From 0269fb11e3de17375f86d9120599af8c87cdfa0a Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 8 Nov 2015 13:25:54 +0100
Subject: [PATCH] avutil/softfloat: Check for MIN_EXP in av_sqrt_sf()

Otherwise the exponent could eventually underflow

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavutil/softfloat.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavutil/softfloat.h b/libavutil/softfloat.h
index 53356697df..023ccd0930 100644
--- a/libavutil/softfloat.h
+++ b/libavutil/softfloat.h
@@ -181,6 +181,10 @@ static av_always_inline SoftFloat av_sqrt_sf(SoftFloat val)
             val.mant >>= 1;
 
         val.exp = (val.exp >> 1) + 1;
+        if (val.exp < MIN_EXP) {
+            val.exp = MIN_EXP;
+            val.mant= 0;
+        }
     }
 
     return val;