From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 9 Oct 2006 10:09:26 +0000 (+0000)
Subject: Fix a bug in InternalMathDivRemU64x64(). The bug is that the 64-bit divisor is design... 
X-Git-Tag: edk2-stable201903~24181
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=2f8df870031e1aee978635bb5cfa2f5a23f9b3f5;ds=sidebyside

Fix a bug in InternalMathDivRemU64x64(). The bug is that the 64-bit divisor is designed to be loaded to ecx:ebx but the high 4 byte of the divisor is forgotten to be loaded to ecx

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1693 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.c b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.c
index 62034f7b84..2a893147c7 100644
--- a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.c
+++ b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.c
@@ -28,6 +28,7 @@ InternalMathDivRemU64x64 (
     mov     eax, dword ptr [Dividend + 0]   // edx:eax <- dividend
     mov     edi, edx
     mov     esi, eax                    // edi:esi <- dividend
+    mov     ecx, dword ptr [Divisor + 4]
     mov     ebx, dword ptr [Divisor + 0]   // ecx:ebx <- divisor
 BitLoop:
     shr     edx, 1