1 /* $Id: x86_cliptest.S,v 1.6 2001/03/28 20:44:44 gareth Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 #include "clip_args.h"
30 #define FP_ONE 1065353216
33 #define SRC(i) REGOFF(i * 4, ESI)
34 #define DST(i) REGOFF(i * 4, EDI)
35 #define MAT(i) REGOFF(i * 4, EDX)
39 * Table for clip test.
43 * bit4 = abs(S(2)) > abs(S(3))
45 * bit2 = abs(S(1)) > abs(S(3))
47 * bit0 = abs(S(0)) > abs(S(3))
53 D_BYTE 0, 1, 0, 2, 4, 5, 4, 6
54 D_BYTE 0, 1, 0, 2, 8, 9, 8, 10
55 D_BYTE 32, 33, 32, 34, 36, 37, 36, 38
56 D_BYTE 32, 33, 32, 34, 40, 41, 40, 42
57 D_BYTE 0, 1, 0, 2, 4, 5, 4, 6
58 D_BYTE 0, 1, 0, 2, 8, 9, 8, 10
59 D_BYTE 16, 17, 16, 18, 20, 21, 20, 22
60 D_BYTE 16, 17, 16, 18, 24, 25, 24, 26
61 D_BYTE 63, 61, 63, 62, 55, 53, 55, 54
62 D_BYTE 63, 61, 63, 62, 59, 57, 59, 58
63 D_BYTE 47, 45, 47, 46, 39, 37, 39, 38
64 D_BYTE 47, 45, 47, 46, 43, 41, 43, 42
65 D_BYTE 63, 61, 63, 62, 55, 53, 55, 54
66 D_BYTE 63, 61, 63, 62, 59, 57, 59, 58
67 D_BYTE 31, 29, 31, 30, 23, 21, 23, 22
68 D_BYTE 31, 29, 31, 30, 27, 25, 27, 26
74 * _mesa_x86_cliptest_points4
86 #if defined(__ELF__) && defined(__PIC__) && !defined(ELFPIC)
91 GLOBL GLNAME( _mesa_x86_cliptest_points4 )
92 GLNAME( _mesa_x86_cliptest_points4 ):
95 #define FRAME_OFFSET 20
97 #define FRAME_OFFSET 16
105 /* store pointer to clip_table on stack */
106 CALL( LLBL( ctp4_get_eip ) )
107 ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
108 MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
110 JMP( LLBL( ctp4_clip_table_ready ) )
112 LLBL( ctp4_get_eip ):
113 /* store eip in ebx */
114 MOV_L( REGIND(ESP), EBX )
117 LLBL( ctp4_clip_table_ready ):
120 MOV_L( ARG_SOURCE, ESI )
121 MOV_L( ARG_DEST, EDI )
123 MOV_L( ARG_CLIP, EDX )
126 MOV_L( ARG_AND, EBP )
127 MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
129 MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
130 MOV_L( REGOFF(V4F_START, ESI), ESI )
132 OR_L( CONST(VEC_SIZE_4), REGOFF(V4F_FLAGS, EDI) )
133 MOV_L( EAX, ARG_SOURCE ) /* put stride in ARG_SOURCE */
135 MOV_L( CONST(4), REGOFF(V4F_SIZE, EDI) )
136 MOV_L( ECX, REGOFF(V4F_COUNT, EDI) )
138 MOV_L( REGOFF(V4F_START, EDI), EDI )
141 MOV_L( ECX, ARG_CLIP ) /* put clipmask + count in ARG_CLIP */
144 MOV_B( REGIND(EBX), AL )
145 MOV_B( REGIND(EBP), AH )
147 JZ( LLBL( ctp4_finish ) )
159 ADD_L( EBP, EBP ) /* ebp = abs(S(3))*2 ; carry = sign of S(3) */
162 ADD_L( EBX, EBX ) /* ebx = abs(S(2))*2 ; carry = sign of S(2) */
165 CMP_L( EBX, EBP ) /* carry = abs(S(2))*2 > abs(S(3))*2 */
170 ADD_L( EBX, EBX ) /* ebx = abs(S(1))*2 ; carry = sign of S(1) */
173 CMP_L( EBX, EBP ) /* carry = abs(S(1))*2 > abs(S(3))*2 */
178 ADD_L( EBX, EBX ) /* ebx = abs(S(0))*2 ; carry = sign of S(0) */
