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Differential D7418 Diff 19238 sys/cddl/boot/zfs/fletcher.c

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sys/cddl/boot/zfs/fletcher.c

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* *
* CDDL HEADER END * CDDL HEADER END
*/ */
/* /*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms. * Use is subject to license terms.
*/ */
/*#pragma ident "%Z%%M% %I% %E% SMI"*/
static void static void
fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp) fletcher_2_native(const void *buf, uint64_t size,
const void *ctx_template __unused, zio_cksum_t *zcp)
{ {
const uint64_t *ip = buf; const uint64_t *ip = buf;
const uint64_t *ipend = ip + (size / sizeof (uint64_t)); const uint64_t *ipend = ip + (size / sizeof (uint64_t));
uint64_t a0, b0, a1, b1; uint64_t a0, b0, a1, b1;
for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
a0 += ip[0]; a0 += ip[0];
a1 += ip[1]; a1 += ip[1];
b0 += a0; b0 += a0;
b1 += a1; b1 += a1;
} }
ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
} }
static void static void
fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) fletcher_2_byteswap(const void *buf, uint64_t size,
const void *ctx_template __unused, zio_cksum_t *zcp)
{ {
const uint64_t *ip = buf; const uint64_t *ip = buf;
const uint64_t *ipend = ip + (size / sizeof (uint64_t)); const uint64_t *ipend = ip + (size / sizeof (uint64_t));
uint64_t a0, b0, a1, b1; uint64_t a0, b0, a1, b1;
for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
a0 += BSWAP_64(ip[0]); a0 += BSWAP_64(ip[0]);
a1 += BSWAP_64(ip[1]); a1 += BSWAP_64(ip[1]);
b0 += a0; b0 += a0;
b1 += a1; b1 += a1;
} }
ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
} }
static void static void
fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp) fletcher_4_native(const void *buf, uint64_t size,
const void *ctx_template __unused, zio_cksum_t *zcp)
{ {
const uint32_t *ip = buf; const uint32_t *ip = buf;
const uint32_t *ipend = ip + (size / sizeof (uint32_t)); const uint32_t *ipend = ip + (size / sizeof (uint32_t));
uint64_t a, b, c, d; uint64_t a, b, c, d;
for (a = b = c = d = 0; ip < ipend; ip++) { for (a = b = c = d = 0; ip < ipend; ip++) {
a += ip[0]; a += ip[0];
b += a; b += a;
c += b; c += b;
d += c; d += c;
} }
ZIO_SET_CHECKSUM(zcp, a, b, c, d); ZIO_SET_CHECKSUM(zcp, a, b, c, d);
} }
static void static void
fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) fletcher_4_byteswap(const void *buf, uint64_t size,
const void *ctx_template __unused, zio_cksum_t *zcp)
{ {
const uint32_t *ip = buf; const uint32_t *ip = buf;
const uint32_t *ipend = ip + (size / sizeof (uint32_t)); const uint32_t *ipend = ip + (size / sizeof (uint32_t));
uint64_t a, b, c, d; uint64_t a, b, c, d;
for (a = b = c = d = 0; ip < ipend; ip++) { for (a = b = c = d = 0; ip < ipend; ip++) {
a += BSWAP_32(ip[0]); a += BSWAP_32(ip[0]);
b += a; b += a;
c += b; c += b;
d += c; d += c;
} }
ZIO_SET_CHECKSUM(zcp, a, b, c, d); ZIO_SET_CHECKSUM(zcp, a, b, c, d);
} }