;------------------------------------------------------------------------------ | |
; | |
; 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 |