X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseLib%2FIa32%2FRRotU64.asm;h=4c58878ace0d11f6f81fc53843378d3e2287b176;hp=062e201e8dfebb69a2ab310b4b174e5fea161e60;hb=3f566587aea64bb986866c7f69a6b82891bf59db;hpb=31a9215c3223d3818d1709f39d06774e18df103f

diff --git a/MdePkg/Library/BaseLib/Ia32/RRotU64.asm b/MdePkg/Library/BaseLib/Ia32/RRotU64.asm
index 062e201e8d..4c58878ace 100644
--- a/MdePkg/Library/BaseLib/Ia32/RRotU64.asm
+++ b/MdePkg/Library/BaseLib/Ia32/RRotU64.asm
@@ -23,6 +23,14 @@
     .model  flat,C
     .code
 
+;------------------------------------------------------------------------------
+; UINT64
+; EFIAPI
+; InternalMathRRotU64 (
+;   IN      UINT64                    Operand,
+;   IN      UINTN                     Count
+;   );
+;------------------------------------------------------------------------------
 InternalMathRRotU64 PROC    USES    ebx
     mov     cl, [esp + 16]
     mov     eax, [esp + 8]
@@ -31,7 +39,7 @@ InternalMathRRotU64 PROC    USES    ebx
     shrd    eax, edx, cl
     rol     ebx, cl
     shrd    edx, ebx, cl
-    test    cl, 32
+    test    cl, 32                      ; Count >= 32?
     cmovnz  ecx, eax
     cmovnz  eax, edx
     cmovnz  edx, ecx