[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / SwapBytes64.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, 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:
#
#   CpuId.S
#
# Abstract:
#
#   AsmCpuid function
#
# Notes:
#
#------------------------------------------------------------------------------


#------------------------------------------------------------------------------
# UINT64
# EFIAPI
# InternalMathSwapBytes64 (
#   IN      UINT64                    Operand
#   );
#------------------------------------------------------------------------------
.globl ASM_PFX(InternalMathSwapBytes64)
ASM_PFX(InternalMathSwapBytes64):
    movl    8(%esp), %eax               # eax <- upper 32 bits
    movl    4(%esp), %edx               # edx <- lower 32 bits
    bswapl  %eax
    bswapl  %edx
    ret
Commit	Line	Data
f1baef62	1	#------------------------------------------------------------------------------
f1baef62	2	#
1f86b07d	3	# Copyright (c) 2006 - 2008, Intel Corporation
f1baef62	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	#
1f86b07d	14	# CpuId.S
f1baef62	15	#
	16	# Abstract:
	17	#
	18	# AsmCpuid function
	19	#
	20	# Notes:
	21	#
	22	#------------------------------------------------------------------------------
	23
	24
	25	#------------------------------------------------------------------------------
	26	# UINT64
	27	# EFIAPI
	28	# InternalMathSwapBytes64 (
	29	# IN UINT64 Operand
	30	# );
	31	#------------------------------------------------------------------------------
	32	.globl ASM_PFX(InternalMathSwapBytes64)
	33	ASM_PFX(InternalMathSwapBytes64):
57246fe0	34	movl 8(%esp), %eax # eax <- upper 32 bits
57246fe0	35	movl 4(%esp), %edx # edx <- lower 32 bits
f1baef62	36	bswapl %eax
	37	bswapl %edx
	38	ret