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linux-next/lib/raid6/avx512.c
Dirk Müller 36dacddbf0 lib/raid6: Use strict priority ranking for pq gen() benchmarking 
On x86_64, currently 3 variants of AVX512, 3 variants of AVX2
and 3 variants of SSE2 are benchmarked on initialization, taking
between 144-153 jiffies. Testing across a hardware pool of
various generations of intel cpus I could not find a single
case where SSE2 won over AVX2 or AVX512. There are cases where
AVX2 wins over AVX512 however.

Change "prefer" into an integer priority field (similar to
how recov selection works) to have more than one ranking level
available, which is backwards compatible with existing behavior.

Give AVX2/512 variants higher priority over SSE2 in order to skip
SSE testing when AVX is available. in a AVX2/x86_64/HZ=250 case this
saves in the order of 200ms of initialization time.

Signed-off-by: Dirk Müller <dmueller@suse.de>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Song Liu <song@kernel.org>
2022-01-06 08:37:03 -08:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/* -*- linux-c -*- --------------------------------------------------------
*
* Copyright (C) 2016 Intel Corporation
*
* Author: Gayatri Kammela <gayatri.kammela@intel.com>
* Author: Megha Dey <megha.dey@linux.intel.com>
*
* Based on avx2.c: Copyright 2012 Yuanhan Liu All Rights Reserved
* Based on sse2.c: Copyright 2002 H. Peter Anvin - All Rights Reserved
*
* -----------------------------------------------------------------------
*/
/*
* AVX512 implementation of RAID-6 syndrome functions
*
*/
#ifdef CONFIG_AS_AVX512
#include <linux/raid/pq.h>
#include "x86.h"
static const struct raid6_avx512_constants {
u64 x1d[8];
} raid6_avx512_constants __aligned(512/8) = {
{ 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,
0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,
0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,
0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,},
};
static int raid6_have_avx512(void)
{
return boot_cpu_has(X86_FEATURE_AVX2) &&
boot_cpu_has(X86_FEATURE_AVX) &&
boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512BW) &&
boot_cpu_has(X86_FEATURE_AVX512VL) &&
boot_cpu_has(X86_FEATURE_AVX512DQ);
}
static void raid6_avx5121_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0\n\t"
"vpxorq %%zmm1,%%zmm1,%%zmm1" /* Zero temp */
:
: "m" (raid6_avx512_constants.x1d[0]));
for (d = 0; d < bytes; d += 64) {
asm volatile("prefetchnta %0\n\t"
"vmovdqa64 %0,%%zmm2\n\t" /* P[0] */
"prefetchnta %1\n\t"
"vmovdqa64 %%zmm2,%%zmm4\n\t" /* Q[0] */
"vmovdqa64 %1,%%zmm6"
:
: "m" (dptr[z0][d]), "m" (dptr[z0-1][d]));
for (z = z0-2; z >= 0; z--) {
asm volatile("prefetchnta %0\n\t"
"vpcmpgtb %%zmm4,%%zmm1,%%k1\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm6,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm6,%%zmm4,%%zmm4\n\t"
