aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/math-emu/fp_move.S
blob: 71bdf83ba61a84a1632781364bb43cc0f0abd0db (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
/*
 * fp_move.S
 *
 * Copyright Roman Zippel, 1997.  All rights reserved.
 *
 * 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, and the entire permission notice in its entirety,
 *    including the disclaimer of warranties.
 * 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.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * ALTERNATIVELY, this product may be distributed under the terms of
 * the GNU General Public License, in which case the provisions of the GPL are
 * required INSTEAD OF the above restrictions.  (This clause is
 * necessary due to a potential bad interaction between the GPL and
 * the restrictions contained in a BSD-style copyright.)
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 "fp_emu.h"
#include "fp_decode.h"

do_no_pc_mode=1

	.globl	fp_fmove_fp2mem

fp_fmove_fp2mem:
	clr.b	(2+FPD_FPSR,FPDATA)
	fp_decode_dest_format
	move.w	%d0,%d1			| store data size twice in %d1
	swap	%d1			| one can be trashed below
	move.w	%d0,%d1
#ifdef FPU_EMU_DEBUG
	lea	0f,%a0
	clr.l	%d0
	move.b	(%a0,%d1.w),%d0
	printf	PDECODE,"fmove.%c ",1,%d0
	fp_decode_src_reg
	printf	PDECODE,"fp%d,",1,%d0

	.data
0:	.byte	'l','s','x','p','w','d','b','p'
	.previous
#endif

	| encode addressing mode for dest
	fp_decode_addr_mode

	.long	fp_data, fp_ill
	.long	fp_indirect, fp_postinc
	.long	fp_predecr, fp_disp16
	.long	fp_extmode0, fp_extmode1

	| addressing mode: data register direct
fp_data:
	fp_mode_data_direct
	move.w	%d0,%d1
	fp_decode_src_reg
	fp_get_fp_reg
	lea	(FPD_TEMPFP1,FPDATA),%a1
	move.l	(%a0)+,(%a1)+
	move.l	(%a0)+,(%a1)+
	move.l	(%a0),(%a1)
	lea	(-8,%a1),%a0
	swap	%d1
	move.l	%d1,%d2
	printf	PDECODE,"\n"
	jmp	([0f:w,%pc,%d1.w*4])

	.align	4
0:
	.long	fp_data_long, fp_data_single
	.long	fp_ill, fp_ill
	.long	fp_data_word, fp_ill
	.long	fp_data_byte, fp_ill

fp_data_byte:
	jsr	fp_normalize_ext
	jsr	fp_conv_ext2byte
	move.l	%d0,%d1
	swap	%d2
	move.w	%d2,%d0
	jsr	fp_get_data_reg
	move.b	%d1,%d0
	move.w	%d2,%d1
	jsr	fp_put_data_reg
	jra	fp_final

fp_data_word:
	jsr	fp_normalize_ext
	jsr	fp_conv_ext2short
	move.l	%d0,%d1
	swap	%d2
	move.w	%d2,%d0
	jsr	fp_get_data_reg
	move.w	%d1,%d0
	move.l	%d2,%d1
	jsr	fp_put_data_reg
	jra	fp_final

fp_data_long:
	jsr	fp_normalize_ext
	jsr	fp_conv_ext2long
	swap	%d2
	move.w	%d2,%d1
	jsr	fp_put_data_reg
	jra	fp_final

fp_data_single:
	jsr	fp_normalize_ext
	jsr	fp_conv_ext2single
	swap	%d2
	move.w	%d2,%d1
	jsr	fp_put_data_reg
	jra	fp_final

	| addressing mode: address register indirect
fp_indirect:
	fp_mode_addr_indirect
	jra	fp_putdest

	| addressing mode: address register indirect with postincrement
fp_postinc:
	fp_mode_addr_indirect_postinc
	jra	fp_putdest

	| addressing mode: address register indirect with predecrement
fp_predecr:
	fp_mode_addr_indirect_predec
	jra	fp_putdest

	| addressing mode: address register indirect with 16bit displacement
fp_disp16:
	fp_mode_addr_indirect_disp16
	jra     fp_putdest

fp_extmode0:
	fp_mode_addr_indirect_extmode0
	jra	fp_putdest

fp_extmode1:
	fp_decode_addr_reg
	jmp	([0f:w,%pc,%d0*4])

	.align	4
0:
	.long	fp_abs_short, fp_abs_long
	.long	fp_ill, fp_ill
	.long	fp_ill, fp_ill
	.long	fp_ill, fp_ill

fp_abs_short:
	fp_mode_abs_short
	jra	fp_putdest

fp_abs_long:
	fp_mode_abs_long
	jra	fp_putdest

fp_putdest:
	move.l	%a0,%a1
	fp_decode_src_reg
	move.l	%d1,%d2			| save size
	fp_get_fp_reg
	printf	PDECODE,"\n"
	addq.l	#8,%a0
	move.l	(%a0),-(%sp)
	move.l	-(%a0),-(%sp)
	move.l	-(%a0),-(%sp)
	move.l	%sp,%a0
	jsr	fp_normalize_ext

	swap	%d2
	jmp	([0f:w,%pc,%d2.w*4])

	.align	4
0:
	.long	fp_format_long, fp_format_single
	.long	fp_format_extended, fp_format_packed
	.long	fp_format_word, fp_format_double
	.long	fp_format_byte, fp_format_packed

fp_format_long:
	jsr	fp_conv_ext2long
	putuser.l %d0,(%a1),fp_err_ua1,%a1
	jra	fp_finish_move

fp_format_single:
	jsr	fp_conv_ext2single
	putuser.l %d0,(%a1),fp_err_ua1,%a1
	jra	fp_finish_move

fp_format_extended:
	move.l	(%a0)+,%d0
	lsl.w	#1,%d0
	lsl.l	#7,%d0
	lsl.l	#8,%d0
	putuser.l %d0,(%a1)+,fp_err_ua1,%a1
	move.l	(%a0)+,%d0
	putuser.l %d0,(%a1)+,fp_err_ua1,%a1
	move.l	(%a0),%d0
	putuser.l %d0,(%a1),fp_err_ua1,%a1
	jra	fp_finish_move

fp_format_packed:
	/* not supported yet */
	lea	(12,%sp),%sp
	jra	fp_ill

fp_format_word:
	jsr	fp_conv_ext2short
	putuser.w %d0,(%a1),fp_err_ua1,%a1
	jra	fp_finish_move

fp_format_double:
	jsr	fp_conv_ext2double
	jra	fp_finish_move

fp_format_byte:
	jsr	fp_conv_ext2byte
	putuser.b %d0,(%a1),fp_err_ua1,%a1
|	jra	fp_finish_move

fp_finish_move:
	lea	(12,%sp),%sp
	jra	fp_final