Libav 0.7.1
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00001 /* 00002 * Simple math operations 00003 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVCODEC_AVR32_MATHOPS_H 00023 #define AVCODEC_AVR32_MATHOPS_H 00024 00025 #include <stdint.h> 00026 #include "config.h" 00027 #include "libavutil/common.h" 00028 00029 #if HAVE_INLINE_ASM 00030 00031 #define MULL MULL 00032 static inline av_const int MULL(int a, int b, unsigned shift) 00033 { 00034 union { int64_t x; int hl[2]; } x; 00035 __asm__ ("muls.d %0, %1, %2 \n\t" 00036 "lsr %0, %3 \n\t" 00037 "or %0, %0, %m0<<%4 \n\t" 00038 : "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift)); 00039 return x.hl[1]; 00040 } 00041 00042 #define MULH MULH 00043 static inline av_const int MULH(int a, int b) 00044 { 00045 union { int64_t x; int hl[2]; } x; 00046 __asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b)); 00047 return x.hl[0]; 00048 } 00049 00050 #define MUL64 MUL64 00051 static inline av_const int64_t MUL64(int a, int b) 00052 { 00053 int64_t x; 00054 __asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b)); 00055 return x; 00056 } 00057 00058 static inline av_const int64_t MAC64(int64_t d, int a, int b) 00059 { 00060 __asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b)); 00061 return d; 00062 } 00063 #define MAC64(d, a, b) ((d) = MAC64(d, a, b)) 00064 #define MLS64(d, a, b) MAC64(d, -(a), b) 00065 00066 static inline av_const int MAC16(int d, int a, int b) 00067 { 00068 __asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b)); 00069 return d; 00070 } 00071 #define MAC16(d, a, b) ((d) = MAC16(d, a, b)) 00072 #define MLS16(d, a, b) MAC16(d, -(a), b) 00073 00074 #define MUL16 MUL16 00075 static inline av_const int MUL16(int a, int b) 00076 { 00077 int d; 00078 __asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b)); 00079 return d; 00080 } 00081 00082 #define mid_pred mid_pred 00083 static inline av_const int mid_pred(int a, int b, int c) 00084 { 00085 int m; 00086 __asm__ ("mov %0, %2 \n\t" 00087 "cp.w %1, %2 \n\t" 00088 "movgt %0, %1 \n\t" 00089 "movgt %1, %2 \n\t" 00090 "cp.w %1, %3 \n\t" 00091 "movle %1, %3 \n\t" 00092 "cp.w %0, %1 \n\t" 00093 "movgt %0, %1 \n\t" 00094 : "=&r"(m), "+r"(a) 00095 : "r"(b), "r"(c)); 00096 return m; 00097 } 00098 00099 #endif /* HAVE_INLINE_ASM */ 00100 00101 #endif /* AVCODEC_AVR32_MATHOPS_H */