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|
; $Id: RTUInt128MulByU64.asm $
;; @file
; IPRT - RTUInt128MulByU64 - AMD64 implementation.
;
;
; Copyright (C) 2006-2019 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
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