1 files changed, 49 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.nasm b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.nasm
new file mode 100644
index 00000000..96ee9505
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.nasm
@@ -0,0 +1,49 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+;   SetMem32.nasm
+;
+; Abstract:
+;
+;   SetMem32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+;  VOID *
+;  EFIAPI
+;  InternalMemSetMem32 (
+;    IN VOID   *Buffer,
+;    IN UINTN  Count,
+;    IN UINT32 Value
+;    );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemSetMem32)
+ASM_PFX(InternalMemSetMem32):
+    mov     eax, [esp + 4]              ; eax <- Buffer as return value
+    mov     ecx, [esp + 8]              ; ecx <- Count
+    movd    mm0, dword [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
+.0:
+    movq    qword [edx], mm0
+    lea     edx, [edx + 8]              ; use "lea" to avoid change in flags
+    loop    .0
+@SetDwords:
+    jnc     .1
+    movd    dword [edx], mm0
+.1:
+    ret
+