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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
|
; Copyright (C) 2011-2021 Free Software Foundation, Inc.
; Contributed by Red Hat.
;
; This file is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 3, or (at your option) any
; later version.
;
; This file is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; Under Section 7 of GPL version 3, you are granted additional
; permissions described in the GCC Runtime Library Exception, version
; 3.1, as published by the Free Software Foundation.
;
; You should have received a copy of the GNU General Public License and
; a copy of the GCC Runtime Library Exception along with this program;
; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
; <http://www.gnu.org/licenses/>.
;; 32x32=32 multiply
#include "vregs.h"
;----------------------------------------------------------------------
; Register use:
; RB0 RB1 RB2
; AX op2L res32L res32H
; BC op2H (resH) op1
; DE count (resL-tmp)
; HL [sp+4]
; Register use (G10):
;
; AX op2L
; BC op2H
; DE count
; HL [sp+4]
; r8/r9 res32L
; r10/r11 (resH)
; r12/r13 (resL-tmp)
; r16/r17 res32H
; r18/r19 op1
START_FUNC ___mulsi3
;; A is at [sp+4]
;; B is at [sp+8]
;; result is in R8..R11
#ifdef __RL78_G10__
movw ax, r16
push ax
movw ax, r18
push ax
#else
sel rb2
push ax
push bc
sel rb0
#endif
clrw ax
movw r8, ax
movw r16, ax
movw ax, [sp+14]
cmpw ax, #0
bz $1f
cmpw ax, #0xffff
bnz $2f
movw ax, [sp+8]
#ifdef __RL78_G10__
push bc
movw bc, r8
xchw ax, bc
subw ax, bc
movw r8, ax
movw ax, bc
pop bc
#else
sel rb1
subw ax, r_0
sel rb0
#endif
br $1f
2:
movw bc, ax
movw ax, [sp+8]
cmpw ax, #0
skz
call !.Lmul_hi
1:
movw ax, [sp+10]
cmpw ax, #0
bz $1f
cmpw ax, #0xffff
bnz $2f
movw ax, [sp+12]
#ifdef __RL78_G10__
push bc
movw bc, r8
xchw ax, bc
subw ax, bc
movw r8, ax
movw ax, bc
pop bc
#else
sel rb1
subw ax, r_0
sel rb0
#endif
br $1f
2:
movw bc, ax
movw ax, [sp+12]
cmpw ax, #0
skz
call !.Lmul_hi
1:
movw ax, r8
movw r16, ax
clrw ax
movw r8, ax
;; now do R16:R8 += op1L * op2L
;; op1 is in AX.0 (needs to shrw)
;; op2 is in BC.2 and BC.1 (bc can shlw/rolcw)
;; res is in AX.2 and AX.1 (needs to addw)
movw ax, [sp+8]
movw r10, ax ; BC.1
movw ax, [sp+12]
cmpw ax, r10
bc $.Lmul_hisi_top
movw bc, r10
movw r10, ax
movw ax, bc
.Lmul_hisi_top:
movw bc, #0
.Lmul_hisi_loop:
shrw ax, 1
#ifdef __RL78_G10__
push ax
bnc $.Lmul_hisi_no_add_g10
movw ax, r8
addw ax, r10
movw r8, ax
sknc
incw r16
movw ax, r16
addw ax, r_2
movw r16, ax
.Lmul_hisi_no_add_g10:
movw ax, r10
shlw ax, 1
movw r10, ax
pop ax
#else
bnc $.Lmul_hisi_no_add
sel rb1
addw ax, bc
sel rb2
sknc
incw ax
addw ax, r_2
.Lmul_hisi_no_add:
sel rb1
shlw bc, 1
sel rb0
#endif
rolwc bc, 1
cmpw ax, #0
bz $.Lmul_hisi_done
shrw ax, 1
#ifdef __RL78_G10__
push ax
bnc $.Lmul_hisi_no_add2_g10
movw ax, r8
addw ax, r10
movw r8, ax
movw ax, r16
sknc
incw ax
addw ax, r_2
movw r16, ax
.Lmul_hisi_no_add2_g10:
movw ax, r10
shlw ax, 1
movw r10, ax
pop ax
#else
bnc $.Lmul_hisi_no_add2
sel rb1
addw ax, bc
sel rb2
sknc
incw ax
addw ax, r_2
.Lmul_hisi_no_add2:
sel rb1
shlw bc, 1
sel rb0
#endif
rolwc bc, 1
cmpw ax, #0
bnz $.Lmul_hisi_loop
.Lmul_hisi_done:
movw ax, r16
movw r10, ax
#ifdef __RL78_G10__
pop ax
movw r18, ax
pop ax
movw r16, ax
#else
sel rb2
pop bc
pop ax
sel rb0
#endif
ret
END_FUNC ___mulsi3
;----------------------------------------------------------------------
START_FUNC ___mulhi3
movw r8, #0
movw ax, [sp+6]
movw bc, ax
movw ax, [sp+4]
;; R8 += AX * BC
.Lmul_hi:
cmpw ax, bc
skc
xchw ax, bc
br $.Lmul_hi_loop
.Lmul_hi_top:
#ifdef __RL78_G10__
push ax
movw ax, r8
addw ax, r_2
movw r8, ax
pop ax
#else
sel rb1
addw ax, r_2
sel rb0
#endif
.Lmul_hi_no_add:
shlw bc, 1
.Lmul_hi_loop:
shrw ax, 1
bc $.Lmul_hi_top
cmpw ax, #0
bz $.Lmul_hi_done
shlw bc, 1
shrw ax, 1
bc $.Lmul_hi_top
cmpw ax, #0
bnz $.Lmul_hi_no_add
.Lmul_hi_done:
ret
END_FUNC ___mulhi3
;;; --------------------------------------
#ifdef __RL78_G10__
START_FUNC ___mulqi3
mov a, [sp+4]
mov r9, a
mov a, [sp+6]
mov r10, a
mov a, #9
mov r11, a
clrb a
mov r8, a
.L2:
cmp0 r10
skz
dec r11
sknz
ret
mov a, r10
and a, #1
mov r12, a
cmp0 r12
sknz
br !!.L3
mov a, r9
mov l, a
mov a, r8
add a, l
mov r8, a
.L3:
mov a, r9
add a, a
mov r9, a
mov a, r10
shr a, 1
mov r10, a
br !!.L2
END_FUNC ___mulqi3
#endif
|
