1 ;------------------------------------------------------------------------------ 2 ; 3 ; SetMem() worker for ARM 4 ; 5 ; This file started out as C code that did 64 bit moves if the buffer was 6 ; 32-bit aligned, else it does a byte copy. It also does a byte copy for 7 ; any trailing bytes. It was updated to do 32-byte at a time. 8 ; 9 ; Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> 10 ; This program and the accompanying materials 11 ; are licensed and made available under the terms and conditions of the BSD License 12 ; which accompanies this distribution. The full text of the license may be found at 13 ; http://opensource.org/licenses/bsd-license.php 14 ; 15 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 16 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 17 ; 18 19 /** 20 Set Buffer to Value for Size bytes. 21 22 @param Buffer Memory to set. 23 @param Length Number of bytes to set 24 @param Value Value of the set operation. 25 26 @return Buffer 27 28 VOID * 29 EFIAPI 30 InternalMemSetMem ( 31 OUT VOID *Buffer, 32 IN UINTN Length, 33 IN UINT8 Value 34 ) 35 **/ 36 37 38 INCLUDE AsmMacroExport.inc 39 40 RVCT_ASM_EXPORT InternalMemSetMem 41 stmfd sp!, {r4-r11, lr} 42 tst r0, #3 43 movne r3, #0 44 moveq r3, #1 45 cmp r1, #31 46 movls lr, #0 47 andhi lr, r3, #1 48 cmp lr, #0 49 mov r12, r0 50 bne L31 51 L32 52 mov r3, #0 53 b L43 54 L31 55 and r4, r2, #0xff 56 orr r4, r4, r4, LSL #8 57 orr r4, r4, r4, LSL #16 58 mov r5, r4 59 mov r6, r4 60 mov r7, r4 61 mov r8, r4 62 mov r9, r4 63 mov r10, r4 64 mov r11, r4 65 b L32 66 L34 67 cmp lr, #0 68 streqb r2, [r12], #1 69 subeq r1, r1, #1 70 beq L43 71 sub r1, r1, #32 72 cmp r1, #31 73 movls lr, r3 74 stmia r12!, {r4-r11} 75 L43 76 cmp r1, #0 77 bne L34 78 ldmfd sp!, {r4-r11, pc} 79 80 END 81
