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

#

# Copyright (c) 2006 - 2008, 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:

#

# MultU64x64.S

#

# Abstract:

#

# Calculate the product of a 64-bit integer and another 64-bit integer

#

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

ASM_GLOBAL ASM_PFX(InternalMathMultU64x64)

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

# UINT64

# EFIAPI

# InternalMathMultU64x64 (

# IN UINT64 Multiplicand,

# IN UINT64 Multiplier

# );

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

ASM_PFX(InternalMathMultU64x64):

push %ebx

movl 8(%esp), %ebx # ebx <- M1[0..31]

movl 16(%esp), %edx # edx <- M2[0..31]

movl %ebx, %ecx

movl %edx, %eax

imull 20(%esp), %ebx # ebx <- M1[0..31] * M2[32..63]

imull 12(%esp), %edx # edx <- M1[32..63] * M2[0..31]

addl %edx, %ebx # carries are abandoned

mull %ecx # edx:eax <- M1[0..31] * M2[0..31]

addl %ebx, %edx # carries are abandoned

pop %ebx

ret