summaryrefslogtreecommitdiff
path: root/target-sh4/op_helper.c
blob: 8c8318f1e316745dcf48e2c667b4ebe3704c4d82 (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
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
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/*
 *  SH4 emulation
 *
 *  Copyright (c) 2005 Samuel Tardieu
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <assert.h>
#include "exec.h"

void do_raise_exception(void)
{
    cpu_loop_exit();
}

#ifndef CONFIG_USER_ONLY

#define MMUSUFFIX _mmu

#define SHIFT 0
#include "softmmu_template.h"

#define SHIFT 1
#include "softmmu_template.h"

#define SHIFT 2
#include "softmmu_template.h"

#define SHIFT 3
#include "softmmu_template.h"

void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr)
{
    TranslationBlock *tb;
    CPUState *saved_env;
    unsigned long pc;
    int ret;

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;
    ret = cpu_sh4_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
    if (ret) {
	if (retaddr) {
	    /* now we have a real cpu fault */
	    pc = (unsigned long) retaddr;
	    tb = tb_find_pc(pc);
	    if (tb) {
		/* the PC is inside the translated code. It means that we have
		   a virtual CPU fault */
		cpu_restore_state(tb, env, pc, NULL);
	    }
	}
	do_raise_exception();
    }
    env = saved_env;
}

#endif

void helper_ldtlb(void)
{
#ifdef CONFIG_USER_ONLY
    /* XXXXX */
    assert(0);
#else
    cpu_load_tlb(env);
#endif
}

void helper_addc_T0_T1(void)
{
    uint32_t tmp0, tmp1;

    tmp1 = T0 + T1;
    tmp0 = T1;
    T1 = tmp1 + (env->sr & 1);
    if (tmp0 > tmp1)
	env->sr |= SR_T;
    else
	env->sr &= ~SR_T;
    if (tmp1 > T1)
	env->sr |= SR_T;
}

void helper_addv_T0_T1(void)
{
    uint32_t dest, src, ans;

    if ((int32_t) T1 >= 0)
	dest = 0;
    else
	dest = 1;
    if ((int32_t) T0 >= 0)
	src = 0;
    else
	src = 1;
    src += dest;
    T1 += T0;
    if ((int32_t) T1 >= 0)
	ans = 0;
    else
	ans = 1;
    ans += dest;
    if (src == 0 || src == 2) {
	if (ans == 1)
	    env->sr |= SR_T;
	else
	    env->sr &= ~SR_T;
    } else
	env->sr &= ~SR_T;
}

#define T (env->sr & SR_T)
#define Q (env->sr & SR_Q ? 1 : 0)
#define M (env->sr & SR_M ? 1 : 0)
#define SETT env->sr |= SR_T
#define CLRT env->sr &= ~SR_T
#define SETQ env->sr |= SR_Q
#define CLRQ env->sr &= ~SR_Q
#define SETM env->sr |= SR_M
#define CLRM env->sr &= ~SR_M

void helper_div1_T0_T1(void)
{
    uint32_t tmp0, tmp2;
    uint8_t old_q, tmp1 = 0xff;

    //printf("div1 T0=0x%08x T1=0x%08x M=%d Q=%d T=%d\n", T0, T1, M, Q, T);
    old_q = Q;
    if ((0x80000000 & T1) != 0)
	SETQ;
    else
	CLRQ;
    tmp2 = T0;
    T1 <<= 1;
    T1 |= T;
    switch (old_q) {
    case 0:
	switch (M) {
	case 0:
	    tmp0 = T1;
	    T1 -= tmp2;
	    tmp1 = T1 > tmp0;
	    switch (Q) {
	    case 0:
		if (tmp1)
		    SETQ;
		else
		    CLRQ;
		break;
	    case 1:
		if (tmp1 == 0)
		    SETQ;
		else
		    CLRQ;
		break;
	    }
	    break;
	case 1:
	    tmp0 = T1;
	    T1 += tmp2;
	    tmp1 = T1 < tmp0;
	    switch (Q) {
	    case 0:
		if (tmp1 == 0)
		    SETQ;
		else
		    CLRQ;
		break;
	    case 1:
		if (tmp1)
		    SETQ;
		else
		    CLRQ;
		break;
	    }
	    break;
	}
	break;
    case 1:
	switch (M) {
	case 0:
	    tmp0 = T1;
	    T1 += tmp2;
	    tmp1 = T1 < tmp0;
	    switch (Q) {
	    case 0:
		if (tmp1)
		    SETQ;
		else
		    CLRQ;
		break;
	    case 1:
		if (tmp1 == 0)
		    SETQ;
		else
		    CLRQ;
		break;
	    }
	    break;
	case 1:
	    tmp0 = T1;
	    T1 -= tmp2;
	    tmp1 = T1 > tmp0;
	    switch (Q) {
	    case 0:
		if (tmp1 == 0)
		    SETQ;
		else
		    CLRQ;
		break;
	    case 1:
		if (tmp1)
		    SETQ;
		else
		    CLRQ;
		break;
	    }
	    break;
	}
	break;
    }
    if (Q == M)
	SETT;
    else
	CLRT;
    //printf("Output: T1=0x%08x M=%d Q=%d T=%d\n", T1, M, Q, T);
}

