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Diffstat (limited to 'asm/i386/src/lzo_asm.h')
| -rw-r--r-- | asm/i386/src/lzo_asm.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/asm/i386/src/lzo_asm.h b/asm/i386/src/lzo_asm.h new file mode 100644 index 0000000..55fdf6d --- /dev/null +++ b/asm/i386/src/lzo_asm.h @@ -0,0 +1,287 @@ +/* lzo_asm.h -- LZO assembler stuff + + This file is part of the LZO real-time data compression library. + + Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer + All Rights Reserved. + + The LZO library is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of + the License, or (at your option) any later version. + + The LZO library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with the LZO library; see the file COPYING. + If not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + + Markus F.X.J. Oberhumer + <markus@oberhumer.com> + http://www.oberhumer.com/opensource/lzo/ + */ + + +/*********************************************************************** +// <asmconfig.h> +************************************************************************/ + +#if !defined(__i386__) +# error +#endif + +#if !defined(IN_CONFIGURE) +#if defined(LZO_HAVE_CONFIG_H) +# include <config.h> +#else + /* manual configuration - see defaults below */ +# if defined(__ELF__) +# define MFX_ASM_HAVE_TYPE +# define MFX_ASM_NAME_NO_UNDERSCORES +# elif defined(__linux__) /* Linux a.out */ +# define MFX_ASM_ALIGN_PTWO +# elif defined(__DJGPP__) +# define MFX_ASM_ALIGN_PTWO +# elif defined(__GO32__) /* djgpp v1 */ +# define MFX_ASM_CANNOT_USE_EBP +# elif defined(__EMX__) +# define MFX_ASM_ALIGN_PTWO +# define MFX_ASM_CANNOT_USE_EBP +# endif +#endif +#endif + +#if 1 && defined(__ELF__) +.section .note.GNU-stack,"",@progbits +#endif +#if 0 && defined(__ELF__) +#undef i386 +.arch i386 +.code32 +#endif + + +/*********************************************************************** +// name always uses underscores +// [ OLD: name (default: with underscores) ] +************************************************************************/ + +#if !defined(LZO_ASM_NAME) +# define LZO_ASM_NAME(n) _ ## n +#if 0 +# if defined(MFX_ASM_NAME_NO_UNDERSCORES) +# define LZO_ASM_NAME(n) n +# else +# define LZO_ASM_NAME(n) _ ## n +# endif +#endif +#endif + + +/*********************************************************************** +// .type (default: do not use) +************************************************************************/ + +#if !defined(LZO_PUBLIC) +#if defined(__LZO_DB__) +# define LZO_PUBLIC(func) \ + .p2align 4 ; .byte 0,0,0,0,0,0,0 ; .ascii "LZO_START" +# define LZO_PUBLIC_END(func) \ + .p2align 4,0x90 ; .ascii "LZO_END" +#elif defined(MFX_ASM_HAVE_TYPE) +# define LZO_PUBLIC(func) \ + ALIGN3 ; .type LZO_ASM_NAME(func),@function ; \ + .globl LZO_ASM_NAME(func) ; LZO_ASM_NAME(func): +# define LZO_PUBLIC_END(func) \ + .size LZO_ASM_NAME(func),.-LZO_ASM_NAME(func) +#else +# define LZO_PUBLIC(func) \ + ALIGN3 ; .globl LZO_ASM_NAME(func) ; LZO_ASM_NAME(func): +# define LZO_PUBLIC_END(func) +#endif +#endif + + +/*********************************************************************** +// .align (default: bytes) +************************************************************************/ + +#if !defined(MFX_ASM_ALIGN_BYTES) && !defined(MFX_ASM_ALIGN_PTWO) +# define MFX_ASM_ALIGN_BYTES +#endif + +#if !defined(LZO_ASM_ALIGN) +# if defined(MFX_ASM_ALIGN_PTWO) +# define LZO_ASM_ALIGN(x) .align x +# else +# define LZO_ASM_ALIGN(x) .align (1 << (x)) +# endif +#endif + +#define ALIGN1 LZO_ASM_ALIGN(1) +#define ALIGN2 