2 Copyright (C) 1999, 2000, 2001, 2003, 2007 Free Software Foundation, Inc.
3 Contributed by Red Hat.
5 This file is part of the GNU simulators.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #define WANT_CPU frvbf
21 #define WANT_CPU_FRVBF
24 #include "targ-vals.h"
25 #include "cgen-engine.h"
30 #include "libiberty.h"
32 CGEN_ATTR_VALUE_ENUM_TYPE frv_current_fm_slot;
34 /* The semantic code invokes this for invalid (unrecognized) instructions. */
37 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
39 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
43 /* Process an address exception. */
46 frv_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
47 unsigned int map, int nr_bytes, address_word addr,
48 transfer_type transfer, sim_core_signals sig)
50 if (sig == sim_core_unaligned_signal)
52 if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400
53 || STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr450)
54 frv_queue_data_access_error_interrupt (current_cpu, addr);
56 frv_queue_mem_address_not_aligned_interrupt (current_cpu, addr);
60 sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr, transfer, sig);
64 frv_sim_engine_halt_hook (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia)
67 if (current_cpu != NULL)
68 CIA_SET (current_cpu, cia);
70 /* Invalidate the insn and data caches of all cpus. */
71 for (i = 0; i < MAX_NR_PROCESSORS; ++i)
73 current_cpu = STATE_CPU (sd, i);
74 frv_cache_invalidate_all (CPU_INSN_CACHE (current_cpu), 0);
75 frv_cache_invalidate_all (CPU_DATA_CACHE (current_cpu), 1);
80 /* Read/write functions for system call interface. */
83 syscall_read_mem (host_callback *cb, struct cb_syscall *sc,
84 unsigned long taddr, char *buf, int bytes)
86 SIM_DESC sd = (SIM_DESC) sc->p1;
87 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
89 frv_cache_invalidate_all (CPU_DATA_CACHE (cpu), 1);
90 return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes);
94 syscall_write_mem (host_callback *cb, struct cb_syscall *sc,
95 unsigned long taddr, const char *buf, int bytes)
97 SIM_DESC sd = (SIM_DESC) sc->p1;
98 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
100 frv_cache_invalidate_all (CPU_INSN_CACHE (cpu), 0);
101 frv_cache_invalidate_all (CPU_DATA_CACHE (cpu), 1);
102 return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes);
105 /* Handle TRA and TIRA insns. */
107 frv_itrap (SIM_CPU *current_cpu, PCADDR pc, USI base, SI offset)
109 SIM_DESC sd = CPU_STATE (current_cpu);
110 host_callback *cb = STATE_CALLBACK (sd);
111 USI num = ((base + offset) & 0x7f) + 0x80;
113 #ifdef SIM_HAVE_BREAKPOINTS
114 /* Check for breakpoints "owned" by the simulator first, regardless
116 if (num == TRAP_BREAKPOINT)
118 /* First try sim-break.c. If it's a breakpoint the simulator "owns"
119 it doesn't return. Otherwise it returns and let's us try. */
120 sim_handle_breakpoint (sd, current_cpu, pc);
125 if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
127 frv_queue_software_interrupt (current_cpu, num);
136 CB_SYSCALL_INIT (&s);
137 s.func = GET_H_GR (7);
138 s.arg1 = GET_H_GR (8);
139 s.arg2 = GET_H_GR (9);
140 s.arg3 = GET_H_GR (10);
142 if (s.func == TARGET_SYS_exit)
144 sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, s.arg1);
148 s.p2 = (PTR) current_cpu;
149 s.read_mem = syscall_read_mem;
150 s.write_mem = syscall_write_mem;
152 SET_H_GR (8, s.result);
153 SET_H_GR (9, s.result2);
154 SET_H_GR (10, s.errcode);
158 case TRAP_BREAKPOINT:
159 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
162 /* Add support for dumping registers, either at fixed traps, or all
163 unknown traps if configured with --enable-sim-trapdump. */
166 frv_queue_software_interrupt (current_cpu, num);
