MdePkg BaseMemoryLibOptPei: Convert X64/SetMem.asm to NASM

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibOptPei / X64 / SetMem.nasm

diff --git a/MdePkg/Library/BaseMemoryLibOptPei/X64/SetMem.nasm b/MdePkg/Library/BaseMemoryLibOptPei/X64/SetMem.nasm
new file mode 100644 (file)
index 0000000..059f2c2
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibOptPei/X64/SetMem.nasm
@@ -0,0 +1,47 @@
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
+; This program and the accompanying materials\r
+; are licensed and made available under the terms and conditions of the BSD License\r
+; which accompanies this distribution.  The full text of the license may be found at\r
+; http://opensource.org/licenses/bsd-license.php.\r
+;\r
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+;\r
+; Module Name:\r
+;\r
+;   SetMem.Asm\r
+;\r
+; Abstract:\r
+;\r
+;   SetMem function\r
+;\r
+; Notes:\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+    DEFAULT REL\r
+    SECTION .text\r
+\r
+;------------------------------------------------------------------------------\r
+;  VOID *\r
+;  EFIAPI\r
+;  InternalMemSetMem (\r
+;    IN VOID   *Buffer,\r
+;    IN UINTN  Count,\r
+;    IN UINT8  Value\r
+;    )\r
+;------------------------------------------------------------------------------\r
+global ASM_PFX(InternalMemSetMem)\r
+ASM_PFX(InternalMemSetMem):\r
+    push    rdi\r
+    push    rcx         ; push Buffer\r
+    mov     rax, r8     ; rax = Value\r
+    mov     rdi, rcx    ; rdi = Buffer\r
+    mov     rcx, rdx    ; rcx = Count\r
+    rep     stosb\r
+    pop     rax         ; rax = Buffer\r
+    pop     rdi\r
+    ret\r
+\r