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annotate zlib/contrib/masmx64/inffas8664.c @ 51:ae3a4bfb450b

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add some files of version 4.4.3 that have been forgotten.
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Sun, 07 Feb 2010 18:27:48 +0900
parents
children 04ced10e8804
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51
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 /* inffas8664.c is a hand tuned assembler version of inffast.c - fast decoding
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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2 * version for AMD64 on Windows using Microsoft C compiler
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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3 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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4 * Copyright (C) 1995-2003 Mark Adler
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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5 * For conditions of distribution and use, see copyright notice in zlib.h
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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6 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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7 * Copyright (C) 2003 Chris Anderson <christop@charm.net>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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8 * Please use the copyright conditions above.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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9 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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10 * 2005 - Adaptation to Microsoft C Compiler for AMD64 by Gilles Vollant
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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11 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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12 * inffas8664.c call function inffas8664fnc in inffasx64.asm
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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13 * inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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14 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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15 * Dec-29-2003 -- I added AMD64 inflate asm support. This version is also
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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16 * slightly quicker on x86 systems because, instead of using rep movsb to copy
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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17 * data, it uses rep movsw, which moves data in 2-byte chunks instead of single
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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18 * bytes. I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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19 * from http://fedora.linux.duke.edu/fc1_x86_64
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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20 * which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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21 * 1GB ram. The 64-bit version is about 4% faster than the 32-bit version,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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22 * when decompressing mozilla-source-1.3.tar.gz.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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23 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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24 * Mar-13-2003 -- Most of this is derived from inffast.S which is derived from
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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25 * the gcc -S output of zlib-1.2.0/inffast.c. Zlib-1.2.0 is in beta release at
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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26 * the moment. I have successfully compiled and tested this code with gcc2.96,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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27 * gcc3.2, icc5.0, msvc6.0. It is very close to the speed of inffast.S
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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28 * compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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29 * enabled. I will attempt to merge the MMX code into this version. Newer
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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30 * versions of this and inffast.S can be found at
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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31 * http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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32 *
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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33 */
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34
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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35 #include <stdio.h>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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36 #include "zutil.h"
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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37 #include "inftrees.h"
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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38 #include "inflate.h"
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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39 #include "inffast.h"
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40
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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41 /* Mark Adler's comments from inffast.c: */
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42
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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43 /*
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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44 Decode literal, length, and distance codes and write out the resulting
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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45 literal and match bytes until either not enough input or output is
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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46 available, an end-of-block is encountered, or a data error is encountered.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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47 When large enough input and output buffers are supplied to inflate(), for
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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48 example, a 16K input buffer and a 64K output buffer, more than 95% of the
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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49 inflate execution time is spent in this routine.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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50
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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51 Entry assumptions:
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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52
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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53 state->mode == LEN
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54 strm->avail_in >= 6
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55 strm->avail_out >= 258
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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56 start >= strm->avail_out
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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57 state->bits < 8
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58
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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59 On return, state->mode is one of:
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60
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61 LEN -- ran out of enough output space or enough available input
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62 TYPE -- reached end of block code, inflate() to interpret next block
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63 BAD -- error in block data
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64
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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65 Notes:
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66
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67 - The maximum input bits used by a length/distance pair is 15 bits for the
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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68 length code, 5 bits for the length extra, 15 bits for the distance code,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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69 and 13 bits for the distance extra. This totals 48 bits, or six bytes.
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70 Therefore if strm->avail_in >= 6, then there is enough input to avoid
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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71 checking for available input while decoding.
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72
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73 - The maximum bytes that a single length/distance pair can output is 258
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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74 bytes, which is the maximum length that can be coded. inflate_fast()
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75 requires strm->avail_out >= 258 for each loop to avoid checking for
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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76 output space.