178 #if TRAPDUMP || (defined (TRAP_REGDUMP1)) || (defined (TRAP_REGDUMP2))
184 if (STATE_TEXT_SECTION (sd)
185 && pc >= STATE_TEXT_START (sd)
186 && pc < STATE_TEXT_END (sd))
188 const char *pc_filename = (const char *)0;
189 const char *pc_function = (const char *)0;
190 unsigned int pc_linenum = 0;
192 if (bfd_find_nearest_line (STATE_PROG_BFD (sd),
193 STATE_TEXT_SECTION (sd),
194 (struct bfd_symbol **) 0,
195 pc - STATE_TEXT_START (sd),
196 &pc_filename, &pc_function, &pc_linenum)
197 && (pc_function || pc_filename))
204 strcpy (p, pc_function);
209 char *q = (char *) strrchr (pc_filename, '/');
210 strcpy (p, (q) ? q+1 : pc_filename);
216 sprintf (p, " line %d", pc_linenum);
222 if ((p+1) - buf > sizeof (buf))
228 "\nRegister dump, pc = 0x%.8x%s, base = %u, offset = %d\n",
229 (unsigned)pc, buf, (unsigned)base, (int)offset);
231 for (i = 0; i < 64; i += 8)
233 long g0 = (long)GET_H_GR (i);
234 long g1 = (long)GET_H_GR (i+1);
235 long g2 = (long)GET_H_GR (i+2);
236 long g3 = (long)GET_H_GR (i+3);
237 long g4 = (long)GET_H_GR (i+4);
238 long g5 = (long)GET_H_GR (i+5);
239 long g6 = (long)GET_H_GR (i+6);
240 long g7 = (long)GET_H_GR (i+7);
242 if ((g0 | g1 | g2 | g3 | g4 | g5 | g6 | g7) != 0)
244 "\tgr%02d - gr%02d: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
245 i, i+7, g0, g1, g2, g3, g4, g5, g6, g7);
248 for (i = 0; i < 64; i += 8)
250 long f0 = (long)GET_H_FR (i);
251 long f1 = (long)GET_H_FR (i+1);
252 long f2 = (long)GET_H_FR (i+2);
253 long f3 = (long)GET_H_FR (i+3);
254 long f4 = (long)GET_H_FR (i+4);
255 long f5 = (long)GET_H_FR (i+5);
256 long f6 = (long)GET_H_FR (i+6);
257 long f7 = (long)GET_H_FR (i+7);
259 if ((f0 | f1 | f2 | f3 | f4 | f5 | f6 | f7) != 0)
261 "\tfr%02d - fr%02d: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
262 i, i+7, f0, f1, f2, f3, f4, f5, f6, f7);
266 "\tlr/lcr/cc/ccc: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
267 (long)GET_H_SPR (272),
268 (long)GET_H_SPR (273),
269 (long)GET_H_SPR (256),
270 (long)GET_H_SPR (263));
277 /* Handle the MTRAP insn. */
279 frv_mtrap (SIM_CPU *current_cpu)
281 SIM_DESC sd = CPU_STATE (current_cpu);
283 /* Check the status of media exceptions in MSR0. */
284 SI msr = GET_MSR (0);
285 if (GET_MSR_AOVF (msr) || GET_MSR_MTT (msr) && STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550)
286 frv_queue_program_interrupt (current_cpu, FRV_MP_EXCEPTION);
289 /* Handle the BREAK insn. */
291 frv_break (SIM_CPU *current_cpu)
294 SIM_DESC sd = CPU_STATE (current_cpu);
296 #ifdef SIM_HAVE_BREAKPOINTS
297 /* First try sim-break.c. If it's a breakpoint the simulator "owns"
298 it doesn't return. Otherwise it returns and let's us try. */
300 sim_handle_breakpoint (sd, current_cpu, pc);
304 if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
306 /* Invalidate the insn cache because the debugger will presumably
307 replace the breakpoint insn with the real one. */
308 #ifndef SIM_HAVE_BREAKPOINTS
311 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
314 frv_queue_break_interrupt (current_cpu);
317 /* Return from trap. */
319 frv_rett (SIM_CPU *current_cpu, PCADDR pc, BI debug_field)
322 /* if (normal running mode and debug_field==0
326 else if (debug running mode and debug_field==1)
330 change to normal running mode
332 int psr_s = GET_H_PSR_S ();
333 int psr_et = GET_H_PSR_ET ();
335 /* Check for exceptions in the priority order listed in the FRV Architecture
339 /* Halt if PSR.ET is not set. See chapter 6 of the LSI. */
342 SIM_DESC sd = CPU_STATE (current_cpu);
343 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
346 /* privileged_instruction interrupt will have already been queued by
347 frv_detect_insn_access_interrupts. */
