dll/opengl/mesa/x86/x86_cliptest.S

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  3.5
   5  *
   6  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * NOTE: Avoid using spaces in between '(' ')' and arguments, especially
  28  * with macros like CONST, LLBL that expand to CONCAT(...).  Putting spaces
  29  * in there will break the build on some platforms.
  30  */
  31
  32 #include "assyntax.h"
  33 #include "matypes.h"
  34 #include "clip_args.h"
  35
  36 #define SRC0            REGOFF(0, ESI)
  37 #define SRC1            REGOFF(4, ESI)
  38 #define SRC2            REGOFF(8, ESI)
  39 #define SRC3            REGOFF(12, ESI)
  40 #define DST0            REGOFF(0, EDI)
  41 #define DST1            REGOFF(4, EDI)
  42 #define DST2            REGOFF(8, EDI)
  43 #define DST3            REGOFF(12, EDI)
  44 #define MAT0            REGOFF(0, EDX)
  45 #define MAT1            REGOFF(4, EDX)
  46 #define MAT2            REGOFF(8, EDX)
  47 #define MAT3            REGOFF(12, EDX)
  48
  49
  50 /*
  51  * Table for clip test.
  52  *
  53  *      bit6 = SRC3 < 0
  54  *      bit5 = SRC2 < 0
  55  *      bit4 = abs(S(2)) > abs(S(3))
  56  *      bit3 = SRC1 < 0
  57  *      bit2 = abs(S(1)) > abs(S(3))
  58  *      bit1 = SRC0 < 0
  59  *      bit0 = abs(S(0)) > abs(S(3))
  60  */
  61
  62         SEG_DATA
  63
  64 clip_table:
  65         D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06
  66         D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a
  67         D_BYTE 0x20, 0x21, 0x20, 0x22, 0x24, 0x25, 0x24, 0x26
  68         D_BYTE 0x20, 0x21, 0x20, 0x22, 0x28, 0x29, 0x28, 0x2a
  69         D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06
  70         D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a
  71         D_BYTE 0x10, 0x11, 0x10, 0x12, 0x14, 0x15, 0x14, 0x16
  72         D_BYTE 0x10, 0x11, 0x10, 0x12, 0x18, 0x19, 0x18, 0x1a
  73         D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36
  74         D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a
  75         D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x27, 0x25, 0x27, 0x26
  76         D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x2b, 0x29, 0x2b, 0x2a
  77         D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36
  78         D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a
  79         D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x17, 0x15, 0x17, 0x16
  80         D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x1b, 0x19, 0x1b, 0x1a
  81
  82
  83         SEG_TEXT
  84
  85 /*
  86  * _mesa_x86_cliptest_points4
  87  *
  88  *   AL:  ormask
  89  *   AH:  andmask
  90  *   EBX: temp0
  91  *   ECX: temp1
  92  *   EDX: clipmask[]
  93  *   ESI: clip[]
  94  *   EDI: proj[]
  95  *   EBP: temp2
  96  */
  97
  98 #if defined(__ELF__) && defined(__PIC__) && defined(GNU_ASSEMBLER) && !defined(ELFPIC)
  99 #define ELFPIC
 100 #endif
 101
 102 ALIGNTEXT16
 103 GLOBL GLNAME( _mesa_x86_cliptest_points4 )
 104 HIDDEN(_mesa_x86_cliptest_points4)
 105 GLNAME( _mesa_x86_cliptest_points4 ):
 106
 107 #ifdef ELFPIC
 108 #define FRAME_OFFSET 20
 109 #else
 110 #define FRAME_OFFSET 16
 111 #endif
 112         PUSH_L( ESI )
 113         PUSH_L( EDI )
 114         PUSH_L( EBP )
 115         PUSH_L( EBX )
 116
 117 #ifdef ELFPIC
 118         /* store pointer to clip_table on stack */
 119         CALL( LLBL(ctp4_get_eip) )
 120         ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
 121         MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
 122         PUSH_L( EBX )
 123         JMP( LLBL(ctp4_clip_table_ready) )
 124
 125 LLBL(ctp4_get_eip):
 126         /* store eip in ebx */
 127         MOV_L( REGIND(ESP), EBX )
 128         RET
 129
 130 LLBL(ctp4_clip_table_ready):
 131 #endif
 132
 133         MOV_L( ARG_SOURCE, ESI )
 134         MOV_L( ARG_DEST, EDI )
