fp_move.S

  1/*
  2 * fp_move.S
  3 *
  4 * Copyright Roman Zippel, 1997.  All rights reserved.
  5 *
  6 * Redistribution and use in source and binary forms, with or without
  7 * modification, are permitted provided that the following conditions
  8 * are met:
  9 * 1. Redistributions of source code must retain the above copyright
 10 *    notice, and the entire permission notice in its entirety,
 11 *    including the disclaimer of warranties.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. The name of the author may not be used to endorse or promote
 16 *    products derived from this software without specific prior
 17 *    written permission.
 18 *
 19 * ALTERNATIVELY, this product may be distributed under the terms of
 20 * the GNU General Public License, in which case the provisions of the GPL are
 21 * required INSTEAD OF the above restrictions.  (This clause is
 22 * necessary due to a potential bad interaction between the GPL and
 23 * the restrictions contained in a BSD-style copyright.)
 24 *
 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 28 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 33 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 35 * OF THE POSSIBILITY OF SUCH DAMAGE.
 36 */
 37
 38#include "fp_emu.h"
 39#include "fp_decode.h"
 40
 41do_no_pc_mode=1
 42
 43	.globl	fp_fmove_fp2mem
 44
 45fp_fmove_fp2mem:
 46	clr.b	(2+FPD_FPSR,FPDATA)
 47	fp_decode_dest_format
 48	move.w	%d0,%d1			| store data size twice in %d1
 49	swap	%d1			| one can be trashed below
 50	move.w	%d0,%d1
 51#ifdef FPU_EMU_DEBUG
 52	lea	0f,%a0
 53	clr.l	%d0
 54	move.b	(%a0,%d1.w),%d0
 55	printf	PDECODE,"fmove.%c ",1,%d0
 56	fp_decode_src_reg
 57	printf	PDECODE,"fp%d,",1,%d0
 58
 59	.data
 600:	.byte	'l','s','x','p','w','d','b','p'
 61	.previous
 62#endif
 63
 64	| encode addressing mode for dest
 65	fp_decode_addr_mode
 66
 67	.long	fp_data, fp_ill
 68	.long	fp_indirect, fp_postinc
 69	.long	fp_predecr, fp_disp16
 70	.long	fp_extmode0, fp_extmode1
 71
 72	| addressing mode: data register direct
 73fp_data:
 74	fp_mode_data_direct
 75	move.w	%d0,%d1
 76	fp_decode_src_reg
 77	fp_get_fp_reg
 78	lea	(FPD_TEMPFP1,FPDATA),%a1
 79	move.l	(%a0)+,(%a1)+
 80	move.l	(%a0)+,(%a1)+
 81	move.l	(%a0),(%a1)
 82	lea	(-8,%a1),%a0
 83	swap	%d1
 84	move.l	%d1,%d2
 85	printf	PDECODE,"\n"
 86	jmp	([0f:w,%pc,%d1.w*4])
 87
 88	.align	4
 890:
 90	.long	fp_data_long, fp_data_single
 91	.long	fp_ill, fp_ill
 92	.long	fp_data_word, fp_ill
 93	.long	fp_data_byte, fp_ill
 94
 95fp_data_byte:
 96	jsr	fp_normalize_ext
 97	jsr	fp_conv_ext2byte
 98	move.l	%d0,%d1
 99	swap	%d2
100	move.w	%d2,%d0
101	jsr	fp_get_data_reg
102	move.b	%d1,%d0
103	move.w	%d2,%d1
104	jsr	fp_put_data_reg
105	jra	fp_final
106
107fp_data_word:
108	jsr	fp_normalize_ext
109	jsr	fp_conv_ext2short
110	move.l	%d0,%d1
111	swap	%d2
