diff options
Diffstat (limited to 'lzf_c.c')
| -rw-r--r-- | lzf_c.c | 30 |
1 files changed, 21 insertions, 9 deletions
@@ -72,6 +72,13 @@ #define MAX_OFF (1 << 13) #define MAX_REF ((1 << 8) + (1 << 3)) +#if (__i386 || __amd64) && __GNUC__ >= 3 +# define lzf_movsb(dst, src, len) \ + asm ("rep movsb" \ + : "=D" (dst), "=S" (src), "=c" (len) \ + : "0" (dst), "1" (src), "2" (len)); +#endif + /* * compressed format * @@ -104,11 +111,10 @@ lzf_compress (const void *const in_data, unsigned int in_len, int lit = 0; #if INIT_HTAB -# if USE_MEMCPY - memset (htab, 0, sizeof (htab)); -# else - for (hslot = htab; hslot < htab + HSIZE; hslot++) - *hslot++ = ip; + memset (htab, 0, sizeof (htab)); +# if 0 + for (hslot = htab; hslot < htab + HSIZE; hslot++) + *hslot++ = ip; # endif #endif @@ -214,10 +220,10 @@ lzf_compress (const void *const in_data, unsigned int in_len, return 0; *op++ = MAX_LIT - 1; -#if USE_MEMCPY - memcpy (op, ip - MAX_LIT, MAX_LIT); - op += MAX_LIT; - lit = 0; + +#ifdef lzf_movsb + ip -= lit; + lzf_movsb (op, ip, lit); #else lit = -lit; do @@ -233,11 +239,17 @@ lzf_compress (const void *const in_data, unsigned int in_len, return 0; *op++ = lit - 1; +#ifdef lzf_movsb + ip -= lit; + lzf_movsb (op, ip, lit); +#else lit = -lit; do *op++ = ip[lit]; while (++lit); +#endif } return op - (u8 *) out_data; } + |