"vmovdqa64 %0,%%zmm6"
:
: "m" (dptr[z][d]));
}
asm volatile("vpcmpgtb %%zmm4,%%zmm1,%%k1\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm6,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm6,%%zmm4,%%zmm4\n\t"
"vmovntdq %%zmm2,%0\n\t"
"vpxorq %%zmm2,%%zmm2,%%zmm2\n\t"
"vmovntdq %%zmm4,%1\n\t"
"vpxorq %%zmm4,%%zmm4,%%zmm4"
:
: "m" (p[d]), "m" (q[d]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
static void raid6_avx5121_xor_syndrome(int disks, int start, int stop,
size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = stop; /* P/Q right side optimization */
p = dptr[disks-2]; /* XOR parity */
q = dptr[disks-1]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0"
: : "m" (raid6_avx512_constants.x1d[0]));
for (d = 0 ; d < bytes ; d += 64) {
asm volatile("vmovdqa64 %0,%%zmm4\n\t"
"vmovdqa64 %1,%%zmm2\n\t"
"vpxorq %%zmm4,%%zmm2,%%zmm2"
:
: "m" (dptr[z0][d]), "m" (p[d]));
/* P/Q data pages */
for (z = z0-1 ; z >= start ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vmovdqa64 %0,%%zmm5\n\t"
"vpxorq %%zmm5,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4"
:
: "m" (dptr[z][d]));
}
/* P/Q left side optimization */
for (z = start-1 ; z >= 0 ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4"
:
: );
}
asm volatile("vpxorq %0,%%zmm4,%%zmm4\n\t"
/* Don't use movntdq for r/w memory area < cache line */
"vmovdqa64 %%zmm4,%0\n\t"
"vmovdqa64 %%zmm2,%1"
:
: "m" (q[d]), "m" (p[d]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx512x1 = {
raid6_avx5121_gen_syndrome,
raid6_avx5121_xor_syndrome,
raid6_have_avx512,
"avx512x1",
.priority = 2 /* Prefer AVX512 over priority 1 (SSE2 and others) */
};
/*
* Unrolled-by-2 AVX512 implementation
*/
static void raid6_avx5122_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0\n\t"
"vpxorq %%zmm1,%%zmm1,%%zmm1" /* Zero temp */
:
: "m" (raid6_avx512_constants.x1d[0]));
/* We uniformly assume a single prefetch covers at least 64 bytes */
for (d = 0; d < bytes; d += 128) {
asm volatile("prefetchnta %0\n\t"
"prefetchnta %1\n\t"
"vmovdqa64 %0,%%zmm2\n\t" /* P[0] */
"vmovdqa64 %1,%%zmm3\n\t" /* P[1] */
"vmovdqa64 %%zmm2,%%zmm4\n\t" /* Q[0] */
"vmovdqa64 %%zmm3,%%zmm6" /* Q[1] */
:
: "m" (dptr[z0][d]), "m" (dptr[z0][d+64]));
for (z = z0-1; z >= 0; z--) {
asm volatile("prefetchnta %0\n\t"
"prefetchnta %1\n\t"
"vpcmpgtb %%zmm4,%%zmm1,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm1,%%k2\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vmovdqa64 %0,%%zmm5\n\t"
"vmovdqa64 %1,%%zmm7\n\t"
"vpxorq %%zmm5,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm7,%%zmm3,%%zmm3\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6"
:
: "m" (dptr[z][d]), "m" (dptr[z][d+64]));
}
asm volatile("vmovntdq %%zmm2,%0\n\t"
"vmovntdq %%zmm3,%1\n\t"
"vmovntdq %%zmm4,%2\n\t"
"vmovntdq %%zmm6,%3"
:
: "m" (p[d]), "m" (p[d+64]), "m" (q[d]),
"m" (q[d+64]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
