diff options
| author | Guo Mang <mang.guo@intel.com> | 2017-04-27 11:08:17 +0800 |
|---|---|---|
| committer | Guo Mang <mang.guo@intel.com> | 2017-04-27 11:08:17 +0800 |
| commit | b0724f89e3b05de1d6492e79ec89f6d467cb14f0 (patch) | |
| tree | e4a9eff6dc255621c2f0a08d61d32bf95087a7a9 /MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm | |
| parent | c23f114d3cfbb29b8734b87213d1ec0de404197b (diff) | |
| download | edk2-platforms-b0724f89e3b05de1d6492e79ec89f6d467cb14f0.tar.xz | |
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm b/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm deleted file mode 100644 index 7188199bfb..0000000000 --- a/MdePkg/Library/BaseLib/Ia32/DivU64x64Remainder.nasm +++ /dev/null @@ -1,94 +0,0 @@ -;------------------------------------------------------------------------------
-;
-; Copyright (c) 2006, 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:
-;
-; DivU64x64Remainder.nasm
-;
-; Abstract:
-;
-; Calculate the quotient of a 64-bit integer by a 64-bit integer and returns
-; both the quotient and the remainder
-;
-;------------------------------------------------------------------------------
-
- SECTION .text
-
-extern ASM_PFX(InternalMathDivRemU64x32)
-
-;------------------------------------------------------------------------------
-; UINT64
-; EFIAPI
-; InternalMathDivRemU64x64 (
-; IN UINT64 Dividend,
-; IN UINT64 Divisor,
-; OUT UINT64 *Remainder OPTIONAL
-; );
-;------------------------------------------------------------------------------
-global ASM_PFX(InternalMathDivRemU64x64)
-ASM_PFX(InternalMathDivRemU64x64):
- mov ecx, [esp + 16] ; ecx <- divisor[32..63]
- test ecx, ecx
- jnz _@DivRemU64x64 ; call _@DivRemU64x64 if Divisor > 2^32
- mov ecx, [esp + 20]
- jecxz .0
- and dword [ecx + 4], 0 ; zero high dword of remainder
- mov [esp + 16], ecx ; set up stack frame to match DivRemU64x32
-.0:
- jmp ASM_PFX(InternalMathDivRemU64x32)
-
-_@DivRemU64x64:
- push ebx
- push esi
- push edi
- mov edx, dword [esp + 20]
- mov eax, dword [esp + 16] ; edx:eax <- dividend
- mov edi, edx
- mov esi, eax ; edi:esi <- dividend
- mov ebx, dword [esp + 24] ; ecx:ebx <- divisor
-.1:
- shr edx, 1
- rcr eax, 1
- shrd ebx, ecx, 1
- shr ecx, 1
- jnz .1
- div ebx
- mov ebx, eax ; ebx <- quotient
- mov ecx, [esp + 28] ; ecx <- high dword of divisor
- mul dword [esp + 24] ; edx:eax <- quotient * divisor[0..31]
- imul ecx, ebx ; ecx <- quotient * divisor[32..63]
- add edx, ecx ; edx <- (quotient * divisor)[32..63]
- mov ecx, dword [esp + 32] ; ecx <- addr for Remainder
- jc @TooLarge ; product > 2^64
- cmp edi, edx ; compare high 32 bits
- ja @Correct
- jb @TooLarge ; product > dividend
- cmp esi, eax
- jae @Correct ; product <= dividend
-@TooLarge:
- dec ebx ; adjust quotient by -1
- jecxz @Return ; return if Remainder == NULL
- sub eax, dword [esp + 24]
- sbb edx, dword [esp + 28] ; edx:eax <- (quotient - 1) * divisor
-@Correct:
- jecxz @Return
- sub esi, eax
- sbb edi, edx ; edi:esi <- remainder
- mov [ecx], esi
- mov [ecx + 4], edi
-@Return:
- mov eax, ebx ; eax <- quotient
- xor edx, edx ; quotient is 32 bits long
- pop edi
- pop esi
- pop ebx
- ret
-
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