1 files changed, 62 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem32.nasm b/roms/edk2/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem32.nasm
new file mode 100644
index 000000000..928e08688
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseMemoryLibSse2/X64/SetMem32.nasm
@@ -0,0 +1,62 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   SetMem32.nasm
+;
+; Abstract:
+;
+;   SetMem32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  InternalMemSetMem32 (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT8  Value
+;    )
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem32)
+ASM_PFX(InternalMemSetMem32):
+    push    rdi
+    mov     rdi, rcx
+    mov     r9, rdi
+    xor     rcx, rcx
+    sub     rcx, rdi
+    and     rcx, 15
+    mov     rax, r8
+    jz      .0
+    shr     rcx, 2
+    cmp     rcx, rdx
+    cmova   rcx, rdx
+    sub     rdx, rcx
+    rep     stosd
+.0:
+    mov     rcx, rdx
+    and     edx, 3
+    shr     rcx, 2
+    jz      @SetDwords
+    movd    xmm0, eax
+    pshufd  xmm0, xmm0, 0
+.1:
+    movntdq [rdi], xmm0
+    add     rdi, 16
+    loop    .1
+    mfence
+@SetDwords:
+    mov     ecx, edx
+    rep     stosd
+    mov     rax, r9
+    pop     rdi
+    ret
+