static void raid6_avx5122_xor_syndrome(int disks, int start, int stop,
size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = stop; /* P/Q right side optimization */
p = dptr[disks-2]; /* XOR parity */
q = dptr[disks-1]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0"
: : "m" (raid6_avx512_constants.x1d[0]));
for (d = 0 ; d < bytes ; d += 128) {
asm volatile("vmovdqa64 %0,%%zmm4\n\t"
"vmovdqa64 %1,%%zmm6\n\t"
"vmovdqa64 %2,%%zmm2\n\t"
"vmovdqa64 %3,%%zmm3\n\t"
"vpxorq %%zmm4,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm6,%%zmm3,%%zmm3"
:
: "m" (dptr[z0][d]), "m" (dptr[z0][d+64]),
"m" (p[d]), "m" (p[d+64]));
/* P/Q data pages */
for (z = z0-1 ; z >= start ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm7,%%zmm7,%%zmm7\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm7,%%k2\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vmovdqa64 %0,%%zmm5\n\t"
"vmovdqa64 %1,%%zmm7\n\t"
"vpxorq %%zmm5,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm7,%%zmm3,%%zmm3\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6"
:
: "m" (dptr[z][d]), "m" (dptr[z][d+64]));
}
/* P/Q left side optimization */
for (z = start-1 ; z >= 0 ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm7,%%zmm7,%%zmm7\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm7,%%k2\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6"
:
: );
}
asm volatile("vpxorq %0,%%zmm4,%%zmm4\n\t"
"vpxorq %1,%%zmm6,%%zmm6\n\t"
/* Don't use movntdq for r/w
* memory area < cache line
*/
"vmovdqa64 %%zmm4,%0\n\t"
"vmovdqa64 %%zmm6,%1\n\t"
"vmovdqa64 %%zmm2,%2\n\t"
"vmovdqa64 %%zmm3,%3"
:
: "m" (q[d]), "m" (q[d+64]), "m" (p[d]),
"m" (p[d+64]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx512x2 = {
raid6_avx5122_gen_syndrome,
raid6_avx5122_xor_syndrome,
raid6_have_avx512,
"avx512x2",
.priority = 2 /* Prefer AVX512 over priority 1 (SSE2 and others) */
};
#ifdef CONFIG_X86_64
/*
* Unrolled-by-4 AVX2 implementation
*/
static void raid6_avx5124_gen_syndrome(int disks, size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = disks - 3; /* Highest data disk */
p = dptr[z0+1]; /* XOR parity */
q = dptr[z0+2]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0\n\t"
"vpxorq %%zmm1,%%zmm1,%%zmm1\n\t" /* Zero temp */
"vpxorq %%zmm2,%%zmm2,%%zmm2\n\t" /* P[0] */
"vpxorq %%zmm3,%%zmm3,%%zmm3\n\t" /* P[1] */
"vpxorq %%zmm4,%%zmm4,%%zmm4\n\t" /* Q[0] */
"vpxorq %%zmm6,%%zmm6,%%zmm6\n\t" /* Q[1] */
"vpxorq %%zmm10,%%zmm10,%%zmm10\n\t" /* P[2] */
"vpxorq %%zmm11,%%zmm11,%%zmm11\n\t" /* P[3] */
"vpxorq %%zmm12,%%zmm12,%%zmm12\n\t" /* Q[2] */
"vpxorq %%zmm14,%%zmm14,%%zmm14" /* Q[3] */
:
: "m" (raid6_avx512_constants.x1d[0]));
for (d = 0; d < bytes; d += 256) {
for (z = z0; z >= 0; z--) {
asm volatile("prefetchnta %0\n\t"
"prefetchnta %1\n\t"
"prefetchnta %2\n\t"
"prefetchnta %3\n\t"
"vpcmpgtb %%zmm4,%%zmm1,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm1,%%k2\n\t"
