AMD ATI CTM, Техническое справочное руководство

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Conditional Output Unit Commands 21
© 2006 Advanced Micro Devices, Inc. ATI CTM Guide v. 1.01
Parameter 0:
Set Output Write Mask Command
The
set_out_mask
command takes a single parameter, a bitfield specifying which channels in an output write
request are passed through to memory. If the bit is zero, the corresponding channel of the output data is ignored. The
specified mask is active until the next
set_out_mask
command is received.
Parameter 0: writemask
Set Conditional Output Mask Command
The set_cond_out_mask command takes a single parameter that specifies whether the conditional output result is
written to the conditional output buffer. If the mask is 1, then the output value is written to the buffer. If it is 0, then
the output value is not written to the buffer. The mask is maintained until the next
set_cond_out_mask command.
Parameter 0: writemask
2.2.3 Conditional Output Unit Commands
This section contains all CTM commands for the Conditional Output Unit (CO).
Set Conditional Test Command
The set_cond_test command takes a single parameter, which specifies the test condition that the CO will perform.
This test is active until the next set_cond_test command is received.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bits Field Name Description
31:0 Reserved Reserved
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
c3 c2 c1 c0
Bits Field Name Description
0 channel 0 writemask If 1, then write channel 0 of output data upon request; if 0, do not write
1 channel 1 writemask If 1, then write channel 1 of output data upon request; if 0, do not write
2 channel 2 writemask If 1, then write channel 2 of output data upon request; if 0, do not write
3 channel 3 writemask If 1, then write channel 3 of output data upon request; if 0, do not write
31:4 Reserved Reserved
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
w
Bits Field Name Description
0 writemask If 1, then write the conditional value to the conditional output buffer; if 0, do
not write
31:1 Reserved Reserved