/* $Id: x86_cliptest.S,v 1.12 2006/04/17 18:58:24 krh 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_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(GNU_ASSEMBLER) && !defined(ELFPIC) #define ELFPIC #endif ALIGNTEXT16 GLOBL GLNAME( _mesa_x86_cliptest_points4 ) HIDDEN(_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( 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 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), 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 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 ) HIDDEN(_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( 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 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 #if defined (__ELF__) && defined (__linux__) .section .note.GNU-stack,"",%progbits #endif