mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
4819aeebf4
The vendor has long since switched to Arm, with the last product reaching their official end-of-life over 11 years ago. Linux support for the ISA was dropped 7 years ago. More importantly, this architecture was never supported by upstream GCC, and the vendor fork is stuck at version 4.2, which FFmpeg no longer supports (as per C11 requirement). Presumably, this is still the case given the lack of vendor support. Indeed all of the code being removed here consisted of inline assembler scalar optimisations. A sane C compiler should be able to perform those automatically nowadays (with the sole exception of fast CLZ detection), but this is moot as this architecture is evidently dead.
254 lines
5.9 KiB
C
254 lines
5.9 KiB
C
/*
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* simple math operations
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* Copyright (c) 2001, 2002 Fabrice Bellard
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MATHOPS_H
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#define AVCODEC_MATHOPS_H
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#include <stdint.h>
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#include "libavutil/attributes_internal.h"
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#include "libavutil/common.h"
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#include "config.h"
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#define MAX_NEG_CROP 1024
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extern const uint32_t ff_inverse[257];
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extern const uint8_t ff_log2_run[41];
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extern const uint8_t ff_sqrt_tab[256];
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extern const uint8_t attribute_visibility_hidden ff_crop_tab[256 + 2 * MAX_NEG_CROP];
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extern const uint8_t ff_zigzag_direct[64];
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extern const uint8_t ff_zigzag_scan[16+1];
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#if ARCH_ARM
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# include "arm/mathops.h"
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#elif ARCH_MIPS
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# include "mips/mathops.h"
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#elif ARCH_PPC
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# include "ppc/mathops.h"
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#elif ARCH_X86
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# include "x86/mathops.h"
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#endif
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/* generic implementation */
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#ifndef MUL64
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# define MUL64(a,b) ((int64_t)(a) * (int64_t)(b))
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#endif
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#ifndef MULL
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# define MULL(a,b,s) (MUL64(a, b) >> (s))
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#endif
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#ifndef MULH
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static av_always_inline int MULH(int a, int b){
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return MUL64(a, b) >> 32;
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}
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#endif
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#ifndef UMULH
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static av_always_inline unsigned UMULH(unsigned a, unsigned b){
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return ((uint64_t)(a) * (uint64_t)(b))>>32;
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}
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#endif
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#ifndef MAC64
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# define MAC64(d, a, b) ((d) += MUL64(a, b))
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#endif
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#ifndef MLS64
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# define MLS64(d, a, b) ((d) -= MUL64(a, b))
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#endif
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/* signed 16x16 -> 32 multiply add accumulate */
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#ifndef MAC16
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# define MAC16(rt, ra, rb) rt += (ra) * (rb)
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#endif
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/* signed 16x16 -> 32 multiply */
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#ifndef MUL16
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# define MUL16(ra, rb) ((ra) * (rb))
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#endif
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#ifndef MLS16
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# define MLS16(rt, ra, rb) ((rt) -= (ra) * (rb))
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#endif
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/* median of 3 */
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#ifndef mid_pred
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#define mid_pred mid_pred
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static inline av_const int mid_pred(int a, int b, int c)
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{
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if(a>b){
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if(c>b){
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if(c>a) b=a;
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else b=c;
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}
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}else{
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if(b>c){
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if(c>a) b=c;
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else b=a;
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}
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}
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return b;
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}
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#endif
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#ifndef median4
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#define median4 median4
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static inline av_const int median4(int a, int b, int c, int d)
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{
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if (a < b) {
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if (c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
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else return (FFMIN(b, c) + FFMAX(a, d)) / 2;
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} else {
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if (c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
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else return (FFMIN(a, c) + FFMAX(b, d)) / 2;
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}
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}
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#endif
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#define FF_SIGNBIT(x) ((x) >> CHAR_BIT * sizeof(x) - 1)
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#ifndef sign_extend
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static inline av_const int sign_extend(int val, unsigned bits)
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{
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unsigned shift = 8 * sizeof(int) - bits;
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union { unsigned u; int s; } v = { (unsigned) val << shift };
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return v.s >> shift;
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}
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#endif
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#ifndef sign_extend64
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static inline av_const int64_t sign_extend64(int64_t val, unsigned bits)
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{
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unsigned shift = 8 * sizeof(int64_t) - bits;
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union { uint64_t u; int64_t s; } v = { (uint64_t) val << shift };
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return v.s >> shift;
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}
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#endif
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#ifndef zero_extend
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static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
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{
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return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
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}
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#endif
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#ifndef COPY3_IF_LT
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#define COPY3_IF_LT(x, y, a, b, c, d)\
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if ((y) < (x)) {\
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(x) = (y);\
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(a) = (b);\
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(c) = (d);\
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}
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#endif
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#ifndef MASK_ABS
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#define MASK_ABS(mask, level) do { \
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mask = level >> 31; \
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level = (level ^ mask) - mask; \
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} while (0)
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#endif
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#ifndef NEG_SSR32
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# define NEG_SSR32(a,s) ((( int32_t)(a))>>(32-(s)))
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#endif
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#ifndef NEG_USR32
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# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
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#endif
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#if HAVE_BIGENDIAN
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# ifndef PACK_2U8
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# define PACK_2U8(a,b) (((a) << 8) | (b))
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# endif
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# ifndef PACK_4U8
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# define PACK_4U8(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
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# endif
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# ifndef PACK_2U16
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# define PACK_2U16(a,b) (((a) << 16) | (b))
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# endif
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#else
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# ifndef PACK_2U8
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# define PACK_2U8(a,b) (((b) << 8) | (a))
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# endif
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# ifndef PACK_4U2
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# define PACK_4U8(a,b,c,d) (((d) << 24) | ((c) << 16) | ((b) << 8) | (a))
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# endif
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# ifndef PACK_2U16
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# define PACK_2U16(a,b) (((b) << 16) | (a))
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# endif
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#endif
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#ifndef PACK_2S8
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# define PACK_2S8(a,b) PACK_2U8((a)&255, (b)&255)
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#endif
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#ifndef PACK_4S8
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# define PACK_4S8(a,b,c,d) PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255)
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#endif
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#ifndef PACK_2S16
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# define PACK_2S16(a,b) PACK_2U16((a)&0xffff, (b)&0xffff)
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#endif
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#ifndef FASTDIV
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# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32))
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#endif /* FASTDIV */
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#ifndef ff_sqrt
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#define ff_sqrt ff_sqrt
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static inline av_const unsigned int ff_sqrt(unsigned int a)
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{
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unsigned int b;
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if (a < 255) return (ff_sqrt_tab[a + 1] - 1) >> 4;
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else if (a < (1 << 12)) b = ff_sqrt_tab[a >> 4] >> 2;
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#if !CONFIG_SMALL
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else if (a < (1 << 14)) b = ff_sqrt_tab[a >> 6] >> 1;
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else if (a < (1 << 16)) b = ff_sqrt_tab[a >> 8] ;
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#endif
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else {
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int s = av_log2_16bit(a >> 16) >> 1;
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unsigned int c = a >> (s + 2);
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b = ff_sqrt_tab[c >> (s + 8)];
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b = FASTDIV(c,b) + (b << s);
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}
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return b - (a < b * b);
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}
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#endif
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static inline av_const float ff_sqrf(float a)
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{
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return a*a;
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}
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static inline int8_t ff_u8_to_s8(uint8_t a)
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{
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union {
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uint8_t u8;
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int8_t s8;
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} b;
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b.u8 = a;
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return b.s8;
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}
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#endif /* AVCODEC_MATHOPS_H */
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