SEQ: /* set on equal */
             {
                GLfloat a[4], b[4], result[4];
@@ -1057,6 +1102,11 @@ execute_program( GLcontext *ctx,
                store_vector4( inst, machine, result );
             }
             break;
+         case FP_OPCODE_SWZ:
+            {
+               /* XXX to do: extended swizzle */
+            }
+            break;
          case FP_OPCODE_TEX:
             /* Texel lookup */
             {
@@ -1069,6 +1119,18 @@ execute_program( GLcontext *ctx,
                store_vector4( inst, machine, color );
             }
             break;
+         case FP_OPCODE_TXB:
+            /* Texel lookup with LOD bias */
+            {
+               GLfloat texcoord[4], color[4];
+               fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
+               /* XXX: apply bias from texcoord[3]!!! */
+               fetch_texel( ctx, texcoord,
+                            span->array->lambda[inst->TexSrcUnit][column],
+                            inst->TexSrcUnit, color );
+               store_vector4( inst, machine, color );
+            }
+            break;
          case FP_OPCODE_TXD:
             /* Texture lookup w/ partial derivatives for LOD */
             {
-- 
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