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77 */
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78
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79
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80
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81 typedef struct inffast_ar {
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82 /* 64 32 x86 x86_64 */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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83 /* ar offset register */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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84 /* 0 0 */ void *esp; /* esp save */
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85 /* 8 4 */ void *ebp; /* ebp save */
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86 /* 16 8 */ unsigned char FAR *in; /* esi rsi local strm->next_in */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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87 /* 24 12 */ unsigned char FAR *last; /* r9 while in < last */
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88 /* 32 16 */ unsigned char FAR *out; /* edi rdi local strm->next_out */
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89 /* 40 20 */ unsigned char FAR *beg; /* inflate()'s init next_out */
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90 /* 48 24 */ unsigned char FAR *end; /* r10 while out < end */
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91 /* 56 28 */ unsigned char FAR *window;/* size of window, wsize!=0 */
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92 /* 64 32 */ code const FAR *lcode; /* ebp rbp local strm->lencode */
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93 /* 72 36 */ code const FAR *dcode; /* r11 local strm->distcode */
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94 /* 80 40 */ size_t /*unsigned long */hold; /* edx rdx local strm->hold */
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95 /* 88 44 */ unsigned bits; /* ebx rbx local strm->bits */
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96 /* 92 48 */ unsigned wsize; /* window size */
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97 /* 96 52 */ unsigned write; /* window write index */
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98 /*100 56 */ unsigned lmask; /* r12 mask for lcode */
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99 /*104 60 */ unsigned dmask; /* r13 mask for dcode */
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100 /*108 64 */ unsigned len; /* r14 match length */
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101 /*112 68 */ unsigned dist; /* r15 match distance */
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102 /*116 72 */ unsigned status; /* set when state chng*/
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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103 } type_ar;
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104 #ifdef ASMINF
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105
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106 void inflate_fast(strm, start)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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107 z_streamp strm;
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108 unsigned start; /* inflate()'s starting value for strm->avail_out */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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109 {
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110 struct inflate_state FAR *state;
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111 type_ar ar;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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112 void inffas8664fnc(struct inffast_ar * par);
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113
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
114
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
115
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
116 #if (defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )) || (defined(_MSC_VER) && defined(_M_AMD64))
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
117 #define PAD_AVAIL_IN 6
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
118 #define PAD_AVAIL_OUT 258
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
119 #else
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
120 #define PAD_AVAIL_IN 5
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
121 #define PAD_AVAIL_OUT 257
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
122 #endif
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
123
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
124 /* copy state to local variables */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 state = (struct inflate_state FAR *)strm->state;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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126
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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127 ar.in = strm->next_in;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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128 ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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129 ar.out = strm->next_out;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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130 ar.beg = ar.out - (start - strm->avail_out);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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132 ar.wsize = state->wsize;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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133 ar.write = state->write;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 ar.window = state->window;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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135 ar.hold = state->hold;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 ar.bits = state->bits;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 ar.lcode = state->lencode;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 ar.dcode = state->distcode;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 ar.lmask = (1U << state->lenbits) - 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 ar.dmask = (1U << state->distbits) - 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
141
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 /* decode literals and length/distances until end-of-block or not enough
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 input data or output space */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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144
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 /* align in on 1/2 hold size boundary */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 while (((size_t)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 ar.hold += (unsigned long)*ar.in++ << ar.bits;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 ar.bits += 8;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
150
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 inffas8664fnc(&ar);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
152
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 if (ar.status > 1) {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 if (ar.status == 2)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 strm->msg = "invalid literal/length code";
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 else if (ar.status == 3)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 strm->msg = "invalid distance code";
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 else
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 strm->msg = "invalid distance too far back";
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 state->mode = BAD;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 else if ( ar.status == 1 ) {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 state->mode = TYPE;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
165
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 ar.len = ar.bits >> 3;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 ar.in -= ar.len;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 ar.bits -= ar.len << 3;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 ar.hold &= (1U << ar.bits) - 1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
171
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 /* update state and return */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 strm->next_in = ar.in;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 strm->next_out = ar.out;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 strm->avail_in = (unsigned)(ar.in < ar.last ?
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 PAD_AVAIL_IN + (ar.last - ar.in) :
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 PAD_AVAIL_IN - (ar.in - ar.last));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 strm->avail_out = (unsigned)(ar.out < ar.end ?
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 PAD_AVAIL_OUT + (ar.end - ar.out) :
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 PAD_AVAIL_OUT - (ar.out - ar.end));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 state->hold = (unsigned long)ar.hold;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 state->bits = ar.bits;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 return;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
185
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 #endif