From 733c293541a530b3686c298076519eb84ecd8f72 Mon Sep 17 00:00:00 2001 From: Jordan Justen Date: Mon, 30 May 2016 18:52:12 -0700 Subject: MdePkg BaseMemoryLibSse2: Convert Ia32/CopyMem.asm to NASM The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert Ia32/CopyMem.asm to Ia32/CopyMem.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen --- .../BaseMemoryLibSse2/BaseMemoryLibSse2.inf | 2 + MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm | 84 ++++++++++++++++++++++ 2 files changed, 86 insertions(+) create mode 100644 MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm (limited to 'MdePkg/Library') diff --git a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf index 89056bdf1f..87e1c1e2f5 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf +++ b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf @@ -65,6 +65,7 @@ Ia32/SetMem16.S Ia32/SetMem.nasm Ia32/SetMem.S + Ia32/CopyMem.nasm Ia32/CopyMem.S Ia32/ScanMem64.nasm Ia32/ScanMem64.asm @@ -86,6 +87,7 @@ Ia32/SetMem16.asm Ia32/SetMem.nasm Ia32/SetMem.asm + Ia32/CopyMem.nasm Ia32/CopyMem.asm [Sources.X64] diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm new file mode 100644 index 0000000000..967b636c31 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm @@ -0,0 +1,84 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2006, Intel Corporation. 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. +; +; Module Name: +; +; CopyMem.nasm +; +; Abstract: +; +; CopyMem function +; +; Notes: +; +;------------------------------------------------------------------------------ + + SECTION .text + +;------------------------------------------------------------------------------ +; VOID * +; InternalMemCopyMem ( +; IN VOID *Destination, +; IN VOID *Source, +; IN UINTN Count +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(InternalMemCopyMem) +ASM_PFX(InternalMemCopyMem): + push esi + push edi + mov esi, [esp + 16] ; esi <- Source + mov edi, [esp + 12] ; edi <- Destination + mov edx, [esp + 20] ; edx <- Count + lea eax, [esi + edx - 1] ; eax <- End of Source + cmp esi, edi + jae .0 + cmp eax, edi ; Overlapped? + jae @CopyBackward ; Copy backward if overlapped +.0: + xor ecx, ecx + sub ecx, edi + and ecx, 15 ; ecx + edi aligns on 16-byte boundary + jz .1 + cmp ecx, edx + cmova ecx, edx + sub edx, ecx ; edx <- remaining bytes to copy + rep movsb +.1: + mov ecx, edx + and edx, 15 + shr ecx, 4 ; ecx <- # of DQwords to copy + jz @CopyBytes + add esp, -16 + movdqu [esp], xmm0 ; save xmm0 +.2: + movdqu xmm0, [esi] ; esi may not be 16-bytes aligned + movntdq [edi], xmm0 ; edi should be 16-bytes aligned + add esi, 16 + add edi, 16 + loop .2 + mfence + movdqu xmm0, [esp] ; restore xmm0 + add esp, 16 ; stack cleanup + jmp @CopyBytes +@CopyBackward: + mov esi, eax ; esi <- Last byte in Source + lea edi, [edi + edx - 1] ; edi <- Last byte in Destination + std +@CopyBytes: + mov ecx, edx + rep movsb + cld + mov eax, [esp + 12] ; eax <- Destination as return value + pop edi + pop esi + ret + -- cgit v1.2.3