mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 10:19:47 +00:00
![Dirk Müller](/assets/img/avatar_default.png)
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>
470 lines
17 KiB
C
470 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* -*- linux-c -*- ------------------------------------------------------- *
|
|
*
|
|
* Copyright (C) 2012 Intel Corporation
|
|
* Author: Yuanhan Liu <yuanhan.liu@linux.intel.com>
|
|
*
|
|
* Based on sse2.c: Copyright 2002 H. Peter Anvin - All Rights Reserved
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* AVX2 implementation of RAID-6 syndrome functions
|
|
*
|
|
*/
|
|
|
|
#include <linux/raid/pq.h>
|
|
#include "x86.h"
|
|
|
|
static const struct raid6_avx2_constants {
|
|
u64 x1d[4];
|
|
} raid6_avx2_constants __aligned(32) = {
|
|
{ 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,
|
|
0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,},
|
|
};
|
|
|
|
static int raid6_have_avx2(void)
|
|
{
|
|
return boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX);
|
|
}
|
|
|
|
/*
|
|
* Plain AVX2 implementation
|
|
*/
|
|
static void raid6_avx21_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("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
|
|
asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* Zero temp */
|
|
|
|
for (d = 0; d < bytes; d += 32) {
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
|
|
asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z0-1][d]));
|
|
asm volatile("vmovdqa %ymm2,%ymm4");/* Q[0] */
|
|
asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z0-1][d]));
|
|
for (z = z0-2; z >= 0; z--) {
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
|
|
asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm6,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm6,%ymm4,%ymm4");
|
|
asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z][d]));
|
|
}
|
|
asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm6,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm6,%ymm4,%ymm4");
|
|
|
|
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
|
|
asm volatile("vpxor %ymm2,%ymm2,%ymm2");
|
|
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vpxor %ymm4,%ymm4,%ymm4");
|
|
}
|
|
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void raid6_avx21_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("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
|
|
|
|
for (d = 0 ; d < bytes ; d += 32) {
|
|
asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d]));
|
|
asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d]));
|
|
asm volatile("vpxor %ymm4,%ymm2,%ymm2");
|
|
/* P/Q data pages */
|
|
for (z = z0-1 ; z >= start ; z--) {
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d]));
|
|
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
}
|
|
/* P/Q left side optimization */
|
|
for (z = start-1 ; z >= 0 ; z--) {
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
}
|
|
asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d]));
|
|
/* Don't use movntdq for r/w memory area < cache line */
|
|
asm volatile("vmovdqa %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vmovdqa %%ymm2,%0" : "=m" (p[d]));
|
|
}
|
|
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
const struct raid6_calls raid6_avx2x1 = {
|
|
raid6_avx21_gen_syndrome,
|
|
raid6_avx21_xor_syndrome,
|
|
raid6_have_avx2,
|
|
"avx2x1",
|
|
.priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */
|
|
};
|
|
|
|
/*
|
|
* Unrolled-by-2 AVX2 implementation
|
|
*/
|
|
static void raid6_avx22_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("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
|
|
asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */
|
|
|
|
/* We uniformly assume a single prefetch covers at least 32 bytes */
|
|
for (d = 0; d < bytes; d += 64) {
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d]));
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z0][d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */
|
|
asm volatile("vmovdqa %0,%%ymm3" : : "m" (dptr[z0][d+32]));/* P[1] */
|
|
asm volatile("vmovdqa %ymm2,%ymm4"); /* Q[0] */
|
|
asm volatile("vmovdqa %ymm3,%ymm6"); /* Q[1] */
|
|
for (z = z0-1; z >= 0; z--) {
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32]));
|
|
asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d]));
|
|
asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32]));
|
|
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
}
|
|
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
|
|
asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32]));
|
|
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32]));