352 /* Halt if PSR.S is set. See chapter 6 of the LSI. */
355 SIM_DESC sd = CPU_STATE (current_cpu);
356 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
359 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
362 else if (! CPU_DEBUG_STATE (current_cpu) && debug_field == 0)
364 USI psr = GET_PSR ();
365 /* Return from normal running state. */
366 new_pc = GET_H_SPR (H_SPR_PCSR);
368 SET_PSR_S (psr, GET_PSR_PS (psr));
369 sim_queue_fn_si_write (current_cpu, frvbf_h_spr_set, H_SPR_PSR, psr);
371 else if (CPU_DEBUG_STATE (current_cpu) && debug_field == 1)
373 USI psr = GET_PSR ();
374 /* Return from debug state. */
375 new_pc = GET_H_SPR (H_SPR_BPCSR);
376 SET_PSR_ET (psr, GET_H_BPSR_BET ());
377 SET_PSR_S (psr, GET_H_BPSR_BS ());
378 sim_queue_fn_si_write (current_cpu, frvbf_h_spr_set, H_SPR_PSR, psr);
379 CPU_DEBUG_STATE (current_cpu) = 0;
387 /* Functions for handling non-excepting instruction side effects. */
388 static SI next_available_nesr (SIM_CPU *current_cpu, SI current_index)
390 FRV_REGISTER_CONTROL *control = CPU_REGISTER_CONTROL (current_cpu);
391 if (control->spr[H_SPR_NECR].implemented)
394 USI necr = GET_NECR ();
396 /* See if any NESRs are implemented. First need to check the validity of
398 if (! GET_NECR_VALID (necr))
401 limit = GET_NECR_NEN (necr);
402 for (++current_index; current_index < limit; ++current_index)
404 SI nesr = GET_NESR (current_index);
405 if (! GET_NESR_VALID (nesr))
406 return current_index;
412 static SI next_valid_nesr (SIM_CPU *current_cpu, SI current_index)
414 FRV_REGISTER_CONTROL *control = CPU_REGISTER_CONTROL (current_cpu);
415 if (control->spr[H_SPR_NECR].implemented)
418 USI necr = GET_NECR ();
420 /* See if any NESRs are implemented. First need to check the validity of
422 if (! GET_NECR_VALID (necr))
425 limit = GET_NECR_NEN (necr);
426 for (++current_index; current_index < limit; ++current_index)
428 SI nesr = GET_NESR (current_index);
429 if (GET_NESR_VALID (nesr))
430 return current_index;
437 frvbf_check_non_excepting_load (
438 SIM_CPU *current_cpu, SI base_index, SI disp_index, SI target_index,
439 SI immediate_disp, QI data_size, BI is_float
442 BI rc = 1; /* perform the load. */
443 SIM_DESC sd = CPU_STATE (current_cpu);
453 FRV_REGISTER_CONTROL *control;
455 SI address = GET_H_GR (base_index);
457 address += GET_H_GR (disp_index);
459 address += immediate_disp;
461 /* Check for interrupt factors. */
479 if (target_index & 1)
485 if (target_index & 3)
490 IADDR pc = GET_H_PC ();
491 sim_engine_abort (sd, current_cpu, pc,
492 "check_non_excepting_load: Incorrect data_size\n");
497 control = CPU_REGISTER_CONTROL (current_cpu);
498 if (control->spr[H_SPR_NECR].implemented)
501 do_elos = GET_NECR_VALID (necr) && GET_NECR_ELOS (necr);
506 /* NECR, NESR, NEEAR are only implemented for the full frv machine. */
509 ne_index = next_available_nesr (current_cpu, NO_NESR);
510 if (ne_index == NO_NESR)
512 IADDR pc = GET_H_PC ();
513 sim_engine_abort (sd, current_cpu, pc,
514 "No available NESR register\n");
517 /* Fill in the basic fields of the NESR. */
518 nesr = GET_NESR (ne_index);
519 SET_NESR_VALID (nesr);
521 SET_NESR_DRN (nesr, target_index);
522 SET_NESR_SIZE (nesr, data_size);
523 SET_NESR_NEAN (nesr, ne_index);
527 CLEAR_NESR_FR (nesr);
529 /* Set the corresponding NEEAR. */
530 SET_NEEAR (ne_index, address);
532 SET_NESR_DAEC (nesr, 0);
533 SET_NESR_REC (nesr, 0);
534 SET_NESR_EC (nesr, 0);
537 /* Set the NE flag corresponding to the target register if an interrupt
539 daec is not checked here yet, but is declared for future reference. */
541 NE_base = H_SPR_FNER0;
543 NE_base = H_SPR_GNER0;
545 GET_NE_FLAGS (NE_flags, NE_base);
