Fix libpng link errors on android
This commit is contained in:
mrezai
232
drivers/png/arm/arm_init.c
Normal file
232
drivers/png/arm/arm_init.c
Normal file
@ -0,0 +1,232 @@
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/* arm_init.c - NEON optimised filter functions
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*
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* Copyright (c) 2013 Glenn Randers-Pehrson
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* Written by Mans Rullgard, 2011.
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* Last changed in libpng 1.6.8 [December 19, 2013]
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*/
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/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are
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* called.
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*/
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#define _POSIX_SOURCE 1
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#include "../pngpriv.h"
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#ifdef PNG_READ_SUPPORTED
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#if PNG_ARM_NEON_OPT > 0
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#ifdef PNG_ARM_NEON_CHECK_SUPPORTED /* Do run-time checks */
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#include <signal.h> /* for sig_atomic_t */
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#ifdef __ANDROID__
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/* Linux provides access to information about CPU capabilites via
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* /proc/self/auxv, however Android blocks this while still claiming to be
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* Linux. The Andoid NDK, however, provides appropriate support.
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*
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* Documentation: http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
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*/
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#include <cpu-features.h>
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static int
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png_have_neon(png_structp png_ptr)
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{
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/* This is a whole lot easier than the mess below, however it is probably
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* implemented as below, therefore it is better to cache the result (these
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* function calls may be slow!)
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*/
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PNG_UNUSED(png_ptr)
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return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM &&
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(android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;
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}
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#elif defined(__linux__)
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/* The generic __linux__ implementation requires reading /proc/self/auxv and
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* looking at each element for one that records NEON capabilities.
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*/
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#include <unistd.h> /* for POSIX 1003.1 */
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#include <errno.h> /* for EINTR */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <elf.h>
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#include <asm/hwcap.h>
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/* A read call may be interrupted, in which case it returns -1 and sets errno to
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* EINTR if nothing was done, otherwise (if something was done) a partial read
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* may result.
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*/
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static size_t
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safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes)
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{
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size_t ntotal = 0;
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char *buffer = png_voidcast(char*, buffer_in);
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while (nbytes > 0)
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{
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unsigned int nread;
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int iread;
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/* Passing nread > INT_MAX to read is implementation defined in POSIX
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* 1003.1, therefore despite the unsigned argument portable code must
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* limit the value to INT_MAX!
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*/
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if (nbytes > INT_MAX)
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nread = INT_MAX;
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else
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nread = (unsigned int)/*SAFE*/nbytes;
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iread = read(fd, buffer, nread);
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if (iread == -1)
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{
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/* This is the devil in the details, a read can terminate early with 0
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* bytes read because of EINTR, yet it still returns -1 otherwise end
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* of file cannot be distinguished.
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*/
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if (errno != EINTR)
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{
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png_warning(png_ptr, "/proc read failed");
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return 0; /* I.e., a permanent failure */
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}
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}
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else if (iread < 0)
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{
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/* Not a valid 'read' result: */
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png_warning(png_ptr, "OS /proc read bug");
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return 0;
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}
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else if (iread > 0)
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{
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/* Continue reading until a permanent failure, or EOF */
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buffer += iread;
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nbytes -= (unsigned int)/*SAFE*/iread;
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ntotal += (unsigned int)/*SAFE*/iread;
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}
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else
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return ntotal;
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}
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return ntotal; /* nbytes == 0 */
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}
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static int
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png_have_neon(png_structp png_ptr)
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{
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int fd = open("/proc/self/auxv", O_RDONLY);
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Elf32_auxv_t aux;
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/* Failsafe: failure to open means no NEON */
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if (fd == -1)
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{
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png_warning(png_ptr, "/proc/self/auxv open failed");
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return 0;
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}
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while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux)
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{
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if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0)
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{
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close(fd);
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return 1;
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}
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}
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close(fd);
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return 0;
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}
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#else
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/* We don't know how to do a run-time check on this system */
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# error "no support for run-time ARM NEON checks"
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#endif /* OS checks */
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#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */
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#ifndef PNG_ALIGNED_MEMORY_SUPPORTED
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# error "ALIGNED_MEMORY is required; set: -DPNG_ALIGNED_MEMORY_SUPPORTED"
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#endif
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void
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png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
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{
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/* The switch statement is compiled in for ARM_NEON_API, the call to
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* png_have_neon is compiled in for ARM_NEON_CHECK. If both are defined
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* the check is only performed if the API has not set the NEON option on
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* or off explicitly. In this case the check controls what happens.
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*
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* If the CHECK is not compiled in and the option is UNSET the behavior prior
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* to 1.6.7 was to use the NEON code - this was a bug caused by having the
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* wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF,
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* as documented in png.h
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*/
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#ifdef PNG_ARM_NEON_API_SUPPORTED
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switch ((pp->options >> PNG_ARM_NEON) & 3)
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{
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case PNG_OPTION_UNSET:
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/* Allow the run-time check to execute if it has been enabled -
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* thus both API and CHECK can be turned on. If it isn't supported
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* this case will fall through to the 'default' below, which just
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* returns.