181 CMP_L( EBX, EBP ) /* carry = abs(S(0))*2 > abs(S(3))*2 */
186 MOV_L( REGIND(ESP), EBP ) /* clip_table */
188 MOV_B( REGBI(EBP, ECX), CL )
190 MOV_B( REGOFF(clip_table,ECX), CL )
197 MOV_B( CL, REGIND(EDX) )
199 JZ( LLBL( ctp4_proj ) )
202 JMP( LLBL( ctp4_next ) )
206 FLD_S( SRC(0) ) /* F0 F3 */
207 FMUL2( ST(1), ST(0) )
209 FLD_S( SRC(1) ) /* F1 F0 F3 */
210 FMUL2( ST(2), ST(0) )
212 FLD_S( SRC(2) ) /* F2 F1 F0 F3 */
213 FMUL2( ST(3), ST(0) )
215 FXCH( ST(2) ) /* F0 F1 F2 F3 */
216 FSTP_S( DST(0) ) /* F1 F2 F3 */
217 FSTP_S( DST(1) ) /* F2 F3 */
218 FSTP_S( DST(2) ) /* F3 */
219 FSTP_S( DST(3) ) /* */
224 ADD_L( CONST(16), EDI )
226 ADD_L( ARG_SOURCE, ESI )
227 CMP_L( EDX, ARG_CLIP )
229 JNZ( LLBL( ctp4_top ) )
232 MOV_L( ARG_AND, EDX )
234 MOV_B( AL, REGIND(ECX) )
235 MOV_B( AH, REGIND(EDX) )
239 MOV_L( ARG_DEST, EAX )
241 POP_L( ESI ) /* discard ptr to clip_table */
257 GLOBL GLNAME( _mesa_x86_cliptest_points4_np )
258 GLNAME( _mesa_x86_cliptest_points4_np ):
261 #define FRAME_OFFSET 20
263 #define FRAME_OFFSET 16
271 /* store pointer to clip_table on stack */
272 CALL( LLBL( ctp4_np_get_eip ) )
273 ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
274 MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
276 JMP( LLBL( ctp4_np_clip_table_ready ) )
278 LLBL( ctp4_np_get_eip ):
279 /* store eip in ebx */
280 MOV_L( REGIND(ESP), EBX )
283 LLBL( ctp4_np_clip_table_ready ):
286 MOV_L( ARG_SOURCE, ESI )
289 MOV_L( ARG_CLIP, EDX )
292 MOV_L( ARG_AND, EBP )
293 MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
295 MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
296 MOV_L( REGOFF(V4F_START, ESI), ESI )
298 MOV_L( EAX, ARG_DEST ) /* put stride in ARG_DEST */
301 MOV_L( ECX, EDI ) /* put clipmask + count in EDI */
304 MOV_B( REGIND(EBX), AL )
305 MOV_B( REGIND(EBP), AH )
307 JZ( LLBL( ctp4_np_finish ) )
316 ADD_L( EBP, EBP ) /* ebp = abs(S(3))*2 ; carry = sign of S(3) */
319 ADD_L( EBX, EBX ) /* ebx = abs(S(2))*2 ; carry = sign of S(2) */
322 CMP_L( EBX, EBP ) /* carry = abs(S(2))*2 > abs(S(3))*2 */
327 ADD_L( EBX, EBX ) /* ebx = abs(S(1))*2 ; carry = sign of S(1) */
330 CMP_L( EBX, EBP ) /* carry = abs(S(1))*2 > abs(S(3))*2 */
335 ADD_L( EBX, EBX ) /* ebx = abs(S(0))*2 ; carry = sign of S(0) */
338 CMP_L( EBX, EBP ) /* carry = abs(S(0))*2 > abs(S(3))*2 */
343 MOV_L( REGIND(ESP), EBP ) /* clip_table */
345 MOV_B( REGBI(EBP, ECX), CL )
347 MOV_B( REGOFF(clip_table,ECX), CL )
354 MOV_B( CL, REGIND(EDX) )
359 ADD_L( ARG_DEST, ESI )
362 JNZ( LLBL( ctp4_np_top ) )
365 MOV_L( ARG_AND, EDX )
367 MOV_B( AL, REGIND(ECX) )
368 MOV_B( AH, REGIND(EDX) )
370 LLBL( ctp4_np_finish ):
372 MOV_L( ARG_SOURCE, EAX )
374 POP_L( ESI ) /* discard ptr to clip_table */