548 SET_NE_FLAG (NE_flags, target_index);
550 SET_NESR_REC (nesr, NESR_REGISTER_NOT_ALIGNED);
555 SET_NE_FLAG (NE_flags, target_index);
557 SET_NESR_EC (nesr, NESR_MEM_ADDRESS_NOT_ALIGNED);
561 SET_NESR (ne_index, nesr);
563 /* If no interrupt factor was detected then set the NE flag on the
564 target register if the NE flag on one of the input registers
566 if (! rec && ! ec && ! daec)
568 BI ne_flag = GET_NE_FLAG (NE_flags, base_index);
570 ne_flag |= GET_NE_FLAG (NE_flags, disp_index);
573 SET_NE_FLAG (NE_flags, target_index);
574 rc = 0; /* Do not perform the load. */
577 CLEAR_NE_FLAG (NE_flags, target_index);
580 SET_NE_FLAGS (NE_base, NE_flags);
582 return rc; /* perform the load? */
585 /* Record state for media exception: media_cr_not_aligned. */
587 frvbf_media_cr_not_aligned (SIM_CPU *current_cpu)
589 SIM_DESC sd = CPU_STATE (current_cpu);
591 /* On some machines this generates an illegal_instruction interrupt. */
592 switch (STATE_ARCHITECTURE (sd)->mach)
594 /* Note: there is a discrepancy between V2.2 of the FR400
595 instruction manual and the various FR4xx LSI specs. The former
596 claims that unaligned registers cause an mp_exception while the
597 latter say it's an illegal_instruction. The LSI specs appear
598 to be correct since MTT is fixed at 1. */
602 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
605 frv_set_mp_exception_registers (current_cpu, MTT_CR_NOT_ALIGNED, 0);
610 /* Record state for media exception: media_acc_not_aligned. */
612 frvbf_media_acc_not_aligned (SIM_CPU *current_cpu)
614 SIM_DESC sd = CPU_STATE (current_cpu);
616 /* On some machines this generates an illegal_instruction interrupt. */
617 switch (STATE_ARCHITECTURE (sd)->mach)
619 /* See comment in frvbf_cr_not_aligned(). */
623 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
626 frv_set_mp_exception_registers (current_cpu, MTT_ACC_NOT_ALIGNED, 0);
631 /* Record state for media exception: media_register_not_aligned. */
633 frvbf_media_register_not_aligned (SIM_CPU *current_cpu)
635 SIM_DESC sd = CPU_STATE (current_cpu);
637 /* On some machines this generates an illegal_instruction interrupt. */
638 switch (STATE_ARCHITECTURE (sd)->mach)
640 /* See comment in frvbf_cr_not_aligned(). */
644 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
647 frv_set_mp_exception_registers (current_cpu, MTT_INVALID_FR, 0);
652 /* Record state for media exception: media_overflow. */
654 frvbf_media_overflow (SIM_CPU *current_cpu, int sie)
656 frv_set_mp_exception_registers (current_cpu, MTT_OVERFLOW, sie);
659 /* Queue a division exception. */
661 frvbf_division_exception (SIM_CPU *current_cpu, enum frv_dtt dtt,
662 int target_index, int non_excepting)
664 /* If there was an overflow and it is masked, then record it in
666 USI isr = GET_ISR ();
667 if ((dtt & FRV_DTT_OVERFLOW) && GET_ISR_EDE (isr))
669 dtt &= ~FRV_DTT_OVERFLOW;
673 if (dtt != FRV_DTT_NO_EXCEPTION)
677 /* Non excepting instruction, simply set the NE flag for the target
680 GET_NE_FLAGS (NE_flags, H_SPR_GNER0);
681 SET_NE_FLAG (NE_flags, target_index);
682 SET_NE_FLAGS (H_SPR_GNER0, NE_flags);
685 frv_queue_division_exception_interrupt (current_cpu, dtt);
691 frvbf_check_recovering_store (
692 SIM_CPU *current_cpu, PCADDR address, SI regno, int size, int is_float
695 FRV_CACHE *cache = CPU_DATA_CACHE (current_cpu);
698 CPU_RSTR_INVALIDATE(current_cpu) = 0;
700 for (reg_ix = next_valid_nesr (current_cpu, NO_NESR);
702 reg_ix = next_valid_nesr (current_cpu, reg_ix))
704 if (address == GET_H_SPR (H_SPR_NEEAR0 + reg_ix))
706 SI nesr = GET_NESR (reg_ix);
707 int nesr_drn = GET_NESR_DRN (nesr);
708 BI nesr_fr = GET_NESR_FR (nesr);
711 /* Invalidate cache block containing this address.
