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;------------------------------------------------------------------------------
;
; SetMem() worker for ARM
;
; This file started out as C code that did 64 bit moves if the buffer was
; 32-bit aligned, else it does a byte copy. It also does a byte copy for
; any trailing bytes. Update to use VSTM/VLDM to do 128 byte writes.
;
; Copyright (c) 2008 - 2010, Apple Inc. 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.
;
/**
Set Buffer to Value for Size bytes.
@param Buffer Memory to set.
@param Length Number of bytes to set
@param Value Value of the set operation.
@return Buffer
VOID *
EFIAPI
InternalMemSetMem (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT8 Value
)
**/
EXPORT InternalMemSetMem
AREA AsmMemStuff, CODE, READONLY
InternalMemSetMem
stmfd sp!, {lr}
tst r0, #3
movne r3, #0
moveq r3, #1
cmp r1, #127
movls lr, #0
andhi lr, r3, #1
cmp lr, #0
mov r12, r0
bne L31
L32
mov r3, #0
b L43
L31
vdup.8 q0,r2
vmov q1,q0
vmov q2,q0
vmov q3,q0
vmov q4,q0
vmov q5,q0
vmov q6,q0
vmov q7,q0
b L32
L34
cmp lr, #0
streqb r2, [r12], #1
subeq r1, r1, #1
beq L43
sub r1, r1, #128
cmp r1, #127
movls lr, r3
vstm r12!, {d0-d15}
L43
cmp r1, #0
bne L34
ldmfd sp!, {pc}
END
|
