X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;ds=sidebyside;f=MdePkg%2FLibrary%2FBaseLib%2FIa32%2FDivU64x32Remainder.asm;h=1634ef478e29d05cd694363b2196e71463a33257;hb=bb817c56c51fabe92915fe30b168b4833cb2aed9;hp=f1c6c1f4acd1535295ba7f21b8707a8cf6aacab8;hpb=185d764218d07c06838d4758125a5ca66178e7c9;p=mirror_edk2.git

diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm b/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
index f1c6c1f4ac..1634ef478e 100644
--- a/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
+++ b/MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.asm
@@ -1,7 +1,7 @@
 ;------------------------------------------------------------------------------
 ;
-; Copyright (c) 2006, Intel Corporation
-; All rights reserved. This program and the accompanying materials
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
 ; are licensed and made available under the terms and conditions of the BSD License
 ; which accompanies this distribution.  The full text of the license may be found at
 ; http://opensource.org/licenses/bsd-license.php
@@ -23,19 +23,28 @@
     .model  flat,C
     .code
 
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathDivRemU64x32 (
+;   IN      UINT64                    Dividend,
+;   IN      UINT32                    Divisor,
+;   OUT     UINT32                    *Remainder
+;   );
+;------------------------------------------------------------------------------
 InternalMathDivRemU64x32    PROC
-    mov     ecx, [esp + 12]
-    mov     eax, [esp + 8]
+    mov     ecx, [esp + 12]         ; ecx <- divisor
+    mov     eax, [esp + 8]          ; eax <- dividend[32..63]
     xor     edx, edx
-    div     ecx
+    div     ecx                     ; eax <- quotient[32..63], edx <- remainder
     push    eax
-    mov     eax, [esp + 8]
-    div     ecx
-    mov     ecx, [esp + 20]
-    jecxz   @F
+    mov     eax, [esp + 8]          ; eax <- dividend[0..31]
+    div     ecx                     ; eax <- quotient[0..31]
+    mov     ecx, [esp + 20]         ; ecx <- Remainder
+    jecxz   @F                      ; abandon remainder if Remainder == NULL
     mov     [ecx], edx
 @@:
-    pop     edx
+    pop     edx                     ; edx <- quotient[32..63]
     ret
 InternalMathDivRemU64x32    ENDP