X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseLib%2FIa32%2FSwapBytes64.asm;h=7647880202c47691637ce59a6f6d83d529667ab0;hb=1efcc4ae46f52e3845923ffbab68426e068709d2;hp=72e366bd4d05c3a06ecca93abb44e385b218cdad;hpb=185d764218d07c06838d4758125a5ca66178e7c9;p=mirror_edk2.git

diff --git a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.asm b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.asm
index 72e366bd4d..7647880202 100644
--- a/MdePkg/Library/BaseLib/Ia32/SwapBytes64.asm
+++ b/MdePkg/Library/BaseLib/Ia32/SwapBytes64.asm
@@ -21,13 +21,20 @@
 ;
 ;------------------------------------------------------------------------------
 
-    .586P
+    .586
     .model  flat,C
     .code
 
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathSwapBytes64 (
+;   IN      UINT64                    Operand
+;   );
+;------------------------------------------------------------------------------
 InternalMathSwapBytes64 PROC
-    mov     eax, [esp + 8]
-    mov     edx, [esp + 4]
+    mov     eax, [esp + 8]              ; eax <- upper 32 bits
+    mov     edx, [esp + 4]              ; edx <- lower 32 bits
     bswap   eax
     bswap   edx
     ret