|
|
}
|
|
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void raid6_avx22_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("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
|
|
|
|
for (d = 0 ; d < bytes ; d += 64) {
|
|
asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d]));
|
|
asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d]));
|
|
asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32]));
|
|
asm volatile("vpxor %ymm4,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm6,%ymm3,%ymm3");
|
|
/* P/Q data pages */
|
|
for (z = z0-1 ; z >= start ; z--) {
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm7,%ymm7,%ymm7");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d]));
|
|
asm volatile("vmovdqa %0,%%ymm7"
|
|
:: "m" (dptr[z][d+32]));
|
|
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
}
|
|
/* P/Q left side optimization */
|
|
for (z = start-1 ; z >= 0 ; z--) {
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm7,%ymm7,%ymm7");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
}
|
|
asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d]));
|
|
asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32]));
|
|
/* Don't use movntdq for r/w memory area < cache line */
|
|
asm volatile("vmovdqa %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vmovdqa %%ymm6,%0" : "=m" (q[d+32]));
|
|
asm volatile("vmovdqa %%ymm2,%0" : "=m" (p[d]));
|
|
asm volatile("vmovdqa %%ymm3,%0" : "=m" (p[d+32]));
|
|
}
|
|
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
const struct raid6_calls raid6_avx2x2 = {
|
|
raid6_avx22_gen_syndrome,
|
|
raid6_avx22_xor_syndrome,
|
|
raid6_have_avx2,
|
|
"avx2x2",
|
|
.priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */
|
|
};
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
/*
|
|
* Unrolled-by-4 AVX2 implementation
|
|
*/
|
|
static void raid6_avx24_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("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0]));
|
|
asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */
|
|
asm volatile("vpxor %ymm2,%ymm2,%ymm2"); /* P[0] */
|
|
asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* P[1] */
|
|
asm volatile("vpxor %ymm4,%ymm4,%ymm4"); /* Q[0] */
|
|
asm volatile("vpxor %ymm6,%ymm6,%ymm6"); /* Q[1] */
|
|
asm volatile("vpxor %ymm10,%ymm10,%ymm10"); /* P[2] */
|
|
asm volatile("vpxor %ymm11,%ymm11,%ymm11"); /* P[3] */
|
|
asm volatile("vpxor %ymm12,%ymm12,%ymm12"); /* Q[2] */
|
|
asm volatile("vpxor %ymm14,%ymm14,%ymm14"); /* Q[3] */
|
|
|
|
for (d = 0; d < bytes; d += 128) {
|
|
for (z = z0; z >= 0; z--) {
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d]));
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32]));
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+64]));
|
|
asm volatile("prefetchnta %0" : : "m" (dptr[z][d+96]));
|
|
asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7");
|
|
asm volatile("vpcmpgtb %ymm12,%ymm1,%ymm13");
|
|
asm volatile("vpcmpgtb %ymm14,%ymm1,%ymm15");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpaddb %ymm12,%ymm12,%ymm12");
|
|
asm volatile("vpaddb %ymm14,%ymm14,%ymm14");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpand %ymm0,%ymm13,%ymm13");
|
|
asm volatile("vpand %ymm0,%ymm15,%ymm15");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
|
|
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
|
|
asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d]));
|
|
asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm13" : : "m" (dptr[z][d+64]));
|
|
asm volatile("vmovdqa %0,%%ymm15" : : "m" (dptr[z][d+96]));
|
|
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
|
|
asm volatile("vpxor %ymm13,%ymm10,%ymm10");
|
|
asm volatile("vpxor %ymm15,%ymm11,%ymm11");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
|
|
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
|
|
}
|
|
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
|
|
asm volatile("vpxor %ymm2,%ymm2,%ymm2");
|
|
asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32]));
|
|
asm volatile("vpxor %ymm3,%ymm3,%ymm3");
|
|
asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64]));
|
|
asm volatile("vpxor %ymm10,%ymm10,%ymm10");
|
|
asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96]));
|
|
asm volatile("vpxor %ymm11,%ymm11,%ymm11");
|
|
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vpxor %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32]));
|
|
asm volatile("vpxor %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64]));
|
|
asm volatile("vpxor %ymm12,%ymm12,%ymm12");
|
|
asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96]));
