From d39eb83cc5ce2147264e2ea3566c4dbf7eb9888d Mon Sep 17 00:00:00 2001
From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 21 Apr 2010 22:04:35 +0000
Subject: Add some ldm/vldm optimized CopyMem routines. Add performance macros
 to BDS

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10388 6f19259b-4bc3-4df7-8a09-765794883524
---
 ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm | 83 ++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100755 ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm

(limited to 'ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm')

diff --git a/ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm b/ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm
new file mode 100755
index 0000000000..7304f1c509
--- /dev/null
+++ b/ArmPkg/Library/BaseMemoryLibStm/Arm/SetMem.asm
@@ -0,0 +1,83 @@
+;------------------------------------------------------------------------------ 
+;
+; 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. It was updated to do 32-byte at a time.
+;
+; Copyright (c) 2008-2010 Apple Inc. All rights reserved.<BR>
+; 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.
+;
+
+/**
+  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!, {r4-r11, lr}
+	tst	  r0, #3
+	movne	r3, #0
+	moveq	r3, #1
+	cmp	  r1, #31
+	movls lr, #0
+	andhi	lr, r3, #1
+	cmp	  lr, #0
+	mov	  r12, r0
+	bne	  L31
+L32
+	mov	  r3, #0
+	b	    L43
+L31
+  and   r4, r2, #0xff
+  orr   r4, r4, r4, LSL #8
+  orr   r4, r4, r4, LSL #16  
+	mov   r5, r4
+	mov   r5, r4
+	mov   r6, r4
+	mov   r7, r4 
+	mov   r8, r4 
+	mov   r9, r4 
+	mov   r10, r4 
+	mov   r11, r4 
+	b	    L32
+L34
+	cmp	    lr, #0
+	streqb	r2, [r12], #1
+	subeq	  r1, r1, #1
+	beq	    L43
+	sub	    r1, r1, #32
+	cmp	    r1, #31
+	movls	  lr, r3
+	stmia	  r12!, {r4-r11}
+L43
+	cmp	    r1, #0
+	bne	    L34
+	ldmfd	  sp!, {r4-r11, pc}
+	
+  END
+  
\ No newline at end of file
-- 
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