diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.asm')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.asm | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.asm new file mode 100644 index 0000000..4b71204 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LShiftU64.asm @@ -0,0 +1,44 @@ +; Copyright (c) 2004, 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: +; +; LShiftU64.asm +; +; Abstract: +; +; 64-bit left shift function for IA-32 +; +;------------------------------------------------------------------------------ + + .686 + .model flat,C + .code + +;------------------------------------------------------------------------------ +; UINT64 +; EFIAPI +; InternalMathLShiftU64 ( +; IN UINT64 Operand, +; IN UINTN Count +; ); +;------------------------------------------------------------------------------ +InternalMathLShiftU64 PROC + mov cl, [esp + 12] + xor eax, eax + mov edx, [esp + 4] + test cl, 32 ; Count >= 32? + cmovz eax, edx + cmovz edx, [esp + 8] + shld edx, eax, cl + shl eax, cl + ret +InternalMathLShiftU64 ENDP + + END |