summaryrefslogtreecommitdiff
path: root/lib/libc_fp/arch/mips/fpdf.S
blob: bb740bab0de26fcc952cc238c86adedb5de82ae8 (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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/*-
 * Copyright (c) 2013 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <mips/asm.h>

RCSID("$NetBSD: fpdf.S,v 1.1 2016/07/14 01:59:18 matt Exp $")

/*
 * This file provides softfloat compatible routines which use FP instructions
 * to do the actual work.  This should give near hard-float performance while
 * being compatible with soft-float code.
 *
 * This file implements the double precision floating point routines.
 */

#ifdef MIPS3
#define	COP1_SYNC	nop
#else
#define	COP1_SYNC
#endif

LEAF_NOPROFILE(__adddf3)
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	add.d		$f0, $f12, $f14
	dmfc1		v0, $f0
	jr		ra
END(__adddf3)

LEAF_NOPROFILE(__subdf3)
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	sub.d		$f0, $f12, $f14
	dmfc1		v0, $f0
	jr		ra
END(__subdf3)

LEAF_NOPROFILE(__muldf3)
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	mul.d		$f0, $f12, $f14
	dmfc1		v0, $f0
	jr		ra
END(__muldf3)

LEAF_NOPROFILE(__divdf3)
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	div.d		$f0, $f12, $f14
	dmfc1		v0, $f0
	jr		ra
END(__divdf3)

LEAF_NOPROFILE(__negdf2)
	dmtc1		a0, $f12
	COP1_SYNC
	neg.d		$f0, $f12
	dmfc1		v0, $f0
	jr		ra
END(__negdf2)

LEAF_NOPROFILE(__extendsfdf2)
	dmtc1		a0, $f12
	COP1_SYNC
	cvt.d.s		$f0, $f12
	dmfc1		v0, $f0
	jr		ra
END(__extendsfdf2)

LEAF_NOPROFILE(__fixdfdi)
	dmtc1		a0, $f12
	COP1_SYNC
	trunc.l.d	$f0, $f12
	dmfc1		v0, $f0
	jr		ra
END(__fixdfdi)

LEAF_NOPROFILE(__fixdfsi)
	dmtc1		a0, $f12
	COP1_SYNC
	trunc.w.d	$f0, $f12
	mfc1		v0, $f0
	jr		ra
END(__fixdfsi)

LEAF_NOPROFILE(__fixunsdfdi)
	lui		t0, 0x43e0	# 9223372036854775808.0
	dsll		t0, t0, 32
	mtc1		t0, $f0
	mtc1		a0, $f12
	COP1_SYNC
	sub.d		$f0, $f12, $f0	# convert to signed 
        trunc.l.d	$f0, $f0
	dmfc1		v0, $f0
	li		v1, 1
	dsll		v1, v1, 63
	add		v0, v0, v1	# convert to unsigned
	jr		ra
END(__fixunsdfdi)

LEAF_NOPROFILE(__fixunsdfsi)
	lui		t0, 0x41e0	# 2147483648.0
	dsll		t0, t0, 32
	mtc1		t0, $f0
	mtc1		a0, $f12
	COP1_SYNC
	sub.d		$f0, $f12, $f0	# convert to signed 
        trunc.w.d	$f0, $f0
	lui		v1, 0x8000	# 0xffffffff80000000
	mfc1		v0, $f0
	add		v0, v0, v1	# convert to unsigned
	jr		ra
END(__fixunsdfsi)

LEAF_NOPROFILE(__floatdidf)
	dmtc1		a0, $f12
	COP1_SYNC
	cvt.d.l		$f0, $f12
	dmfc1		v0, $f0
	jr		ra
END(__floatdidf)

LEAF_NOPROFILE(__floatsidf)
	mtc1		a0, $f12
	COP1_SYNC
	cvt.d.w		$f0, $f12
	dmfc1		v0, $f0
	jr		ra
END(__floatsidf)

LEAF_NOPROFILE(__floatundidf)
	li		t0, 1
	dsll		t0, t0, 63
	dsub		a0, a0, t0
	dmtc1		a0, $f12
	dmtc1		t0, $f14
	COP1_SYNC
	cvt.d.l		$f0, $f12
	cvt.d.l		$f2, $f14
	add.d		$f0, $f0, $f2
	dmfc1		v0, $f0 
	jr		ra
END(__floatundidf)

LEAF_NOPROFILE(__floatunsidf)
	sll		a0, a0, 0
	dmtc1		a0, $f12
	COP1_SYNC
	cvt.d.l		$f0, $f12
	dmfc1		v0, $f0 
	jr		ra
END(__floatunsidf)

STRONG_ALIAS(__eqdf2, __nedf2)
LEAF_NOPROFILE(__nedf2)
	.set push
	.set noreorder
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	c.eq.d		$f12, $f14
	bc1f		2f
	 li		v0, 1
	move		v0, zero
2:	jr		ra
	 nop
	.set pop
END(__nedf2)

STRONG_ALIAS(__gedf2, __ltdf2)
LEAF_NOPROFILE(__ltdf2)
	.set push
	.set noreorder
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	c.olt.d		$f12, $f14
	bc1t		2f
	 li		v0, -1
	move		v0, zero
2:	jr		ra
	 nop
	.set pop
END(__ltdf2)

STRONG_ALIAS(__gtdf2, __ledf2)
LEAF_NOPROFILE(__ledf2)
	.set push
	.set noreorder
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	c.ole.d		$f12, $f14
	bc1f		2f
	 li		v0, 1
	move		v0, zero
2:	jr		ra
	 nop
	.set pop
END(__ledf2)

LEAF_NOPROFILE(__unorddf2)
	.set push
	.set noreorder
	dmtc1		a0, $f12
	dmtc1		a1, $f14
	COP1_SYNC
	c.un.d		$f12, $f14
	bc1t		2f
	 li		v0, 1
	move		v0, zero
2:	jr		ra
	 nop
	.set pop
END(__unorddf2)