/* * simple math operations * Copyright (c) 2001, 2002 Fabrice Bellard * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_PPC_MATHOPS_H #define AVCODEC_PPC_MATHOPS_H #include <stdint.h> #include "config.h" #include "libavutil/common.h" #if HAVE_PPC4XX /* signed 16x16 -> 32 multiply add accumulate */ #define MAC16(rt, ra, rb) \ __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb)); /* signed 16x16 -> 32 multiply */ #define MUL16(ra, rb) \ ({ int __rt; \ __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \ __rt; }) #endif #define MULH MULH static inline av_const int MULH(int a, int b){ int r; __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b)); return r; } #if !ARCH_PPC64 static inline av_const int64_t MAC64(int64_t d, int a, int b) { union { uint64_t x; unsigned hl[2]; } x = { d }; int h, l; __asm__ ("mullw %3, %4, %5 \n\t" "mulhw %2, %4, %5 \n\t" "addc %1, %1, %3 \n\t" "adde %0, %0, %2 \n\t" : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l) : "r"(a), "r"(b)); return x.x; } #define MAC64(d, a, b) ((d) = MAC64(d, a, b)) static inline av_const int64_t MLS64(int64_t d, int a, int b) { union { uint64_t x; unsigned hl[2]; } x = { d }; int h, l; __asm__ ("mullw %3, %4, %5 \n\t" "mulhw %2, %4, %5 \n\t" "subfc %1, %3, %1 \n\t" "subfe %0, %2, %0 \n\t" : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l) : "r"(a), "r"(b)); return x.x; } #define MLS64(d, a, b) ((d) = MLS64(d, a, b)) #endif #endif /* AVCODEC_PPC_MATHOPS_H */