112	move.w	%d2,%d0
113	jsr	fp_get_data_reg
114	move.w	%d1,%d0
115	move.l	%d2,%d1
116	jsr	fp_put_data_reg
117	jra	fp_final
118
119fp_data_long:
120	jsr	fp_normalize_ext
121	jsr	fp_conv_ext2long
122	swap	%d2
123	move.w	%d2,%d1
124	jsr	fp_put_data_reg
125	jra	fp_final
126
127fp_data_single:
128	jsr	fp_normalize_ext
129	jsr	fp_conv_ext2single
130	swap	%d2
131	move.w	%d2,%d1
132	jsr	fp_put_data_reg
133	jra	fp_final
134
135	| addressing mode: address register indirect
136fp_indirect:
137	fp_mode_addr_indirect
138	jra	fp_putdest
139
140	| addressing mode: address register indirect with postincrement
141fp_postinc:
142	fp_mode_addr_indirect_postinc
143	jra	fp_putdest
144
145	| addressing mode: address register indirect with predecrement
146fp_predecr:
147	fp_mode_addr_indirect_predec
148	jra	fp_putdest
149
150	| addressing mode: address register indirect with 16bit displacement
151fp_disp16:
152	fp_mode_addr_indirect_disp16
153	jra     fp_putdest
154
155fp_extmode0:
156	fp_mode_addr_indirect_extmode0
157	jra	fp_putdest
158
159fp_extmode1:
160	fp_decode_addr_reg
161	jmp	([0f:w,%pc,%d0*4])
162
163	.align	4
1640:
165	.long	fp_abs_short, fp_abs_long
166	.long	fp_ill, fp_ill
167	.long	fp_ill, fp_ill
168	.long	fp_ill, fp_ill
169
170fp_abs_short:
171	fp_mode_abs_short
172	jra	fp_putdest
173
174fp_abs_long:
175	fp_mode_abs_long
176	jra	fp_putdest
177
178fp_putdest:
179	move.l	%a0,%a1
180	fp_decode_src_reg
181	move.l	%d1,%d2			| save size
182	fp_get_fp_reg
183	printf	PDECODE,"\n"
184	addq.l	#8,%a0
185	move.l	(%a0),-(%sp)
186	move.l	-(%a0),-(%sp)
187	move.l	-(%a0),-(%sp)
188	move.l	%sp,%a0
189	jsr	fp_normalize_ext
190
191	swap	%d2
192	jmp	([0f:w,%pc,%d2.w*4])
193
194	.align	4
1950:
196	.long	fp_format_long, fp_format_single
197	.long	fp_format_extended, fp_format_packed
198	.long	fp_format_word, fp_format_double
199	.long	fp_format_byte, fp_format_packed
200
201fp_format_long:
202	jsr	fp_conv_ext2long
203	putuser.l %d0,(%a1),fp_err_ua1,%a1
204	jra	fp_finish_move
205
206fp_format_single:
207	jsr	fp_conv_ext2single
208	putuser.l %d0,(%a1),fp_err_ua1,%a1
209	jra	fp_finish_move
210
211fp_format_extended:
212	move.l	(%a0)+,%d0
213	lsl.w	#1,%d0
214	lsl.l	#7,%d0
215	lsl.l	#8,%d0
216	putuser.l %d0,(%a1)+,fp_err_ua1,%a1
217	move.l	(%a0)+,%d0
218	putuser.l %d0,(%a1)+,fp_err_ua1,%a1
219	move.l	(%a0),%d0
220	putuser.l %d0,(%a1),fp_err_ua1,%a1
221	jra	fp_finish_move
222
223fp_format_packed:
224	/* not supported yet */
225	lea	(12,%sp),%sp
226	jra	fp_ill
227
228fp_format_word:
229	jsr	fp_conv_ext2short
230	putuser.w %d0,(%a1),fp_err_ua1,%a1
231	jra	fp_finish_move
232
233fp_format_double:
234	jsr	fp_conv_ext2double
235	jra	fp_finish_move
236
237fp_format_byte:
238	jsr	fp_conv_ext2byte
239	putuser.b %d0,(%a1),fp_err_ua1,%a1
240|	jra	fp_finish_move
241
242fp_finish_move:
243	lea	(12,%sp),%sp
244	jra	fp_final