From: Marc Hoffman <mmhoffm@gmail.com>
Date: Wed, 13 Jun 2007 11:09:07 +0000 (+0000)
Subject: Blackfin - read_time primitive
X-Git-Tag: v0.5~8708
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f70c2739022ab338611ec034ad7504b3534b650c;p=platform%2Fupstream%2Flibav.git

Blackfin - read_time primitive
note this primitive currently uses a union to concatenate 2x32bit registers because of poor compiler support
around DImode and asm.

Originally committed as revision 9302 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavutil/common.h b/libavutil/common.h
index 313658c..b9fd06d 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -267,7 +267,7 @@ static inline int ff_get_fourcc(const char *s){
         }\
     }
 
-#if defined(ARCH_X86) || defined(ARCH_POWERPC)
+#if defined(ARCH_X86) || defined(ARCH_POWERPC) || defined(ARCH_BFIN)
 #if defined(ARCH_X86_64)
 static inline uint64_t read_time(void)
 {
@@ -286,6 +286,19 @@ static inline long long read_time(void)
         );
         return l;
 }
+#elif ARCH_BFIN
+static inline uint64_t read_time(void)
+{
+    union {
+        struct {
+            unsigned lo;
+            unsigned hi;
+        } p;
+        unsigned long long c;
+    } t;
+    asm volatile ("%0=cycles; %1=cycles2;" : "=d" (t.p.lo), "=d" (t.p.hi));
+    return t.c;
+}
 #else //FIXME check ppc64
 static inline uint64_t read_time(void)
 {