"vpcmpgtb %%zmm12,%%zmm1,%%k3\n\t"
"vpcmpgtb %%zmm14,%%zmm1,%%k4\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpmovm2b %%k3,%%zmm13\n\t"
"vpmovm2b %%k4,%%zmm15\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpaddb %%zmm12,%%zmm12,%%zmm12\n\t"
"vpaddb %%zmm14,%%zmm14,%%zmm14\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpandq %%zmm0,%%zmm13,%%zmm13\n\t"
"vpandq %%zmm0,%%zmm15,%%zmm15\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vpxorq %%zmm13,%%zmm12,%%zmm12\n\t"
"vpxorq %%zmm15,%%zmm14,%%zmm14\n\t"
"vmovdqa64 %0,%%zmm5\n\t"
"vmovdqa64 %1,%%zmm7\n\t"
"vmovdqa64 %2,%%zmm13\n\t"
"vmovdqa64 %3,%%zmm15\n\t"
"vpxorq %%zmm5,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm7,%%zmm3,%%zmm3\n\t"
"vpxorq %%zmm13,%%zmm10,%%zmm10\n\t"
"vpxorq %%zmm15,%%zmm11,%%zmm11\n"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vpxorq %%zmm13,%%zmm12,%%zmm12\n\t"
"vpxorq %%zmm15,%%zmm14,%%zmm14"
:
: "m" (dptr[z][d]), "m" (dptr[z][d+64]),
"m" (dptr[z][d+128]), "m" (dptr[z][d+192]));
}
asm volatile("vmovntdq %%zmm2,%0\n\t"
"vpxorq %%zmm2,%%zmm2,%%zmm2\n\t"
"vmovntdq %%zmm3,%1\n\t"
"vpxorq %%zmm3,%%zmm3,%%zmm3\n\t"
"vmovntdq %%zmm10,%2\n\t"
"vpxorq %%zmm10,%%zmm10,%%zmm10\n\t"
"vmovntdq %%zmm11,%3\n\t"
"vpxorq %%zmm11,%%zmm11,%%zmm11\n\t"
"vmovntdq %%zmm4,%4\n\t"
"vpxorq %%zmm4,%%zmm4,%%zmm4\n\t"
"vmovntdq %%zmm6,%5\n\t"
"vpxorq %%zmm6,%%zmm6,%%zmm6\n\t"
"vmovntdq %%zmm12,%6\n\t"
"vpxorq %%zmm12,%%zmm12,%%zmm12\n\t"
"vmovntdq %%zmm14,%7\n\t"
"vpxorq %%zmm14,%%zmm14,%%zmm14"
:
: "m" (p[d]), "m" (p[d+64]), "m" (p[d+128]),
"m" (p[d+192]), "m" (q[d]), "m" (q[d+64]),
"m" (q[d+128]), "m" (q[d+192]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
static void raid6_avx5124_xor_syndrome(int disks, int start, int stop,
size_t bytes, void **ptrs)
{
u8 **dptr = (u8 **)ptrs;
u8 *p, *q;
int d, z, z0;
z0 = stop; /* P/Q right side optimization */
p = dptr[disks-2]; /* XOR parity */
q = dptr[disks-1]; /* RS syndrome */
kernel_fpu_begin();
asm volatile("vmovdqa64 %0,%%zmm0"
:: "m" (raid6_avx512_constants.x1d[0]));
for (d = 0 ; d < bytes ; d += 256) {
asm volatile("vmovdqa64 %0,%%zmm4\n\t"
"vmovdqa64 %1,%%zmm6\n\t"
"vmovdqa64 %2,%%zmm12\n\t"
"vmovdqa64 %3,%%zmm14\n\t"
"vmovdqa64 %4,%%zmm2\n\t"
"vmovdqa64 %5,%%zmm3\n\t"
"vmovdqa64 %6,%%zmm10\n\t"
"vmovdqa64 %7,%%zmm11\n\t"
"vpxorq %%zmm4,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm6,%%zmm3,%%zmm3\n\t"
"vpxorq %%zmm12,%%zmm10,%%zmm10\n\t"
"vpxorq %%zmm14,%%zmm11,%%zmm11"
:
: "m" (dptr[z0][d]), "m" (dptr[z0][d+64]),
"m" (dptr[z0][d+128]), "m" (dptr[z0][d+192]),
"m" (p[d]), "m" (p[d+64]), "m" (p[d+128]),
"m" (p[d+192]));
/* P/Q data pages */
for (z = z0-1 ; z >= start ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm7,%%zmm7,%%zmm7\n\t"
"vpxorq %%zmm13,%%zmm13,%%zmm13\n\t"
"vpxorq %%zmm15,%%zmm15,%%zmm15\n\t"
"prefetchnta %0\n\t"
