projects / people / arne_f / kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 01956597 AB |
1 | /* |
| 2 | * linux/arch/arm/lib/xor-neon.c | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/raid/xor.h> | |
| 9319206d AB |
12 | #include <linux/module.h> |
| 13 | ||
| 14 | MODULE_LICENSE("GPL"); | |
| 01956597 AB |
15 | |
| 16 | #ifndef __ARM_NEON__ | |
| 17 | #error You should compile this file with '-mfloat-abi=softfp -mfpu=neon' | |
| 18 | #endif | |
| 19 | ||
| 20 | /* | |
| 21 | * Pull in the reference implementations while instructing GCC (through | |
| 22 | * -ftree-vectorize) to attempt to exploit implicit parallelism and emit | |
| 23 | * NEON instructions. | |
| 24 | */ | |
| 25 | #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) | |
| 26 | #pragma GCC optimize "tree-vectorize" | |
| 27 | #else | |
| 28 | /* | |
| 29 | * While older versions of GCC do not generate incorrect code, they fail to | |
| 30 | * recognize the parallel nature of these functions, and emit plain ARM code, | |
| 31 | * which is known to be slower than the optimized ARM code in asm-arm/xor.h. | |
| 32 | */ | |
| 33 | #warning This code requires at least version 4.6 of GCC | |
| 34 | #endif | |
| 35 | ||
| 36 | #pragma GCC diagnostic ignored "-Wunused-variable" | |
| 37 | #include <asm-generic/xor.h> | |
| 38 | ||
| 39 | struct xor_block_template const xor_block_neon_inner = { | |
| 40 | .name = "__inner_neon__", | |
| 41 | .do_2 = xor_8regs_2, | |
| 42 | .do_3 = xor_8regs_3, | |
| 43 | .do_4 = xor_8regs_4, | |
| 44 | .do_5 = xor_8regs_5, | |
| 45 | }; | |
| 9319206d | 46 | EXPORT_SYMBOL(xor_block_neon_inner); |