Ported to GNU assembly.

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibRepStr / Ia32 / ScanMem64.s

diff --git a/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ScanMem64.s b/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ScanMem64.s
new file mode 100644 (file)
index 0000000..bfb4189
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibRepStr/Ia32/ScanMem64.s
@@ -0,0 +1,52 @@
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+#   ScanMem64.Asm
+#
+# Abstract:
+#
+#   ScanMem64 function
+#
+# Notes:
+#
+#   The following BaseMemoryLib instances share the same version of this file:
+#
+#       BaseMemoryLibRepStr
+#       BaseMemoryLibMmx
+#       BaseMemoryLibSse2
+#
+#------------------------------------------------------------------------------
+
+    .686: 
+    .code: 
+
+InternalMemScanMem64:
+    push    %edi
+    movl    12(%esp),%ecx
+    movl    16(%esp),%eax
+    movl    20(%esp),%edx
+    movl    8(%esp),%edi
+L0:
+    cmpl    (%edi),%eax
+    leal    8(%edi),%edi
+    loopne  L0
+    jne     L1
+    cmpl    -4(%edi),%edx
+    jecxz   L1
+    jne     L0
+L1:
+    leal    -8(%edi),%eax
+    cmovne  %ecx, %eax
+    pop     %edi
+    ret
+