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/*
* linux/arch/arm/lib/xor-neon.c
*
* Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/raid/xor.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");
#ifndef __ARM_NEON__
#error You should compile this file with '-march=armv7-a -mfloat-abi=softfp -mfpu=neon'
#endif
/*
* Pull in the reference implementations while instructing GCC (through
* -ftree-vectorize) to attempt to exploit implicit parallelism and emit
* NEON instructions.
*/
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#pragma GCC optimize "tree-vectorize"
#else
/*
* While older versions of GCC do not generate incorrect code, they fail to
* recognize the parallel nature of these functions, and emit plain ARM code,
* which is known to be slower than the optimized ARM code in asm-arm/xor.h.
*/
#warning This code requires at least version 4.6 of GCC
#endif
#pragma GCC diagnostic ignored "-Wunused-variable"
#include <asm-generic/xor.h>
struct xor_block_template const xor_block_neon_inner = {
.name = "__inner_neon__",
.do_2 = xor_8regs_2,
.do_3 = xor_8regs_3,
.do_4 = xor_8regs_4,
.do_5 = xor_8regs_5,
};
EXPORT_SYMBOL(xor_block_neon_inner);
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