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1 /*
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2 * simple math operations
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3 * Copyright (c) 2001, 2002 Fabrice Bellard
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4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
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5 *
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6 * This file is part of FFmpeg.
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7 *
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8 * FFmpeg is free software; you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public
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10 * License as published by the Free Software Foundation; either
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11 * version 2.1 of the License, or (at your option) any later version.
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12 *
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13 * FFmpeg is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with FFmpeg; if not, write to the Free Software
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20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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21 */
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22
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23 #ifndef AVCODEC_PPC_MATHOPS_H
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24 #define AVCODEC_PPC_MATHOPS_H
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25
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26 #include <stdint.h>
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27 #include "config.h"
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28 #include "libavutil/common.h"
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29
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30 #if HAVE_PPC4XX
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31 /* signed 16x16 -> 32 multiply add accumulate */
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32 #define MAC16(rt, ra, rb) \
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33 __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
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34
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35 /* signed 16x16 -> 32 multiply */
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36 #define MUL16(ra, rb) \
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37 ({ int __rt; \
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38 __asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
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39 __rt; })
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40 #endif
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41
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42 #define MULH MULH
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43 static inline av_const int MULH(int a, int b){
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44 int r;
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45 __asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
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46 return r;
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47 }
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48
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49 #if !ARCH_PPC64
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50 static inline av_const int64_t MAC64(int64_t d, int a, int b)
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51 {
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52 union { uint64_t x; unsigned hl[2]; } x = { d };
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53 int h, l;
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54 __asm__ ("mullw %3, %4, %5 \n\t"
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55 "mulhw %2, %4, %5 \n\t"
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56 "addc %1, %1, %3 \n\t"
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57 "adde %0, %0, %2 \n\t"
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58 : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
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59 : "r"(a), "r"(b));
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60 return x.x;
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61 }
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62 #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
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63
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64 static inline av_const int64_t MLS64(int64_t d, int a, int b)
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65 {
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66 union { uint64_t x; unsigned hl[2]; } x = { d };
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67 int h, l;
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68 __asm__ ("mullw %3, %4, %5 \n\t"
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69 "mulhw %2, %4, %5 \n\t"
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70 "subfc %1, %3, %1 \n\t"
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71 "subfe %0, %2, %0 \n\t"
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72 : "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
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73 : "r"(a), "r"(b));
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74 return x.x;
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75 }
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76 #define MLS64(d, a, b) ((d) = MLS64(d, a, b))
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77 #endif
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78
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79 #endif /* AVCODEC_PPC_MATHOPS_H */
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