blob: 3eade8dfd36cdd44e9919810d39cf7eb54c5bbd4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
; $Id: remainderl.asm $
;; @file
; IPRT - No-CRT remainderl - AMD64 & X86.
;
;
; Copyright (C) 2006-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox 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.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
%define RT_ASM_WITH_SEH64
%include "iprt/asmdefs.mac"
%include "iprt/x86.mac"
BEGINCODE
;;
; See SUS.
; @returns st(0)
; @param lrd1 [rbp + 10h]
; @param lrd2 [rbp + 20h]
RT_NOCRT_BEGINPROC remainderl
push xBP
SEH64_PUSH_xBP
mov xBP, xSP
SEH64_SET_FRAME_xBP 0
SEH64_END_PROLOGUE
;
; Load the dividend into st0 and divisor into st1.
;
fld tword [xBP + 2*xCB + RTLRD_CB]
fld tword [xBP + 2*xCB]
;
; The fprem1 only does between 32 and 64 rounds, so we have to loop
; here till we've got a final result. We count down in ECX to
; avoid getting stuck here...
;
mov ecx, 16384 / 32 + 4
.again:
fprem1
fstsw ax
test ah, (X86_FSW_C2 >> 8)
jz .done
dec cx
jnz .again
%ifdef RT_STRICT
int3
%endif
;
; Return the result.
;
.done:
fstp st1
leave
ret
ENDPROC RT_NOCRT(remainderl)
|
