1 | ; $Id: RTUInt128MulByU64.asm 76553 2019-01-01 01:45:53Z vboxsync $
|
---|
2 | ;; @file
|
---|
3 | ; IPRT - RTUInt128MulByU64 - AMD64 implementation.
|
---|
4 | ;
|
---|
5 |
|
---|
6 | ;
|
---|
7 | ; Copyright (C) 2006-2019 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 |
|
---|