mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
75ded18a5e
Add LSX and LASX implementations of xor operations, operating on 64 bytes (one L1 cache line) at a time, for a balance between memory utilization and instruction mix. Huacai confirmed that all future LoongArch implementations by Loongson (that we care) will likely also feature 64-byte cache lines, and experiments show no throughput improvement with further unrolling. Performance numbers measured during system boot on a 3A5000 @ 2.5GHz: > 8regs : 12702 MB/sec > 8regs_prefetch : 10920 MB/sec > 32regs : 12686 MB/sec > 32regs_prefetch : 10918 MB/sec > lsx : 17589 MB/sec > lasx : 26116 MB/sec Acked-by: Song Liu <song@kernel.org> Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* LoongArch SIMD XOR operations
|
|
*
|
|
* Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/fpu.h>
|
|
#include <asm/xor_simd.h>
|
|
#include "xor_simd.h"
|
|
|
|
#define MAKE_XOR_GLUE_2(flavor) \
|
|
void xor_##flavor##_2(unsigned long bytes, unsigned long * __restrict p1, \
|
|
const unsigned long * __restrict p2) \
|
|
{ \
|
|
kernel_fpu_begin(); \
|
|
__xor_##flavor##_2(bytes, p1, p2); \
|
|
kernel_fpu_end(); \
|
|
} \
|
|
EXPORT_SYMBOL_GPL(xor_##flavor##_2)
|
|
|
|
#define MAKE_XOR_GLUE_3(flavor) \
|
|
void xor_##flavor##_3(unsigned long bytes, unsigned long * __restrict p1, \
|
|
const unsigned long * __restrict p2, \
|
|
const unsigned long * __restrict p3) \
|
|
{ \
|
|
kernel_fpu_begin(); \
|
|
__xor_##flavor##_3(bytes, p1, p2, p3); \
|
|
kernel_fpu_end(); \
|
|
} \
|
|
EXPORT_SYMBOL_GPL(xor_##flavor##_3)
|
|
|
|
#define MAKE_XOR_GLUE_4(flavor) \
|
|
void xor_##flavor##_4(unsigned long bytes, unsigned long * __restrict p1, \
|
|
const unsigned long * __restrict p2, \
|
|
const unsigned long * __restrict p3, \
|
|
const unsigned long * __restrict p4) \
|
|
{ \
|
|
kernel_fpu_begin(); \
|
|
__xor_##flavor##_4(bytes, p1, p2, p3, p4); \
|
|
kernel_fpu_end(); \
|
|
} \
|
|
EXPORT_SYMBOL_GPL(xor_##flavor##_4)
|
|
|
|
#define MAKE_XOR_GLUE_5(flavor) \
|
|
void xor_##flavor##_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) \
|
|
{ \
|
|
kernel_fpu_begin(); \
|
|
__xor_##flavor##_5(bytes, p1, p2, p3, p4, p5); \
|
|
kernel_fpu_end(); \
|
|
} \
|
|
EXPORT_SYMBOL_GPL(xor_##flavor##_5)
|
|
|
|
#define MAKE_XOR_GLUES(flavor) \
|
|
MAKE_XOR_GLUE_2(flavor); \
|
|
MAKE_XOR_GLUE_3(flavor); \
|
|
MAKE_XOR_GLUE_4(flavor); \
|
|
MAKE_XOR_GLUE_5(flavor)
|
|
|
|
#ifdef CONFIG_CPU_HAS_LSX
|
|
MAKE_XOR_GLUES(lsx);
|
|
#endif
|
|
|
|
#ifdef CONFIG_CPU_HAS_LASX
|
|
MAKE_XOR_GLUES(lasx);
|
|
#endif
|