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/* $Id: x86_cliptest.s,v 1.1 2003-03-13 12:11:49 giacomo 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.*//** NOTE: Avoid using spaces in between '(' ')' and arguments, especially* with macros like CONST, LLBL that expand to CONCAT(...). Putting spaces* in there will break the build on some platforms.*/#include "matypes.h"#include "clip_args.h"#define SRC0 REGOFF(0, ESI)#define SRC1 REGOFF(4, ESI)#define SRC2 REGOFF(8, ESI)#define SRC3 REGOFF(12, ESI)#define DST0 REGOFF(0, EDI)#define DST1 REGOFF(4, EDI)#define DST2 REGOFF(8, EDI)#define DST3 REGOFF(12, EDI)#define MAT0 REGOFF(0, EDX)#define MAT1 REGOFF(4, EDX)#define MAT2 REGOFF(8, EDX)#define MAT3 REGOFF(12, EDX)/** Table for clip test.** bit6 = SRC3 < 0* bit5 = SRC2 < 0* bit4 = abs(S(2)) > abs(S(3))* bit3 = SRC1 < 0* bit2 = abs(S(1)) > abs(S(3))* bit1 = SRC0 < 0* bit0 = abs(S(0)) > abs(S(3))*/SEG_DATAclip_table:D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0aD_BYTE 0x20, 0x21, 0x20, 0x22, 0x24, 0x25, 0x24, 0x26D_BYTE 0x20, 0x21, 0x20, 0x22, 0x28, 0x29, 0x28, 0x2aD_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0aD_BYTE 0x10, 0x11, 0x10, 0x12, 0x14, 0x15, 0x14, 0x16D_BYTE 0x10, 0x11, 0x10, 0x12, 0x18, 0x19, 0x18, 0x1aD_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3aD_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x27, 0x25, 0x27, 0x26D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x2b, 0x29, 0x2b, 0x2aD_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3aD_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x17, 0x15, 0x17, 0x16D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x1b, 0x19, 0x1b, 0x1aSEG_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(GNU_ASSEMBLER) && !defined(ELFPIC)#define ELFPIC#endifALIGNTEXT16GLOBL GLNAME( _mesa_x86_cliptest_points4 )GLNAME( _mesa_x86_cliptest_points4 ):#ifdef ELFPIC#define FRAME_OFFSET 20#else#define FRAME_OFFSET 16#endifPUSH_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 )RETLLBL(ctp4_clip_table_ready):#endifMOV_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) )ALIGNTEXT16LLBL(ctp4_top):FLD1 /* F3 */FDIV_S( SRC3 ) /* GH: don't care about div-by-zero */MOV_L( SRC3, EBP )MOV_L( SRC2, 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( SRC1, 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( SRC0, 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 ELFPICMOV_L( REGIND(ESP), EBP ) /* clip_table */MOV_B( REGBI(EBP, ECX), CL )#elseMOV_B( REGOFF(clip_table,ECX), CL )#endifOR_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), DST0 )MOV_L( CONST(0), DST1 )MOV_L( CONST(0), DST2 )MOV_L( CONST(0x3f800000), DST3 )JMP( LLBL(ctp4_next) )LLBL(ctp4_proj):FLD_S( SRC0 ) /* F0 F3 */FMUL2( ST(1), ST0 )FLD_S( SRC1 ) /* F1 F0 F3 */FMUL2( ST(2), ST0 )FLD_S( SRC2 ) /* F2 F1 F0 F3 */FMUL2( ST(3), ST0 )FXCH( ST(2) ) /* F0 F1 F2 F3 */FSTP_S( DST0 ) /* F1 F2 F3 */FSTP_S( DST1 ) /* F2 F3 */FSTP_S( DST2 ) /* F3 */FSTP_S( DST3 ) /* */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 ELFPICPOP_L( ESI ) /* discard ptr to clip_table */#endifPOP_L( EBX )POP_L( EBP )POP_L( EDI )POP_L( ESI )RETALIGNTEXT16GLOBL GLNAME( _mesa_x86_cliptest_points4_np )GLNAME( _mesa_x86_cliptest_points4_np ):#ifdef ELFPIC#define FRAME_OFFSET 20#else#define FRAME_OFFSET 16#endifPUSH_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 )RETLLBL(ctp4_np_clip_table_ready):#endifMOV_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) )ALIGNTEXT16LLBL(ctp4_np_top):MOV_L( SRC3, EBP )MOV_L( SRC2, 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( SRC1, 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( SRC0, 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 ELFPICMOV_L( REGIND(ESP), EBP ) /* clip_table */MOV_B( REGBI(EBP, ECX), CL )#elseMOV_B( REGOFF(clip_table,ECX), CL )#endifOR_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 ELFPICPOP_L( ESI ) /* discard ptr to clip_table */#endifPOP_L( EBX )POP_L( EBP )POP_L( EDI )POP_L( ESI )RET