[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LShiftU64.s

#------------------------------------------------------------------------------
#
# Copyright (c) 2006, 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: 

.global _InternalMathLShiftU64
_InternalMathLShiftU64:
    movb    12(%esp), %cl
    xorl    %eax, %eax
    movl    4(%esp), %edx
    testb   $32, %cl
    cmovz   %edx, %eax
    cmovz   0x8(%esp), %edx
    shld    %cl,%eax,%edx
    shl     %cl, %eax
    ret
Commit	Line	Data
7962c48c	1	#------------------------------------------------------------------------------
	2	#
	3	# Copyright (c) 2006, Intel Corporation
	4	# All rights reserved. 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.asm
	15	#
	16	# Abstract:
	17	#
	18	# 64-bit left shift function for IA-32
	19	#
	20	#------------------------------------------------------------------------------
	21
	22	.686:
	23	#.MODEL flat,C
	24	.code:
	25
	26	.global _InternalMathLShiftU64
	27	_InternalMathLShiftU64:
	28	movb 12(%esp), %cl
	29	xorl %eax, %eax
	30	movl 4(%esp), %edx
	31	testb $32, %cl
	32	cmovz %edx, %eax
	33	cmovz 0x8(%esp), %edx
	34	shld %cl,%eax,%edx
	35	shl %cl, %eax
	36	ret