diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm new file mode 100644 index 0000000000000..6c58b474b9d9b --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm @@ -0,0 +1,59 @@ +;------------------------------------------------------------------------------ +; +; 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: +; +; SetMem32.asm +; +; Abstract: +; +; SetMem32 function +; +; Notes: +; +;------------------------------------------------------------------------------ + + .686 + .model flat,C + .mmx + .code + +;------------------------------------------------------------------------------ +; VOID * +; EFIAPI +; InternalMemSetMem32 ( +; IN VOID *Buffer, +; IN UINTN Count, +; IN UINT32 Value +; ); +;------------------------------------------------------------------------------ +InternalMemSetMem32 PROC + mov eax, [esp + 4] ; eax <- Buffer as return value + mov ecx, [esp + 8] ; ecx <- Count + movd mm0, dword ptr [esp + 12] ; mm0 <- Value + shr ecx, 1 ; ecx <- number of qwords to set + mov edx, eax ; edx <- Buffer + jz @SetDwords + movq mm1, mm0 + psllq mm1, 32 + por mm0, mm1 +@@: + movq qword ptr [edx], mm0 + lea edx, [edx + 8] ; use "lea" to avoid change in flags + loop @B +@SetDwords: + jnc @F + movd dword ptr [edx], mm0 +@@: + ret +InternalMemSetMem32 ENDP + + END |