1#------------------------------------------------------------------------------ 2# 3# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> 4# This program and the accompanying materials 5# are licensed and made available under the terms and conditions of the BSD License 6# which accompanies this distribution. The full text of the license may be found at 7# http://opensource.org/licenses/bsd-license.php. 8# 9# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11# 12# Module Name: 13# 14# LShiftU64.S 15# 16# Abstract: 17# 18# 64-bit left shift function for IA-32 19# 20#------------------------------------------------------------------------------ 21 22ASM_GLOBAL ASM_PFX(InternalMathLShiftU64) 23 24#------------------------------------------------------------------------------ 25# UINT64 26# EFIAPI 27# InternalMathLShiftU64 ( 28# IN UINT64 Operand, 29# IN UINTN Count 30# ); 31#------------------------------------------------------------------------------ 32ASM_PFX(InternalMathLShiftU64): 33 movb 12(%esp), %cl 34 xorl %eax, %eax 35 movl 4(%esp), %edx 36 testb $32, %cl # Count >= 32? 37 jnz L0 38 movl %edx, %eax 39 movl 0x8(%esp), %edx 40L0: 41 shld %cl, %eax, %edx 42 shl %cl, %eax 43 ret 44