/* $NetBSD: gvmat32c.c,v 1.1.1.1 2006/01/14 20:10:56 christos Exp $ */ /* gvmat32.c -- C portion of the optimized longest_match for 32 bits x86 * Copyright (C) 1995-1996 Jean-loup Gailly and Gilles Vollant. * File written by Gilles Vollant, by modifiying the longest_match * from Jean-loup Gailly in deflate.c * it prepare all parameters and call the assembly longest_match_gvasm * longest_match execute standard C code is wmask != 0x7fff * (assembly code is faster with a fixed wmask) * * Read comment at beginning of gvmat32.asm for more information */ #if defined(ASMV) && (!defined(NOOLDPENTIUMCODE)) #include "deflate.h" /* if your C compiler don't add underline before function name, define ADD_UNDERLINE_ASMFUNC */ #ifdef ADD_UNDERLINE_ASMFUNC #define longest_match_7fff _longest_match_7fff #define longest_match_686 _longest_match_686 #define cpudetect32 _cpudetect32 #endif unsigned long cpudetect32(); uInt longest_match_c( deflate_state *s, IPos cur_match); /* current match */ uInt longest_match_7fff( deflate_state *s, IPos cur_match); /* current match */ uInt longest_match_686( deflate_state *s, IPos cur_match); /* current match */ static uInt iIsPPro=2; void match_init () { iIsPPro = (((cpudetect32()/0x100)&0xf)>=6) ? 1 : 0; } uInt longest_match( deflate_state *s, IPos cur_match) /* current match */ { if (iIsPPro!=0) return longest_match_686(s,cur_match); if (s->w_mask != 0x7fff) return longest_match_686(s,cur_match); /* now ((s->w_mask == 0x7fff) && (iIsPPro==0)) */ return longest_match_7fff(s,cur_match); } #endif /* defined(ASMV) && (!defined(NOOLDPENTIUMCODE)) */