/* $Id: x86_cliptest.S,v 1.8 2001/05/21 16:33:41 gareth Exp $ */ /* * Mesa 3-D graphics library * Version: 3.5 * * Copyright (C) 1999-2001 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 "matypes.h" #include "clip_args.h" #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 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06 D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a D_BYTE 0x20, 0x21, 0x20, 0x22, 0x24, 0x25, 0x24, 0x26 D_BYTE 0x20, 0x21, 0x20, 0x22, 0x28, 0x29, 0x28, 0x2a D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06 D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a D_BYTE 0x10, 0x11, 0x10, 0x12, 0x14, 0x15, 0x14, 0x16 D_BYTE 0x10, 0x11, 0x10, 0x12, 0x18, 0x19, 0x18, 0x1a D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36 D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x27, 0x25, 0x27, 0x26 D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x2b, 0x29, 0x2b, 0x2a D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36 D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x17, 0x15, 0x17, 0x16 D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x1b, 0x19, 0x1b, 0x1a SEG_TEXT /* * _mesa_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( _mesa_x86_cliptest_points4 ) GLNAME( _mesa_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(4), 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) ) /* GH: don't care about div-by-zero */ 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 ) ) LLBL( ctp4_noproj ): FSTP( ST(0) ) /* */ MOV_L( CONST(0), DST(0) ) MOV_L( CONST(0), DST(1) ) MOV_L( CONST(0), DST(2) ) MOV_L( CONST(0x3f800000), DST(3) ) 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 ALIGNTEXT16 GLOBL GLNAME( _mesa_x86_cliptest_points4_np ) GLNAME( _mesa_x86_cliptest_points4_np ): #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_np_get_eip ) ) ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX ) MOV_L( REGOFF(clip_table@GOT, EBX), EBX ) PUSH_L( EBX ) JMP( LLBL( ctp4_np_clip_table_ready ) ) LLBL( ctp4_np_get_eip ): /* store eip in ebx */ MOV_L( REGIND(ESP), EBX ) RET LLBL( ctp4_np_clip_table_ready ): #endif MOV_L( ARG_SOURCE, ESI ) /* slot */ 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 ) MOV_L( EAX, ARG_DEST ) /* put stride in ARG_DEST */ ADD_L( EDX, ECX ) MOV_L( ECX, EDI ) /* put clipmask + count in EDI */ CMP_L( ECX, EDX ) MOV_B( REGIND(EBX), AL ) MOV_B( REGIND(EBP), AH ) JZ( LLBL( ctp4_np_finish ) ) ALIGNTEXT16 LLBL( ctp4_np_top ): 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) ) INC_L( EDX ) /* slot */ ADD_L( ARG_DEST, ESI ) CMP_L( EDX, EDI ) JNZ( LLBL( ctp4_np_top ) ) MOV_L( ARG_OR, ECX ) MOV_L( ARG_AND, EDX ) MOV_B( AL, REGIND(ECX) ) MOV_B( AH, REGIND(EDX) ) LLBL( ctp4_np_finish ): MOV_L( ARG_SOURCE, 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