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git.proxmox.com Git - mirror_qemu.git/blob - target-ppc/op_helper.c
2 * PPC emulation helpers for qemu.
4 * Copyright (c) 2003 Jocelyn Mayer
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #define MEMSUFFIX _raw
24 #include "op_helper_mem.h"
25 #if !defined(CONFIG_USER_ONLY)
26 #define MEMSUFFIX _user
27 #include "op_helper_mem.h"
28 #define MEMSUFFIX _kernel
29 #include "op_helper_mem.h"
32 /*****************************************************************************/
33 /* Exceptions processing helpers */
34 void do_queue_exception_err (uint32_t exception
, int error_code
)
36 /* Queue real PPC exceptions */
37 if (exception
< EXCP_PPC_MAX
) {
38 env
->exceptions
|= 1 << exception
;
39 env
->errors
[exception
] = error_code
;
41 /* Preserve compatibility with qemu core */
43 env
->exception_index
= exception
;
44 env
->error_code
= error_code
;
48 void do_queue_exception (uint32_t exception
)
50 do_queue_exception_err(exception
, 0);
53 void do_check_exception_state (void)
55 if ((env
->exceptions
& 1) == 1 || check_exception_state(env
)) {
56 env
->exceptions
&= ~1;
61 /*****************************************************************************/
62 /* Helpers for "fat" micro operations */
63 /* Special registers load and store */
64 void do_load_cr (void)
66 T0
= (env
->crf
[0] << 28) |
76 void do_store_cr (uint32_t mask
)
80 for (i
= 0, sh
= 7; i
< 8; i
++, sh
--) {
82 env
->crf
[i
] = (T0
>> (sh
* 4)) & 0xF;
86 void do_load_xer (void)
88 T0
= (xer_so
<< XER_SO
) |
94 void do_store_xer (void)
96 xer_so
= (T0
>> XER_SO
) & 0x01;
97 xer_ov
= (T0
>> XER_OV
) & 0x01;
98 xer_ca
= (T0
>> XER_CA
) & 0x01;
99 xer_bc
= (T0
>> XER_BC
) & 0x1f;
102 void do_load_msr (void)
104 T0
= (msr_pow
<< MSR_POW
) |
105 (msr_ile
<< MSR_ILE
) |
110 (msr_fe0
<< MSR_FE0
) |
113 (msr_fe1
<< MSR_FE1
) |
121 void do_store_msr (void)
123 if (((T0
>> MSR_IR
) & 0x01) != msr_ir
||
124 ((T0
>> MSR_DR
) & 0x01) != msr_dr
) {
125 /* Flush all tlb when changing translation mode or privilege level */
129 if ((T0
>> MSR_IP
) & 0x01) {
130 printf("Halting CPU. Stop emulation\n");
131 do_queue_exception(EXCP_HLT
);
135 msr_pow
= (T0
>> MSR_POW
) & 0x03;
136 msr_ile
= (T0
>> MSR_ILE
) & 0x01;
137 msr_ee
= (T0
>> MSR_EE
) & 0x01;
138 msr_pr
= (T0
>> MSR_PR
) & 0x01;
139 msr_fp
= (T0
>> MSR_FP
) & 0x01;
140 msr_me
= (T0
>> MSR_ME
) & 0x01;
141 msr_fe0
= (T0
>> MSR_FE0
) & 0x01;
142 msr_se
= (T0
>> MSR_SE
) & 0x01;
143 msr_be
= (T0
>> MSR_BE
) & 0x01;
144 msr_fe1
= (T0
>> MSR_FE1
) & 0x01;
145 msr_ip
= (T0
>> MSR_IP
) & 0x01;
146 msr_ir
= (T0
>> MSR_IR
) & 0x01;
147 msr_dr
= (T0
>> MSR_DR
) & 0x01;
148 msr_ri
= (T0
>> MSR_RI
) & 0x01;
149 msr_le
= (T0
>> MSR_LE
) & 0x01;
152 /* shift right arithmetic helper */
159 ret
= (-1) * (T0
>> 31);
163 ret
= (int32_t)T0
>> (T1
& 0x1f);
164 if (ret
< 0 && ((int32_t)T0
& ((1 << T1
) - 1)) != 0)
170 /* Floating point operations helpers */
171 void do_load_fpscr (void)
173 /* The 32 MSB of the target fpr are undefined.
