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[libpng16] Allow run-time ARM NEON checking to be disabled. A new configure

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option:
    --enable-arm-neon=always will stop the run-time checks. New checks
    within arm/arm_init.c will cause the code not to be compiled unless
    __ARM_NEON__ is set. This should make it fail safe (if someone asks
    for it on then the build will fail if it can't be done.)
Fixed ALIGNED_MEMORY support.
This commit is contained in:
John Bowler
2013-02-18 22:30:35 -06:00
committed by Glenn Randers-Pehrson
parent 0cc3e9e38c
commit 09a5ca72ac
7 changed files with 67 additions and 21 deletions
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9
arm/filter_neon.S
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@@ -10,11 +10,14 @@
* and license in png.h
*/
/* This is required to get the symbol renames, which are #defines */
/* This is required to get the symbol renames, which are #defines, and also
* includes the value of PNG_FILTER_OPTIMIZATIONS.
*/
#define PNG_VERSION_INFO_ONLY
#include "../pngpriv.h"
#ifdef __arm__
#if defined(PNG_FILTER_OPTIMIZATIONS) && defined(__arm__) && \
defined(__ARM_NEON__)
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
#endif
@@ -229,4 +232,4 @@ func png_read_filter_row_paeth3_neon, export=1
pop {r4,pc}
endfunc
#endif
#endif /* FILTER_OPTIMIZATIONS && __arm__ && __ARM_NEON__ */