| 1 | ; $Id: RTUInt128MulByU64.asm 69219 2017-10-24 15:01:30Z vboxsync $
|
|---|
| 2 | ;; @file
|
|---|
| 3 | ; IPRT - RTUInt128MulByU64 - AMD64 implementation.
|
|---|
| 4 | ;
|
|---|
| 5 |
|
|---|
| 6 | ;
|
|---|
| 7 | ; Copyright (C) 2006-2017 Oracle Corporation
|
|---|
| 8 | ;
|
|---|
| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | ; available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | ; General Public License (GPL) as published by the Free Software
|
|---|
| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | ;
|
|---|
| 17 | ; The contents of this file may alternatively be used under the terms
|
|---|
| 18 | ; of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | ; CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | ;
|
|---|
| 23 | ; You may elect to license modified versions of this file under the
|
|---|
| 24 | ; terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | ;
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | %define RT_ASM_WITH_SEH64
|
|---|
| 29 | %include "iprt/asmdefs.mac"
|
|---|
| 30 | %include "internal/bignum.mac"
|
|---|
| 31 |
|
|---|
| 32 |
|
|---|
| 33 | BEGINCODE
|
|---|
| 34 |
|
|---|
| 35 | ;;
|
|---|
| 36 | ; Multiplies a 128-bit number with a 64-bit one.
|
|---|
| 37 | ;
|
|---|
| 38 | ; @returns puResult.
|
|---|
| 39 | ; @param puResult x86:[ebp + 8] gcc:rdi msc:rcx
|
|---|
| 40 | ; @param puValue1 x86:[ebp + 12] gcc:rsi msc:rdx
|
|---|
| 41 | ; @param uValue2 x86:[ebp + 16] gcc:rdx msc:r8
|
|---|
| 42 | ;
|
|---|
| 43 | BEGINPROC_EXPORTED RTUInt128MulByU64
|
|---|
| 44 | ; SEH64_SET_FRAME_xSP 0
|
|---|
| 45 | SEH64_END_PROLOGUE
|
|---|
| 46 |
|
|---|
| 47 | %ifdef RT_ARCH_AMD64
|
|---|
| 48 | %ifdef ASM_CALL64_GCC
|
|---|
| 49 | %define puResult rdi
|
|---|
| 50 | %define puValue1 rsi
|
|---|
| 51 | %define uValue2 r8
|
|---|
| 52 | mov r8, rdx
|
|---|
| 53 | %else
|
|---|
| 54 | %define puResult rcx
|
|---|
| 55 | %define puValue1 r9
|
|---|
| 56 | %define uValue2 r8
|
|---|
| 57 | mov r9, rdx
|
|---|
| 58 | %endif
|
|---|
| 59 |
|
|---|
| 60 | ; puValue1->s.Lo * uValue2
|
|---|
| 61 | mov rax, [puValue1]
|
|---|
| 62 | mul uValue2
|
|---|
| 63 | mov [puResult], rax
|
|---|
| 64 | mov r11, rdx ; Store the lower half of the result.
|
|---|
| 65 |
|
|---|
| 66 | ; puValue1->s.Hi * uValue2
|
|---|
| 67 | mov rax, [puValue1 + 8]
|
|---|
| 68 | mul uValue2
|
|---|
| 69 | add r11, rax ; Calc the second half of the result.
|
|---|
| 70 | mov [puResult + 8], r11 ; Store the high half of the result.
|
|---|
| 71 |
|
|---|
| 72 | mov rax, puResult
|
|---|
| 73 |
|
|---|
| 74 | ;%elifdef RT_ARCH_X86
|
|---|
| 75 | %else
|
|---|
| 76 | %error "unsupported arch"
|
|---|
| 77 | %endif
|
|---|
| 78 |
|
|---|
| 79 | ret
|
|---|
| 80 | ENDPROC RTUInt128MulByU64
|
|---|
| 81 |
|
|---|
