This commit was generated by cvs2svn to compensate for changes in r104181,

[thirdparty/gcc.git] / zlib / contrib / masmx86 / gvmat32c.c

/* gvmat32.c -- C portion of the optimized longest_match for 32 bits x86\r
 * Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant.\r
 * File written by Gilles Vollant, by modifiying the longest_match\r
 *  from Jean-loup Gailly in deflate.c\r
 *  it prepare all parameters and call the assembly longest_match_gvasm\r
 *  longest_match execute standard C code is wmask != 0x7fff\r
 *     (assembly code is faster with a fixed wmask)\r
 *\r
 * Read comment at beginning of gvmat32.asm for more information\r
 */\r
\r
#if defined(ASMV) && (!defined(NOOLDPENTIUMCODE))\r
#include "deflate.h"\r
\r
/* if your C compiler don't add underline before function name,\r
        define ADD_UNDERLINE_ASMFUNC */\r
#ifdef ADD_UNDERLINE_ASMFUNC\r
#define longest_match_7fff _longest_match_7fff\r
#define longest_match_686  _longest_match_686\r
#define cpudetect32        _cpudetect32\r
#endif\r
\r
\r
unsigned long cpudetect32();\r
\r
uInt longest_match_c(\r
    deflate_state *s,\r
    IPos cur_match);                             /* current match */\r
\r
\r
uInt longest_match_7fff(\r
    deflate_state *s,\r
    IPos cur_match);                             /* current match */\r
\r
uInt longest_match_686(\r
    deflate_state *s,\r
    IPos cur_match);                             /* current match */\r
\r
\r
static uInt iIsPPro=2;\r
\r
void match_init ()\r
{\r
    iIsPPro = (((cpudetect32()/0x100)&0xf)>=6) ? 1 : 0;\r
}\r
\r
uInt longest_match(\r
    deflate_state *s,\r
    IPos cur_match)                             /* current match */\r
{\r
    if (iIsPPro!=0)\r
        return longest_match_686(s,cur_match);\r
\r
    if (s->w_mask != 0x7fff)\r
        return longest_match_686(s,cur_match);\r
\r
    /* now ((s->w_mask == 0x7fff) && (iIsPPro==0)) */\r
        return longest_match_7fff(s,cur_match);\r
}\r
\r
\r
#endif /* defined(ASMV) && (!defined(NOOLDPENTIUMCODE)) */\r