 135
 136         MOV_L( ARG_CLIP, EDX )
 137         MOV_L( ARG_OR, EBX )
 138
 139         MOV_L( ARG_AND, EBP )
 140         MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
 141
 142         MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
 143         MOV_L( REGOFF(V4F_START, ESI), ESI )
 144
 145         OR_L( CONST(VEC_SIZE_4), REGOFF(V4F_FLAGS, EDI) )
 146         MOV_L( EAX, ARG_SOURCE )        /* put stride in ARG_SOURCE */
 147
 148         MOV_L( CONST(4), REGOFF(V4F_SIZE, EDI) )
 149         MOV_L( ECX, REGOFF(V4F_COUNT, EDI) )
 150
 151         MOV_L( REGOFF(V4F_START, EDI), EDI )
 152         ADD_L( EDX, ECX )
 153
 154         MOV_L( ECX, ARG_CLIP )          /* put clipmask + count in ARG_CLIP */
 155         CMP_L( ECX, EDX )
 156
 157         MOV_B( REGIND(EBX), AL )
 158         MOV_B( REGIND(EBP), AH )
 159
 160         JZ( LLBL(ctp4_finish) )
 161
 162 ALIGNTEXT16
 163 LLBL(ctp4_top):
 164
 165         FLD1                            /* F3 */
 166         FDIV_S( SRC3 )          /* GH: don't care about div-by-zero */
 167
 168         MOV_L( SRC3, EBP )
 169         MOV_L( SRC2, EBX )
 170
 171         XOR_L( ECX, ECX )
 172         ADD_L( EBP, EBP )       /* ebp = abs(S(3))*2 ; carry = sign of S(3) */
 173
 174         ADC_L( ECX, ECX )
 175         ADD_L( EBX, EBX )       /* ebx = abs(S(2))*2 ; carry = sign of S(2) */
 176
 177         ADC_L( ECX, ECX )
 178         CMP_L( EBX, EBP )       /* carry = abs(S(2))*2 > abs(S(3))*2 */
 179
 180         ADC_L( ECX, ECX )
 181         MOV_L( SRC1, EBX )
 182
 183         ADD_L( EBX, EBX )       /* ebx = abs(S(1))*2 ; carry = sign of S(1) */
 184
 185         ADC_L( ECX, ECX )
 186         CMP_L( EBX, EBP )       /* carry = abs(S(1))*2 > abs(S(3))*2 */
 187
 188         ADC_L( ECX, ECX )
 189         MOV_L( SRC0, EBX )
 190
 191         ADD_L( EBX, EBX )       /* ebx = abs(S(0))*2 ; carry = sign of S(0) */
 192
 193         ADC_L( ECX, ECX )
 194         CMP_L( EBX, EBP )       /* carry = abs(S(0))*2 > abs(S(3))*2 */
 195
 196         ADC_L( ECX, ECX )
 197
 198 #ifdef ELFPIC
 199         MOV_L( REGIND(ESP), EBP )       /* clip_table */
 200
 201         MOV_B( REGBI(EBP, ECX), CL )
 202 #else
 203         MOV_B( REGOFF(clip_table,ECX), CL )
 204 #endif
 205
 206         OR_B( CL, AL )
 207         AND_B( CL, AH )
 208
 209         TEST_B( CL, CL )
 210         MOV_B( CL, REGIND(EDX) )
 211
 212         JZ( LLBL(ctp4_proj) )
 213
 214 LLBL(ctp4_noproj):
 215
 216         FSTP( ST(0) )                   /* */
 217
 218         MOV_L( CONST(0), DST0 )
 219         MOV_L( CONST(0), DST1 )
 220         MOV_L( CONST(0), DST2 )
 221         MOV_L( CONST(0x3f800000), DST3 )
 222
 223         JMP( LLBL(ctp4_next) )
 224
 225 LLBL(ctp4_proj):
 226
 227         FLD_S( SRC0 )                   /* F0 F3 */
 228         FMUL2( ST(1), ST0 )
 229
 230         FLD_S( SRC1 )                   /* F1 F0 F3 */
 231         FMUL2( ST(2), ST0 )
 232
 233         FLD_S( SRC2 )                   /* F2 F1 F0 F3 */
 234         FMUL2( ST(3), ST0 )
 235
 236         FXCH( ST(2) )                   /* F0 F1 F2 F3 */
 237         FSTP_S( DST0 )          /* F1 F2 F3 */
 238         FSTP_S( DST1 )          /* F2 F3 */
 239         FSTP_S( DST2 )          /* F3 */
 240         FSTP_S( DST3 )          /* */
 241
 242 LLBL(ctp4_next):
 243
 244         INC_L( EDX )
 245         ADD_L( CONST(16), EDI )
 246
 247         ADD_L( ARG_SOURCE, ESI )
 248         CMP_L( EDX, ARG_CLIP )
 249
 250         JNZ( LLBL(ctp4_top) )
 251
 252         MOV_L( ARG_OR, ECX )
 253         MOV_L( ARG_AND, EDX )
 254
 255         MOV_B( AL, REGIND(ECX) )
 256         MOV_B( AH, REGIND(EDX) )
 257
 258 LLBL(ctp4_finish):
 259
 260         MOV_L( ARG_DEST, EAX )
 261 #ifdef ELFPIC
 262         POP_L( ESI )                    /* discard ptr to clip_table */
 263 #endif
 264         POP_L( EBX )
