diff options
Diffstat (limited to 'png/pngpriv.h')
| -rw-r--r-- | png/pngpriv.h | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/png/pngpriv.h b/png/pngpriv.h index 9bfdb7134..b59084e7e 100644 --- a/png/pngpriv.h +++ b/png/pngpriv.h @@ -140,47 +140,6 @@ * callbacks to do this. */ # define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon - - /* By default the 'intrinsics' code in arm/filter_neon_intrinsics.c is used - * if possible - if __ARM_NEON__ is set and the compiler version is not known - * to be broken. This is controlled by PNG_ARM_NEON_IMPLEMENTATION which can - * be: - * - * 1 The intrinsics code (the default with __ARM_NEON__) - * 2 The hand coded assembler (the default without __ARM_NEON__) - * - * It is possible to set PNG_ARM_NEON_IMPLEMENTATION in CPPFLAGS, however - * this is *NOT* supported and may cease to work even after a minor revision - * to libpng. It *is* valid to do this for testing purposes, e.g. speed - * testing or a new compiler, but the results should be communicated to the - * libpng implementation list for incorporation in the next minor release. - */ -# ifndef PNG_ARM_NEON_IMPLEMENTATION -# if defined(__ARM_NEON__) || defined(__ARM_NEON) -# if defined(__clang__) - /* At present it is unknown by the libpng developers which versions - * of clang support the intrinsics, however some or perhaps all - * versions do not work with the assembler so this may be - * irrelevant, so just use the default (do nothing here.) - */ -# elif defined(__GNUC__) - /* GCC 4.5.4 NEON support is known to be broken. 4.6.3 is known to - * work, so if this *is* GCC, or G++, look for a version >4.5 - */ -# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6) -# define PNG_ARM_NEON_IMPLEMENTATION 2 -# endif /* no GNUC support */ -# endif /* __GNUC__ */ -# else /* !defined __ARM_NEON__ */ - /* The 'intrinsics' code simply won't compile without this -mfpu=neon: - */ -# if !defined(__aarch64__) && !defined(_M_ARM64) - /* The assembler code currently does not work on ARM64 */ -# define PNG_ARM_NEON_IMPLEMENTATION 2 -# endif /* __aarch64__ */ -# endif /* __ARM_NEON__ */ -# endif /* !PNG_ARM_NEON_IMPLEMENTATION */ - # ifndef PNG_ARM_NEON_IMPLEMENTATION /* Use the intrinsics code by default. */ # define PNG_ARM_NEON_IMPLEMENTATION 1 |