Field Name       Bits   Default Description
DX_ADDR          6:0    0x0     Specifies the location (within the shader pixel stack
                                frame) of the DX value for this instruction
DX_ADDR_REL      7      0x0     Specifies whether the loop register is added to the value
                                of the associated address before it is used. This
                                implements relative addressing.
                                POSSIBLE VALUES:
                                00 - NONE: Do not modify source address
                                01 - RELATIVE: Add aL before lookup.
DX_S_SWIZ        9:8    0x0     Specify which colour channel of dx_addr to use for S
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as S coordinate
                                01 - Use G channel as S coordinate
                                02 - Use B channel as S coordinate
                                03 - Use A channel as S coordinate
DX_T_SWIZ        11:10  0x0     Specify which colour channel of dx_addr to use for T
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as T coordinate
                                01 - Use G channel as T coordinate
                                02 - Use B channel as T coordinate
                                03 - Use A channel as T coordinate
DX_R_SWIZ        13:12  0x0     Specify which colour channel of dx_addr to use for R
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as R coordinate
                                01 - Use G channel as R coordinate
                                02 - Use B channel as R coordinate
                                03 - Use A channel as R coordinate
DX_Q_SWIZ        15:14  0x0     Specify which colour channel of dx_addr to use for Q
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as Q coordinate
                                01 - Use G channel as Q coordinate
                                02 - Use B channel as Q coordinate
                                03 - Use A channel as Q coordinate
DY_ADDR          22:16  0x0     Specifies the location (within the shader pixel stack
                                frame) of the DY value for this instruction
DY_ADDR_REL      23     0x0     Specifies whether the loop register is added to the value
                                of the associated address before it is used. This
                                implements relative addressing.
                                POSSIBLE VALUES:
                                00 - NONE: Do not modify source address
                                01 - RELATIVE: Add aL before lookup.
DY_S_SWIZ        25:24  0x0     Specify which colour channel of dy_addr to use for S
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as S coordinate
                                01 - Use G channel as S coordinate
                                02 - Use B channel as S coordinate
                                03 - Use A channel as S coordinate
DY_T_SWIZ        27:26  0x0     Specify which colour channel of dy_addr to use for T
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as T coordinate
                                01 - Use G channel as T coordinate
                                02 - Use B channel as T coordinate
                                03 - Use A channel as T coordinate
DY_R_SWIZ        29:28  0x0     Specify which colour channel of dy_addr to use for R
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as R coordinate
                                01 - Use G channel as R coordinate
                                02 - Use B channel as R coordinate
                                03 - Use A channel as R coordinate
DY_Q_SWIZ        31:30  0x0     Specify which colour channel of dy_addr to use for Q
                                coordinate
                                POSSIBLE VALUES:
                                00 - Use R channel as Q coordinate
                                01 - Use G channel as Q coordinate
                                02 - Use B channel as Q coordinate
                                03 - Use A channel as Q coordinate
