From 4099bb76148007f9ccb6c86838b2bf37ea42de56 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Fri, 11 Sep 2009 11:07:58 -0400
Subject: [PATCH] r600: support tex coords from constants

Fixes neverball among other things.
---
 src/mesa/drivers/dri/r600/r700_assembler.c | 62 ++++++----------------
 1 file changed, 17 insertions(+), 45 deletions(-)

diff --git a/src/mesa/drivers/dri/r600/r700_assembler.c b/src/mesa/drivers/dri/r600/r700_assembler.c
index 2d8480daaf7..19ba87001f4 100644
--- a/src/mesa/drivers/dri/r600/r700_assembler.c
+++ b/src/mesa/drivers/dri/r600/r700_assembler.c
@@ -1149,17 +1149,19 @@ GLboolean tex_dst(r700_AssemblerBase *pAsm)
 GLboolean tex_src(r700_AssemblerBase *pAsm)
 {
     struct prog_instruction *pILInst = &(pAsm->pILInst[pAsm->uiCurInst]);
- 
-    GLboolean bValidTexCoord = GL_FALSE;
 
     switch (pILInst->SrcReg[0].File)
     {
     case PROGRAM_TEMPORARY:
-        bValidTexCoord = GL_TRUE;
-
         pAsm->S[0].src.reg   = pILInst->SrcReg[0].Index + pAsm->starting_temp_register_number;
         pAsm->S[0].src.rtype = SRC_REG_TEMPORARY;
-
+        break;
+    case PROGRAM_CONSTANT:
+    case PROGRAM_LOCAL_PARAM:
+    case PROGRAM_ENV_PARAM:
+    case PROGRAM_STATE_VAR:
+        pAsm->S[0].src.reg   = pILInst->SrcReg[0].Index;
+        pAsm->S[0].src.rtype = SRC_REG_CONSTANT;
         break;
     case PROGRAM_INPUT:
         switch (pILInst->SrcReg[0].Index)
@@ -1174,23 +1176,13 @@ GLboolean tex_src(r700_AssemblerBase *pAsm)
         case FRAG_ATTRIB_TEX5:
         case FRAG_ATTRIB_TEX6:
         case FRAG_ATTRIB_TEX7:
-            bValidTexCoord = GL_TRUE;
-
             pAsm->S[0].src.reg   = pAsm->uiFP_AttributeMap[pILInst->SrcReg[0].Index];
             pAsm->S[0].src.rtype = SRC_REG_INPUT;
         }
         break;
     }
 
-    if(GL_TRUE == bValidTexCoord)
-    { 
-        setaddrmode_PVSSRC(&(pAsm->S[0].src), ADDR_ABSOLUTE);
-    }
-    else
-    {
-        radeon_error("Invalid source texcoord for TEX instruction\n");
-        return GL_FALSE;
-    }
+    setaddrmode_PVSSRC(&(pAsm->S[0].src), ADDR_ABSOLUTE);
 
     pAsm->S[0].src.swizzlex = pILInst->SrcReg[0].Swizzle & 0x7;
     pAsm->S[0].src.swizzley = (pILInst->SrcReg[0].Swizzle >> 3) & 0x7;
@@ -1201,7 +1193,7 @@ GLboolean tex_src(r700_AssemblerBase *pAsm)
     pAsm->S[0].src.negy = (pILInst->SrcReg[0].Negate >> 1) & 0x1;
     pAsm->S[0].src.negz = (pILInst->SrcReg[0].Negate >> 2) & 0x1;
     pAsm->S[0].src.negw = (pILInst->SrcReg[0].Negate >> 3) & 0x1;
-     
+
     return GL_TRUE;
 }
 
@@ -3362,39 +3354,19 @@ GLboolean assemble_STP(r700_AssemblerBase *pAsm)
 {
     return GL_TRUE;
 }
- 
-GLboolean assemble_TEX(r700_AssemblerBase *pAsm) 
-{
-    GLboolean src_const;
-
-    switch (pAsm->pILInst[pAsm->uiCurInst].SrcReg[0].File)
-    {
-    case PROGRAM_CONSTANT:
-    case PROGRAM_LOCAL_PARAM:
-    case PROGRAM_ENV_PARAM:
-    case PROGRAM_STATE_VAR:
-        src_const = GL_TRUE;
-    case PROGRAM_TEMPORARY:
-    case PROGRAM_INPUT:
-        src_const = GL_FALSE;
-    }
 
-    if (GL_TRUE == src_const) 
-    {
-        radeon_error("TODO: Texture coordinates from a constant register not supported.\n");
-        return GL_FALSE;
-    }
-
-    switch (pAsm->pILInst[pAsm->uiCurInst].Opcode) 
+GLboolean assemble_TEX(r700_AssemblerBase *pAsm)
+{
+    switch (pAsm->pILInst[pAsm->uiCurInst].Opcode)
     {
         case OPCODE_TEX:
-            pAsm->D.dst.opcode = SQ_TEX_INST_SAMPLE;            
+            pAsm->D.dst.opcode = SQ_TEX_INST_SAMPLE;
             break;
-        case OPCODE_TXB:            
+        case OPCODE_TXB:
             radeon_error("do not support TXB yet\n");
             return GL_FALSE;
             break;
-        case OPCODE_TXP:            
+        case OPCODE_TXP:
             /* TODO : tex proj version : divid first 3 components by 4th */ 
             pAsm->D.dst.opcode = SQ_TEX_INST_SAMPLE;
             break;
@@ -3418,13 +3390,13 @@ GLboolean assemble_TEX(r700_AssemblerBase *pAsm)
     {
         return GL_FALSE;
     }
- 
+
     if( GL_FALSE == tex_src(pAsm) )
     {
         return GL_FALSE;
     }
 
-    if ( GL_FALSE == next_ins(pAsm) ) 
+    if ( GL_FALSE == next_ins(pAsm) )
     {
         return GL_FALSE;
     }
-- 
2.30.2