arch/arm/lib/xor-neon.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/lib/xor-neon.c
   4  *
   5  * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
   6  */
   7
   8 #include <linux/raid/xor.h>
   9 #include <linux/module.h>
  10
  11 MODULE_DESCRIPTION("NEON accelerated XOR implementation");
  12 MODULE_LICENSE("GPL");
  13
  14 #ifndef __ARM_NEON__
  15 #error You should compile this file with '-march=armv7-a -mfloat-abi=softfp -mfpu=neon'
  16 #endif
  17
  18 /*
  19  * Pull in the reference implementations while instructing GCC (through
  20  * -ftree-vectorize) to attempt to exploit implicit parallelism and emit
  21  * NEON instructions. Clang does this by default at O2 so no pragma is
  22  * needed.
  23  */
  24 #ifdef CONFIG_CC_IS_GCC
  25 #pragma GCC optimize "tree-vectorize"
  26 #endif
  27
  28 #pragma GCC diagnostic ignored "-Wunused-variable"
  29 #include <asm-generic/xor.h>
  30
  31 struct xor_block_template const xor_block_neon_inner = {
  32         .name   = "__inner_neon__",
  33         .do_2   = xor_8regs_2,
  34         .do_3   = xor_8regs_3,
  35         .do_4   = xor_8regs_4,
  36         .do_5   = xor_8regs_5,
  37 };
  38 EXPORT_SYMBOL(xor_block_neon_inner);