MdePkg BaseMemoryLibMmx: Convert X64/CopyMem.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/CopyMem.asm to X64/CopyMem.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Jordan Justen 2016-05-30 18:52:07 -07:00 committed by Liming Gao
parent 9692aa2060
commit eadcb0a18f
2 changed files with 76 additions and 0 deletions

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@ -116,6 +116,7 @@
X64/SetMem16.asm
X64/SetMem.nasm
X64/SetMem.asm
X64/CopyMem.nasm
X64/CopyMem.asm
X64/ScanMem64.nasm
X64/ScanMem64.S
@ -137,6 +138,7 @@
X64/ZeroMem.S
X64/SetMem.nasm
X64/SetMem.S
X64/CopyMem.nasm
X64/CopyMem.S

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@ -0,0 +1,74 @@
;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. 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.
;
; Module Name:
;
; CopyMem.nasm
;
; Abstract:
;
; CopyMem function
;
; Notes:
;
;------------------------------------------------------------------------------
DEFAULT REL
SECTION .text
;------------------------------------------------------------------------------
; VOID *
; EFIAPI
; InternalMemCopyMem (
; OUT VOID *DestinationBuffer,
; IN CONST VOID *SourceBuffer,
; IN UINTN Length
; );
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemCopyMem)
ASM_PFX(InternalMemCopyMem):
push rsi
push rdi
mov rsi, rdx ; rsi <- Source
mov rdi, rcx ; rdi <- Destination
lea r9, [rsi + r8 - 1] ; r9 <- End of Source
cmp rsi, rdi
mov rax, rdi ; rax <- Destination as return value
jae .0
cmp r9, rdi
jae @CopyBackward ; Copy backward if overlapped
.0:
mov rcx, r8
and r8, 7
shr rcx, 3 ; rcx <- # of Qwords to copy
jz @CopyBytes
DB 0x49, 0xf, 0x7e, 0xc2 ; movd r10, mm0 (Save mm0 in r10)
.1:
DB 0xf, 0x6f, 0x6 ; movd mm0, [rsi]
DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0
add rsi, 8
add rdi, 8
loop .1
mfence
DB 0x49, 0xf, 0x6e, 0xc2 ; movd mm0, r10 (Restore mm0)
jmp @CopyBytes
@CopyBackward:
mov rsi, r9 ; rsi <- End of Source
lea rdi, [rdi + r8 - 1] ; rdi <- End of Destination
std ; set direction flag
@CopyBytes:
mov rcx, r8
rep movsb ; Copy bytes backward
cld
pop rdi
pop rsi
ret