1/* lzo_asm.h -- LZO assembler stuff 2 3 This file is part of the LZO real-time data compression library. 4 5 Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer 6 Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer 7 Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer 8 Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer 9 Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer 10 Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer 11 Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer 12 Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer 13 Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer 14 Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer 15 Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer 16 Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer 17 Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer 18 Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer 19 Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer 20 Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer 21 All Rights Reserved. 22 23 The LZO library is free software; you can redistribute it and/or 24 modify it under the terms of the GNU General Public License as 25 published by the Free Software Foundation; either version 2 of 26 the License, or (at your option) any later version. 27 28 The LZO library is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 31 GNU General Public License for more details. 32 33 You should have received a copy of the GNU General Public License 34 along with the LZO library; see the file COPYING. 35 If not, write to the Free Software Foundation, Inc., 36 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 37 38 Markus F.X.J. Oberhumer 39 <markus@oberhumer.com> 40 http://www.oberhumer.com/opensource/lzo/ 41 */ 42 43 44/*********************************************************************** 45// <asmconfig.h> 46************************************************************************/ 47 48#if !defined(__i386__) 49# error 50#endif 51 52#if !defined(IN_CONFIGURE) 53#if defined(LZO_HAVE_CONFIG_H) 54# include <config.h> 55#else 56 /* manual configuration - see defaults below */ 57# if defined(__ELF__) 58# define MFX_ASM_HAVE_TYPE 1 59# define MFX_ASM_NAME_NO_UNDERSCORES 1 60# elif defined(__linux__) /* Linux a.out */ 61# define MFX_ASM_ALIGN_PTWO 1 62# elif defined(__DJGPP__) 63# define MFX_ASM_ALIGN_PTWO 1 64# elif defined(__GO32__) /* djgpp v1 */ 65# define MFX_ASM_CANNOT_USE_EBP 1 66# elif defined(__EMX__) 67# define MFX_ASM_ALIGN_PTWO 1 68# define MFX_ASM_CANNOT_USE_EBP 1 69# endif 70#endif 71#endif 72 73#if 1 && defined(__ELF__) 74.section .note.GNU-stack,"",@progbits 75#endif 76#if 0 && defined(__ELF__) 77#undef i386 78.arch i386 79.code32 80#endif 81 82 83/*********************************************************************** 84// name always uses underscores 85// [ OLD: name (default: with underscores) ] 86************************************************************************/ 87 88#if !defined(LZO_ASM_NAME) 89# define LZO_ASM_NAME(n) _ ## n 90#if 0 91# if defined(MFX_ASM_NAME_NO_UNDERSCORES) 92# define LZO_ASM_NAME(n) n 93# else 94# define LZO_ASM_NAME(n) _ ## n 95# endif 96#endif 97#endif 98 99 100/*********************************************************************** 101// .type (default: do not use) 102************************************************************************/ 103 104#if !defined(LZO_PUBLIC) 105#if defined(__LZO_DB__) 106# define LZO_PUBLIC(func) \ 107 .p2align 4 ; .byte 0,0,0,0,0,0,0 ; .ascii "LZO_START" 108# define LZO_PUBLIC_END(func) \ 109 .p2align 4,0x90 ; .ascii "LZO_END" 110#elif defined(MFX_ASM_HAVE_TYPE) 111# define LZO_PUBLIC(func) \ 112 ALIGN3 ; .type LZO_ASM_NAME(func),@function ; \ 113 .globl LZO_ASM_NAME(func) ; LZO_ASM_NAME(func): 114# define LZO_PUBLIC_END(func) \ 115 .size LZO_ASM_NAME(func),.