Games/Quake/d_varsa.s

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 //
  21 // d_varsa.s
  22 //
  23
  24 #include "asm_i386.h"
  25 #include "quakeasm.h"
  26 #include "asm_draw.h"
  27 #include "d_ifacea.h"
  28
  29 #if     id386
  30
  31         .data
  32
  33 //-------------------------------------------------------
  34 // global refresh variables
  35 //-------------------------------------------------------
  36
  37 // FIXME: put all refresh variables into one contiguous block. Make into one
  38 // big structure, like cl or sv?
  39
  40         .align  4
  41 .globl  C(d_sdivzstepu)
  42 .globl  C(d_tdivzstepu)
  43 .globl  C(d_zistepu)
  44 .globl  C(d_sdivzstepv)
  45 .globl  C(d_tdivzstepv)
  46 .globl  C(d_zistepv)
  47 .globl  C(d_sdivzorigin)
  48 .globl  C(d_tdivzorigin)
  49 .globl  C(d_ziorigin)
  50 C(d_sdivzstepu):        .single 0
  51 C(d_tdivzstepu):        .single 0
  52 C(d_zistepu):           .single 0
  53 C(d_sdivzstepv):        .single 0
  54 C(d_tdivzstepv):        .single 0
  55 C(d_zistepv):           .single 0
  56 C(d_sdivzorigin):       .single 0
  57 C(d_tdivzorigin):       .single 0
  58 C(d_ziorigin):          .single 0
  59
  60 .globl  C(sadjust)
  61 .globl  C(tadjust)
  62 .globl  C(bbextents)
  63 .globl  C(bbextentt)
  64 C(sadjust):                     .long   0
  65 C(tadjust):                     .long   0
  66 C(bbextents):           .long   0
  67 C(bbextentt):           .long   0
  68
  69 .globl  C(cacheblock)
  70 .globl  C(d_viewbuffer)
  71 .globl  C(cachewidth)
  72 .globl  C(d_pzbuffer)
  73 .globl  C(d_zrowbytes)
  74 .globl  C(d_zwidth)
  75 C(cacheblock):          .long   0
  76 C(cachewidth):          .long   0
  77 C(d_viewbuffer):        .long   0
  78 C(d_pzbuffer):          .long   0
  79 C(d_zrowbytes):         .long   0
  80 C(d_zwidth):            .long   0
  81
  82
  83 //-------------------------------------------------------
  84 // ASM-only variables
  85 //-------------------------------------------------------
  86 .globl  izi
  87 izi:                    .long   0
  88
  89 .globl  pbase, s, t, sfracf, tfracf, snext, tnext
  90 .globl  spancountminus1, zi16stepu, sdivz16stepu, tdivz16stepu
  91 .globl  zi8stepu, sdivz8stepu, tdivz8stepu, pz
  92 s:                              .long   0
  93 t:                              .long   0
  94 snext:                  .long   0
  95 tnext:                  .long   0
  96 sfracf:                 .long   0
  97 tfracf:                 .long   0
  98 pbase:                  .long   0
  99 zi8stepu:               .long   0
 100 sdivz8stepu:    .long   0
 101 tdivz8stepu:    .long   0
 102 zi16stepu:              .long   0
 103 sdivz16stepu:   .long   0
 104 tdivz16stepu:   .long   0
 105 spancountminus1: .long  0
 106 pz:                             .long   0
 107
 108 .globl  izistep
 109 izistep:                                .long   0
 110
 111 //-------------------------------------------------------
 112 // local variables for d_draw16.s
 113 //-------------------------------------------------------
 114
 115 .globl  reciprocal_table_16, entryvec_table_16
 116 // 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8, 1/9, 1/10, 1/11, 1/12, 1/13,
 117 // 1/14, and 1/15 in 0.32 form
 118 reciprocal_table_16:    .long   0x40000000, 0x2aaaaaaa, 0x20000000
 119                                                 .long   0x19999999, 0x15555555, 0x12492492
