From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm  | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 roms/edk2/MdePkg/Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm

(limited to 'roms/edk2/MdePkg/Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm')

diff --git a/roms/edk2/MdePkg/Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm b/roms/edk2/MdePkg/Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm
new file mode 100644
index 000000000..16fd931c0
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseMemoryLibOptPei/X64/ScanMem8.nasm
@@ -0,0 +1,49 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   ScanMem8.Asm
+;
+; Abstract:
+;
+;   ScanMem8 function
+;
+; Notes:
+;
+;   The following BaseMemoryLib instances contain the same copy of this file:
+;
+;       BaseMemoryLibRepStr
+;       BaseMemoryLibMmx
+;       BaseMemoryLibSse2
+;       BaseMemoryLibOptDxe
+;       BaseMemoryLibOptPei
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; CONST VOID *
+; EFIAPI
+; InternalMemScanMem8 (
+;   IN      CONST VOID                *Buffer,
+;   IN      UINTN                     Length,
+;   IN      UINT8                     Value
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemScanMem8)
+ASM_PFX(InternalMemScanMem8):
+    push    rdi
+    mov     rdi, rcx
+    mov     rcx, rdx
+    mov     rax, r8
+    repne   scasb
+    lea     rax, [rdi - 1]
+    cmovnz  rax, rcx                    ; set rax to 0 if not found
+    pop     rdi
+    ret
+
-- 
cgit 1.2.3-korg