at.v
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, 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* unpublished proprietary information of Silicon Graphics, Inc., and *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: at.v,v 1.1.1.1 2002/05/17 06:07:44 blythe Exp $
////////////////////////////////////////////////////////////////////////
//
// Project Reality
//
// module: at
// description: Top level for attribute buffers. Primitives data updates
// the cycle before it is needed (via mux), but is only used
// the following cycle. Hardware synchronized attribute data
// is updated the cycle of the attribute (via mux), but is
// only used the following cycle, which lines up with the
// first cycle of a following primitive. QTV will barf on
// this, since it will see the update cycle as not making
// timing, while only the following cycle really matters.
// Unsynchronized attributes update immediately, producing
// trash for one cycle, followed by good data the next cycle.
// The csim should generate garbage (0xDEADBEEF, for example)
// during this trashed update cycle. Some logically synced
// data require no special buffering because the timing
// just works out (scissor, the EW dx's and dy's). Unsynced
// attributes must be maintained by software, using the
// sync_tile and sync_pipe commands after the last primitive
// before any unsynced attribute update commands if necessary.
//
// designer: Phil Gossett
// date: 12/9/94
//
////////////////////////////////////////////////////////////////////////
module at (clk, gclk, reset_l, ew_ep_startspan,
cs_st_prim, cs_st_attr, cs_cmd, cs_ew_d, ew_cs_busy,
ew_addr, ew_length, spanbufrd,
ew_dxr, ew_dxg, ew_dxb, ew_dxa, ew_dxz,
ew_dxs, ew_dxt, ew_dxw, ew_dxl,
ew_dyr, ew_dyg, ew_dyb, ew_dya, ew_dyz,
ew_dys, ew_dyt, ew_dyw, ew_dyl,
st_dxr, st_dxg, st_dxb, st_dxa, st_dxz,
st_dxs, st_dxt, st_dxw, st_dxl,
st_dyr, st_dyg, st_dyb, st_dya, st_dyz, st_ncyc,
color_image, z_image, tex_image, combine_mode,
env_color, prim_color, blend_color, fog_color, fill_color,
other_modes, prim_depth, scissor, convert, key_r, key_gb,
noise, strobe_sync_full,
rel_sync_tile, rel_sync_pipe, rel_sync_load,
ew_image_load, ew_scissor_load, ew_stall_load, ew_offset_load,
tc_load, shift_coord, level, tile, ew_major_sign, ew_offset_sign,
ew_major_left, ew_minor_left, ew_offset_left, cv_left,
st_r_left, st_g_left, st_b_left, st_a_left, st_z_left,
st_s_left, st_t_left, st_w_left, st_l_left,
ms_xi, ms_xf, ms_count, ms_load, ms_load_tlut, ms_xdec, spanbufmt,
ew_stall_tlut, at_cs_busy);
input clk;
input gclk;
input reset_l;
input ew_ep_startspan;
input cs_st_prim;
input cs_st_attr;
input [5:0] cs_cmd;
input [63:0] cs_ew_d;
input ew_cs_busy;
input [19:0] ew_addr;
input [11:0] ew_length;
input spanbufrd;
output [22:0] ew_dxr; // s15.7 (single buffer)
output [22:0] ew_dxg; // s15.7 (single buffer)
output [22:0] ew_dxb; // s15.7 (single buffer)
output [22:0] ew_dxa; // s15.7 (single buffer)
output [22:0] ew_dxz; // s15.7 (single buffer)
output [22:0] ew_dxs; // s15.7 (single buffer)
output [22:0] ew_dxt; // s15.7 (single buffer)
output [22:0] ew_dxw; // s15.7 (single buffer)
output [22:0] ew_dxl; // s15.7 (single buffer)
output [22:0] ew_dyr; // s15.7 (single buffer)
output [22:0] ew_dyg; // s15.7 (single buffer)
