odintrin.h (2550B)
1 /* 2 * Copyright (c) 2001-2016, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 /* clang-format off */ 13 14 #ifndef AOM_AOM_DSP_ODINTRIN_H_ 15 #define AOM_AOM_DSP_ODINTRIN_H_ 16 17 #include <stdlib.h> 18 #include <string.h> 19 20 #include "aom/aom_integer.h" 21 #include "aom_dsp/aom_dsp_common.h" 22 #include "aom_ports/bitops.h" 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 typedef int od_coeff; 29 30 #define OD_DIVU_DMAX (1024) 31 32 extern uint32_t OD_DIVU_SMALL_CONSTS[OD_DIVU_DMAX][2]; 33 34 /*Translate unsigned division by small divisors into multiplications.*/ 35 #define OD_DIVU_SMALL(_x, _d) \ 36 ((uint32_t)((OD_DIVU_SMALL_CONSTS[(_d)-1][0] * (uint64_t)(_x) + \ 37 OD_DIVU_SMALL_CONSTS[(_d)-1][1]) >> \ 38 32) >> \ 39 (OD_ILOG_NZ(_d) - 1)) 40 41 #define OD_DIVU(_x, _d) \ 42 (((_d) < OD_DIVU_DMAX) ? (OD_DIVU_SMALL((_x), (_d))) : ((_x) / (_d))) 43 44 #define OD_MINI AOMMIN 45 #define OD_MAXI AOMMAX 46 #define OD_CLAMPI(min, val, max) (OD_MAXI(min, OD_MINI(val, max))) 47 48 /*Integer logarithm (base 2) of a nonzero unsigned 32-bit integer. 49 OD_ILOG_NZ(x) = (int)floor(log2(x)) + 1.*/ 50 #define OD_ILOG_NZ(x) (1 + get_msb(x)) 51 52 /*Enable special features for gcc and compatible compilers.*/ 53 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) 54 #define OD_GNUC_PREREQ(maj, min, pat) \ 55 ((__GNUC__ << 16) + (__GNUC_MINOR__ << 8) + __GNUC_PATCHLEVEL__ >= \ 56 ((maj) << 16) + ((min) << 8) + pat) // NOLINT 57 #else 58 #define OD_GNUC_PREREQ(maj, min, pat) (0) 59 #endif 60 61 #if OD_GNUC_PREREQ(3, 4, 0) 62 #define OD_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) 63 #else 64 #define OD_WARN_UNUSED_RESULT 65 #endif 66 67 #if OD_GNUC_PREREQ(3, 4, 0) 68 #define OD_ARG_NONNULL(x) __attribute__((__nonnull__(x))) 69 #else 70 #define OD_ARG_NONNULL(x) 71 #endif 72 73 /*All of these macros should expect floats as arguments.*/ 74 # define OD_SIGNMASK(a) (-((a) < 0)) 75 # define OD_FLIPSIGNI(a, b) (((a) + OD_SIGNMASK(b)) ^ OD_SIGNMASK(b)) 76 77 #ifdef __cplusplus 78 } // extern "C" 79 #endif 80 81 #endif // AOM_AOM_DSP_ODINTRIN_H_