void helper_dmulsl_T0_T1()
{
    int64_t res;

    res = (int64_t) (int32_t) T0 *(int64_t) (int32_t) T1;
    env->mach = (res >> 32) & 0xffffffff;
    env->macl = res & 0xffffffff;
}

void helper_dmulul_T0_T1()
{
    uint64_t res;

    res = (uint64_t) (uint32_t) T0 *(uint64_t) (uint32_t) T1;
    env->mach = (res >> 32) & 0xffffffff;
    env->macl = res & 0xffffffff;
}

void helper_macl_T0_T1()
{
    int64_t res;

    res = ((uint64_t) env->mach << 32) | env->macl;
    res += (int64_t) (int32_t) T0 *(int64_t) (int32_t) T1;
    env->mach = (res >> 32) & 0xffffffff;
    env->macl = res & 0xffffffff;
    if (env->sr & SR_S) {
	if (res < 0)
	    env->mach |= 0xffff0000;
	else
	    env->mach &= 0x00007fff;
    }
}

void helper_macw_T0_T1()
{
    int64_t res;

    res = ((uint64_t) env->mach << 32) | env->macl;
    res += (int64_t) (int16_t) T0 *(int64_t) (int16_t) T1;
    env->mach = (res >> 32) & 0xffffffff;
    env->macl = res & 0xffffffff;
    if (env->sr & SR_S) {
	if (res < -0x80000000) {
	    env->mach = 1;
	    env->macl = 0x80000000;
	} else if (res > 0x000000007fffffff) {
	    env->mach = 1;
	    env->macl = 0x7fffffff;
	}
    }
}

void helper_negc_T0()
{
    uint32_t temp;

    temp = -T0;
    T0 = temp - (env->sr & SR_T);
    if (0 < temp)
	env->sr |= SR_T;
    else
	env->sr &= ~SR_T;
    if (temp < T0)
	env->sr |= SR_T;
}

void helper_subc_T0_T1()
{
    uint32_t tmp0, tmp1;

    tmp1 = T1 - T0;
    tmp0 = T1;
    T1 = tmp1 - (env->sr & SR_T);
    if (tmp0 < tmp1)
	env->sr |= SR_T;
    else
	env->sr &= ~SR_T;
    if (tmp1 < T1)
	env->sr |= SR_T;
}

void helper_subv_T0_T1()
{
    int32_t dest, src, ans;

    if ((int32_t) T1 >= 0)
	dest = 0;
    else
	dest = 1;
    if ((int32_t) T0 >= 0)
	src = 0;
    else
	src = 1;
    src += dest;
    T1 -= T0;
    if ((int32_t) T1 >= 0)
	ans = 0;
    else
	ans = 1;
    ans += dest;
    if (src == 1) {
	if (ans == 1)
	    env->sr |= SR_T;
	else
	    env->sr &= ~SR_T;
    } else
	env->sr &= ~SR_T;
}

void helper_rotcl(uint32_t * addr)
{
    uint32_t new;

    new = (*addr << 1) | (env->sr & SR_T);
    if (*addr & 0x80000000)
	env->sr |= SR_T;
    else
	env->sr &= ~SR_T;
    *addr = new;
}

void helper_rotcr(uint32_t * addr)
{
    uint32_t new;

    new = (*addr >> 1) | ((env->sr & SR_T) ? 0x80000000 : 0);
    if (*addr & 1)
	env->sr |= SR_T;
    else
	env->sr &= ~SR_T;
    *addr = new;
}