diff options
Diffstat (limited to 'src/mesa/x86/x86_cliptest.S')
| -rw-r--r-- | src/mesa/x86/x86_cliptest.S | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/mesa/x86/x86_cliptest.S b/src/mesa/x86/x86_cliptest.S new file mode 100644 index 00000000000..b1dd844b7ba --- /dev/null +++ b/src/mesa/x86/x86_cliptest.S @@ -0,0 +1,248 @@ +/* $Id: x86_cliptest.S,v 1.2 2000/10/23 00:16:28 gareth Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.5 + * + * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "assyntax.h" +#include "clip_args.h" + +#define FP_ONE 1065353216 +#define FP_ZERO 0 + +#define SRC(i) REGOFF(i * 4, ESI) +#define DST(i) REGOFF(i * 4, EDI) +#define MAT(i) REGOFF(i * 4, EDX) + + +/* + * Table for clip test. + * + * bit6 = SRC(3) < 0 + * bit5 = SRC(2) < 0 + * bit4 = abs(S(2)) > abs(S(3)) + * bit3 = SRC(1) < 0 + * bit2 = abs(S(1)) > abs(S(3)) + * bit1 = SRC(0) < 0 + * bit0 = abs(S(0)) > abs(S(3)) + */ + + SEG_DATA + +clip_table: + D_BYTE 0, 1, 0, 2, 4, 5, 4, 6 + D_BYTE 0, 1, 0, 2, 8, 9, 8, 10 + D_BYTE 32, 33, 32, 34, 36, 37, 36, 38 + D_BYTE 32, 33, 32, 34, 40, 41, 40, 42 + D_BYTE 0, 1, 0, 2, 4, 5, 4, 6 + D_BYTE 0, 1, 0, 2, 8, 9, 8, 10 + D_BYTE 16, 17, 16, 18, 20, 21, 20, 22 + D_BYTE 16, 17, 16, 18, 24, 25, 24, 26 + D_BYTE 63, 61, 63, 62, 55, 53, 55, 54 + D_BYTE 63, 61, 63, 62, 59, 57, 59, 58 + D_BYTE 47, 45, 47, 46, 39, 37, 39, 38 + D_BYTE 47, 45, 47, 46, 43, 41, 43, 42 + D_BYTE 63, 61, 63, 62, 55, 53, 55, 54 + D_BYTE 63, 61, 63, 62, 59, 57, 59, 58 + D_BYTE 31, 29, 31, 30, 23, 21, 23, 22 + D_BYTE 31, 29, 31, 30, 27, 25, 27, 26 + + + SEG_TEXT + +/* + * gl_x86_cliptest_points4 + * + * AL: ormask + * AH: andmask + * EBX: temp0 + * ECX: temp1 + * EDX: clipmask[] + * ESI: clip[] + * EDI: proj[] + * EBP: temp2 + */ + +#if defined(__ELF__) && defined(__PIC__) && !defined(ELFPIC) +#define ELFPIC +#endif + +ALIGNTEXT16 +GLOBL GLNAME( gl_x86_cliptest_points4 ) +GLNAME( gl_x86_cliptest_points4 ): + +#ifdef ELFPIC +#define FRAME_OFFSET 20 +#else +#define FRAME_OFFSET 16 +#endif + PUSH_L( ESI ) + PUSH_L( EDI ) + PUSH_L( EBP ) + PUSH_L( EBX ) + +#ifdef ELFPIC + /* store pointer to clip_table on stack */ + CALL( LLBL( ctp4_get_eip ) ) + ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX ) + MOV_L( REGOFF(clip_table@GOT, EBX), EBX ) + PUSH_L( EBX ) + JMP( LLBL( ctp4_clip_table_ready ) ) + +LLBL( ctp4_get_eip ): + /* store eip in ebx */ + MOV_L( REGIND(ESP), EBX ) + RET + +LLBL( ctp4_clip_table_ready ): +#endif + + MOV_L( ARG_SOURCE, ESI ) + MOV_L( ARG_DEST, EDI ) + + MOV_L( ARG_CLIP, EDX ) + MOV_L( ARG_OR, EBX ) + + MOV_L( ARG_AND, EBP ) + MOV_L( REGOFF(V4F_STRIDE, ESI), EAX ) + + MOV_L( REGOFF(V4F_COUNT, ESI), ECX ) + MOV_L( REGOFF(V4F_START, ESI), ESI ) + + OR_L( CONST(VEC_SIZE_4), REGOFF(V4F_FLAGS, EDI) ) + MOV_L( EAX, ARG_SOURCE ) /* put stride in ARG_SOURCE */ + + MOV_L( CONST(3), REGOFF(V4F_SIZE, EDI) ) + MOV_L( ECX, REGOFF(V4F_COUNT, EDI) ) + + MOV_L( REGOFF(V4F_START, EDI), EDI ) + ADD_L( EDX, ECX ) + + MOV_L( ECX, ARG_CLIP ) /* put clipmask + count in ARG_CLIP */ + CMP_L( ECX, EDX ) + + MOV_B( REGIND(EBX), AL ) + MOV_B( REGIND(EBP), AH ) + + JZ( LLBL( ctp4_finish ) ) + +ALIGNTEXT16 +LLBL( ctp4_top ): + + FLD1 /* F3 */ + FDIV_S( SRC(3) ) + + MOV_L( SRC(3), EBP ) + MOV_L( SRC(2), EBX ) + + XOR_L( ECX, ECX ) + ADD_L( EBP, EBP ) /* ebp = abs(S(3))*2 ; carry = sign of S(3) */ + + ADC_L( ECX, ECX ) + ADD_L( EBX, EBX ) /* ebx = abs(S(2))*2 ; carry = sign of S(2) */ + + ADC_L( ECX, ECX ) + CMP_L( EBX, EBP ) /* carry = abs(S(2))*2 > abs(S(3))*2 */ + + ADC_L( ECX, ECX ) + MOV_L( SRC(1), EBX ) + + ADD_L( EBX, EBX ) /* ebx = abs(S(1))*2 ; carry = sign of S(1) */ + + ADC_L( ECX, ECX ) + CMP_L( EBX, EBP ) /* carry = abs(S(1))*2 > abs(S(3))*2 */ + + ADC_L( ECX, ECX ) + MOV_L( SRC(0), EBX ) + + ADD_L( EBX, EBX ) /* ebx = abs(S(0))*2 ; carry = sign of S(0) */ + + ADC_L( ECX, ECX ) + CMP_L( EBX, EBP ) /* carry = abs(S(0))*2 > abs(S(3))*2 */ + + ADC_L( ECX, ECX ) + +#ifdef ELFPIC + MOV_L( REGIND(ESP), EBP ) /* clip_table */ + + MOV_B( REGBI(EBP, ECX), CL ) +#else + MOV_B( REGOFF(clip_table,ECX), CL ) +#endif + + OR_B( CL, AL ) + AND_B( CL, AH ) + + TEST_B( CL, CL ) + MOV_B( CL, REGIND(EDX) ) + + JZ( LLBL( ctp4_proj ) ) + + FSTP( ST(0) ) /* */ + JMP( LLBL( ctp4_next ) ) + +LLBL( ctp4_proj ): + + FLD_S( SRC(0) ) /* F0 F3 */ + FMUL2( ST(1), ST(0) ) + + FLD_S( SRC(1) ) /* F1 F0 F3 */ + FMUL2( ST(2), ST(0) ) + + FLD_S( SRC(2) ) /* F2 F1 F0 F3 */ + FMUL2( ST(3), ST(0) ) + + FXCH( ST(2) ) /* F0 F1 F2 F3 */ + FSTP_S( DST(0) ) /* F1 F2 F3 */ + FSTP_S( DST(1) ) /* F2 F3 */ + FSTP_S( DST(2) ) /* F3 */ + FSTP_S( DST(3) ) /* */ + +LLBL( ctp4_next ): + + INC_L( EDX ) + ADD_L( CONST(16), EDI ) + + ADD_L( ARG_SOURCE, ESI ) + CMP_L( EDX, ARG_CLIP ) + + JNZ( LLBL( ctp4_top ) ) + + MOV_L( ARG_OR, ECX ) + MOV_L( ARG_AND, EDX ) + + MOV_B( AL, REGIND(ECX) ) + MOV_B( AH, REGIND(EDX) ) + +LLBL( ctp4_finish ): + + MOV_L( ARG_DEST, EAX ) +#ifdef ELFPIC + POP_L( ESI ) /* discard ptr to clip_table */ +#endif + POP_L( EBX ) + POP_L( EBP ) + POP_L( EDI ) + POP_L( ESI ) + + RET |