output [22:0] ew_dyb; // s15.7 (single buffer)
output [22:0] ew_dya; // s15.7 (single buffer)
output [22:0] ew_dyz; // s15.7 (single buffer)
output [22:0] ew_dys; // s15.7 (single buffer)
output [22:0] ew_dyt; // s15.7 (single buffer)
output [22:0] ew_dyw; // s15.7 (single buffer)
output [22:0] ew_dyl; // s15.7 (single buffer)
output [21:0] st_dxr; // s10.11 (triple buffer)
output [21:0] st_dxg; // s10.11 (triple buffer)
output [21:0] st_dxb; // s10.11 (triple buffer)
output [21:0] st_dxa; // s10.11 (triple buffer)
output [31:0] st_dxz; // s15.16 (triple buffer)
output [26:0] st_dxs; // s15.11 (double buffer)
output [26:0] st_dxt; // s15.11 (double buffer)
output [26:0] st_dxw; // s15.11 (double buffer)
output [26:0] st_dxl; // s15.11 (double buffer)
output [12:0] st_dyr; // s10.2 (double buffer)
output [12:0] st_dyg; // s10.2 (double buffer)
output [12:0] st_dyb; // s10.2 (double buffer)
output [12:0] st_dya; // s10.2 (double buffer)
output [21:0] st_dyz; // s15.6 (double buffer)
output st_ncyc; // ncyc for s,t steppers (load overrides)
output [55:0] color_image; // 3f 55:51, 43:32, 25:0 (unsynced)
output [55:0] z_image; // 3e 25:0 (unsynced)
output [55:0] tex_image; // 3d 55:51, 43:32, 25:0 (unsynced)
output [55:0] combine_mode; // 3c 55:0 (unsynced)
output [55:0] env_color; // 3b 31:0 (unsynced)
output [55:0] prim_color; // 3a 47:40, 39:0 (triple buffer)
output [55:0] blend_color; // 39 31:0 (unsynced)
output [55:0] fog_color; // 38 31:0 (unsynced)
output [55:0] fill_color; // 37 31:0 (unsynced)
output [55:0] other_modes; // 2f 53:0 (unsynced)
output [55:0] prim_depth; // 2e 31:16, 15:0 (triple buffer)
output [55:0] scissor; // 2d 55:32, 25:0 (single buffer)
output [55:0] convert; // 2c 53:0 (unsynced)
output [55:0] key_r; // 2b 27:0 (unsynced)
output [55:0] key_gb; // 2a 55:0 (unsynced)
output [8:0] noise; // pseudo-random noise (shift registers)
output strobe_sync_full; // 29 (counter)
output rel_sync_tile; // 28 (counter)
output rel_sync_pipe; // 27 (counter)
output rel_sync_load; // 31 (counter)
output ew_image_load; // tile(34),block(33),tlut(30) (pipe)
output ew_scissor_load; // tile(34),block(33),tlut(30) (pipe)
output ew_stall_load; // tile(34),block(33),tlut(30) (pipe)
output ew_offset_load; // tile(34),block(33),tlut(30) (pipe)
output tc_load; // tile(34),block(33),tlut(30) (pipe)
output shift_coord; // load_block(33),tlut(34) (triple buffer)
output [2:0] level; // primitives (36,24,25,0f-08) (triple buffer)
output [2:0] tile; // primitives (36,24,25,0f-08) (triple buffer)
output ew_major_sign; // primitives (36,24,25,0f-08) (pipe)
output ew_offset_sign; // primitives (36,24,25,0f-08) (pipe)
output ew_major_left; // primitives (36,24,25,0f-08) (pipe)
output ew_minor_left; // primitives (36,24,25,0f-08) (pipe)
output ew_offset_left; // primitives (36,24,25,0f-08) (pipe)
output cv_left; // primitives (36,24,25,0f-08) (pipe)
output st_r_left; // primitives (36,24,25,0f-08) (pipe)
output st_g_left; // primitives (36,24,25,0f-08) (pipe)
output st_b_left; // primitives (36,24,25,0f-08) (pipe)
output st_a_left; // primitives (36,24,25,0f-08) (pipe)
output st_z_left; // primitives (36,24,25,0f-08) (pipe)
output st_s_left; // primitives (36,24,25,0f-08) (pipe)
output st_t_left; // primitives (36,24,25,0f-08) (pipe)
output st_w_left; // primitives (36,24,25,0f-08) (pipe)
