;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006 - 2015, 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: | |
; | |
; LShiftU64.nasm | |
; | |
; Abstract: | |
; | |
; 64-bit left shift function for IA-32 | |
; | |
;------------------------------------------------------------------------------ | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; UINT64 | |
; EFIAPI | |
; InternalMathLShiftU64 ( | |
; IN UINT64 Operand, | |
; IN UINTN Count | |
; ); | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(InternalMathLShiftU64) | |
ASM_PFX(InternalMathLShiftU64): | |
mov cl, [esp + 12] | |
xor eax, eax | |
mov edx, [esp + 4] | |
test cl, 32 ; Count >= 32? | |
jnz .0 | |
mov eax, edx | |
mov edx, [esp + 8] | |
.0: | |
shld edx, eax, cl | |
shl eax, cl | |
ret | |