 265         POP_L( EBP )
 266         POP_L( EDI )
 267         POP_L( ESI )
 268
 269         RET
 270
 271
 272
 273
 274
 275
 276
 277 ALIGNTEXT16
 278 GLOBL GLNAME( _mesa_x86_cliptest_points4_np )
 279 HIDDEN(_mesa_x86_cliptest_points4_np)
 280 GLNAME( _mesa_x86_cliptest_points4_np ):
 281
 282 #ifdef ELFPIC
 283 #define FRAME_OFFSET 20
 284 #else
 285 #define FRAME_OFFSET 16
 286 #endif
 287         PUSH_L( ESI )
 288         PUSH_L( EDI )
 289         PUSH_L( EBP )
 290         PUSH_L( EBX )
 291
 292 #ifdef ELFPIC
 293         /* store pointer to clip_table on stack */
 294         CALL( LLBL(ctp4_np_get_eip) )
 295         ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
 296         MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
 297         PUSH_L( EBX )
 298         JMP( LLBL(ctp4_np_clip_table_ready) )
 299
 300 LLBL(ctp4_np_get_eip):
 301         /* store eip in ebx */
 302         MOV_L( REGIND(ESP), EBX )
 303         RET
 304
 305 LLBL(ctp4_np_clip_table_ready):
 306 #endif
 307
 308         MOV_L( ARG_SOURCE, ESI )
 309         /* slot */
 310
 311         MOV_L( ARG_CLIP, EDX )
 312         MOV_L( ARG_OR, EBX )
 313
 314         MOV_L( ARG_AND, EBP )
 315         MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
 316
 317         MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
 318         MOV_L( REGOFF(V4F_START, ESI), ESI )
 319
 320         MOV_L( EAX, ARG_DEST )          /* put stride in ARG_DEST */
 321         ADD_L( EDX, ECX )
 322
 323         MOV_L( ECX, EDI )               /* put clipmask + count in EDI */
 324         CMP_L( ECX, EDX )
 325
 326         MOV_B( REGIND(EBX), AL )
 327         MOV_B( REGIND(EBP), AH )
 328
 329         JZ( LLBL(ctp4_np_finish) )
 330
 331 ALIGNTEXT16
 332 LLBL(ctp4_np_top):
 333
 334         MOV_L( SRC3, EBP )
 335         MOV_L( SRC2, EBX )
 336
 337         XOR_L( ECX, ECX )
 338         ADD_L( EBP, EBP )       /* ebp = abs(S(3))*2 ; carry = sign of S(3) */
 339
 340         ADC_L( ECX, ECX )
 341         ADD_L( EBX, EBX )       /* ebx = abs(S(2))*2 ; carry = sign of S(2) */
 342
 343         ADC_L( ECX, ECX )
 344         CMP_L( EBX, EBP )       /* carry = abs(S(2))*2 > abs(S(3))*2 */
 345
 346         ADC_L( ECX, ECX )
 347         MOV_L( SRC1, EBX )
 348
 349         ADD_L( EBX, EBX )       /* ebx = abs(S(1))*2 ; carry = sign of S(1) */
 350
 351         ADC_L( ECX, ECX )
 352         CMP_L( EBX, EBP )       /* carry = abs(S(1))*2 > abs(S(3))*2 */
 353
 354         ADC_L( ECX, ECX )
 355         MOV_L( SRC0, EBX )
 356
 357         ADD_L( EBX, EBX )       /* ebx = abs(S(0))*2 ; carry = sign of S(0) */
 358
 359         ADC_L( ECX, ECX )
 360         CMP_L( EBX, EBP )       /* carry = abs(S(0))*2 > abs(S(3))*2 */
 361
 362         ADC_L( ECX, ECX )
 363
 364 #ifdef ELFPIC
 365         MOV_L( REGIND(ESP), EBP )       /* clip_table */
 366
 367         MOV_B( REGBI(EBP, ECX), CL )
 368 #else
 369         MOV_B( REGOFF(clip_table,ECX), CL )
 370 #endif
 371
 372         OR_B( CL, AL )
 373         AND_B( CL, AH )
 374
 375         TEST_B( CL, CL )
 376         MOV_B( CL, REGIND(EDX) )
 377
 378         INC_L( EDX )
 379         /* slot */
 380
 381         ADD_L( ARG_DEST, ESI )
 382         CMP_L( EDX, EDI )
 383
 384         JNZ( LLBL(ctp4_np_top) )
 385
 386         MOV_L( ARG_OR, ECX )
 387         MOV_L( ARG_AND, EDX )
 388
 389         MOV_B( AL, REGIND(ECX) )
 390         MOV_B( AH, REGIND(EDX) )
 391
 392 LLBL(ctp4_np_finish):
 393
 394         MOV_L( ARG_SOURCE, EAX )
 395 #ifdef ELFPIC
 396         POP_L( ESI )                    /* discard ptr to clip_table */
 397 #endif
 398         POP_L( EBX )
 399         POP_L( EBP )
 400         POP_L( EDI )
 401         POP_L( ESI )
 402
 403         RET
 404
 405 #if defined (__ELF__) && defined (__linux__)
 406         .section .note.GNU-stack,"",%progbits
 407 #endif