1/* 2 * check NEON registers for clobbering 3 * Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com> 4 * Copyright (c) 2013 Martin Storsjo 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <inttypes.h> 24#include <stdint.h> 25#include <stdlib.h> 26#include <stdarg.h> 27#include <string.h> 28 29#include "libavutil/bswap.h" 30 31#define storeneonregs(mem) \ 32 __asm__ volatile( \ 33 "vstm %0, {d8-d15}\n\t" \ 34 :: "r"(mem) : "memory") 35 36#define testneonclobbers(func, ctx, ...) \ 37 uint64_t neon[2][8]; \ 38 int ret; \ 39 storeneonregs(neon[0]); \ 40 ret = __real_ ## func(ctx, __VA_ARGS__); \ 41 storeneonregs(neon[1]); \ 42 if (memcmp(neon[0], neon[1], sizeof(neon[0]))) { \ 43 int i; \ 44 av_log(ctx, AV_LOG_ERROR, \ 45 "NEON REGS CLOBBERED IN %s!\n", #func); \ 46 for (i = 0; i < 8; i ++) \ 47 if (neon[0][i] != neon[1][i]) { \ 48 av_log(ctx, AV_LOG_ERROR, \ 49 "d%-2d = %016"PRIx64"\n", \ 50 8 + i, av_bswap64(neon[0][i])); \ 51 av_log(ctx, AV_LOG_ERROR, \ 52 " -> %016"PRIx64"\n", \ 53 av_bswap64(neon[1][i])); \ 54 } \ 55 abort(); \ 56 } \ 57 return ret 58 59#define wrap(func) \ 60int __real_ ## func; \ 61int __wrap_ ## func; \ 62int __wrap_ ## func 63