712 If we need to count cycles, then the cache operation will be
713 initiated from the model profiling functions.
714 See frvbf_model_.... */
717 CPU_RSTR_INVALIDATE(current_cpu) = 1;
718 CPU_LOAD_ADDRESS (current_cpu) = address;
721 frv_cache_invalidate (cache, address, 1/* flush */);
723 /* Copy the stored value to the register indicated by NESR.DRN. */
724 for (remain = size; remain > 0; remain -= 4)
729 value = GET_H_FR (regno);
731 value = GET_H_GR (regno);
746 sim_queue_fn_sf_write (current_cpu, frvbf_h_fr_set, nesr_drn,
749 sim_queue_fn_si_write (current_cpu, frvbf_h_gr_set, nesr_drn,
755 break; /* Only consider the first matching register. */
757 } /* loop over active neear registers. */
761 frvbf_check_acc_range (SIM_CPU *current_cpu, SI regno)
763 /* Only applicable to fr550 */
764 SIM_DESC sd = CPU_STATE (current_cpu);
765 if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550)
768 /* On the fr550, media insns in slots 0 and 2 can only access
769 accumulators acc0-acc3. Insns in slots 1 and 3 can only access
770 accumulators acc4-acc7 */
771 switch (frv_current_fm_slot)
776 return 1; /* all is ok */
781 return 1; /* all is ok */
785 /* The specified accumulator is out of range. Queue an illegal_instruction
787 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
792 frvbf_check_swap_address (SIM_CPU *current_cpu, SI address)
794 /* Only applicable to fr550 */
795 SIM_DESC sd = CPU_STATE (current_cpu);
796 if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_fr550)
799 /* Adress must be aligned on a word boundary. */
801 frv_queue_data_access_exception_interrupt (current_cpu);
805 clear_nesr_neear (SIM_CPU *current_cpu, SI target_index, BI is_float)
809 /* Only implemented for full frv. */
810 SIM_DESC sd = CPU_STATE (current_cpu);
811 if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_frv)
814 /* Clear the appropriate NESR and NEEAR registers. */
815 for (reg_ix = next_valid_nesr (current_cpu, NO_NESR);
817 reg_ix = next_valid_nesr (current_cpu, reg_ix))
820 /* The register is available, now check if it is active. */
821 nesr = GET_NESR (reg_ix);
822 if (GET_NESR_FR (nesr) == is_float)
824 if (target_index < 0 || GET_NESR_DRN (nesr) == target_index)
826 SET_NESR (reg_ix, 0);
827 SET_NEEAR (reg_ix, 0);
835 SIM_CPU *current_cpu,
845 GET_NE_FLAGS (NE_flags, NE_base);
846 if (target_index >= 0)
847 CLEAR_NE_FLAG (NE_flags, target_index);
855 SET_NE_FLAGS (NE_base, NE_flags);
858 /* Return 1 if the given register is available, 0 otherwise. TARGET_INDEX==-1
859 means to check for any register available. */
861 which_registers_available (
862 SIM_CPU *current_cpu, int *hi_available, int *lo_available, int is_float
866 frv_fr_registers_available (current_cpu, hi_available, lo_available);
868 frv_gr_registers_available (current_cpu, hi_available, lo_available);
872 frvbf_clear_ne_flags (SIM_CPU *current_cpu, SI target_index, BI is_float)
879 FRV_REGISTER_CONTROL *control;
881 /* Check for availability of the target register(s). */
882 which_registers_available (current_cpu, & hi_available, & lo_available,
