diff options
Diffstat (limited to 'arm/arm_init.c')
| -rw-r--r-- | arm/arm_init.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/arm/arm_init.c b/arm/arm_init.c index 02df812e7..84d05556f 100644 --- a/arm/arm_init.c +++ b/arm/arm_init.c @@ -1,17 +1,16 @@ /* arm_init.c - NEON optimised filter functions * + * Copyright (c) 2018-2022 Cosmin Truta * Copyright (c) 2014,2016 Glenn Randers-Pehrson * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.6.22 [May 26, 2016] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h */ -/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are - * called. - */ + +/* This module requires POSIX 1003.1 functions. */ #define _POSIX_SOURCE 1 #include "../pngpriv.h" @@ -32,21 +31,26 @@ * has partial support is contrib/arm-neon/linux.c - a generic Linux * implementation which reads /proc/cpufino. */ +#include <signal.h> /* for sig_atomic_t */ + #ifndef PNG_ARM_NEON_FILE -# ifdef __linux__ -# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c" +# if defined(__aarch64__) || defined(_M_ARM64) + /* ARM Neon is expected to be unconditionally available on ARM64. */ +# error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on ARM64" +# elif defined(__ARM_NEON__) || defined(__ARM_NEON) + /* ARM Neon is expected to be available on the target CPU architecture. */ +# error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on this CPU arch" +# elif defined(__linux__) +# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c" +# else +# error "No support for run-time ARM Neon checking; use compile-time options" # endif #endif -#ifdef PNG_ARM_NEON_FILE - -#include <signal.h> /* for sig_atomic_t */ static int png_have_neon(png_structp png_ptr); -#include PNG_ARM_NEON_FILE - -#else /* PNG_ARM_NEON_FILE */ -# error "PNG_ARM_NEON_FILE undefined: no support for run-time ARM NEON checks" -#endif /* PNG_ARM_NEON_FILE */ +#ifdef PNG_ARM_NEON_FILE +# include PNG_ARM_NEON_FILE +#endif #endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ #ifndef PNG_ALIGNED_MEMORY_SUPPORTED |