From: Måns Rullgård <mans@mansr.com>
Date: Thu, 31 Jul 2008 02:38:40 +0000 (+0000)
Subject: fix ARMv6 FASTDIV for divisor <=2
X-Git-Tag: v0.5~3416
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c8fd5da42fffc92268a0e23335af36580f2a2a4b;p=platform%2Fupstream%2Flibav.git

fix ARMv6 FASTDIV for divisor <=2

Originally committed as revision 14481 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavutil/internal.h b/libavutil/internal.h
index 32db7f5..4832ef1 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -150,7 +150,10 @@ extern const uint32_t ff_inverse[256];
 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]));
+    asm volatile("cmp   %2, #0        \n\t"
+                 "smmul %0, %1, %2    \n\t"
+                 "rsblt %0, %0, #0    \n\t"
+                 : "=r"(r) : "r"(a), "r"(ff_inverse[b]));
     return r;
 }
 #elif defined(ARCH_ARMV4L)