/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* include/asm-generic/xor.h
*
* Generic optimized RAID-5 checksumming functions.
*/
#include <linux/prefetch.h>
static void
xor_8regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_8regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_8regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_8regs_5(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4,
const unsigned long * __restrict p5)
{
long lines = bytes / (sizeof (long)) / 8;
do {
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
static void
xor_32regs_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
}
static void
xor_32regs_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
}
static void
xor_32regs_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
}
static void
xor_32regs_5(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4,
const unsigned long * __restrict p5)
{
long lines = bytes / (sizeof (long)) / 8;
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
}
static void
xor_8regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
prefetchw(p1+8);
prefetch(p2+8);
once_more:
p1[0] ^= p2[0];
p1[1] ^= p2[1];
p1[2] ^= p2[2];
p1[3] ^= p2[3];
p1[4] ^= p2[4];
p1[5] ^= p2[5];
p1[6] ^= p2[6];
p1[7] ^= p2[7];
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
p1[0] ^= p2[0] ^ p3[0];
p1[1] ^= p2[1] ^ p3[1];
p1[2] ^= p2[2] ^ p3[2];
p1[3] ^= p2[3] ^ p3[3];
p1[4] ^= p2[4] ^ p3[4];
p1[5] ^= p2[5] ^ p3[5];
p1[6] ^= p2[6] ^ p3[6];
p1[7] ^= p2[7] ^ p3[7];
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_8regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4,
const unsigned long * __restrict p5)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0];
p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1];
p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2];
p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3];
p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4];
p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5];
p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6];
p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7];
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_2(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_3(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_4(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static void
xor_32regs_p_5(unsigned long bytes, unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4,
const unsigned long * __restrict p5)
{
long lines = bytes / (sizeof (long)) / 8 - 1;
prefetchw(p1);
prefetch(p2);
prefetch(p3);
prefetch(p4);
prefetch(p5);
do {
register long d0, d1, d2, d3, d4, d5, d6, d7;
prefetchw(p1+8);
prefetch(p2+8);
prefetch(p3+8);
prefetch(p4+8);
prefetch(p5+8);
once_more:
d0 = p1[0]; /* Pull the stuff into registers */
d1 = p1[1]; /* ... in bursts, if possible. */
d2 = p1[2];
d3 = p1[3];
d4 = p1[4];
d5 = p1[5];
d6 = p1[6];
d7 = p1[7];
d0 ^= p2[0];
d1 ^= p2[1];
d2 ^= p2[2];
d3 ^= p2[3];
d4 ^= p2[4];
d5 ^= p2[5];
d6 ^= p2[6];
d7 ^= p2[7];
d0 ^= p3[0];
d1 ^= p3[1];
d2 ^= p3[2];
d3 ^= p3[3];
d4 ^= p3[4];
d5 ^= p3[5];
d6 ^= p3[6];
d7 ^= p3[7];
d0 ^= p4[0];
d1 ^= p4[1];
d2 ^= p4[2];
d3 ^= p4[3];
d4 ^= p4[4];
d5 ^= p4[5];
d6 ^= p4[6];
d7 ^= p4[7];
d0 ^= p5[0];
d1 ^= p5[1];
d2 ^= p5[2];
d3 ^= p5[3];
d4 ^= p5[4];
d5 ^= p5[5];
d6 ^= p5[6];
d7 ^= p5[7];
p1[0] = d0; /* Store the result (in bursts) */
p1[1] = d1;
p1[2] = d2;
p1[3] = d3;
p1[4] = d4;
p1[5] = d5;
p1[6] = d6;
p1[7] = d7;
p1 += 8;
p2 += 8;
p3 += 8;
p4 += 8;
p5 += 8;
} while (--lines > 0);
if (lines == 0)
goto once_more;
}
static struct xor_block_template xor_block_8regs = {
.name = "8regs",
.do_2 = xor_8regs_2,
.do_3 = xor_8regs_3,
.do_4 = xor_8regs_4,
.do_5 = xor_8regs_5,
};
static struct xor_block_template xor_block_32regs = {
.name = "32regs",
.do_2 = xor_32regs_2,
.do_3 = xor_32regs_3,
.do_4 = xor_32regs_4,
.do_5 = xor_32regs_5,
};
static struct xor_block_template xor_block_8regs_p __maybe_unused = {
.name = "8regs_prefetch",
.do_2 = xor_8regs_p_2,
.do_3 = xor_8regs_p_3,
.do_4 = xor_8regs_p_4,
.do_5 = xor_8regs_p_5,
};
static struct xor_block_template xor_block_32regs_p __maybe_unused = {
.name = "32regs_prefetch",
.do_2 = xor_32regs_p_2,
.do_3 = xor_32regs_p_3,
.do_4 = xor_32regs_p_4,
.do_5 = xor_32regs_p_5,
};
#define XOR_TRY_TEMPLATES \
do { \
xor_speed(&xor_block_8regs); \
xor_speed(&xor_block_8regs_p); \
xor_speed(&xor_block_32regs); \
xor_speed(&xor_block_32regs_p); \
} while (0)
