4 * Copyright (c) 2005 Samuel Tardieu
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, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
21 #include "exec/helper-proto.h"
22 #include "exec/exec-all.h"
23 #include "exec/cpu_ldst.h"
24 #include "fpu/softfloat.h"
26 #ifndef CONFIG_USER_ONLY
28 void superh_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
29 MMUAccessType access_type,
30 int mmu_idx, uintptr_t retaddr)
32 switch (access_type) {
35 cs->exception_index = 0x0e0;
38 cs->exception_index = 0x100;
41 cpu_loop_exit_restore(cs, retaddr);
44 void tlb_fill(CPUState *cs, target_ulong addr, int size,
45 MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
49 ret = superh_cpu_handle_mmu_fault(cs, addr, size, access_type, mmu_idx);
51 /* now we have a real cpu fault */
52 cpu_loop_exit_restore(cs, retaddr);
58 void helper_ldtlb(CPUSH4State *env)
60 #ifdef CONFIG_USER_ONLY
61 SuperHCPU *cpu = sh_env_get_cpu(env);
64 cpu_abort(CPU(cpu), "Unhandled ldtlb");
70 static inline void QEMU_NORETURN raise_exception(CPUSH4State *env, int index,
73 CPUState *cs = CPU(sh_env_get_cpu(env));
75 cs->exception_index = index;
76 cpu_loop_exit_restore(cs, retaddr);
79 void helper_raise_illegal_instruction(CPUSH4State *env)
81 raise_exception(env, 0x180, 0);
84 void helper_raise_slot_illegal_instruction(CPUSH4State *env)
86 raise_exception(env, 0x1a0, 0);
89 void helper_raise_fpu_disable(CPUSH4State *env)
91 raise_exception(env, 0x800, 0);
94 void helper_raise_slot_fpu_disable(CPUSH4State *env)
96 raise_exception(env, 0x820, 0);
99 void helper_debug(CPUSH4State *env)
101 raise_exception(env, EXCP_DEBUG, 0);
104 void helper_sleep(CPUSH4State *env)
106 CPUState *cs = CPU(sh_env_get_cpu(env));
110 raise_exception(env, EXCP_HLT, 0);
113 void helper_trapa(CPUSH4State *env, uint32_t tra)
116 raise_exception(env, 0x160, 0);
119 void helper_exclusive(CPUSH4State *env)
121 /* We do not want cpu_restore_state to run. */
122 cpu_loop_exit_atomic(ENV_GET_CPU(env), 0);
125 void helper_movcal(CPUSH4State *env, uint32_t address, uint32_t value)
127 if (cpu_sh4_is_cached (env, address))
129 memory_content *r = g_new(memory_content, 1);
131 r->address = address;
135 *(env->movcal_backup_tail) = r;
136 env->movcal_backup_tail = &(r->next);
140 void helper_discard_movcal_backup(CPUSH4State *env)
142 memory_content *current = env->movcal_backup;
146 memory_content *next = current->next;
148 env->movcal_backup = current = next;
150 env->movcal_backup_tail = &(env->movcal_backup);
154 void helper_ocbi(CPUSH4State *env, uint32_t address)
156 memory_content **current = &(env->movcal_backup);
159 uint32_t a = (*current)->address;
160 if ((a & ~0x1F) == (address & ~0x1F))
162 memory_content *next = (*current)->next;
163 cpu_stl_data(env, a, (*current)->value);
167 env->movcal_backup_tail = current;
177 void helper_macl(CPUSH4State *env, uint32_t arg0, uint32_t arg1)
181 res = ((uint64_t) env->mach << 32) | env->macl;
182 res += (int64_t) (int32_t) arg0 *(int64_t) (int32_t) arg1;
183 env->mach = (res >> 32) & 0xffffffff;
184 env->macl = res & 0xffffffff;
185 if (env->sr & (1u << SR_S)) {
187 env->mach |= 0xffff0000;
189 env->mach &= 0x00007fff;
193 void helper_macw(CPUSH4State *env, uint32_t arg0, uint32_t arg1)
197 res = ((uint64_t) env->mach << 32) | env->macl;
198 res += (int64_t) (int16_t) arg0 *(int64_t) (int16_t) arg1;
199 env->mach = (res >> 32) & 0xffffffff;
200 env->macl = res & 0xffffffff;
201 if (env->sr & (1u << SR_S)) {
202 if (res < -0x80000000) {
204 env->macl = 0x80000000;
205 } else if (res > 0x000000007fffffff) {
207 env->macl = 0x7fffffff;