-LZO_ASM_NAME(func) 116#else 117# define LZO_PUBLIC(func) \ 118 ALIGN3 ; .globl LZO_ASM_NAME(func) ; LZO_ASM_NAME(func): 119# define LZO_PUBLIC_END(func) 120#endif 121#endif 122 123 124/*********************************************************************** 125// .align (default: bytes) 126************************************************************************/ 127 128#if !defined(MFX_ASM_ALIGN_BYTES) && !defined(MFX_ASM_ALIGN_PTWO) 129# define MFX_ASM_ALIGN_BYTES 1 130#endif 131 132#if !defined(LZO_ASM_ALIGN) 133# if defined(MFX_ASM_ALIGN_PTWO) 134# define LZO_ASM_ALIGN(x) .align x 135# else 136# define LZO_ASM_ALIGN(x) .align (1 << (x)) 137# endif 138#endif 139 140#define ALIGN1 LZO_ASM_ALIGN(1) 141#define ALIGN2 LZO_ASM_ALIGN(2) 142#define ALIGN3 LZO_ASM_ALIGN(3) 143 144 145/*********************************************************************** 146// ebp usage (default: can use) 147************************************************************************/ 148 149#if !defined(MFX_ASM_CANNOT_USE_EBP) 150# if 1 && !defined(N_3_EBP) && !defined(N_255_EBP) 151# define N_3_EBP 1 152# endif 153# if 0 && !defined(N_3_EBP) && !defined(N_255_EBP) 154# define N_255_EBP 1 155# endif 156#endif 157 158#if defined(N_3_EBP) && defined(N_255_EBP) 159# error 160#endif 161#if defined(MFX_ASM_CANNOT_USE_EBP) 162# if defined(N_3_EBP) || defined(N_255_EBP) 163# error 164# endif 165#endif 166 167#if !defined(N_3) 168# if defined(N_3_EBP) 169# define N_3 %ebp 170# else 171# define N_3 $3 172# endif 173#endif 174 175#if !defined(N_255) 176# if defined(N_255_EBP) 177# define N_255 %ebp 178# define NOTL_3(r) xorl %ebp,r 179# else 180# define N_255 $255 181# endif 182#endif 183 184#if !defined(NOTL_3) 185# define NOTL_3(r) xorl N_3,r 186#endif 187 188 189/*********************************************************************** 190// 191************************************************************************/ 192 193#ifndef INP 194#define INP 4+36(%esp) 195#define INS 8+36(%esp) 196#define OUTP 12+36(%esp) 197#define OUTS 16+36(%esp) 198#endif 199 200#define INEND 4(%esp) 201#define OUTEND (%esp) 202 203 204#if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) 205# define TEST_IP_R(r) cmpl r,INEND ; jb .L_input_overrun 206# define TEST_IP(addr,r) leal addr,r ; TEST_IP_R(r) 207#else 208# define TEST_IP_R(r) 209# define TEST_IP(addr,r) 210#endif 211 212#if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) 213# define TEST_OP_R(r) cmpl r,OUTEND ; jb .L_output_overrun 214# define TEST_OP(addr,r) leal addr,r ; TEST_OP_R(r) 215#else 216# define TEST_OP_R(r) 217# define TEST_OP(addr,r) 218#endif 219 220#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) 221# define TEST_LOOKBEHIND(r) cmpl OUTP,r ; jb .L_lookbehind_overrun 222#else 223# define TEST_LOOKBEHIND(r) 224#endif 225 226 227/*********************************************************************** 228// 229************************************************************************/ 230 231#define LODSB movb (%esi),%al ; incl %esi 232 233#define MOVSB(r1,r2,x) movb (r1),x ; incl r1 ; movb x,(r2) ; incl r2 234#define MOVSW(r1,r2,x) movb (r1),x ; movb x,(r2) ; \ 235 movb 1(r1),x ; addl $2,r1 ; \ 236 movb x,1(r2) ; addl $2,r2 237#define MOVSL(r1,r2,x) movl (r1),x ; addl $4,r1 ; movl x,(r2) ; addl $4,r2 238 239#if defined(LZO_DEBUG) 240#define COPYB_C(r1,r2,x,rc) \ 241 cmpl $0,rc ; jz .L_assert_fail; \ 242 9: MOVSB(r1,r2,x) ; decl rc ; jnz 9b 243#define COPYL_C(r1,r2,x,rc) \ 244 cmpl $0,rc ; jz .L_assert_fail; \ 245 9: MOVSL(r1,r2,x) ; decl rc ; jnz 9b 246#else 247#define COPYB_C(r1,r2,x,rc) \ 248 9: MOVSB(r1,r2,x) ; decl rc ; jnz 9b 249#define COPYL_C(r1,r2,x,rc) \ 250 9: MOVSL(r1,r2,x) ; decl rc ; jnz 9b 251#endif 252 253#define COPYB(r1,r2,x) COPYB_C(r1,r2,x,%ecx) 254#define COPYL(r1,r2,x) COPYL_C(r1,r2,x,%ecx) 255 256 257/*********************************************************************** 258// not used 259************************************************************************/ 260 261#if 0 262 263#if 0 264#define REP_MOVSB(x) rep ; movsb 265#define REP_MOVSL(x) shrl $2,%ecx ; rep ; movsl 266#elif 1 267#define REP_MOVSB(x) COPYB(%esi,%edi,x) 268#define REP_MOVSL(x) shrl $2,%ecx ; COPYL(%esi,%edi,x) 269#else 270#define REP_MOVSB(x) rep ; movsb 271#define REP_MOVSL(x) jmp 9f ; 8: movsb ; decl %ecx ; \ 272 9: testl $3,%edi ; jnz 8b ; \ 273 movl %ecx,x ; shrl $2,%ecx ; andl $3,x ; \ 274 rep ; movsl ; movl x,%ecx ; rep ; movsb 275#endif 276 277#if 1 278#define NEGL(x) negl x 279#else 280#define NEGL(x) xorl $-1,x ; incl x 281#endif 282 283#endif 284 285 286 287/* 288vi:ts=4 289*/ 290 291