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#------------------------------------------------------------------------------
#
# Copyright (c) 2009 - 2010, 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
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