1/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library.  If not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include "div_libc.h"
19
20/* 32-bit signed int divide.  This is not a normal C function.  Argument
21   registers are t10 and t11, the result goes in t12.  Only t12 and AT may
22   be clobbered.
23
24   The FPU can handle all input values except zero.  Whee!
25
26   The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE
27   for cvttq/c even without /sui being set.  It will not, however, properly
28   raise the exception, so we don't have to worry about FPCR_INED being clear
29   and so dying by SIGFPE.  */
30
31#ifndef EXTEND
32#define EXTEND(S,D)	sextl S, D
33#endif
34
35	.text
36	.align	4
37	.globl	__divl
38	.type	__divl, @funcnoplt
39	.usepv	__divl, no
40
41	cfi_startproc
42	cfi_return_column (RA)
43__divl:
44	lda	sp, -FRAME(sp)
45	cfi_def_cfa_offset (FRAME)
46	CALL_MCOUNT
47	stt	$f0, 0(sp)
48	excb
49	beq	Y, DIVBYZERO
50
51	stt	$f1, 8(sp)
52	stt	$f2, 16(sp)
53	cfi_rel_offset ($f0, 0)
54	cfi_rel_offset ($f1, 8)
55	cfi_rel_offset ($f2, 16)
56	mf_fpcr	$f2
57
58	EXTEND	(X, RV)
59	EXTEND	(Y, AT)
60	_ITOFT2	RV, $f0, 24, AT, $f1, 32
61	cvtqt	$f0, $f0
62	cvtqt	$f1, $f1
63	divt/c	$f0, $f1, $f0
64	cvttq/c	$f0, $f0
65	excb
66	mt_fpcr	$f2
67	_FTOIT	$f0, RV, 24
68
69	ldt	$f0, 0(sp)
70	ldt	$f1, 8(sp)
71	ldt	$f2, 16(sp)
72	lda	sp, FRAME(sp)
73	cfi_restore ($f0)
74	cfi_restore ($f1)
75	cfi_restore ($f2)
76	cfi_def_cfa_offset (0)
77	sextl	RV, RV
78	ret	$31, (RA), 1
79
80	cfi_endproc
81	.size	__divl, .-__divl
82
83	DO_DIVBYZERO
84