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Vendor Unique iSCSI CRC32C

262 T10000: Interface Reference Manual August 2016

crc = crc32c_table[(crc ^ *blk_adr++) & 0xFF] ^

(crc >> 8);

}

#if defined(__sparc)

crc = (crc & 0xff000000) >> 24 |

(crc & 0xff0000) >> 8 |

(crc & 0xff00) << 8 |

(crc & 0xff) << 24;

#endif

return (crc ^ CRC32C_XOR);

}

Hardware Assist

Intel Nehalem

#if defined(__i386) || defined(__amd64) || defined(__x86_64)

/* Common Solaris and Linux code */

uint32_t

calc_crc32c_intel(char *buf, int len, uint32_t crc)

{

uint8_t *addr = (uint8_t *)buf;

int i;

int align;

int length;

/* calc crc for unaligned memory addresses */

if ((align = ((intptr_t)addr & CRC32C_ALIGN)) > 0) {

align = CRC32C_SIZE - align;

align = (align > len) ? len : align;

for (i = 0; i < align; i++) {

__asm__ __volatile__(

/* "crc32 r32, r/m8" */

".byte 0xF2, 0x0F, 0x38, 0xF0, 0xF1"

: "=S"(crc)

: "0"(crc), "c"(*addr));

addr++;

}

len -= align;

}

/* calc crc for word aligned memory addresses */

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