Merge commit 'eba2233b'

* commit 'eba2233b':
  build: Add define for SIMD extensions requiring 16-byte aligned buffers

Conflicts:
	configure
	libavcodec/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -1582,6 +1582,7 @@ ARCH_FEATURES="
     local_aligned_8
     local_aligned_16
     local_aligned_32
+    simd_align_16
 "
 
 BUILTIN_LIST="
@@ -1997,8 +1998,7 @@ aligned_stack_if_any="aarch64 ppc x86"
 fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 sparc64 x86_64"
 fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
 fast_unaligned_if_any="aarch64 ppc x86"
-
-need_memalign="altivec neon sse"
+simd_align_16_if_any="altivec neon sse"
 
 # system capabilities
 
@@ -5191,7 +5191,7 @@ enabled_all dxva2 dxva2api_cobj CoTaskMemFree &&
     enable dxva2_lib
 
 ! enabled_any memalign posix_memalign aligned_malloc &&
-    enabled_any $need_memalign && enable memalign_hack
+    enabled $simd_align_16 && enable memalign_hack
 
 # add_dep lib dep
 # -> enable ${lib}_deps_${dep}

libavcodec/internal.h

@@ -37,7 +37,7 @@
 
 #if HAVE_AVX
 #   define STRIDE_ALIGN 32
-#elif HAVE_NEON || ARCH_PPC || HAVE_MMX
+#elif HAVE_SIMD_ALIGN_16
 #   define STRIDE_ALIGN 16
 #else
 #   define STRIDE_ALIGN 8