LZO_ASM_ALIGN(2) +#define ALIGN3 LZO_ASM_ALIGN(3) + + +/*********************************************************************** +// ebp usage (default: can use) +************************************************************************/ + +#if !defined(MFX_ASM_CANNOT_USE_EBP) +# if 1 && !defined(N_3_EBP) && !defined(N_255_EBP) +# define N_3_EBP +# endif +# if 0 && !defined(N_3_EBP) && !defined(N_255_EBP) +# define N_255_EBP +# endif +#endif + +#if defined(N_3_EBP) && defined(N_255_EBP) +# error +#endif +#if defined(MFX_ASM_CANNOT_USE_EBP) +# if defined(N_3_EBP) || defined(N_255_EBP) +# error +# endif +#endif + +#if !defined(N_3) +# if defined(N_3_EBP) +# define N_3 %ebp +# else +# define N_3 $3 +# endif +#endif + +#if !defined(N_255) +# if defined(N_255_EBP) +# define N_255 %ebp +# define NOTL_3(r) xorl %ebp,r +# else +# define N_255 $255 +# endif +#endif + +#if !defined(NOTL_3) +# define NOTL_3(r) xorl N_3,r +#endif + + +/*********************************************************************** +// +************************************************************************/ + +#ifndef INP +#define INP 4+36(%esp) +#define INS 8+36(%esp) +#define OUTP 12+36(%esp) +#define OUTS 16+36(%esp) +#endif + +#define INEND 4(%esp) +#define OUTEND (%esp) + + +#if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT) +# define TEST_IP_R(r) cmpl r,INEND ; jb .L_input_overrun +# define TEST_IP(addr,r) leal addr,r ; TEST_IP_R(r) +#else +# define TEST_IP_R(r) +# define TEST_IP(addr,r) +#endif + +#if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT) +# define TEST_OP_R(r) cmpl r,OUTEND ; jb .L_output_overrun +# define TEST_OP(addr,r) leal addr,r ; TEST_OP_R(r) +#else +# define TEST_OP_R(r) +# define TEST_OP(addr,r) +#endif + +#if defined(LZO_TEST_DECOMPRESS_OVERRUN_LOOKBEHIND) +# define TEST_LOOKBEHIND(r) cmpl OUTP,r ; jb .L_lookbehind_overrun +#else +# define TEST_LOOKBEHIND(r) +#endif + + +/*********************************************************************** +// +************************************************************************/ + +#define LODSB movb (%esi),%al ; incl %esi + +#define MOVSB(r1,r2,x) movb (r1),x ; incl r1 ; movb x,(r2) ; incl r2 +#define MOVSW(r1,r2,x) movb (r1),x ; movb x,(r2) ; \ + movb 1(r1),x ; addl $2,r1 ; \ + movb x,1(r2) ; addl $2,r2 +#define MOVSL(r1,r2,x) movl (r1),x ; addl $4,r1 ; movl x,(r2) ; addl $4,r2 + +#if defined(LZO_DEBUG) +#define COPYB_C(r1,r2,x,rc) \ + cmpl $0,rc ; jz .L_assert_fail; \ + 9: MOVSB(r1,r2,x) ; decl rc ; jnz 9b +#define COPYL_C(r1,r2,x,rc) \ + cmpl $0,rc ; jz .L_assert_fail; \ + 9: MOVSL(r1,r2,x) ; decl rc ; jnz 9b +#else +#define COPYB_C(r1,r2,x,rc) \ + 9: MOVSB(r1,r2,x) ; decl rc ; jnz 9b +#define COPYL_C(r1,r2,x,rc) \ + 9: MOVSL(r1,r2,x) ; decl rc ; jnz 9b +#endif + +#define COPYB(r1,r2,x) COPYB_C(r1,r2,x,%ecx) +#define COPYL(r1,r2,x) COPYL_C(r1,r2,x,%ecx) + + +/*********************************************************************** +// not used +************************************************************************/ + +#if 0 + +#if 0 +#define REP_MOVSB(x) rep ; movsb +#define REP_MOVSL(x) shrl $2,%ecx ; rep ; movsl +#elif 1 +#define REP_MOVSB(x) COPYB(%esi,%edi,x) +#define REP_MOVSL(x) shrl $2,%ecx ; COPYL(%esi,%edi,x) +#else +#define REP_MOVSB(x) rep ; movsb +#define REP_MOVSL(x) jmp 9f ; 8: movsb ; decl %ecx ; \ + 9: testl $3,%edi ; jnz 8b ; \ + movl %ecx,x ; shrl $2,%ecx ; andl $3,x ; \ + rep ; movsl ; movl x,%ecx ; rep ; movsb +#endif + +#if 1 +#define NEGL(x) negl x +#else +#define NEGL(x) xorl $-1,x ; incl x +#endif + +#endif + + + +/* +vi:ts=4 +*/ + |