output st_l_left; // primitives (36,24,25,0f-08) (pipe)
output [19:0] ms_xi; // from ew (fifo)
output [11:0] ms_xf; // from ew (fifo)
output [11:0] ms_count; // from ew (fifo)
output ms_load; // tile(34),block(33),tlut(30) (pipe, fifo)
output ms_load_tlut; // tlut(30) (pipe, fifo)
output ms_xdec; // primitives (36,24,25,0f-08) (pipe, fifo)
output spanbufmt; // span fifo empty
output ew_stall_tlut; // tlut(30) (pipe, fifo)
output at_cs_busy; // extended version of ew_cs_busy (counter)
wire ew_scissor_tlut; // tlut(30) (pipe)
at_ew atew ( .gclk(gclk), .reset_l(reset_l), .ncyc(other_modes[52]),
.atomic(other_modes[55]), .ew_ep_startspan(ew_ep_startspan),
.cs_st_prim(cs_st_prim), .cs_st_attr(cs_st_attr),
.cs_cmd(cs_cmd), .cs_ew_d(cs_ew_d), .ew_cs_busy(ew_cs_busy),
.ew_dxr(ew_dxr), .ew_dxg(ew_dxg),
.ew_dxb(ew_dxb), .ew_dxa(ew_dxa), .ew_dxz(ew_dxz),
.ew_dxs(ew_dxs), .ew_dxt(ew_dxt),
.ew_dxw(ew_dxw), .ew_dxl(ew_dxl),
.ew_dyr(ew_dyr), .ew_dyg(ew_dyg),
.ew_dyb(ew_dyb), .ew_dya(ew_dya), .ew_dyz(ew_dyz),
.ew_dys(ew_dys), .ew_dyt(ew_dyt),
.ew_dyw(ew_dyw), .ew_dyl(ew_dyl),
.scissor(scissor), .strobe_sync_full(strobe_sync_full),
.rel_sync_tile(rel_sync_tile), .rel_sync_pipe(rel_sync_pipe),
.rel_sync_load(rel_sync_load),
.ew_image_load(ew_image_load),
.ew_scissor_load(ew_scissor_load),
.ew_stall_load(ew_stall_load),
.ew_offset_load(ew_offset_load),
.tc_load(tc_load), .st_ncyc(st_ncyc),
.ew_major_sign(ew_major_sign), .ew_offset_sign(ew_offset_sign),
.ew_major_left(ew_major_left), .ew_minor_left(ew_minor_left),
.ew_offset_left(ew_offset_left), .cv_left(cv_left),
.st_r_left(st_r_left), .st_g_left(st_g_left),
.st_b_left(st_b_left), .st_a_left(st_a_left),
.st_z_left(st_z_left),
.st_s_left(st_s_left), .st_t_left(st_t_left),
.st_w_left(st_w_left), .st_l_left(st_l_left),
.ew_scissor_tlut(ew_scissor_tlut),
.ew_stall_tlut(ew_stall_tlut),
.at_cs_busy(at_cs_busy));
at_tc attc ( .gclk(gclk), .reset_l(reset_l),
.cs_st_prim(cs_st_prim), .cs_st_attr(cs_st_attr),
.cs_cmd(cs_cmd), .cs_ew_d(cs_ew_d),
.st_dxs(st_dxs), .st_dxt(st_dxt),
.st_dxw(st_dxw), .st_dxl(st_dxl),
.shift_coord(shift_coord), .level(level), .tile(tile));
at_cc atcc ( .gclk(gclk), .reset_l(reset_l),
.cs_st_prim(cs_st_prim), .cs_st_attr(cs_st_attr),
.cs_cmd(cs_cmd), .cs_ew_d(cs_ew_d),
.st_dxr(st_dxr), .st_dxg(st_dxg),
.st_dxb(st_dxb), .st_dxa(st_dxa),
.st_dyr(st_dyr), .st_dyg(st_dyg),
.st_dyb(st_dyb), .st_dya(st_dya),
.combine_mode(combine_mode), .env_color(env_color),
.prim_color(prim_color), .convert(convert),
.key_r(key_r), .key_gb(key_gb), .noise(noise));
at_bl atbl ( .gclk(gclk), .reset_l(reset_l),
.cs_st_prim(cs_st_prim), .cs_st_attr(cs_st_attr),
.cs_cmd(cs_cmd), .cs_ew_d(cs_ew_d),
.st_dxz(st_dxz), .st_dyz(st_dyz),
.color_image(color_image), .z_image(z_image),
.tex_image(tex_image), .blend_color(blend_color),
.fog_color(fog_color), .fill_color(fill_color),
.other_modes(other_modes), .prim_depth(prim_depth));
at_ms atms ( .clk(clk), .gclk(gclk), .reset_l(reset_l),
.ew_ep_startspan(ew_ep_startspan),
.ew_addr(ew_addr), .ew_length(ew_length),
.ew_load(ew_scissor_load), .ew_load_tlut(ew_scissor_tlut),
.ew_left(ew_major_left), .spanbufrd(spanbufrd),
.ms_xi(ms_xi), .ms_xf(ms_xf), .ms_count(ms_count),
.ms_load(ms_load), .ms_load_tlut(ms_load_tlut),
.ms_xdec(ms_xdec), .spanbufmt(spanbufmt));
endmodule // at