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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2018, 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
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