; $Id$

;; @file

; IPRT - RTUInt128MulByU64 - AMD64 implementation.

;

;

; Copyright (C) 2006-2014 Oracle Corporation

;

; This file is part of VirtualBox Open Source Edition (OSE), as

; available from http://www.virtualbox.org. This file is free software;

; you can redistribute it and/or modify it under the terms of the GNU

; General Public License (GPL) as published by the Free Software

; Foundation, in version 2 as it comes in the "COPYING" file of the

; VirtualBox OSE distribution. VirtualBox OSE is distributed in the

; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

;

; The contents of this file may alternatively be used under the terms

; of the Common Development and Distribution License Version 1.0

; (CDDL) only, as it comes in the "COPYING.CDDL" file of the

; VirtualBox OSE distribution, in which case the provisions of the

; CDDL are applicable instead of those of the GPL.

;

; You may elect to license modified versions of this file under the

; terms and conditions of either the GPL or the CDDL or both.

;

%define RT_ASM_WITH_SEH64

%include "iprt/asmdefs.mac"

%include "internal/bignum.mac"

BEGINCODE

;;

; Multiplies a 128-bit number with a 64-bit one.

;

; @returns puResult.

; @param puResult x86:[ebp + 8] gcc:rdi msc:rcx

; @param puValue1 x86:[ebp + 12] gcc:rsi msc:rdx

; @param uValue2 x86:[ebp + 16] gcc:rdx msc:r8

;

BEGINPROC_EXPORTED RTUInt128MulByU64

; SEH64_SET_FRAME_xSP 0

SEH64_END_PROLOGUE

%ifdef RT_ARCH_AMD64

%ifdef ASM_CALL64_GCC

%define puResult rdi

%define puValue1 rsi

%define uValue2 r8

mov r8, rdx

%else

%define puResult rcx

%define puValue1 r9

%define uValue2 r8

mov r9, rdx

%endif

; puValue1->s.Lo * uValue2

mov rax, [puValue1]

mul uValue2

mov [puResult], rax

mov r11, rdx ; Store the lower half of the result.

; puValue1->s.Hi * uValue2

mov rax, [puValue1 + 8]

mul uValue2

add r11, rax ; Calc the second half of the result.

mov [puResult + 8], r11 ; Store the high half of the result.

mov rax, puResult

;%elifdef RT_ARCH_X86

%else

%error "unsupported arch"

%endif

ret

ENDPROC RTUInt128MulByU64