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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [zlib/] [contrib/] [masmx86/] [gvmat32c.c] - Blame information for rev 745

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Line No. Rev Author Line
1 745 jeremybenn
/* gvmat32.c -- C portion of the optimized longest_match for 32 bits x86
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 * Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant.
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 * File written by Gilles Vollant, by modifiying the longest_match
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 *  from Jean-loup Gailly in deflate.c
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 *  it prepare all parameters and call the assembly longest_match_gvasm
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 *  longest_match execute standard C code is wmask != 0x7fff
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 *     (assembly code is faster with a fixed wmask)
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 *
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 * Read comment at beginning of gvmat32.asm for more information
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 */
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#if defined(ASMV) && (!defined(NOOLDPENTIUMCODE))
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#include "deflate.h"
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/* if your C compiler don't add underline before function name,
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        define ADD_UNDERLINE_ASMFUNC */
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#ifdef ADD_UNDERLINE_ASMFUNC
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#define longest_match_7fff _longest_match_7fff
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#define longest_match_686  _longest_match_686
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#define cpudetect32        _cpudetect32
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#endif
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unsigned long cpudetect32();
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uInt longest_match_c(
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    deflate_state *s,
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    IPos cur_match);                             /* current match */
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uInt longest_match_7fff(
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    deflate_state *s,
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    IPos cur_match);                             /* current match */
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uInt longest_match_686(
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    deflate_state *s,
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    IPos cur_match);                             /* current match */
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static uInt iIsPPro=2;
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void match_init ()
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{
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    iIsPPro = (((cpudetect32()/0x100)&0xf)>=6) ? 1 : 0;
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}
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uInt longest_match(
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    deflate_state *s,
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    IPos cur_match)                             /* current match */
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{
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    if (iIsPPro!=0)
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        return longest_match_686(s,cur_match);
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    if (s->w_mask != 0x7fff)
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        return longest_match_686(s,cur_match);
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    /* now ((s->w_mask == 0x7fff) && (iIsPPro==0)) */
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        return longest_match_7fff(s,cur_match);
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}
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#endif /* defined(ASMV) && (!defined(NOOLDPENTIUMCODE)) */

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