diff options
Diffstat (limited to 'src/3rdparty/libjpeg/src/jchuff.c')
| -rw-r--r-- | src/3rdparty/libjpeg/src/jchuff.c | 38 |
1 files changed, 2 insertions, 36 deletions
diff --git a/src/3rdparty/libjpeg/src/jchuff.c b/src/3rdparty/libjpeg/src/jchuff.c index 3fede05f80..488c9b5c3a 100644 --- a/src/3rdparty/libjpeg/src/jchuff.c +++ b/src/3rdparty/libjpeg/src/jchuff.c @@ -6,7 +6,7 @@ * Lossless JPEG Modifications: * Copyright (C) 1999, Ken Murchison. * libjpeg-turbo Modifications: - * Copyright (C) 2009-2011, 2014-2016, 2018-2023, D. R. Commander. + * Copyright (C) 2009-2011, 2014-2016, 2018-2024, D. R. Commander. * Copyright (C) 2015, Matthieu Darbois. * Copyright (C) 2018, Matthias Räncker. * Copyright (C) 2020, Arm Limited. @@ -35,41 +35,7 @@ #include "jchuff.h" /* Declarations shared with jc*huff.c */ #endif #include <limits.h> - -/* - * NOTE: If USE_CLZ_INTRINSIC is defined, then clz/bsr instructions will be - * used for bit counting rather than the lookup table. This will reduce the - * memory footprint by 64k, which is important for some mobile applications - * that create many isolated instances of libjpeg-turbo (web browsers, for - * instance.) This may improve performance on some mobile platforms as well. - * This feature is enabled by default only on Arm processors, because some x86 - * chips have a slow implementation of bsr, and the use of clz/bsr cannot be - * shown to have a significant performance impact even on the x86 chips that - * have a fast implementation of it. When building for Armv6, you can - * explicitly disable the use of clz/bsr by adding -mthumb to the compiler - * flags (this defines __thumb__). - */ - -/* NOTE: Both GCC and Clang define __GNUC__ */ -#if (defined(__GNUC__) && (defined(__arm__) || defined(__aarch64__))) || \ - defined(_M_ARM) || defined(_M_ARM64) -#if !defined(__thumb__) || defined(__thumb2__) -#define USE_CLZ_INTRINSIC -#endif -#endif - -#ifdef USE_CLZ_INTRINSIC -#if defined(_MSC_VER) && !defined(__clang__) -#define JPEG_NBITS_NONZERO(x) (32 - _CountLeadingZeros(x)) -#else -#define JPEG_NBITS_NONZERO(x) (32 - __builtin_clz(x)) -#endif -#define JPEG_NBITS(x) (x ? JPEG_NBITS_NONZERO(x) : 0) -#else -#include "jpeg_nbits_table.h" -#define JPEG_NBITS(x) (jpeg_nbits_table[x]) -#define JPEG_NBITS_NONZERO(x) JPEG_NBITS(x) -#endif +#include "jpeg_nbits.h" /* Expanded entropy encoder object for Huffman encoding. |