1 files changed, 89 insertions, 0 deletions
diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.S b/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.S
new file mode 100644
index 0000000000..7c1f971644
--- /dev/null
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/Ia32/MathReminderU64x64.S
@@ -0,0 +1,89 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+# 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:
+#
+#   MathReminderU64x64.S
+#
+# Abstract:
+#
+#   64-bit Math Worker Function.
+#   Divides a 64-bit unsigned value by another 64-bit unsigned value and returns
+#   the 64-bit unsigned remainder
+#
+#------------------------------------------------------------------------------
+
+    .686:
+    .code:
+
+ASM_GLOBAL ASM_PFX(__umoddi3), ASM_PFX(DivU64x64Remainder)
+
+#------------------------------------------------------------------------------
+#
+# void __cdecl __umoddi3 (void)
+#
+#------------------------------------------------------------------------------
+ASM_PFX(__umoddi3):
+    # Original local stack when calling __umoddi3
+    #               -----------------
+    #               |               |
+    #               |---------------|
+    #               |               |
+    #               |--  Divisor  --|
+    #               |               |
+    #               |---------------|
+    #               |               |
+    #               |--  Dividend --|
+    #               |               |
+    #               |---------------|
+    #               |  ReturnAddr** |
+    #       ESP---->|---------------|
+    #
+
+    #
+    # Set up the local stack for Reminder pointer
+    #
+    sub     $8, %esp
+    push    %esp
+
+    #
+    # Set up the local stack for Divisor parameter
+    #
+    movl    28(%esp), %eax
+    push    %eax
+    movl    28(%esp), %eax
+    push    %eax
+
+    #
+    # Set up the local stack for Dividend parameter
+    #
+    movl    28(%esp), %eax
+    push    %eax
+    movl    28(%esp), %eax
+    push    %eax
+
+    #
+    # Call native DivU64x64Remainder of BaseLib
+    #
+    jmp     ASM_PFX(DivU64x64Remainder)
+
+    #
+    # Put the Reminder in EDX:EAX as return value
+    #
+    movl    20(%esp), %eax
+    movl    24(%esp), %edx
+
+    #
+    # Adjust stack
+    #
+    add     $28, %esp
+    
+    ret     $16