185 lines
4.4 KiB
C
185 lines
4.4 KiB
C
#ifndef _ASM_X86_XOR_AVX_H
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#define _ASM_X86_XOR_AVX_H
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/*
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* Optimized RAID-5 checksumming functions for AVX
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*
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* Copyright (C) 2012 Intel Corporation
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* Author: Jim Kukunas <james.t.kukunas@linux.intel.com>
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*
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* Based on Ingo Molnar and Zach Brown's respective MMX and SSE routines
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2
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* of the License.
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*/
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#ifdef CONFIG_AS_AVX
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#include <linux/compiler.h>
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#include <asm/i387.h>
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#define BLOCK4(i) \
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BLOCK(32 * i, 0) \
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BLOCK(32 * (i + 1), 1) \
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BLOCK(32 * (i + 2), 2) \
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BLOCK(32 * (i + 3), 3)
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#define BLOCK16() \
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BLOCK4(0) \
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BLOCK4(4) \
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BLOCK4(8) \
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BLOCK4(12)
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static void xor_avx_2(unsigned long bytes, unsigned long *p0, unsigned long *p1)
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{
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unsigned long lines = bytes >> 9;
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kernel_fpu_begin();
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while (lines--) {
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#undef BLOCK
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#define BLOCK(i, reg) \
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do { \
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asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p1[i / sizeof(*p1)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p0[i / sizeof(*p0)])); \
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asm volatile("vmovdqa %%ymm" #reg ", %0" : \
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"=m" (p0[i / sizeof(*p0)])); \
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} while (0);
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BLOCK16()
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p0 = (unsigned long *)((uintptr_t)p0 + 512);
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p1 = (unsigned long *)((uintptr_t)p1 + 512);
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}
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kernel_fpu_end();
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}
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static void xor_avx_3(unsigned long bytes, unsigned long *p0, unsigned long *p1,
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unsigned long *p2)
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{
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unsigned long lines = bytes >> 9;
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kernel_fpu_begin();
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while (lines--) {
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#undef BLOCK
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#define BLOCK(i, reg) \
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do { \
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asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p2[i / sizeof(*p2)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p1[i / sizeof(*p1)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p0[i / sizeof(*p0)])); \
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asm volatile("vmovdqa %%ymm" #reg ", %0" : \
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"=m" (p0[i / sizeof(*p0)])); \
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} while (0);
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BLOCK16()
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p0 = (unsigned long *)((uintptr_t)p0 + 512);
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p1 = (unsigned long *)((uintptr_t)p1 + 512);
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p2 = (unsigned long *)((uintptr_t)p2 + 512);
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}
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kernel_fpu_end();
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}
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static void xor_avx_4(unsigned long bytes, unsigned long *p0, unsigned long *p1,
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unsigned long *p2, unsigned long *p3)
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{
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unsigned long lines = bytes >> 9;
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kernel_fpu_begin();
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while (lines--) {
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#undef BLOCK
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#define BLOCK(i, reg) \
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do { \
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asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p3[i / sizeof(*p3)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p2[i / sizeof(*p2)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p1[i / sizeof(*p1)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p0[i / sizeof(*p0)])); \
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asm volatile("vmovdqa %%ymm" #reg ", %0" : \
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"=m" (p0[i / sizeof(*p0)])); \
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} while (0);
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BLOCK16();
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p0 = (unsigned long *)((uintptr_t)p0 + 512);
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p1 = (unsigned long *)((uintptr_t)p1 + 512);
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p2 = (unsigned long *)((uintptr_t)p2 + 512);
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p3 = (unsigned long *)((uintptr_t)p3 + 512);
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}
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kernel_fpu_end();
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}
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static void xor_avx_5(unsigned long bytes, unsigned long *p0, unsigned long *p1,
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unsigned long *p2, unsigned long *p3, unsigned long *p4)
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{
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unsigned long lines = bytes >> 9;
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kernel_fpu_begin();
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while (lines--) {
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#undef BLOCK
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#define BLOCK(i, reg) \
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do { \
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asm volatile("vmovdqa %0, %%ymm" #reg : : "m" (p4[i / sizeof(*p4)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p3[i / sizeof(*p3)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p2[i / sizeof(*p2)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p1[i / sizeof(*p1)])); \
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asm volatile("vxorps %0, %%ymm" #reg ", %%ymm" #reg : : \
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"m" (p0[i / sizeof(*p0)])); \
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asm volatile("vmovdqa %%ymm" #reg ", %0" : \
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"=m" (p0[i / sizeof(*p0)])); \
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} while (0);
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BLOCK16()
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p0 = (unsigned long *)((uintptr_t)p0 + 512);
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p1 = (unsigned long *)((uintptr_t)p1 + 512);
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p2 = (unsigned long *)((uintptr_t)p2 + 512);
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p3 = (unsigned long *)((uintptr_t)p3 + 512);
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p4 = (unsigned long *)((uintptr_t)p4 + 512);
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}
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kernel_fpu_end();
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}
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static struct xor_block_template xor_block_avx = {
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.name = "avx",
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.do_2 = xor_avx_2,
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.do_3 = xor_avx_3,
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.do_4 = xor_avx_4,
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.do_5 = xor_avx_5,
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};
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#define AVX_XOR_SPEED \
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do { \
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if (cpu_has_avx) \
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xor_speed(&xor_block_avx); \
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} while (0)
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#define AVX_SELECT(FASTEST) \
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(cpu_has_avx ? &xor_block_avx : FASTEST)
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#else
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#define AVX_XOR_SPEED {}
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#define AVX_SELECT(FASTEST) (FASTEST)
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#endif
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#endif
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