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*/
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#endif /* PNG_ARM_NEON_API_SUPPORTED */
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#ifdef PNG_ARM_NEON_CHECK_SUPPORTED
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{
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static volatile sig_atomic_t no_neon = -1; /* not checked */
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if (no_neon < 0)
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no_neon = !png_have_neon(pp);
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if (no_neon)
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return;
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}
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#ifdef PNG_ARM_NEON_API_SUPPORTED
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break;
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#endif
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#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */
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#ifdef PNG_ARM_NEON_API_SUPPORTED
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default: /* OFF or INVALID */
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return;
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case PNG_OPTION_ON:
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/* Option turned on */
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break;
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}
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#endif
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/* IMPORTANT: any new external functions used here must be declared using
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* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the
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* 'prefix' option to configure works:
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*
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* ./configure --with-libpng-prefix=foobar_
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*
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* Verify you have got this right by running the above command, doing a build
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* and examining pngprefix.h; it must contain a #define for every external
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* function you add. (Notice that this happens automatically for the
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* initialization function.)
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*/
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pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
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if (bpp == 3)
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{
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pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
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pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
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pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
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png_read_filter_row_paeth3_neon;
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}
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else if (bpp == 4)
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{
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pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
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pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
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pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
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png_read_filter_row_paeth4_neon;
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}
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}
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#endif /* PNG_ARM_NEON_OPT > 0 */
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#endif /* PNG_READ_SUPPORTED */
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235
drivers/png/arm/filter_neon.S
Normal file
235
drivers/png/arm/filter_neon.S
Normal file
@ -0,0 +1,235 @@
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/* filter_neon.S - NEON optimised filter functions
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*
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* Copyright (c) 2013 Glenn Randers-Pehrson
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* Written by Mans Rullgard, 2011.
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* Last changed in libpng 1.5.17 [June 27, 2013]
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*/
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/* This is required to get the symbol renames, which are #defines, and also
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* includes the definition (or not) of PNG_ARM_NEON_OPT.
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*/
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#define PNG_VERSION_INFO_ONLY
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#include "../pngpriv.h"
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#if defined(__linux__) && defined(__ELF__)
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.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
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#endif
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#if PNG_ARM_NEON_OPT > 0
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#ifdef __ELF__
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# define ELF
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#else
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# define ELF @
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#endif
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.arch armv7-a
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.fpu neon
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.macro func name, export=0
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.macro endfunc
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ELF .size \name, . - \name
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.endfunc
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.purgem endfunc
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.endm
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.text
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.if \export
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.global \name
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.endif
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ELF .type \name, STT_FUNC
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.func \name
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\name:
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.endm
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func png_read_filter_row_sub4_neon, export=1
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ldr r3, [r0, #4] @ rowbytes
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vmov.i8 d3, #0
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1:
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vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
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vadd.u8 d0, d3, d4
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vadd.u8 d1, d0, d5
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vadd.u8 d2, d1, d6
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vadd.u8 d3, d2, d7
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vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
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subs r3, r3, #16
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bgt 1b
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bx lr
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endfunc
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func png_read_filter_row_sub3_neon, export=1
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ldr r3, [r0, #4] @ rowbytes
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vmov.i8 d3, #0
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mov r0, r1
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mov r2, #3
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mov r12, #12
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vld1.8 {q11}, [r0], r12
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1:
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vext.8 d5, d22, d23, #3
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vadd.u8 d0, d3, d22
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vext.8 d6, d22, d23, #6
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vadd.u8 d1, d0, d5
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vext.8 d7, d23, d23, #1
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vld1.8 {q11}, [r0], r12
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vst1.32 {d0[0]}, [r1,:32], r2
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vadd.u8 d2, d1, d6
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vst1.32 {d1[0]}, [r1], r2
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vadd.u8 d3, d2, d7
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vst1.32 {d2[0]}, [r1], r2
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vst1.32 {d3[0]}, [r1], r2
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subs r3, r3, #12
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bgt 1b
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bx lr
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endfunc
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func png_read_filter_row_up_neon, export=1
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ldr r3, [r0, #4] @ rowbytes
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1:
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vld1.8 {q0}, [r1,:128]
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vld1.8 {q1}, [r2,:128]!
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vadd.u8 q0, q0, q1
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vst1.8 {q0}, [r1,:128]!
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subs r3, r3, #16
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bgt 1b
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bx lr
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endfunc
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func png_read_filter_row_avg4_neon, export=1
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ldr r12, [r0, #4] @ rowbytes
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vmov.i8 d3, #0
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1:
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vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
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vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]!
