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| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-22 03:21:45 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-22 03:21:45 +0000 |
| commit | e1f414b6a7d8a0424e0e01f655b09a4612b4d0e8 (patch) | |
| tree | 32d74f9463f0b5c6a28ff6aff73709219d437604 /MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S | |
| parent | e053747a04ad7b8d71c7593b93e1575ba0057a91 (diff) | |
| download | edk2-platforms-e1f414b6a7d8a0424e0e01f655b09a4612b4d0e8.tar.xz | |
Import some basic libraries instances for Mde Packages.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2704 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S new file mode 100644 index 0000000000..36008bf567 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.S @@ -0,0 +1,94 @@ +//
+// Include common header file for this module.
+//
+#include "CommonHeader.h"
+
+#------------------------------------------------------------------------------
+#
+# 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:
+#
+# DivU64x64Remainder.asm
+#
+# Abstract:
+#
+# Calculate the quotient of a 64-bit integer by a 64-bit integer and returns
+# both the quotient and the remainder
+#
+#------------------------------------------------------------------------------
+
+.globl ASM_PFX(InternalMathDivRemU64x32), ASM_PFX(InternalMathDivRemU64x64)
+
+#------------------------------------------------------------------------------
+# UINT64
+# EFIAPI
+# InternalMathDivRemU64x64 (
+# IN UINT64 Dividend,
+# IN UINT64 Divisor,
+# OUT UINT64 *Remainder OPTIONAL
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalMathDivRemU64x64):
+ movl 16(%esp), %ecx
+ testl %ecx, %ecx
+ jnz Hard
+ movl 20(%esp), %ecx
+ jecxz L1
+ and $0, 4(%ecx)
+ movl %ecx, 16(%esp)
+L1:
+ jmp ASM_PFX(InternalMathDivRemU64x32)
+Hard:
+ push %ebx
+ push %esi
+ push %edi
+ mov 20(%esp), %edx
+ mov 16(%esp), %eax
+ movl %edx, %edi
+ movl %eax, %esi
+ mov 24(%esp), %ebx
+L2:
+ shrl %edx
+ rcrl $1, %eax
+ shrdl $1, %ecx, %ebx
+ shrl %ecx
+ jnz L2
+ divl %ebx
+ movl %eax, %ebx
+ movl 28(%esp), %ecx
+ mull 24(%esp)
+ imull %ebx, %ecx
+ addl %ecx, %edx
+ mov 32(%esp), %ecx
+ jc TooLarge
+ cmpl %edx, %edi
+ ja Correct
+ jb TooLarge
+ cmpl %eax, %esi
+ jae Correct
+TooLarge:
+ decl %ebx
+ jecxz Return
+ sub 24(%esp), %eax
+ sbb 28(%esp), %edx
+Correct:
+ jecxz Return
+ subl %eax, %esi
+ sbbl %edx, %edi
+ movl %esi, (%ecx)
+ movl %edi, 4(%ecx)
+Return:
+ movl %ebx, %eax
+ xorl %edx, %edx
+ pop %edi
+ pop %esi
+ pop %ebx
+ ret
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