diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LRotU64.c')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LRotU64.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LRotU64.c b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LRotU64.c new file mode 100644 index 0000000000..6b9e3c0169 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LRotU64.c @@ -0,0 +1,46 @@ +/*++
+
+Copyright (c) 2004 - 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:
+
+ LRotU64.c
+
+Abstract:
+
+
+
+--*/
+
+#include "BaseLibInternals.h"
+
+UINT64
+EFIAPI
+InternalMathLRotU64 (
+ IN UINT64 Operand,
+ IN UINTN Count
+ )
+{
+ _asm {
+ mov cl, byte ptr [Count]
+ mov edx, dword ptr [Operand + 4]
+ mov eax, dword ptr [Operand + 0]
+ shld ebx, edx, cl
+ shld edx, eax, cl
+ ror ebx, cl
+ shld eax, ebx, cl
+ test cl, 32 ; Count >= 32?
+ cmovnz ecx, eax
+ cmovnz eax, edx
+ cmovnz edx, ecx
+ }
+}
+
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