src/mesa/x86/x86_cliptest.S

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