Luca Barbato <[email protected]> writes: > On 01/05/12 09:43, Ronald S. Bultje wrote: >> Hi, >> >> On Tue, May 1, 2012 at 9:40 AM, Måns Rullgård <[email protected]> wrote: >>> "Ronald S. Bultje" <[email protected]> writes: >>> >>>> From: "Ronald S. Bultje" <[email protected]> >>>> >>>> It was to signal that allocations are 16-byte aligned, but AVX requires >>>> 32-byte alignment, thus the check is no longer useful (and causes >>>> crashes). >>>> --- >>>> configure | 7 +------ >>>> 1 file changed, 1 insertion(+), 6 deletions(-) >>>> >>>> diff --git a/configure b/configure >>>> index bc12f33..c8bb63f 100755 >>>> --- a/configure >>>> +++ b/configure >>>> @@ -2465,7 +2465,6 @@ case $target_os in >>>> oss_outdev_extralibs="-lossaudio" >>>> ;; >>>> openbsd) >>>> - enable malloc_aligned >>>> # On OpenBSD 4.5. the compiler does not use PIC unless >>>> # explicitly using -fPIC. Libav builds fine without PIC, >>>> # however the generated executable will not do anything >>>> @@ -2478,17 +2477,14 @@ case $target_os in >>>> oss_outdev_extralibs="-lossaudio" >>>> ;; >>>> dragonfly) >>>> - enable malloc_aligned >>>> disable symver >>>> ;; >>>> freebsd) >>>> - enable malloc_aligned >>>> ;; >>>> bsd/os) >>>> add_extralibs -lpoll -lgnugetopt >>>> ;; >>>> darwin) >>>> - enable malloc_aligned >>>> gas="gas-preprocessor.pl $cc" >>>> enabled ppc && add_asflags -force_cpusubtype_ALL >>>> SHFLAGS='-dynamiclib -Wl,-single_module >>>> -Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)' >>>> @@ -2511,7 +2507,6 @@ case $target_os in >>>> fi >>>> LIBTARGET=i386 >>>> if enabled x86_64; then >>>> - enable malloc_aligned >>>> LIBTARGET="i386:x86-64" >>>> elif enabled arm; then >>>> LIBTARGET=arm-wince >>>> @@ -3191,7 +3186,7 @@ check_deps $CONFIG_LIST \ >>>> >>>> enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; } >>>> >>>> -! enabled_any memalign posix_memalign malloc_aligned && >>>> +! enabled_any memalign posix_memalign && >>>> enabled_any $need_memalign && enable memalign_hack >>>> >>>> echo "install prefix $prefix" >>>> -- >>> >>> Which of those systems lack both memalign() and posix_memalign()? Do >>> any of these support AVX at all? >> >> osx has posix_memalign. Mingw lacks both. Rest don't know. > > bsds should have memalign and posix_memalign. > > The posix_memalign() function first appeared in FreeBSD 7.0.
What alignment is provided by malloc() on 64-bit mingw, and does anyone care if the manual alignment gets needlessly enabled there in some case? Since all the other systems appear to have [posix_]memalign, this should be fine on those. -- Måns Rullgård [email protected] _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