186 for (i
= 0; i
< 8; i
++)
187 u
.s
.u
[1] |= env
->fpscr
[i
] << (4 * i
);
191 void do_store_fpscr (uint32_t mask
)
194 * We use only the 32 LSB of the incoming fpr
206 env
->fpscr
[0] = (env
->fpscr
[0] & 0x9) | ((u
.s
.u
[1] >> 28) & ~0x9);
207 for (i
= 1; i
< 7; i
++) {
208 if (mask
& (1 << (7 - i
)))
209 env
->fpscr
[i
] = (u
.s
.u
[1] >> (4 * (7 - i
))) & 0xF;
211 /* TODO: update FEX & VX */
212 /* Set rounding mode */
213 switch (env
->fpscr
[0] & 0x3) {
215 /* Best approximation (round to nearest) */
216 fesetround(FE_TONEAREST
);
219 /* Smaller magnitude (round toward zero) */
220 fesetround(FE_TOWARDZERO
);
223 /* Round toward +infinite */
224 fesetround(FE_UPWARD
);
227 /* Round toward -infinite */
228 fesetround(FE_DOWNWARD
);
240 if (FT0
> (double)0x7FFFFFFF)
241 p
->i
= 0x7FFFFFFFULL
<< 32;
242 else if (FT0
< -(double)0x80000000)
243 p
->i
= 0x80000000ULL
<< 32;
246 p
->i
|= (uint32_t)FT0
;
250 void do_fctiwz (void)
256 int cround
= fegetround();
258 fesetround(FE_TOWARDZERO
);
259 if (FT0
> (double)0x7FFFFFFF)
260 p
->i
= 0x7FFFFFFFULL
<< 32;
261 else if (FT0
< -(double)0x80000000)
262 p
->i
= 0x80000000ULL
<< 32;
265 p
->i
|= (uint32_t)FT0
;
275 void do_fsqrts (void)
277 FT0
= (float)sqrt((float)FT0
);
285 void do_fsqrte (void)
287 FT0
= 1.0 / sqrt(FT0
);
300 env
->fpscr
[4] &= ~0x1;
301 if (isnan(FT0
) || isnan(FT1
)) {
303 env
->fpscr
[4] |= 0x1;
304 env
->fpscr
[6] |= 0x1;
305 } else if (FT0
< FT1
) {
307 } else if (FT0
> FT1
) {
317 env
->fpscr
[4] &= ~0x1;
318 if (isnan(FT0
) || isnan(FT1
)) {
320 env
->fpscr
[4] |= 0x1;
321 /* I don't know how to test "quiet" nan... */
322 if (0 /* || ! quiet_nan(...) */) {
323 env
->fpscr
[6] |= 0x1;
324 if (!(env
->fpscr
[1] & 0x8))
325 env
->fpscr
[4] |= 0x8;
327 env
->fpscr
[4] |= 0x8;
329 } else if (FT0
< FT1
) {
331 } else if (FT0
> FT1
) {
349 /* Instruction cache invalidation helper */
350 #define ICACHE_LINE_SIZE 32
354 /* Invalidate one cache line */
355 T0
&= ~(ICACHE_LINE_SIZE
- 1);
356 tb_invalidate_page_range(T0
, T0
+ ICACHE_LINE_SIZE
);
359 /* TLB invalidation helpers */
367 tlb_flush_page(env
, T0
);
370 /*****************************************************************************/
371 /* Special helpers for debug */
374 void dump_state (void)
376 cpu_ppc_dump_state(env
, stdout
, 0);
382 printf("Return from interrupt %d => 0x%08x\n", pos
, env
->nip
);
383 // cpu_ppc_dump_state(env, stdout, 0);
387 void dump_store_sr (int srnum
)
390 printf("%s: reg=%d 0x%08x\n", __func__
, srnum
, T0
);
394 static void _dump_store_bat (char ID
, int ul
, int nr
)
396 printf("Set %cBAT%d%c to 0x%08x (0x%08x)\n",
397 ID
, nr
, ul
== 0 ? 'u' : 'l', T0
, env
->nip
);
400 void dump_store_ibat (int ul
, int nr
)
402 _dump_store_bat('I', ul
, nr
);
405 void dump_store_dbat (int ul
, int nr
)
407 _dump_store_bat('D', ul
, nr
);
410 void dump_store_tb (int ul
)
412 printf("Set TB%c to 0x%08x\n", ul
== 0 ? 'L' : 'U', T0
);
415 void dump_update_tb(uint32_t param
)
418 printf("Update TB: 0x%08x + %d => 0x%08x\n", T1
, param
, T0
);