Import some basic libraries instances for Mde Packages.

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibSse2 / Ia32 / SetMem.S

diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.S b/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.S
new file mode 100644 (file)
index 0000000..aa6f59f
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem.S
@@ -0,0 +1,81 @@
+//\r
+// Include common header file for this module.\r
+//\r
+#include "CommonHeader.h"\r
+\r
+#------------------------------------------------------------------------------\r
+#\r
+# Copyright (c) 2006, Intel Corporation\r
+# All rights reserved. This program and the accompanying materials\r
+# are licensed and made available under the terms and conditions of the BSD License\r
+# which accompanies this distribution.  The full text of the license may be found at\r
+# http://opensource.org/licenses/bsd-license.php\r
+#\r
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+#\r
+# Module Name:\r
+#\r
+#   SetMem.asm\r
+#\r
+# Abstract:\r
+#\r
+#   SetMem function\r
+#\r
+# Notes:\r
+#\r
+#------------------------------------------------------------------------------\r
+\r
+    .686:\r
+    #.MODEL flat,C\r
+    .xmm:\r
+    .code:\r
+\r
+#------------------------------------------------------------------------------\r
+#  VOID *\r
+#  _mem_SetMem (\r
+#    IN VOID   *Buffer,\r
+#    IN UINTN  Count,\r
+#    IN UINT8  Value\r
+#    );\r
+#------------------------------------------------------------------------------\r
+.globl _InternalMemSetMem\r
+_InternalMemSetMem:\r
+    push    %edi\r
+    movl    12(%esp), %edx              # edx <- Count\r
+    movl    8(%esp), %edi               # edi <- Buffer\r
+    movb    16(%esp), %al               # al <- Value\r
+    xorl    %ecx, %ecx\r
+    subl    %edi, %ecx\r
+    andl    $15, %ecx                   # ecx + edi aligns on 16-byte boundary\r
+    jz      L0\r
+    cmpl    %edx, %ecx\r
+    cmova   %edx, %ecx\r
+    subl    %ecx, %edx\r
+    rep\r
+    stosb\r
+L0:\r
+    movl    %edx, %ecx\r
+    andl    $15, %edx\r
+    shrl    $4, %ecx                    # ecx <- # of DQwords to set\r
+    jz      L_SetBytes\r
+    movb    %al, %ah                    # ax <- Value | (Value << 8)\r
+    addl    $-16, %esp\r
+    movdqu  %xmm0, (%esp)\r
+    movd    %eax, %xmm0\r
+    pshuflw $0, %xmm0, %xmm0\r
+    movlhps %xmm0, %xmm0\r
+L1:\r
+    movntdq %xmm0, (%edi)\r
+    addl    $16, %edi\r
+    loop   L1\r
+    mfence\r
+    movdqu  (%esp), %xmm0\r
+    addl    $16, %esp                   # stack cleanup\r
+L_SetBytes:\r
+    movl    %edx, %ecx\r
+    rep\r
+    stosb\r
+    movl    8(%esp), %eax               # eax <- Buffer as return value\r
+    pop     %edi\r
+    ret\r