diff options
Diffstat (limited to 'MdePkg')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibOptDxe/X64/SetMem.S | 101 |
1 files changed, 47 insertions, 54 deletions
diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/X64/SetMem.S b/MdePkg/Library/BaseMemoryLibOptDxe/X64/SetMem.S index 3453431..e2c4c47 100644 --- a/MdePkg/Library/BaseMemoryLibOptDxe/X64/SetMem.S +++ b/MdePkg/Library/BaseMemoryLibOptDxe/X64/SetMem.S @@ -1,65 +1,58 @@ -;------------------------------------------------------------------------------
-;
-; 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:
-;
-; SetMem.Asm
-;
-; Abstract:
-;
-; SetMem function
-;
-; Notes:
-;
-;------------------------------------------------------------------------------
-
- .code
-
-;------------------------------------------------------------------------------
-; VOID *
-; EFIAPI
-; InternalMemSetMem (
-; IN VOID *Buffer,
-; IN UINTN Count,
-; IN UINT8 Value
-; )
-;------------------------------------------------------------------------------
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+# SetMem.Asm
+#
+# Abstract:
+#
+# SetMem function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+#------------------------------------------------------------------------------
+# VOID *
+# EFIAPI
+# InternalMemSetMem (
+# IN VOID *Buffer,
+# IN UINTN Count,
+# IN UINT8 Value
+# )
+#------------------------------------------------------------------------------
.intel_syntax noprefix
.globl ASM_PFX(InternalMemSetMem)
ASM_PFX(InternalMemZeroMem):
-InternalMemSetMem PROC USES rdi rbx
push rdi
push rbx
- push rcx ; push Buffer
- mov rax, r8 ; rax = Value
- and rax, 0ffh ; rax = lower 8 bits of r8, upper 56 bits are 0
- mov ah, al ; ah = al
- mov bx, ax ; bx = ax
- shl rax, 10h ; rax = ax << 16
- mov ax, bx ; ax = bx
- mov rbx, rax ; ebx = eax
- shl rax, 20h ; rax = rax << 32
- or rax, rbx ; eax = ebx
- mov rdi, rcx ; rdi = Buffer
- mov rcx, rdx ; rcx = Count
- shr rcx, 3 ; rcx = rcx / 8
+ push rcx # push Buffer
+ mov rax, r8 # rax = Value
+ and rax, 0xff # rax = lower 8 bits of r8, upper 56 bits are 0
+ mov ah, al # ah = al
+ mov bx, ax # bx = ax
+ shl rax, 0x10 # rax = ax << 16
+ mov ax, bx # ax = bx
+ mov rbx, rax # ebx = eax
+ shl rax, 0x20 # rax = rax << 32
+ or rax, rbx # eax = ebx
+ mov rdi, rcx # rdi = Buffer
+ mov rcx, rdx # rcx = Count
+ shr rcx, 3 # rcx = rcx / 8
cld
rep stosq
- mov rcx, rdx ; rcx = rdx
- and rcx, 7 ; rcx = rcx & 7
+ mov rcx, rdx # rcx = rdx
+ and rcx, 7 # rcx = rcx & 7
rep stosb
- pop rax ; rax = Buffer
+ pop rax # rax = Buffer
pop rbx
pop rdi
ret
-InternalMemSetMem ENDP
-
- END
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