 120                                                 .long   0x10000000, 0xe38e38e, 0xccccccc, 0xba2e8ba
 121                                                 .long   0xaaaaaaa, 0x9d89d89, 0x9249249, 0x8888888
 122
 123 #ifndef NeXT
 124         .extern Entry2_16
 125         .extern Entry3_16
 126         .extern Entry4_16
 127         .extern Entry5_16
 128         .extern Entry6_16
 129         .extern Entry7_16
 130         .extern Entry8_16
 131         .extern Entry9_16
 132         .extern Entry10_16
 133         .extern Entry11_16
 134         .extern Entry12_16
 135         .extern Entry13_16
 136         .extern Entry14_16
 137         .extern Entry15_16
 138         .extern Entry16_16
 139 #endif
 140
 141 entryvec_table_16:      .long   0, Entry2_16, Entry3_16, Entry4_16
 142                                         .long   Entry5_16, Entry6_16, Entry7_16, Entry8_16
 143                                         .long   Entry9_16, Entry10_16, Entry11_16, Entry12_16
 144                                         .long   Entry13_16, Entry14_16, Entry15_16, Entry16_16
 145
 146 //-------------------------------------------------------
 147 // local variables for d_parta.s
 148 //-------------------------------------------------------
 149 .globl  DP_Count, DP_u, DP_v, DP_32768, DP_Color, DP_Pix, DP_EntryTable
 150 DP_Count:               .long   0
 151 DP_u:                   .long   0
 152 DP_v:                   .long   0
 153 DP_32768:               .single 32768.0
 154 DP_Color:               .long   0
 155 DP_Pix:                 .long   0
 156
 157
 158 #ifndef NeXT
 159         .extern DP_1x1
 160         .extern DP_2x2
 161         .extern DP_3x3
 162         .extern DP_4x4
 163 #endif
 164
 165 DP_EntryTable:  .long   DP_1x1, DP_2x2, DP_3x3, DP_4x4
 166
 167 //
 168 // advancetable is 8 bytes, but points to the middle of that range so negative
 169 // offsets will work
 170 //
 171 .globl  advancetable, sstep, tstep, pspantemp, counttemp, jumptemp
 172 advancetable:   .long   0, 0
 173 sstep:                  .long   0
 174 tstep:                  .long   0
 175
 176 pspantemp:              .long   0
 177 counttemp:              .long   0
 178 jumptemp:               .long   0
 179
 180 // 1/2, 1/3, 1/4, 1/5, 1/6, and 1/7 in 0.32 form
 181 .globl  reciprocal_table, entryvec_table
 182 reciprocal_table:       .long   0x40000000, 0x2aaaaaaa, 0x20000000
 183                                         .long   0x19999999, 0x15555555, 0x12492492
 184
 185 #ifndef NeXT
 186         .extern Entry2_8
 187         .extern Entry3_8
 188         .extern Entry4_8
 189         .extern Entry5_8
 190         .extern Entry6_8
 191         .extern Entry7_8
 192         .extern Entry8_8
 193 #endif
 194
 195 entryvec_table: .long   0, Entry2_8, Entry3_8, Entry4_8
 196                                 .long   Entry5_8, Entry6_8, Entry7_8, Entry8_8
 197
 198 #ifndef NeXT
 199         .extern Spr8Entry2_8
 200         .extern Spr8Entry3_8
 201         .extern Spr8Entry4_8
 202         .extern Spr8Entry5_8
 203         .extern Spr8Entry6_8
 204         .extern Spr8Entry7_8
 205         .extern Spr8Entry8_8
 206 #endif
 207
 208 .globl spr8entryvec_table
 209 spr8entryvec_table:     .long   0, Spr8Entry2_8, Spr8Entry3_8, Spr8Entry4_8
 210                                         .long   Spr8Entry5_8, Spr8Entry6_8, Spr8Entry7_8, Spr8Entry8_8
 211
 212 #endif  // id386
 213