--- /dev/null
+;------------------------------------------------------------------------------\r
+;\r
+; Copyright (c) 2006, 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.nasm\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
+; OUT VOID *Buffer,\r
+; IN UINTN Length,\r
+; IN UINT8 Value\r
+; );\r
+;------------------------------------------------------------------------------\r
+global ASM_PFX(InternalMemSetMem)\r
+ASM_PFX(InternalMemSetMem):\r
+ push rdi\r
+ mov rax, r8\r
+ mov ah, al\r
+ DB 0x48, 0xf, 0x6e, 0xc0 ; movd mm0, rax\r
+ mov r8, rcx\r
+ mov rdi, r8 ; rdi <- Buffer\r
+ mov rcx, rdx\r
+ and edx, 7\r
+ shr rcx, 3\r
+ jz @SetBytes\r
+ DB 0xf, 0x70, 0xC0, 0x0 ; pshufw mm0, mm0, 0h\r
+.0:\r
+ DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0\r
+ add rdi, 8\r
+ loop .0\r
+ mfence\r
+@SetBytes:\r
+ mov ecx, edx\r
+ rep stosb\r
+ mov rax, r8\r
+ pop rdi\r
+ ret\r
+\r