cspartdec.v
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphic, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
*************************************************************************/
// $Id: cspartdec.v,v 1.1.1.1 2002/05/17 06:07:45 blythe Exp $
/////////////////////////////////////////////////////////////////////////
//
// Project Reality
//
// module: cspartdec
// description: partial decode directly from fifo
//
//
// designer: Mike M. Cai 10/5/94
//
/////////////////////////////////////////////////////////////////////////
module cspartdec( // outputs
sync_tile, sync_pipe, sync_full, sync_load,
one_word_cmd,
size_prim,
// inputs
fifo_out_cmd, state_zero
);
output sync_tile, sync_pipe, sync_full, sync_load;
output one_word_cmd;
output [4:0] size_prim;
input [5:0] fifo_out_cmd;
input state_zero;
reg [4:0] size_prim;
reg sync_tile, sync_pipe, sync_full, sync_load;
reg one_word_cmd;
`include "rdpcmd.vh"
always @(fifo_out_cmd or state_zero)
begin
sync_tile = 1'h0;
sync_pipe = 1'h0;
sync_full = 1'h0;
sync_load = 1'h0;
one_word_cmd = 1'h0;
if ( state_zero )
case (fifo_out_cmd)
fullsync:
begin
sync_full = 1'h1;
one_word_cmd = 1'h1;
end
tilesync:
begin
sync_tile = 1'h1;
one_word_cmd = 1'h1;
end
pipesync:
begin
sync_pipe = 1'h1;
one_word_cmd = 1'h1;
end
loadsync:
begin
sync_load = 1'h1;
one_word_cmd = 1'h1;
end
setblendcolor, setfogcolor, setfillcolor, setscissor, setconvert,
setkeyr, setkeygb, setrdpother, setprimdepth, noop:
begin
one_word_cmd = 1'h1;
end
settile, settilesize:
begin
one_word_cmd = 1'h1;
end
loadtile, loadblock, loadtlut,
texrect, texrectflip, fillrect,
trifill, trishade, tritxtr, trishadetxtr, trifillzbuff,
trishadezbuff, tritxtrzbuff, trishadetxtrzbuff:
begin
one_word_cmd = 1'h0;
end
default:
begin
one_word_cmd = 1'h1;
end
endcase
end
always @(fifo_out_cmd)
case (fifo_out_cmd)
texrect:
begin
size_prim = 5'h2;
end
texrectflip:
begin
size_prim = 5'h2;
end
trifill:
begin
size_prim = 5'h4;
end
trishade:
begin
size_prim = 5'hc;
end
tritxtr:
begin
size_prim = 5'hc;
end
trishadetxtr:
begin
size_prim = 5'h14;
end
trifillzbuff:
begin
size_prim = 5'h6;
end
trishadezbuff:
begin
size_prim = 5'he;
end
tritxtrzbuff:
begin
size_prim = 5'he;
end
trishadetxtrzbuff:
begin
size_prim = 5'h16;
end
fillrect:
begin
size_prim = 5'h1;
end
loadtile, loadblock, loadtlut:
begin
size_prim = 5'h1;
end
default:
begin
size_prim = 1'h1;
end
endcase
endmodule // c spartdec