From 8176bd1a4689ff08b0e85984563ad8288110f1a7 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 25 Jun 2004 18:39:57 +0000
Subject: overflow fix

Originally committed as revision 3250 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 tests/tiny_psnr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'tests/tiny_psnr.c')

diff --git a/tests/tiny_psnr.c b/tests/tiny_psnr.c
index 84ad90ebce..572dd27558 100644
--- a/tests/tiny_psnr.c
+++ b/tests/tiny_psnr.c
@@ -68,9 +68,10 @@ static uint64_t log16(uint64_t a){
     a<<=16;
     
     for(i=19;i>=0;i--){
-        if(a<(exp16_table[i]<<16)) continue;
+        int64_t b= exp16_table[i];
+        if(a<(b<<16)) continue;
         out |= 1<<i;
-        a = ((a<<16) + exp16_table[i]/2)/exp16_table[i];
+        a = ((a/b)<<16) + (((a%b)<<16) + b/2)/b;
     }
     return out;
 }
-- 
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