212 void helper_ld_fpscr(CPUSH4State *env, uint32_t val)
214 env->fpscr = val & FPSCR_MASK;
215 if ((val & FPSCR_RM_MASK) == FPSCR_RM_ZERO) {
216 set_float_rounding_mode(float_round_to_zero, &env->fp_status);
218 set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
220 set_flush_to_zero((val & FPSCR_DN) != 0, &env->fp_status);
223 static void update_fpscr(CPUSH4State *env, uintptr_t retaddr)
225 int xcpt, cause, enable;
227 xcpt = get_float_exception_flags(&env->fp_status);
229 /* Clear the cause entries */
230 env->fpscr &= ~FPSCR_CAUSE_MASK;
232 if (unlikely(xcpt)) {
233 if (xcpt & float_flag_invalid) {
234 env->fpscr |= FPSCR_CAUSE_V;
236 if (xcpt & float_flag_divbyzero) {
237 env->fpscr |= FPSCR_CAUSE_Z;
239 if (xcpt & float_flag_overflow) {
240 env->fpscr |= FPSCR_CAUSE_O;
242 if (xcpt & float_flag_underflow) {
243 env->fpscr |= FPSCR_CAUSE_U;
245 if (xcpt & float_flag_inexact) {
246 env->fpscr |= FPSCR_CAUSE_I;
249 /* Accumulate in flag entries */
250 env->fpscr |= (env->fpscr & FPSCR_CAUSE_MASK)
251 >> (FPSCR_CAUSE_SHIFT - FPSCR_FLAG_SHIFT);
253 /* Generate an exception if enabled */
254 cause = (env->fpscr & FPSCR_CAUSE_MASK) >> FPSCR_CAUSE_SHIFT;
255 enable = (env->fpscr & FPSCR_ENABLE_MASK) >> FPSCR_ENABLE_SHIFT;
256 if (cause & enable) {
257 raise_exception(env, 0x120, retaddr);
262 float32 helper_fadd_FT(CPUSH4State *env, float32 t0, float32 t1)
264 set_float_exception_flags(0, &env->fp_status);
265 t0 = float32_add(t0, t1, &env->fp_status);
266 update_fpscr(env, GETPC());
270 float64 helper_fadd_DT(CPUSH4State *env, float64 t0, float64 t1)
272 set_float_exception_flags(0, &env->fp_status);
273 t0 = float64_add(t0, t1, &env->fp_status);
274 update_fpscr(env, GETPC());
278 uint32_t helper_fcmp_eq_FT(CPUSH4State *env, float32 t0, float32 t1)
282 set_float_exception_flags(0, &env->fp_status);
283 relation = float32_compare(t0, t1, &env->fp_status);
284 update_fpscr(env, GETPC());
285 return relation == float_relation_equal;
288 uint32_t helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
292 set_float_exception_flags(0, &env->fp_status);
293 relation = float64_compare(t0, t1, &env->fp_status);
294 update_fpscr(env, GETPC());
295 return relation == float_relation_equal;
298 uint32_t helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
302 set_float_exception_flags(0, &env->fp_status);
303 relation = float32_compare(t0, t1, &env->fp_status);
304 update_fpscr(env, GETPC());
305 return relation == float_relation_greater;
308 uint32_t helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
312 set_float_exception_flags(0, &env->fp_status);
313 relation = float64_compare(t0, t1, &env->fp_status);
314 update_fpscr(env, GETPC());
315 return relation == float_relation_greater;
318 float64 helper_fcnvsd_FT_DT(CPUSH4State *env, float32 t0)
321 set_float_exception_flags(0, &env->fp_status);
322 ret = float32_to_float64(t0, &env->fp_status);
323 update_fpscr(env, GETPC());
327 float32 helper_fcnvds_DT_FT(CPUSH4State *env, float64 t0)
330 set_float_exception_flags(0, &env->fp_status);
331 ret = float64_to_float32(t0, &env->fp_status);
332 update_fpscr(env, GETPC());
336 float32 helper_fdiv_FT(CPUSH4State *env, float32 t0, float32 t1)
338 set_float_exception_flags(0, &env->fp_status);
339 t0 = float32_div(t0, t1, &env->fp_status);
340 update_fpscr(env, GETPC());
344 float64 helper_fdiv_DT(CPUSH4State *env, float64 t0, float64 t1)
346 set_float_exception_flags(0, &env->fp_status);
347 t0 = float64_div(t0, t1, &env->fp_status);
348 update_fpscr(env, GETPC());
352 float32 helper_float_FT(CPUSH4State *env, uint32_t t0)
355 set_float_exception_flags(0, &env->fp_status);
