diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemSSE2.c')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemSSE2.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemSSE2.c b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemSSE2.c deleted file mode 100644 index 09ac64fc14..0000000000 --- a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiZeroMemSSE2.c +++ /dev/null @@ -1,111 +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:
-
- EfiZeroMemSSE2.c
-
-Abstract:
-
- This is the code that supports IA32-optimized ZeroMem service
-
---*/
-
-#include "Tiano.h"
-
-VOID
-EfiCommonLibZeroMem (
- IN VOID *Buffer,
- IN UINTN Count
- )
-/*++
-
-Input: VOID *Buffer - Pointer to buffer to clear
- UINTN Count - Number of bytes to clear
-
-Output: None.
-
-Saves:
-
-Modifies:
-
-Description: This function is an optimized zero-memory function.
-
-Notes: This function tries to zero memory 8 bytes at a time. As a result,
- it first picks up any misaligned bytes, then words, before getting
- in the main loop that does the 8-byte clears.
-
---*/
-{
- __asm {
- mov ecx, Count
- mov edi, Buffer
-
- ; Pick up misaligned start bytes (get pointer 4-byte aligned)
-_StartByteZero:
- mov eax, edi
- and al, 3 ; check lower 2 bits of address
- test al, al
- je _ZeroBlocks ; already aligned?
- cmp ecx, 0
- je _ZeroMemDone
-
- ; Clear the byte memory location
- mov BYTE PTR [edi], 0
- inc edi
-
- ; Decrement our count
- dec ecx
- jmp _StartByteZero ; back to top of loop
-
-_ZeroBlocks:
-
- ; Compute how many 64-byte blocks we can clear
- mov edx, ecx
- shr ecx, 6 ; convert to 64-byte count
- shl ecx, 6 ; convert back to bytes
- sub edx, ecx ; subtract from the original count
- shr ecx, 6 ; and this is how many 64-byte blocks
-
- ; If no 64-byte blocks, then skip
- cmp ecx, 0
- je _ZeroRemaining
-
- xorps xmm1, xmm1
-
-_B:
- movdqu OWORD PTR ds:[edi], xmm1
- movdqu OWORD PTR ds:[edi+16], xmm1
- movdqu OWORD PTR ds:[edi+32], xmm1
- movdqu OWORD PTR ds:[edi+48], xmm1
-
- add edi, 64
- dec ecx
- jnz _B
-
-
-_ZeroRemaining:
- ; Zero out as many DWORDS as possible
- mov ecx, edx
- shr ecx, 2
- xor eax, eax
-
- rep stosd
-
- ; Zero out remaining as bytes
- mov ecx, edx
- and ecx, 03
-
- rep stosb
-
-_ZeroMemDone:
- }
-}
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