diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/RShiftU64.c')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/RShiftU64.c | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/RShiftU64.c b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/RShiftU64.c deleted file mode 100644 index 8c9da33727..0000000000 --- a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/RShiftU64.c +++ /dev/null @@ -1,71 +0,0 @@ -/*++
-
-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
-
-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:
-
- RShiftU64.c
-
-Abstract:
-
- 64-bit right shift function for IA-32
-
---*/
-
-#include "Tiano.h"
-
-UINT64
-RShiftU64 (
- IN UINT64 Operand,
- IN UINTN Count
- )
-/*++
-
-Routine Description:
- This routine allows a 64 bit value to be right shifted by 32 bits and returns the
- shifted value.
- Count is valid up 63. (Only Bits 0-5 is valid for Count)
-Arguments:
- Operand - Value to be shifted
- Count - Number of times to shift right.
-
-Returns:
-
- Value shifted right identified by the Count.
-
---*/
-{
- __asm {
-
- mov eax, dword ptr Operand[0]
- mov edx, dword ptr Operand[4]
-
- ;
- ; CL is valid from 0 - 31. shld will move EDX:EAX by CL times but EDX is not touched
- ; For CL of 32 - 63, it will be shifted 0 - 31 so we will move edx to eax later.
- ;
- mov ecx, Count
- and ecx, 63
- shrd eax, edx, cl
- shr edx, cl
-
- cmp ecx, 32
- jc short _RShiftU64_Done
-
- ;
- ; Since Count is 32 - 63, edx will have been shifted by 0 - 31
- ; If shifted by 32 or more, set upper 32 bits to zero.
- ;
- mov eax, edx
- xor edx, edx
-
-_RShiftU64_Done:
- }
-}
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