Revert "r600: fix dst reg indexing"

This reverts commit cc893d9a98.

Richard has the proper fix.

src/mesa/drivers/dri/r600/r700_assembler.c

@@ -2193,7 +2193,6 @@ GLboolean assemble_alu_instruction(r700_AssemblerBase *pAsm)
 GLboolean next_ins(r700_AssemblerBase *pAsm)
 {
     struct prog_instruction *pILInst = &(pAsm->pILInst[pAsm->uiCurInst]);
-    uint index;
 
     if( GL_TRUE == IsTex(pILInst->Opcode) )
     {
@@ -2214,20 +2213,14 @@ GLboolean next_ins(r700_AssemblerBase *pAsm)
       
     if(pAsm->D.dst.rtype == DST_REG_OUT) 
     {
-	    if (pAsm->starting_export_register_number >= pAsm->D.dst.reg) {
-		    index = 0;
-	    } else {
-		    index = pAsm->D.dst.reg - pAsm->starting_export_register_number;
-	    }
-
         if(pAsm->D.dst.op3) 
         {        
             // There is no mask for OP3 instructions, so all channels are written        
-            pAsm->pucOutMask[index] = 0xF;
+            pAsm->pucOutMask[pAsm->D.dst.reg - pAsm->starting_export_register_number] = 0xF;
         }
         else 
         {
-            pAsm->pucOutMask[index]
+            pAsm->pucOutMask[pAsm->D.dst.reg - pAsm->starting_export_register_number] 
                |= (unsigned char)pAsm->pILInst[pAsm->uiCurInst].DstReg.WriteMask;
         }
     }