diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S | 316 |
1 files changed, 158 insertions, 158 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S index 206563438b..d37221f9ab 100644 --- a/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S +++ b/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMem.S @@ -1,158 +1,158 @@ -#/*++ -# -#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: -# -# EfiSetMem.asm -# -#Abstract: -# -# This is the code that supports IA32-optimized SetMem service -# -#--*/ -#include "EfiBind.h" -#--------------------------------------------------------------------------- - .686: - #.MODEL flat,C - .mmx: - .code: - -#--------------------------------------------------------------------------- -.globl ASM_PFX(EfiCommonLibSetMem) - -#VOID -#EfiCommonLibSetMem ( -# IN VOID *Buffer, -# IN UINTN Count, -# IN UINT8 Value -# ) -#/*++ -# -#Input: VOID *Buffer - Pointer to buffer to write -# UINTN Count - Number of bytes to write -# UINT8 Value - Value to write -# -#Output: None. -# -#Saves: -# -#Modifies: -# -#Description: This function is an optimized set-memory function. -# -#Notes: This function tries to set 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_PFX(EfiCommonLibSetMem): - - pushl %ebp - movl %esp, %ebp - subl $0x10, %esp # Reserve space for local variable UINT64 QWordValue @[ebp - 10H] & UINT64 MmxSave @[ebp - 18H] - pushl %ebx - pushl %edi - - movl 0xC(%ebp), %edx # Count - testl %edx, %edx - je _SetMemDone - - pushl %ebx - - movl 8(%ebp), %eax # Buffer - movb 0x10(%ebp), %bl # Value - movl %eax, %edi - movb %bl, %bh - - cmpl $256, %edx - jb _SetRemindingByte - - andb $0x7, %al - testb %al, %al - je _SetBlock - - movl %edi, %eax - shrl $3, %eax - incl %eax - shll $3, %eax - subl %edi, %eax - cmpl %edx, %eax - jnb _SetRemindingByte - - subl %eax, %edx - movl %eax, %ecx - - movb %bl, %al - rep - stosb - -_SetBlock: - movl %edx, %eax - shrl $6, %eax - testl %eax, %eax - je _SetRemindingByte - - shll $6, %eax - subl %eax, %edx - shrl $6, %eax - - movw %bx, -0x10(%ebp) # QWordValue[0] - movw %bx, -0x10+2(%ebp) # QWordValue[2] - movw %bx, -0x10+4(%ebp) # QWordValue[4] - movw %bx, -0x10+6(%ebp) # QWordValue[6] - - - movq %mm0, -8(%ebp) # Save mm0 to MmxSave - movq -0x10(%ebp), %mm0 # Load QWordValue to mm0 - -_B: - movq %mm0, %ds:(%edi) - movq %mm0, %ds:8(%edi) - movq %mm0, %ds:16(%edi) - movq %mm0, %ds:24(%edi) - movq %mm0, %ds:32(%edi) - movq %mm0, %ds:40(%edi) - movq %mm0, %ds:48(%edi) - movq %mm0, %ds:56(%edi) - addl $64, %edi - decl %eax - jnz _B - -# Restore mm0 - movq -8(%ebp), %mm0 # Restore MmxSave to mm0 - emms # Exit MMX Instruction - -_SetRemindingByte: - movl %edx, %ecx - - movl %ebx, %eax - shll $16, %eax - movw %bx, %ax - shrl $2, %ecx - rep - stosl - - movl %edx, %ecx - andl $3, %ecx - rep - stosb - - popl %ebx - -_SetMemDone: - - popl %edi - popl %ebx - leave - ret - -#EfiCommonLibSetMem ENDP - +#/*++
+#
+#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:
+#
+# EfiSetMem.asm
+#
+#Abstract:
+#
+# This is the code that supports IA32-optimized SetMem service
+#
+#--*/
+#include "EfiBind.h"
+#---------------------------------------------------------------------------
+ .686:
+ #.MODEL flat,C
+ .mmx:
+ .code:
+
+#---------------------------------------------------------------------------
+.globl ASM_PFX(EfiCommonLibSetMem)
+
+#VOID
+#EfiCommonLibSetMem (
+# IN VOID *Buffer,
+# IN UINTN Count,
+# IN UINT8 Value
+# )
+#/*++
+#
+#Input: VOID *Buffer - Pointer to buffer to write
+# UINTN Count - Number of bytes to write
+# UINT8 Value - Value to write
+#
+#Output: None.
+#
+#Saves:
+#
+#Modifies:
+#
+#Description: This function is an optimized set-memory function.
+#
+#Notes: This function tries to set 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_PFX(EfiCommonLibSetMem):
+
+ pushl %ebp
+ movl %esp, %ebp
+ subl $0x10, %esp # Reserve space for local variable UINT64 QWordValue @[ebp - 10H] & UINT64 MmxSave @[ebp - 18H]
+ pushl %ebx
+ pushl %edi
+
+ movl 0xC(%ebp), %edx # Count
+ testl %edx, %edx
+ je _SetMemDone
+
+ pushl %ebx
+
+ movl 8(%ebp), %eax # Buffer
+ movb 0x10(%ebp), %bl # Value
+ movl %eax, %edi
+ movb %bl, %bh
+
+ cmpl $256, %edx
+ jb _SetRemindingByte
+
+ andb $0x7, %al
+ testb %al, %al
+ je _SetBlock
+
+ movl %edi, %eax
+ shrl $3, %eax
+ incl %eax
+ shll $3, %eax
+ subl %edi, %eax
+ cmpl %edx, %eax
+ jnb _SetRemindingByte
+
+ subl %eax, %edx
+ movl %eax, %ecx
+
+ movb %bl, %al
+ rep
+ stosb
+
+_SetBlock:
+ movl %edx, %eax
+ shrl $6, %eax
+ testl %eax, %eax
+ je _SetRemindingByte
+
+ shll $6, %eax
+ subl %eax, %edx
+ shrl $6, %eax
+
+ movw %bx, -0x10(%ebp) # QWordValue[0]
+ movw %bx, -0x10+2(%ebp) # QWordValue[2]
+ movw %bx, -0x10+4(%ebp) # QWordValue[4]
+ movw %bx, -0x10+6(%ebp) # QWordValue[6]
+
+
+ movq %mm0, -8(%ebp) # Save mm0 to MmxSave
+ movq -0x10(%ebp), %mm0 # Load QWordValue to mm0
+
+_B:
+ movq %mm0, %ds:(%edi)
+ movq %mm0, %ds:8(%edi)
+ movq %mm0, %ds:16(%edi)
+ movq %mm0, %ds:24(%edi)
+ movq %mm0, %ds:32(%edi)
+ movq %mm0, %ds:40(%edi)
+ movq %mm0, %ds:48(%edi)
+ movq %mm0, %ds:56(%edi)
+ addl $64, %edi
+ decl %eax
+ jnz _B
+
+# Restore mm0
+ movq -8(%ebp), %mm0 # Restore MmxSave to mm0
+ emms # Exit MMX Instruction
+
+_SetRemindingByte:
+ movl %edx, %ecx
+
+ movl %ebx, %eax
+ shll $16, %eax
+ movw %bx, %ax
+ shrl $2, %ecx
+ rep
+ stosl
+
+ movl %edx, %ecx
+ andl $3, %ecx
+ rep
+ stosb
+
+ popl %ebx
+
+_SetMemDone:
+
+ popl %edi
+ popl %ebx
+ leave
+ ret
+
+#EfiCommonLibSetMem ENDP
+
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