ARM: ARMv6 optimised FASTDIV

Originally committed as revision 14242 to svn://svn.ffmpeg.org/ffmpeg/trunk
17 years ago · 6651ce17b8
parent de0e19cc38
commit 6651ce17b8
1 changed files with 7 additions and 0 deletions
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@ -154,6 +154,13 @@ extern const uint32_t ff_inverse[256];
            );\
        ret;\
    })
+#elif defined(HAVE_ARMV6)
+static inline av_const int FASTDIV(int a, int b)
+{
+    int r;
+    asm volatile("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(ff_inverse[b]));
+    return r;
+}
 #elif defined(ARCH_ARMV4L)
 #    define FASTDIV(a,b) \
    ({\