Port to GNU assembly.

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibMmx / ia32 / SetMem.s

diff --git a/MdePkg/Library/BaseMemoryLibMmx/ia32/SetMem.s b/MdePkg/Library/BaseMemoryLibMmx/ia32/SetMem.s
new file mode 100644 (file)
index 0000000..8a893f8
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibMmx/ia32/SetMem.s
@@ -0,0 +1,67 @@
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+#------------------------------------------------------------------------------
+
+    .686: 
+    #.MODEL flat,C
+    .xmm: 
+    .code: 
+
+#------------------------------------------------------------------------------
+#  VOID *
+#  _mem_SetMem (
+#    IN VOID   *Buffer,
+#    IN UINTN  Count,
+#    IN UINT8  Value
+#    )
+#------------------------------------------------------------------------------
+.global _InternalMemSetMem
+_InternalMemSetMem:
+    push    %edi
+    movl    12(%esp), %ecx              # ecx <- Count
+    movl    8(%esp), %edi               # edi <- Buffer
+    movl    %ecx, %edx
+    shrl    $3, %ecx                    # # of Qwords to set
+    movb    16(%esp), %al               # al <- Value
+    jz      @SetBytes
+    movb    %al, %ah                    # ax <- Value | (Value << 8)
+    pushl   %ecx
+    pushl   %ecx
+    movq    %mm0, (%esp)                # save mm0
+    movd    %eax, %mm0
+    pshufw  $0x0,%mm0,%mm0
+L0: 
+    movntq  %mm0, (%edi)
+    addl    $8, %edi
+    loop    L0
+    mfence
+    movq    (%esp), %mm0                # restore mm0
+    popl    %ecx                        # stack cleanup
+    popl    %ecx
+@SetBytes: 
+    andl    $7, %edx
+    movl    %edx, %ecx
+    rep
+    stosb
+    movl    8(%esp), %eax               # eax <- Buffer as return value
+    pop     %edi
+    ret