"prefetchnta %2\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm7,%%k2\n\t"
"vpcmpgtb %%zmm12,%%zmm13,%%k3\n\t"
"vpcmpgtb %%zmm14,%%zmm15,%%k4\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpmovm2b %%k3,%%zmm13\n\t"
"vpmovm2b %%k4,%%zmm15\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpaddb %%zmm12,%%zmm12,%%zmm12\n\t"
"vpaddb %%Zmm14,%%zmm14,%%zmm14\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpandq %%zmm0,%%zmm13,%%zmm13\n\t"
"vpandq %%zmm0,%%zmm15,%%zmm15\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vpxorq %%zmm13,%%zmm12,%%zmm12\n\t"
"vpxorq %%zmm15,%%zmm14,%%zmm14\n\t"
"vmovdqa64 %0,%%zmm5\n\t"
"vmovdqa64 %1,%%zmm7\n\t"
"vmovdqa64 %2,%%zmm13\n\t"
"vmovdqa64 %3,%%zmm15\n\t"
"vpxorq %%zmm5,%%zmm2,%%zmm2\n\t"
"vpxorq %%zmm7,%%zmm3,%%zmm3\n\t"
"vpxorq %%zmm13,%%zmm10,%%zmm10\n\t"
"vpxorq %%zmm15,%%zmm11,%%zmm11\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vpxorq %%zmm13,%%zmm12,%%zmm12\n\t"
"vpxorq %%zmm15,%%zmm14,%%zmm14"
:
: "m" (dptr[z][d]), "m" (dptr[z][d+64]),
"m" (dptr[z][d+128]),
"m" (dptr[z][d+192]));
}
asm volatile("prefetchnta %0\n\t"
"prefetchnta %1\n\t"
:
: "m" (q[d]), "m" (q[d+128]));
/* P/Q left side optimization */
for (z = start-1 ; z >= 0 ; z--) {
asm volatile("vpxorq %%zmm5,%%zmm5,%%zmm5\n\t"
"vpxorq %%zmm7,%%zmm7,%%zmm7\n\t"
"vpxorq %%zmm13,%%zmm13,%%zmm13\n\t"
"vpxorq %%zmm15,%%zmm15,%%zmm15\n\t"
"vpcmpgtb %%zmm4,%%zmm5,%%k1\n\t"
"vpcmpgtb %%zmm6,%%zmm7,%%k2\n\t"
"vpcmpgtb %%zmm12,%%zmm13,%%k3\n\t"
"vpcmpgtb %%zmm14,%%zmm15,%%k4\n\t"
"vpmovm2b %%k1,%%zmm5\n\t"
"vpmovm2b %%k2,%%zmm7\n\t"
"vpmovm2b %%k3,%%zmm13\n\t"
"vpmovm2b %%k4,%%zmm15\n\t"
"vpaddb %%zmm4,%%zmm4,%%zmm4\n\t"
"vpaddb %%zmm6,%%zmm6,%%zmm6\n\t"
"vpaddb %%zmm12,%%zmm12,%%zmm12\n\t"
"vpaddb %%zmm14,%%zmm14,%%zmm14\n\t"
"vpandq %%zmm0,%%zmm5,%%zmm5\n\t"
"vpandq %%zmm0,%%zmm7,%%zmm7\n\t"
"vpandq %%zmm0,%%zmm13,%%zmm13\n\t"
"vpandq %%zmm0,%%zmm15,%%zmm15\n\t"
"vpxorq %%zmm5,%%zmm4,%%zmm4\n\t"
"vpxorq %%zmm7,%%zmm6,%%zmm6\n\t"
"vpxorq %%zmm13,%%zmm12,%%zmm12\n\t"
"vpxorq %%zmm15,%%zmm14,%%zmm14"
:
: );
}
asm volatile("vmovntdq %%zmm2,%0\n\t"
"vmovntdq %%zmm3,%1\n\t"
"vmovntdq %%zmm10,%2\n\t"
"vmovntdq %%zmm11,%3\n\t"
"vpxorq %4,%%zmm4,%%zmm4\n\t"
"vpxorq %5,%%zmm6,%%zmm6\n\t"
"vpxorq %6,%%zmm12,%%zmm12\n\t"
"vpxorq %7,%%zmm14,%%zmm14\n\t"
"vmovntdq %%zmm4,%4\n\t"
"vmovntdq %%zmm6,%5\n\t"
"vmovntdq %%zmm12,%6\n\t"
"vmovntdq %%zmm14,%7"
:
: "m" (p[d]), "m" (p[d+64]), "m" (p[d+128]),
"m" (p[d+192]), "m" (q[d]), "m" (q[d+64]),
"m" (q[d+128]), "m" (q[d+192]));
}
asm volatile("sfence" : : : "memory");
kernel_fpu_end();
}
const struct raid6_calls raid6_avx512x4 = {
raid6_avx5124_gen_syndrome,
raid6_avx5124_xor_syndrome,
raid6_have_avx512,
"avx512x4",
.priority = 2 /* Prefer AVX512 over priority 1 (SSE2 and others) */
};
#endif
#endif /* CONFIG_AS_AVX512 */
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