|
|
asm volatile("vpxor %ymm14,%ymm14,%ymm14");
|
|
}
|
|
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
static void raid6_avx24_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("vmovdqa %0,%%ymm0" :: "m" (raid6_avx2_constants.x1d[0]));
|
|
|
|
for (d = 0 ; d < bytes ; d += 128) {
|
|
asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d]));
|
|
asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm12" :: "m" (dptr[z0][d+64]));
|
|
asm volatile("vmovdqa %0,%%ymm14" :: "m" (dptr[z0][d+96]));
|
|
asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d]));
|
|
asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm10" : : "m" (p[d+64]));
|
|
asm volatile("vmovdqa %0,%%ymm11" : : "m" (p[d+96]));
|
|
asm volatile("vpxor %ymm4,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm6,%ymm3,%ymm3");
|
|
asm volatile("vpxor %ymm12,%ymm10,%ymm10");
|
|
asm volatile("vpxor %ymm14,%ymm11,%ymm11");
|
|
/* P/Q data pages */
|
|
for (z = z0-1 ; z >= start ; z--) {
|
|
asm volatile("prefetchnta %0" :: "m" (dptr[z][d]));
|
|
asm volatile("prefetchnta %0" :: "m" (dptr[z][d+64]));
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm7,%ymm7,%ymm7");
|
|
asm volatile("vpxor %ymm13,%ymm13,%ymm13");
|
|
asm volatile("vpxor %ymm15,%ymm15,%ymm15");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7");
|
|
asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13");
|
|
asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpaddb %ymm12,%ymm12,%ymm12");
|
|
asm volatile("vpaddb %ymm14,%ymm14,%ymm14");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpand %ymm0,%ymm13,%ymm13");
|
|
asm volatile("vpand %ymm0,%ymm15,%ymm15");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
|
|
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
|
|
asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d]));
|
|
asm volatile("vmovdqa %0,%%ymm7"
|
|
:: "m" (dptr[z][d+32]));
|
|
asm volatile("vmovdqa %0,%%ymm13"
|
|
:: "m" (dptr[z][d+64]));
|
|
asm volatile("vmovdqa %0,%%ymm15"
|
|
:: "m" (dptr[z][d+96]));
|
|
asm volatile("vpxor %ymm5,%ymm2,%ymm2");
|
|
asm volatile("vpxor %ymm7,%ymm3,%ymm3");
|
|
asm volatile("vpxor %ymm13,%ymm10,%ymm10");
|
|
asm volatile("vpxor %ymm15,%ymm11,%ymm11");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
|
|
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
|
|
}
|
|
asm volatile("prefetchnta %0" :: "m" (q[d]));
|
|
asm volatile("prefetchnta %0" :: "m" (q[d+64]));
|
|
/* P/Q left side optimization */
|
|
for (z = start-1 ; z >= 0 ; z--) {
|
|
asm volatile("vpxor %ymm5,%ymm5,%ymm5");
|
|
asm volatile("vpxor %ymm7,%ymm7,%ymm7");
|
|
asm volatile("vpxor %ymm13,%ymm13,%ymm13");
|
|
asm volatile("vpxor %ymm15,%ymm15,%ymm15");
|
|
asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5");
|
|
asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7");
|
|
asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13");
|
|
asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15");
|
|
asm volatile("vpaddb %ymm4,%ymm4,%ymm4");
|
|
asm volatile("vpaddb %ymm6,%ymm6,%ymm6");
|
|
asm volatile("vpaddb %ymm12,%ymm12,%ymm12");
|
|
asm volatile("vpaddb %ymm14,%ymm14,%ymm14");
|
|
asm volatile("vpand %ymm0,%ymm5,%ymm5");
|
|
asm volatile("vpand %ymm0,%ymm7,%ymm7");
|
|
asm volatile("vpand %ymm0,%ymm13,%ymm13");
|
|
asm volatile("vpand %ymm0,%ymm15,%ymm15");
|
|
asm volatile("vpxor %ymm5,%ymm4,%ymm4");
|
|
asm volatile("vpxor %ymm7,%ymm6,%ymm6");
|
|
asm volatile("vpxor %ymm13,%ymm12,%ymm12");
|
|
asm volatile("vpxor %ymm15,%ymm14,%ymm14");
|
|
}
|
|
asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d]));
|
|
asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32]));
|
|
asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64]));
|
|
asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96]));
|
|
asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d]));
|
|
asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32]));
|
|
asm volatile("vpxor %0,%%ymm12,%%ymm12" : : "m" (q[d+64]));
|
|
asm volatile("vpxor %0,%%ymm14,%%ymm14" : : "m" (q[d+96]));
|
|
asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d]));
|
|
asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32]));
|
|
asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64]));
|
|
asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96]));
|
|
}
|
|
asm volatile("sfence" : : : "memory");
|
|
kernel_fpu_end();
|
|
}
|
|
|
|
const struct raid6_calls raid6_avx2x4 = {
|
|
raid6_avx24_gen_syndrome,
|
|
raid6_avx24_xor_syndrome,
|
|
raid6_have_avx2,
|
|
"avx2x4",
|
|
.priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */
|
|
};
|
|
#endif /* CONFIG_X86_64 */
|