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authorDavid Conrad <lessen42@gmail.com>2010-06-29 06:42:12 +0000
committerDavid Conrad <lessen42@gmail.com>2010-06-29 06:42:12 +0000
commit7bf4e9d7f7b21f2bbc6a9c39e38549dc2d1c57ba (patch)
tree610e09ae82a9ecec1adb290a63543705b649e768 /libavcodec/ppc
parenta3ef994cea2319ff3cf2e634b5ab3d278e18a06c (diff)
downloadffmpeg-7bf4e9d7f7b21f2bbc6a9c39e38549dc2d1c57ba.tar.gz
Altivec: Add helper function to load from a constant misalignment
Originally committed as revision 23883 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/ppc')
-rw-r--r--libavcodec/ppc/util_altivec.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/libavcodec/ppc/util_altivec.h b/libavcodec/ppc/util_altivec.h
index 62f228a275..cb638dff08 100644
--- a/libavcodec/ppc/util_altivec.h
+++ b/libavcodec/ppc/util_altivec.h
@@ -32,6 +32,8 @@
#include <altivec.h>
#endif
+#include "types_altivec.h"
+
// used to build registers permutation vectors (vcprm)
// the 's' are for words in the _s_econd vector
#define WORD_0 0x00,0x01,0x02,0x03
@@ -102,4 +104,15 @@ static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
return vec_perm(first, second, mask);
}
+/**
+ * loads vector known misalignment
+ * @param perm_vec the align permute vector to combine the two loads from lvsl
+ */
+static inline vec_u8 load_with_perm_vec(int offset, uint8_t *src, vec_u8 perm_vec)
+{
+ vec_u8 a = vec_ld(offset, src);
+ vec_u8 b = vec_ld(offset+15, src);
+ return vec_perm(a, b, perm_vec);
+}
+
#endif /* AVCODEC_PPC_UTIL_ALTIVEC_H */