X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OldMdePkg%2FLibrary%2FBaseLib%2FIa32%2FRRotU64.S;fp=OldMdePkg%2FLibrary%2FBaseLib%2FIa32%2FRRotU64.S;h=35935639b9b68f0ebb9e2d222c4da2eb3fd0b19e;hp=0000000000000000000000000000000000000000;hb=586cd1f1f4129ab7ec24543d4968801e17cc870b;hpb=144d783d40c8a02113350feabd1b9a55b692313f

diff --git a/OldMdePkg/Library/BaseLib/Ia32/RRotU64.S b/OldMdePkg/Library/BaseLib/Ia32/RRotU64.S
new file mode 100644
index 0000000000..35935639b9
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Ia32/RRotU64.S
@@ -0,0 +1,46 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. 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
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+#   RRotU64.asm
+#
+# Abstract:
+#
+#   64-bit right rotation for Ia32
+#
+#------------------------------------------------------------------------------
+
+.globl ASM_PFX(InternalMathRRotU64)
+
+#------------------------------------------------------------------------------
+# UINT64
+# EFIAPI
+# InternalMathRRotU64 (
+#   IN      UINT64                    Operand,
+#   IN      UINTN                     Count
+#   );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalMathRRotU64):
+    push    %ebx
+    movb    16(%esp), %cl
+    movl    8(%esp), %eax
+    movl    12(%esp), %edx
+    shrdl   %cl, %eax, %ebx
+    shrdl   %cl, %edx, %eax
+    roll    %cl, %ebx
+    shrdl   %cl, %ebx, %edx
+    testb   $32, %cl
+    cmovnz  %eax, %ecx
+    cmovnz  %edx, %eax
+    cmovnz  %ecx, %edx
+    pop     %ebx
+    ret