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
|
/* Copyright (C) 2004-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include "div_libc.h"
/* 32-bit signed int divide. This is not a normal C function. Argument
registers are t10 and t11, the result goes in t12. Only t12 and AT may
be clobbered.
The FPU can handle all input values except zero. Whee!
The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
for cvttq/c even without /sui being set. It will not, however, properly
raise the exception, so we don't have to worry about FPCR_INED being clear
and so dying by SIGFPE. */
#ifndef EXTEND
#define EXTEND(S,D) sextl S, D
#endif
.text
.align 4
.globl __divl
.type __divl, @funcnoplt
.usepv __divl, no
cfi_startproc
cfi_return_column (RA)
__divl:
lda sp, -FRAME(sp)
cfi_def_cfa_offset (FRAME)
CALL_MCOUNT
stt $f0, 0(sp)
excb
beq Y, DIVBYZERO
stt $f1, 8(sp)
stt $f2, 16(sp)
cfi_rel_offset ($f0, 0)
cfi_rel_offset ($f1, 8)
cfi_rel_offset ($f2, 16)
mf_fpcr $f2
EXTEND (X, RV)
EXTEND (Y, AT)
_ITOFT2 RV, $f0, 24, AT, $f1, 32
cvtqt $f0, $f0
cvtqt $f1, $f1
divt/c $f0, $f1, $f0
cvttq/c $f0, $f0
excb
mt_fpcr $f2
_FTOIT $f0, RV, 24
ldt $f0, 0(sp)
ldt $f1, 8(sp)
ldt $f2, 16(sp)
lda sp, FRAME(sp)
cfi_restore ($f0)
cfi_restore ($f1)
cfi_restore ($f2)
cfi_def_cfa_offset (0)
sextl RV, RV
ret $31, (RA), 1
cfi_endproc
.size __divl, .-__divl
DO_DIVBYZERO
|
