Bug: https://bugzilla.tianocore.org/show_bug.cgi?id=635

Cc: Ruiyu Ni <[email protected]>
Cc: Hao Wu <[email protected]>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Andrew Fish <[email protected]>
---
 DuetPkg/EfiLdr/TianoDecompress.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/DuetPkg/EfiLdr/TianoDecompress.c b/DuetPkg/EfiLdr/TianoDecompress.c
index b504e8e..86d82fc 100644
--- a/DuetPkg/EfiLdr/TianoDecompress.c
+++ b/DuetPkg/EfiLdr/TianoDecompress.c
@@ -91,15 +91,15 @@ Arguments:
 
 Returns: (VOID)
 
 --*/
 {
-  Sd->mBitBuf = (UINT32) (Sd->mBitBuf << NumOfBits);
+  Sd->mBitBuf = (UINT32) (((UINT64)Sd->mBitBuf) << NumOfBits);
 
   while (NumOfBits > Sd->mBitCount) {
 
-    Sd->mBitBuf |= (UINT32) (Sd->mSubBitBuf << (NumOfBits = (UINT16) 
(NumOfBits - Sd->mBitCount)));
+    Sd->mBitBuf |= (UINT32) (((UINT64)Sd->mSubBitBuf) << (NumOfBits = (UINT16) 
(NumOfBits - Sd->mBitCount)));
 
     if (Sd->mCompSize > 0) {
       //
       // Get 1 byte into SubBitBuf
       //
-- 
2.6.1.windows.1

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