Initial release, used to benchmark fastmemcpy.h code from libvo.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@563 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 37 insertions, 0 deletions

diff --git a/TOOLS/fastmemcpybench.c b/TOOLS/fastmemcpybench.c
new file mode 100644
index 0000000000..e7115ff72e
--- /dev/null
+++ b/TOOLS/fastmemcpybench.c
@@ -0,0 +1,37 @@
+/*
+   fastmemcpybench.c used to benchmark fastmemcpy.h code from libvo.
+     
+   Note: this code can not be used on PentMMX-PII because they contain
+   a bug in rdtsc. For Intel processors since P6(PII) rdpmc should be used
+   instead. For PIII it's disputable and seems bug was fixed but I don't
+   tested it.
+*/
+
+#include <stdio.h>
+
+#include "../libvo/fastmemcpy.h"
+
+#define ARR_SIZE 100000
+//#define ARR_SIZE 1000000
+
+static inline unsigned long long int read_tsc( void )
+{
+  unsigned long long int retval;
+  __asm __volatile ("rdtsc":"=A"(retval)::"memory");
+  return retval;
+}
+
+unsigned char arr1[ARR_SIZE],arr2[ARR_SIZE];
+
+int main( void )
+{
+  unsigned long long int v1,v2;
+  unsigned char * marr1,*marr2;
+  marr1 = &arr1[1];
+  marr2 = &arr2[3];
+  v1 = read_tsc();
+  memcpy(marr1,marr2,ARR_SIZE-4);
+  v2 = read_tsc();
+  printf("v1 = %llu v2 = %llu v2-v1=%llu\n",v1,v2,v2-v1);
+  return 0;
+}