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vhadd.u8 d0, d3, d16
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vadd.u8 d0, d0, d4
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vhadd.u8 d1, d0, d17
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vadd.u8 d1, d1, d5
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vhadd.u8 d2, d1, d18
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vadd.u8 d2, d2, d6
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vhadd.u8 d3, d2, d19
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vadd.u8 d3, d3, d7
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vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
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subs r12, r12, #16
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bgt 1b
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bx lr
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endfunc
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func png_read_filter_row_avg3_neon, export=1
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push {r4,lr}
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ldr r12, [r0, #4] @ rowbytes
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vmov.i8 d3, #0
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mov r0, r1
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mov r4, #3
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mov lr, #12
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vld1.8 {q11}, [r0], lr
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1:
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vld1.8 {q10}, [r2], lr
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vext.8 d5, d22, d23, #3
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vhadd.u8 d0, d3, d20
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vext.8 d17, d20, d21, #3
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vadd.u8 d0, d0, d22
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vext.8 d6, d22, d23, #6
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vhadd.u8 d1, d0, d17
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vext.8 d18, d20, d21, #6
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vadd.u8 d1, d1, d5
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vext.8 d7, d23, d23, #1
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vld1.8 {q11}, [r0], lr
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vst1.32 {d0[0]}, [r1,:32], r4
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vhadd.u8 d2, d1, d18
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vst1.32 {d1[0]}, [r1], r4
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vext.8 d19, d21, d21, #1
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vadd.u8 d2, d2, d6
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vhadd.u8 d3, d2, d19
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vst1.32 {d2[0]}, [r1], r4
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vadd.u8 d3, d3, d7
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vst1.32 {d3[0]}, [r1], r4
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subs r12, r12, #12
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bgt 1b
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pop {r4,pc}
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endfunc
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.macro paeth rx, ra, rb, rc
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vaddl.u8 q12, \ra, \rb @ a + b
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vaddl.u8 q15, \rc, \rc @ 2*c
|
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vabdl.u8 q13, \rb, \rc @ pa
|
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vabdl.u8 q14, \ra, \rc @ pb
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vabd.u16 q15, q12, q15 @ pc
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vcle.u16 q12, q13, q14 @ pa <= pb
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vcle.u16 q13, q13, q15 @ pa <= pc
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vcle.u16 q14, q14, q15 @ pb <= pc
|
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vand q12, q12, q13 @ pa <= pb && pa <= pc
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vmovn.u16 d28, q14
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||||
vmovn.u16 \rx, q12
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vbsl d28, \rb, \rc
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vbsl \rx, \ra, d28
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.endm
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func png_read_filter_row_paeth4_neon, export=1
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ldr r12, [r0, #4] @ rowbytes
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vmov.i8 d3, #0
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vmov.i8 d20, #0
|
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1:
|
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vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
|
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vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]!
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paeth d0, d3, d16, d20
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vadd.u8 d0, d0, d4
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paeth d1, d0, d17, d16
|
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vadd.u8 d1, d1, d5
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paeth d2, d1, d18, d17
|
||||
vadd.u8 d2, d2, d6
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||||
paeth d3, d2, d19, d18
|
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vmov d20, d19
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||||
vadd.u8 d3, d3, d7
|
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vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
|
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subs r12, r12, #16
|
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bgt 1b
|
||||
|
||||
bx lr
|
||||
endfunc
|
||||
|
||||
func png_read_filter_row_paeth3_neon, export=1
|
||||
push {r4,lr}
|
||||
ldr r12, [r0, #4] @ rowbytes
|
||||
vmov.i8 d3, #0
|
||||
vmov.i8 d4, #0
|
||||
mov r0, r1
|
||||
mov r4, #3
|
||||
mov lr, #12
|
||||
vld1.8 {q11}, [r0], lr
|
||||
1:
|
||||
vld1.8 {q10}, [r2], lr
|
||||
paeth d0, d3, d20, d4
|
||||
vext.8 d5, d22, d23, #3
|
||||
vadd.u8 d0, d0, d22
|
||||
vext.8 d17, d20, d21, #3
|
||||
paeth d1, d0, d17, d20
|
||||
vst1.32 {d0[0]}, [r1,:32], r4
|
||||
vext.8 d6, d22, d23, #6
|
||||
vadd.u8 d1, d1, d5
|
||||
vext.8 d18, d20, d21, #6
|
||||
paeth d2, d1, d18, d17
|
||||
vext.8 d7, d23, d23, #1
|
||||
vld1.8 {q11}, [r0], lr
|
||||
vst1.32 {d1[0]}, [r1], r4
|
||||
vadd.u8 d2, d2, d6
|
||||
vext.8 d19, d21, d21, #1
|
||||
paeth d3, d2, d19, d18
|
||||
vst1.32 {d2[0]}, [r1], r4
|
||||
vmov d4, d19
|
||||
vadd.u8 d3, d3, d7
|
||||
vst1.32 {d3[0]}, [r1], r4
|
||||
subs r12, r12, #12
|
||||
bgt 1b
|
||||
|
||||
pop {r4,pc}
|
||||
endfunc
|
||||
#endif /* PNG_ARM_NEON_OPT > 0 */
|
||||
Reference in New Issue
Block a user