356 ret = int32_to_float32(t0, &env->fp_status);
357 update_fpscr(env, GETPC());
361 float64 helper_float_DT(CPUSH4State *env, uint32_t t0)
364 set_float_exception_flags(0, &env->fp_status);
365 ret = int32_to_float64(t0, &env->fp_status);
366 update_fpscr(env, GETPC());
370 float32 helper_fmac_FT(CPUSH4State *env, float32 t0, float32 t1, float32 t2)
372 set_float_exception_flags(0, &env->fp_status);
373 t0 = float32_muladd(t0, t1, t2, 0, &env->fp_status);
374 update_fpscr(env, GETPC());
378 float32 helper_fmul_FT(CPUSH4State *env, float32 t0, float32 t1)
380 set_float_exception_flags(0, &env->fp_status);
381 t0 = float32_mul(t0, t1, &env->fp_status);
382 update_fpscr(env, GETPC());
386 float64 helper_fmul_DT(CPUSH4State *env, float64 t0, float64 t1)
388 set_float_exception_flags(0, &env->fp_status);
389 t0 = float64_mul(t0, t1, &env->fp_status);
390 update_fpscr(env, GETPC());
394 float32 helper_fsqrt_FT(CPUSH4State *env, float32 t0)
396 set_float_exception_flags(0, &env->fp_status);
397 t0 = float32_sqrt(t0, &env->fp_status);
398 update_fpscr(env, GETPC());
402 float64 helper_fsqrt_DT(CPUSH4State *env, float64 t0)
404 set_float_exception_flags(0, &env->fp_status);
405 t0 = float64_sqrt(t0, &env->fp_status);
406 update_fpscr(env, GETPC());
410 float32 helper_fsrra_FT(CPUSH4State *env, float32 t0)
412 set_float_exception_flags(0, &env->fp_status);
413 /* "Approximate" 1/sqrt(x) via actual computation. */
414 t0 = float32_sqrt(t0, &env->fp_status);
415 t0 = float32_div(float32_one, t0, &env->fp_status);
416 /* Since this is supposed to be an approximation, an imprecision
417 exception is required. One supposes this also follows the usual
418 IEEE rule that other exceptions take precidence. */
419 if (get_float_exception_flags(&env->fp_status) == 0) {
420 set_float_exception_flags(float_flag_inexact, &env->fp_status);
422 update_fpscr(env, GETPC());
426 float32 helper_fsub_FT(CPUSH4State *env, float32 t0, float32 t1)
428 set_float_exception_flags(0, &env->fp_status);
429 t0 = float32_sub(t0, t1, &env->fp_status);
430 update_fpscr(env, GETPC());
434 float64 helper_fsub_DT(CPUSH4State *env, float64 t0, float64 t1)
436 set_float_exception_flags(0, &env->fp_status);
437 t0 = float64_sub(t0, t1, &env->fp_status);
438 update_fpscr(env, GETPC());
442 uint32_t helper_ftrc_FT(CPUSH4State *env, float32 t0)
445 set_float_exception_flags(0, &env->fp_status);
446 ret = float32_to_int32_round_to_zero(t0, &env->fp_status);
447 update_fpscr(env, GETPC());
451 uint32_t helper_ftrc_DT(CPUSH4State *env, float64 t0)
454 set_float_exception_flags(0, &env->fp_status);
455 ret = float64_to_int32_round_to_zero(t0, &env->fp_status);
456 update_fpscr(env, GETPC());
460 void helper_fipr(CPUSH4State *env, uint32_t m, uint32_t n)
465 bank = (env->sr & FPSCR_FR) ? 16 : 0;
467 set_float_exception_flags(0, &env->fp_status);
469 for (i = 0 ; i < 4 ; i++) {
470 p = float32_mul(env->fregs[bank + m + i],
471 env->fregs[bank + n + i],
473 r = float32_add(r, p, &env->fp_status);
475 update_fpscr(env, GETPC());
477 env->fregs[bank + n + 3] = r;
480 void helper_ftrv(CPUSH4State *env, uint32_t n)
482 int bank_matrix, bank_vector;
487 bank_matrix = (env->sr & FPSCR_FR) ? 0 : 16;
488 bank_vector = (env->sr & FPSCR_FR) ? 16 : 0;
489 set_float_exception_flags(0, &env->fp_status);
490 for (i = 0 ; i < 4 ; i++) {
492 for (j = 0 ; j < 4 ; j++) {
493 p = float32_mul(env->fregs[bank_matrix + 4 * j + i],
494 env->fregs[bank_vector + j],
496 r[i] = float32_add(r[i], p, &env->fp_status);
499 update_fpscr(env, GETPC());
501 for (i = 0 ; i < 4 ; i++) {
502 env->fregs[bank_vector + i] = r[i];