| /* |
| * simple math operations |
| * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVCODEC_ARM_MATHOPS_H |
| #define AVCODEC_ARM_MATHOPS_H |
| |
| #include <stdint.h> |
| #include "config.h" |
| #include "libavutil/common.h" |
| |
| #if HAVE_INLINE_ASM |
| |
| #if HAVE_ARMV6 |
| #define MULH MULH |
| static inline av_const int MULH(int a, int b) |
| { |
| int r; |
| __asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); |
| return r; |
| } |
| #endif |
| |
| #define MLS64(d, a, b) MAC64(d, -(a), b) |
| |
| #if HAVE_ARMV5TE |
| |
| /* signed 16x16 -> 32 multiply add accumulate */ |
| # define MAC16(rt, ra, rb) \ |
| __asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb)); |
| |
| /* signed 16x16 -> 32 multiply */ |
| # define MUL16 MUL16 |
| static inline av_const int MUL16(int ra, int rb) |
| { |
| int rt; |
| __asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb)); |
| return rt; |
| } |
| |
| #endif |
| |
| #define mid_pred mid_pred |
| static inline av_const int mid_pred(int a, int b, int c) |
| { |
| int m; |
| __asm__ ( |
| "mov %0, %2 \n\t" |
| "cmp %1, %2 \n\t" |
| "movgt %0, %1 \n\t" |
| "movgt %1, %2 \n\t" |
| "cmp %1, %3 \n\t" |
| "movle %1, %3 \n\t" |
| "cmp %0, %1 \n\t" |
| "movgt %0, %1 \n\t" |
| : "=&r"(m), "+r"(a) |
| : "r"(b), "r"(c) |
| : "cc"); |
| return m; |
| } |
| |
| #endif /* HAVE_INLINE_ASM */ |
| |
| #endif /* AVCODEC_ARM_MATHOPS_H */ |