Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jim Kukunas |
456 |
79.17% |
1 |
9.09% |
| Christoph Hellwig |
53 |
9.20% |
4 |
36.36% |
| Andi Kleen |
32 |
5.56% |
1 |
9.09% |
| Ard Biesheuvel |
24 |
4.17% |
1 |
9.09% |
| Dan J Williams |
5 |
0.87% |
1 |
9.09% |
| Suresh B. Siddha |
3 |
0.52% |
1 |
9.09% |
| Linus Torvalds (pre-git) |
2 |
0.35% |
1 |
9.09% |
| Neil Brown |
1 |
0.17% |
1 |
9.09% |
| Total |
576 |
|
11 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Optimized XOR parity functions for AVX
*
* Copyright (C) 2012 Intel Corporation
* Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
*
* Based on Ingo Molnar and Zach Brown's respective MMX and SSE routines
*/
#include <linux/compiler.h>
#include <asm/fpu/api.h>
#include "xor_impl.h"
#include "xor_arch.h"
#define BLOCK4(i) \
BLOCK(32 * i, 0) \
BLOCK(32 * (i + 1), 1) \
BLOCK(32 * (i + 2), 2) \
BLOCK(32 * (i + 3), 3)
#define BLOCK16() \
BLOCK4(0) \
BLOCK4(4) \
BLOCK4(8) \
BLOCK4(12)
static void xor_avx_2(unsigned long bytes, unsigned long * __restrict p0,
const unsigned long * __restrict p1)
{
unsigned long lines = bytes >> 9;
while (lines--) {
#undef BLOCK
#define BLOCK(i, reg) \
do { \
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p1[i / sizeof(*p1)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p0[i / sizeof(*p0)])); \
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
"=m" (p0[i / sizeof(*p0)])); \
} while (0);
BLOCK16()
p0 = (unsigned long *)((uintptr_t)p0 + 512);
p1 = (unsigned long *)((uintptr_t)p1 + 512);
}
}
static void xor_avx_3(unsigned long bytes, unsigned long * __restrict p0,
const unsigned long * __restrict p1,
const unsigned long * __restrict p2)
{
unsigned long lines = bytes >> 9;
while (lines--) {
#undef BLOCK
#define BLOCK(i, reg) \
do { \
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p2[i / sizeof(*p2)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p1[i / sizeof(*p1)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p0[i / sizeof(*p0)])); \
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
"=m" (p0[i / sizeof(*p0)])); \
} while (0);
BLOCK16()
p0 = (unsigned long *)((uintptr_t)p0 + 512);
p1 = (unsigned long *)((uintptr_t)p1 + 512);
p2 = (unsigned long *)((uintptr_t)p2 + 512);
}
}
static void xor_avx_4(unsigned long bytes, unsigned long * __restrict p0,
const unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3)
{
unsigned long lines = bytes >> 9;
while (lines--) {
#undef BLOCK
#define BLOCK(i, reg) \
do { \
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p3[i / sizeof(*p3)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p2[i / sizeof(*p2)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p1[i / sizeof(*p1)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p0[i / sizeof(*p0)])); \
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
"=m" (p0[i / sizeof(*p0)])); \
} while (0);
BLOCK16();
p0 = (unsigned long *)((uintptr_t)p0 + 512);
p1 = (unsigned long *)((uintptr_t)p1 + 512);
p2 = (unsigned long *)((uintptr_t)p2 + 512);
p3 = (unsigned long *)((uintptr_t)p3 + 512);
}
}
static void xor_avx_5(unsigned long bytes, unsigned long * __restrict p0,
const unsigned long * __restrict p1,
const unsigned long * __restrict p2,
const unsigned long * __restrict p3,
const unsigned long * __restrict p4)
{
unsigned long lines = bytes >> 9;
while (lines--) {
#undef BLOCK
#define BLOCK(i, reg) \
do { \
asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p4[i / sizeof(*p4)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p3[i / sizeof(*p3)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p2[i / sizeof(*p2)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p1[i / sizeof(*p1)])); \
asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
"m" (p0[i / sizeof(*p0)])); \
asm volatile("vmovdqa %%ymm" #reg ", %0" : \
"=m" (p0[i / sizeof(*p0)])); \
} while (0);
BLOCK16()
p0 = (unsigned long *)((uintptr_t)p0 + 512);
p1 = (unsigned long *)((uintptr_t)p1 + 512);
p2 = (unsigned long *)((uintptr_t)p2 + 512);
p3 = (unsigned long *)((uintptr_t)p3 + 512);
p4 = (unsigned long *)((uintptr_t)p4 + 512);
}
}
DO_XOR_BLOCKS(avx_inner, xor_avx_2, xor_avx_3, xor_avx_4, xor_avx_5);
static void xor_gen_avx(void *dest, void **srcs, unsigned int src_cnt,
unsigned int bytes)
{
kernel_fpu_begin();
xor_gen_avx_inner(dest, srcs, src_cnt, bytes);
kernel_fpu_end();
}
struct xor_block_template xor_block_avx = {
.name = "avx",
.xor_gen = xor_gen_avx,
};