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net: wan: sbni: remove assembly crc32 code 

There is also a C function doing the same thing. Unless the asm code is
110% faster we could stick to the C function.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sebastian Siewior 2013-10-22 20:36:25 +02:00 коммит произвёл David S. Miller
Родитель fecda03493
Коммит 0e67d9903d
1 изменённых файлов: 0 добавлений и 89 удалений
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89
drivers/net/wan/sbni.c
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@ -148,10 +148,6 @@ static int enslave( struct net_device *, struct net_device * );
static int emancipate( struct net_device * );
#endif
#ifdef __i386__
#define ASM_CRC 1
#endif
static const char version[] =
"Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n";
@ -1551,88 +1547,6 @@ __setup( "sbni=", sbni_setup );
/* -------------------------------------------------------------------------- */
#ifdef ASM_CRC
static u32
calc_crc32( u32 crc, u8 *p, u32 len )
{
register u32 _crc;
_crc = crc;
__asm__ __volatile__ (
"xorl %%ebx, %%ebx\n"
"movl %2, %%esi\n"
"movl %3, %%ecx\n"
"movl $crc32tab, %%edi\n"
"shrl $2, %%ecx\n"
"jz 1f\n"
".align 4\n"
"0:\n"
"movb %%al, %%bl\n"
"movl (%%esi), %%edx\n"
"shrl $8, %%eax\n"
"xorb %%dl, %%bl\n"
"shrl $8, %%edx\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb %%dl, %%bl\n"
"shrl $8, %%edx\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb %%dl, %%bl\n"
"movb %%dh, %%dl\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb %%dl, %%bl\n"
"addl $4, %%esi\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"decl %%ecx\n"
"jnz 0b\n"
"1:\n"
"movl %3, %%ecx\n"
"andl $3, %%ecx\n"
"jz 2f\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb (%%esi), %%bl\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"decl %%ecx\n"
"jz 2f\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb 1(%%esi), %%bl\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"decl %%ecx\n"
"jz 2f\n"
"movb %%al, %%bl\n"
"shrl $8, %%eax\n"
"xorb 2(%%esi), %%bl\n"
"xorl (%%edi,%%ebx,4), %%eax\n"
"2:\n"
: "=a" (_crc)
: "0" (_crc), "g" (p), "g" (len)
: "bx", "cx", "dx", "si", "di"
);
return _crc;
}
#else /* ASM_CRC */
static u32
calc_crc32( u32 crc, u8 *p, u32 len )
{
@ -1642,9 +1556,6 @@ calc_crc32( u32 crc, u8 *p, u32 len )
return crc;
}
#endif /* ASM_CRC */
static u32 crc32tab[] __attribute__ ((aligned(8))) = {
0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37,
0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E,