/* * 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);