885 /* Check to make sure that the target register is available. */
886 if (! frv_check_register_access (current_cpu, target_index,
887 hi_available, lo_available))
890 /* Determine whether we're working with GR or FR registers. */
892 NE_base = H_SPR_FNER0;
894 NE_base = H_SPR_GNER0;
896 /* Always clear the appropriate NE flags. */
897 clear_ne_flags (current_cpu, target_index, hi_available, lo_available,
900 /* Clear the appropriate NESR and NEEAR registers. */
901 control = CPU_REGISTER_CONTROL (current_cpu);
902 if (control->spr[H_SPR_NECR].implemented)
905 if (GET_NECR_VALID (necr) && GET_NECR_ELOS (necr))
906 clear_nesr_neear (current_cpu, target_index, is_float);
911 frvbf_commit (SIM_CPU *current_cpu, SI target_index, BI is_float)
920 FRV_REGISTER_CONTROL *control;
922 /* Check for availability of the target register(s). */
923 which_registers_available (current_cpu, & hi_available, & lo_available,
926 /* Check to make sure that the target register is available. */
927 if (! frv_check_register_access (current_cpu, target_index,
928 hi_available, lo_available))
931 /* Determine whether we're working with GR or FR registers. */
933 NE_base = H_SPR_FNER0;
935 NE_base = H_SPR_GNER0;
937 /* Determine whether a ne exception is pending. */
938 GET_NE_FLAGS (NE_flags, NE_base);
939 if (target_index >= 0)
940 NE_flag = GET_NE_FLAG (NE_flags, target_index);
944 hi_available && NE_flags[0] != 0 || lo_available && NE_flags[1] != 0;
947 /* Always clear the appropriate NE flags. */
948 clear_ne_flags (current_cpu, target_index, hi_available, lo_available,
951 control = CPU_REGISTER_CONTROL (current_cpu);
952 if (control->spr[H_SPR_NECR].implemented)
955 if (GET_NECR_VALID (necr) && GET_NECR_ELOS (necr) && NE_flag)
957 /* Clear the appropriate NESR and NEEAR registers. */
958 clear_nesr_neear (current_cpu, target_index, is_float);
959 frv_queue_program_interrupt (current_cpu, FRV_COMMIT_EXCEPTION);
964 /* Generate the appropriate fp_exception(s) based on the given status code. */
966 frvbf_fpu_error (CGEN_FPU* fpu, int status)
968 struct frv_fp_exception_info fp_info = {
969 FSR_NO_EXCEPTION, FTT_IEEE_754_EXCEPTION
973 (sim_fpu_status_invalid_snan |
974 sim_fpu_status_invalid_qnan |
975 sim_fpu_status_invalid_isi |
976 sim_fpu_status_invalid_idi |
977 sim_fpu_status_invalid_zdz |
978 sim_fpu_status_invalid_imz |
979 sim_fpu_status_invalid_cvi |
980 sim_fpu_status_invalid_cmp |
981 sim_fpu_status_invalid_sqrt))
982 fp_info.fsr_mask |= FSR_INVALID_OPERATION;
984 if (status & sim_fpu_status_invalid_div0)
985 fp_info.fsr_mask |= FSR_DIVISION_BY_ZERO;
987 if (status & sim_fpu_status_inexact)
988 fp_info.fsr_mask |= FSR_INEXACT;
990 if (status & sim_fpu_status_overflow)
991 fp_info.fsr_mask |= FSR_OVERFLOW;
993 if (status & sim_fpu_status_underflow)
994 fp_info.fsr_mask |= FSR_UNDERFLOW;
996 if (status & sim_fpu_status_denorm)
998 fp_info.fsr_mask |= FSR_DENORMAL_INPUT;
999 fp_info.ftt = FTT_DENORMAL_INPUT;
1002 if (fp_info.fsr_mask != FSR_NO_EXCEPTION)
1004 SIM_CPU *current_cpu = (SIM_CPU *)fpu->owner;
1005 frv_queue_fp_exception_interrupt (current_cpu, & fp_info);