summaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/cpu/sh5/fpu.c
blob: 9218d9ed787e87d1095029b39ce0ee5dbe33d9e1 (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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/kernel/cpu/sh5/fpu.c
 *
 * Copyright (C) 2001  Manuela Cirronis, Paolo Alberelli
 * Copyright (C) 2002  STMicroelectronics Limited
 *   Author : Stuart Menefy
 *
 * Started from SH4 version:
 *   Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
 */
#include <linux/sched.h>
#include <linux/signal.h>
#include <asm/processor.h>

void save_fpu(struct task_struct *tsk)
{
	asm volatile("fst.p     %0, (0*8), fp0\n\t"
		     "fst.p     %0, (1*8), fp2\n\t"
		     "fst.p     %0, (2*8), fp4\n\t"
		     "fst.p     %0, (3*8), fp6\n\t"
		     "fst.p     %0, (4*8), fp8\n\t"
		     "fst.p     %0, (5*8), fp10\n\t"
		     "fst.p     %0, (6*8), fp12\n\t"
		     "fst.p     %0, (7*8), fp14\n\t"
		     "fst.p     %0, (8*8), fp16\n\t"
		     "fst.p     %0, (9*8), fp18\n\t"
		     "fst.p     %0, (10*8), fp20\n\t"
		     "fst.p     %0, (11*8), fp22\n\t"
		     "fst.p     %0, (12*8), fp24\n\t"
		     "fst.p     %0, (13*8), fp26\n\t"
		     "fst.p     %0, (14*8), fp28\n\t"
		     "fst.p     %0, (15*8), fp30\n\t"
		     "fst.p     %0, (16*8), fp32\n\t"
		     "fst.p     %0, (17*8), fp34\n\t"
		     "fst.p     %0, (18*8), fp36\n\t"
		     "fst.p     %0, (19*8), fp38\n\t"
		     "fst.p     %0, (20*8), fp40\n\t"
		     "fst.p     %0, (21*8), fp42\n\t"
		     "fst.p     %0, (22*8), fp44\n\t"
		     "fst.p     %0, (23*8), fp46\n\t"
		     "fst.p     %0, (24*8), fp48\n\t"
		     "fst.p     %0, (25*8), fp50\n\t"
		     "fst.p     %0, (26*8), fp52\n\t"
		     "fst.p     %0, (27*8), fp54\n\t"
		     "fst.p     %0, (28*8), fp56\n\t"
		     "fst.p     %0, (29*8), fp58\n\t"
		     "fst.p     %0, (30*8), fp60\n\t"
		     "fst.p     %0, (31*8), fp62\n\t"

		     "fgetscr   fr63\n\t"
		     "fst.s     %0, (32*8), fr63\n\t"
		: /* no output */
		: "r" (&tsk->thread.xstate->hardfpu)
		: "memory");
}

void restore_fpu(struct task_struct *tsk)
{
	asm volatile("fld.p     %0, (0*8), fp0\n\t"
		     "fld.p     %0, (1*8), fp2\n\t"
		     "fld.p     %0, (2*8), fp4\n\t"
		     "fld.p     %0, (3*8), fp6\n\t"
		     "fld.p     %0, (4*8), fp8\n\t"
		     "fld.p     %0, (5*8), fp10\n\t"
		     "fld.p     %0, (6*8), fp12\n\t"
		     "fld.p     %0, (7*8), fp14\n\t"
		     "fld.p     %0, (8*8), fp16\n\t"
		     "fld.p     %0, (9*8), fp18\n\t"
		     "fld.p     %0, (10*8), fp20\n\t"
		     "fld.p     %0, (11*8), fp22\n\t"
		     "fld.p     %0, (12*8), fp24\n\t"
		     "fld.p     %0, (13*8), fp26\n\t"
		     "fld.p     %0, (14*8), fp28\n\t"
		     "fld.p     %0, (15*8), fp30\n\t"
		     "fld.p     %0, (16*8), fp32\n\t"
		     "fld.p     %0, (17*8), fp34\n\t"
		     "fld.p     %0, (18*8), fp36\n\t"
		     "fld.p     %0, (19*8), fp38\n\t"
		     "fld.p     %0, (20*8), fp40\n\t"
		     "fld.p     %0, (21*8), fp42\n\t"
		     "fld.p     %0, (22*8), fp44\n\t"
		     "fld.p     %0, (23*8), fp46\n\t"
		     "fld.p     %0, (24*8), fp48\n\t"
		     "fld.p     %0, (25*8), fp50\n\t"
		     "fld.p     %0, (26*8), fp52\n\t"
		     "fld.p     %0, (27*8), fp54\n\t"
		     "fld.p     %0, (28*8), fp56\n\t"
		     "fld.p     %0, (29*8), fp58\n\t"
		     "fld.p     %0, (30*8), fp60\n\t"

		     "fld.s     %0, (32*8), fr63\n\t"
		     "fputscr   fr63\n\t"

		     "fld.p     %0, (31*8), fp62\n\t"
		: /* no output */
		: "r" (&tsk->thread.xstate->hardfpu)
		: "memory");
}

asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs)
{
	struct task_struct *tsk = current;

	regs->pc += 4;

	force_sig(SIGFPE, tsk);
}