#------------------------------------------------------------------------------

#

# Copyright (c) 2009 - 2011, 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:

#

# MathLShiftS64.S

#

# Abstract:

#

# 64-bit Math Worker Function.

# Shifts a 64-bit signed value left by a certain number of bits.

#

#------------------------------------------------------------------------------

.686:

.code:

ASM_GLOBAL ASM_PFX(__ashldi3)

#------------------------------------------------------------------------------

#

# void __cdecl __ashldi3 (void)

#

#------------------------------------------------------------------------------

ASM_PFX(__ashldi3):

#

# Handle shifting of 64 or more bits (return 0)

#

cmpb $64, %cl

jae ReturnZero

#

# Handle shifting of between 0 and 31 bits

#

cmpb $32, %cl

jae More32

shld %cl, %eax, %edx

shl %cl, %eax

ret

#

# Handle shifting of between 32 and 63 bits

#

More32:

movl %eax, %edx

xor %eax, %eax

and $31, %cl

shl %cl, %edx

ret

ReturnZero:

xor %eax, %eax

xor %edx, %edx

ret