Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLibMmx / Ia32 / SetMem.S

diff --git a/OldMdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.S b/OldMdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.S
new file mode 100644 (file)
index 0000000..96fb48e
--- /dev/null
+++ b/OldMdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.S
@@ -0,0 +1,66 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. 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:
+#
+#   SetMem.asm
+#
+# Abstract:
+#
+#   SetMem function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+.globl _InternalMemSetMem
+
+#------------------------------------------------------------------------------
+#  VOID *
+#  InternalMemSetMem (
+#    IN VOID   *Buffer,
+#    IN UINTN  Count,
+#    IN UINT8  Value
+#    )
+#------------------------------------------------------------------------------
+_InternalMemSetMem:
+    push    %edi
+    movb    16(%esp), %al
+    movb    %al, %ah
+    shrdl   $16, %eax, %edx
+    shldl   $16, %edx, %eax
+    movl    12(%esp), %ecx              # ecx <- Count
+    movl    8(%esp), %edi               # edi <- Buffer
+    movl    %ecx, %edx
+    andl    $7, %edx
+    shrl    $3, %ecx                    # # of Qwords to set
+    jz      L1
+    addl    $0x-10, %esp
+    movq    %mm0, (%esp)                # save mm0
+    movq    %mm1, 8(%esp)               # save mm1
+    movd    %eax, %mm0
+    movd    %eax, %mm1
+    psllq   $32, %mm0
+    por     %mm1, %mm0                  # fill mm0 with 8 Value's
+L0:
+    movq    %mm0, (%edi)
+    addl    $8, %edi
+    loopl   L0
+    movq    (%esp), %mm0                # restore mm0
+    movq    8(%esp), %mm1               # restore mm1
+    addl    $0x10, %esp                 # stack cleanup
+L1:
+    movl    %edx, %ecx
+    rep
+    stosb
+    movl    8(%esp), %eax               # eax <- Buffer as return value
+    pop     %edi
+    ret