void UpdateRegisterWriteState( PhaseType phase )
{
int reg_offset = opParams[ 0 ].Arg - Gl.GL_REG_0_ATI;
switch ( phase )
{
case PhaseType.PHASE1TEX:
case PhaseType.PHASE1ALU:
Phase_RegisterUsage[ reg_offset ].Phase1Write = true;
break;
case PhaseType.PHASE2TEX:
case PhaseType.PHASE2ALU:
Phase_RegisterUsage[ reg_offset ].Phase2Write = true;
break;
} // end switch(phase)
}