cc9f8349cb
This is a NEON acceleration method that can improve performance by approximately 20%. I got the following data from the centos 7.5 on Huawei's HISI1616 chip: [ 93.837726] xor: measuring software checksum speed [ 93.874039] 8regs : 7123.200 MB/sec [ 93.914038] 32regs : 7180.300 MB/sec [ 93.954043] arm64_neon: 9856.000 MB/sec [ 93.954047] xor: using function: arm64_neon (9856.000 MB/sec) I believe this code can bring some optimization for all arm64 platform. thanks for Ard Biesheuvel's suggestions. Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
185 lines
4.9 KiB
C
185 lines
4.9 KiB
C
/*
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* arch/arm64/lib/xor-neon.c
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*
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* Authors: Jackie Liu <liuyun01@kylinos.cn>
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* Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/raid/xor.h>
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#include <linux/module.h>
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#include <asm/neon-intrinsics.h>
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void xor_arm64_neon_2(unsigned long bytes, unsigned long *p1,
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unsigned long *p2)
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{
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uint64_t *dp1 = (uint64_t *)p1;
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uint64_t *dp2 = (uint64_t *)p2;
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register uint64x2_t v0, v1, v2, v3;
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long lines = bytes / (sizeof(uint64x2_t) * 4);
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do {
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/* p1 ^= p2 */
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v0 = veorq_u64(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0));
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v1 = veorq_u64(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2));
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v2 = veorq_u64(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4));
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v3 = veorq_u64(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6));
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/* store */
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vst1q_u64(dp1 + 0, v0);
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vst1q_u64(dp1 + 2, v1);
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vst1q_u64(dp1 + 4, v2);
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vst1q_u64(dp1 + 6, v3);
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dp1 += 8;
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dp2 += 8;
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} while (--lines > 0);
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}
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void xor_arm64_neon_3(unsigned long bytes, unsigned long *p1,
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unsigned long *p2, unsigned long *p3)
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{
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uint64_t *dp1 = (uint64_t *)p1;
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uint64_t *dp2 = (uint64_t *)p2;
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uint64_t *dp3 = (uint64_t *)p3;
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register uint64x2_t v0, v1, v2, v3;
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long lines = bytes / (sizeof(uint64x2_t) * 4);
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do {
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/* p1 ^= p2 */
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v0 = veorq_u64(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0));
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v1 = veorq_u64(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2));
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v2 = veorq_u64(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4));
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v3 = veorq_u64(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6));
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/* p1 ^= p3 */
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v0 = veorq_u64(v0, vld1q_u64(dp3 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp3 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp3 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp3 + 6));
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/* store */
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vst1q_u64(dp1 + 0, v0);
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vst1q_u64(dp1 + 2, v1);
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vst1q_u64(dp1 + 4, v2);
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vst1q_u64(dp1 + 6, v3);
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dp1 += 8;
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dp2 += 8;
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dp3 += 8;
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} while (--lines > 0);
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}
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void xor_arm64_neon_4(unsigned long bytes, unsigned long *p1,
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unsigned long *p2, unsigned long *p3, unsigned long *p4)
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{
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uint64_t *dp1 = (uint64_t *)p1;
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uint64_t *dp2 = (uint64_t *)p2;
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uint64_t *dp3 = (uint64_t *)p3;
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uint64_t *dp4 = (uint64_t *)p4;
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register uint64x2_t v0, v1, v2, v3;
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long lines = bytes / (sizeof(uint64x2_t) * 4);
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do {
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/* p1 ^= p2 */
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v0 = veorq_u64(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0));
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v1 = veorq_u64(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2));
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v2 = veorq_u64(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4));
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v3 = veorq_u64(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6));
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/* p1 ^= p3 */
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v0 = veorq_u64(v0, vld1q_u64(dp3 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp3 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp3 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp3 + 6));
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/* p1 ^= p4 */
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v0 = veorq_u64(v0, vld1q_u64(dp4 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp4 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp4 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp4 + 6));
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/* store */
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vst1q_u64(dp1 + 0, v0);
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vst1q_u64(dp1 + 2, v1);
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vst1q_u64(dp1 + 4, v2);
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vst1q_u64(dp1 + 6, v3);
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dp1 += 8;
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dp2 += 8;
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dp3 += 8;
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dp4 += 8;
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} while (--lines > 0);
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}
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void xor_arm64_neon_5(unsigned long bytes, unsigned long *p1,
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unsigned long *p2, unsigned long *p3,
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unsigned long *p4, unsigned long *p5)
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{
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uint64_t *dp1 = (uint64_t *)p1;
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uint64_t *dp2 = (uint64_t *)p2;
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uint64_t *dp3 = (uint64_t *)p3;
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uint64_t *dp4 = (uint64_t *)p4;
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uint64_t *dp5 = (uint64_t *)p5;
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register uint64x2_t v0, v1, v2, v3;
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long lines = bytes / (sizeof(uint64x2_t) * 4);
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do {
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/* p1 ^= p2 */
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v0 = veorq_u64(vld1q_u64(dp1 + 0), vld1q_u64(dp2 + 0));
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v1 = veorq_u64(vld1q_u64(dp1 + 2), vld1q_u64(dp2 + 2));
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v2 = veorq_u64(vld1q_u64(dp1 + 4), vld1q_u64(dp2 + 4));
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v3 = veorq_u64(vld1q_u64(dp1 + 6), vld1q_u64(dp2 + 6));
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/* p1 ^= p3 */
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v0 = veorq_u64(v0, vld1q_u64(dp3 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp3 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp3 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp3 + 6));
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/* p1 ^= p4 */
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v0 = veorq_u64(v0, vld1q_u64(dp4 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp4 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp4 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp4 + 6));
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/* p1 ^= p5 */
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v0 = veorq_u64(v0, vld1q_u64(dp5 + 0));
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v1 = veorq_u64(v1, vld1q_u64(dp5 + 2));
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v2 = veorq_u64(v2, vld1q_u64(dp5 + 4));
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v3 = veorq_u64(v3, vld1q_u64(dp5 + 6));
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/* store */
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vst1q_u64(dp1 + 0, v0);
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vst1q_u64(dp1 + 2, v1);
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vst1q_u64(dp1 + 4, v2);
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vst1q_u64(dp1 + 6, v3);
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dp1 += 8;
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dp2 += 8;
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dp3 += 8;
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dp4 += 8;
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dp5 += 8;
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} while (--lines > 0);
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}
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struct xor_block_template const xor_block_inner_neon = {
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.name = "__inner_neon__",
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.do_2 = xor_arm64_neon_2,
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.do_3 = xor_arm64_neon_3,
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.do_4 = xor_arm64_neon_4,
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.do_5 = xor_arm64_neon_5,
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};
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EXPORT_SYMBOL(xor_block_inner_neon);
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MODULE_AUTHOR("Jackie Liu <liuyun01@kylinos.cn>");
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MODULE_DESCRIPTION("ARMv8 XOR Extensions");
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MODULE_LICENSE("GPL");
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