2 Copyright (C) 1999, 2000, 2001 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 2, or (at your option)
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 along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #define WANT_CPU frvbf
22 #define WANT_CPU_FRVBF
25 #include "targ-vals.h"
26 #include "cgen-engine.h"
31 #include "libiberty.h"
33 /* The semantic code invokes this for invalid (unrecognized) instructions. */
36 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
38 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
42 /* Process an address exception. */
45 frv_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
46 unsigned int map, int nr_bytes, address_word addr,
47 transfer_type transfer, sim_core_signals sig)
49 if (sig == sim_core_unaligned_signal)
51 if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400)
52 frv_queue_data_access_error_interrupt (current_cpu, addr);
54 frv_queue_mem_address_not_aligned_interrupt (current_cpu, addr);
58 sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr, transfer, sig);
62 frv_sim_engine_halt_hook (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia)
65 if (current_cpu != NULL)
66 CIA_SET (current_cpu, cia);
68 /* Invalidate the insn and data caches of all cpus. */
69 for (i = 0; i < MAX_NR_PROCESSORS; ++i)
71 current_cpu = STATE_CPU (sd, i);
72 frv_cache_invalidate_all (CPU_INSN_CACHE (current_cpu), 0);
73 frv_cache_invalidate_all (CPU_DATA_CACHE (current_cpu), 1);
78 /* Read/write functions for system call interface. */
81 syscall_read_mem (host_callback *cb, struct cb_syscall *sc,
82 unsigned long taddr, char *buf, int bytes)
84 SIM_DESC sd = (SIM_DESC) sc->p1;
85 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
87 frv_cache_invalidate_all (CPU_DATA_CACHE (cpu), 1);
88 return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes);
92 syscall_write_mem (host_callback *cb, struct cb_syscall *sc,
93 unsigned long taddr, const char *buf, int bytes)
95 SIM_DESC sd = (SIM_DESC) sc->p1;
96 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
98 frv_cache_invalidate_all (CPU_INSN_CACHE (cpu), 0);
99 frv_cache_invalidate_all (CPU_DATA_CACHE (cpu), 1);
100 return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes);
103 /* Handle TRA and TIRA insns. */
105 frv_itrap (SIM_CPU *current_cpu, PCADDR pc, USI base, SI offset)
107 SIM_DESC sd = CPU_STATE (current_cpu);
108 host_callback *cb = STATE_CALLBACK (sd);
109 USI num = ((base + offset) & 0x7f) + 0x80;
111 #ifdef SIM_HAVE_BREAKPOINTS
112 /* Check for breakpoints "owned" by the simulator first, regardless
114 if (num == TRAP_BREAKPOINT)
116 /* First try sim-break.c. If it's a breakpoint the simulator "owns"
117 it doesn't return. Otherwise it returns and let's us try. */
118 sim_handle_breakpoint (sd, current_cpu, pc);
123 if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
125 frv_queue_software_interrupt (current_cpu, num);
134 CB_SYSCALL_INIT (&s);
135 s.func = GET_H_GR (7);
136 s.arg1 = GET_H_GR (8);
137 s.arg2 = GET_H_GR (9);
138 s.arg3 = GET_H_GR (10);
140 if (s.func == TARGET_SYS_exit)
142 sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, s.arg1);
146 s.p2 = (PTR) current_cpu;
147 s.read_mem = syscall_read_mem;
148 s.write_mem = syscall_write_mem;
150 SET_H_GR (8, s.result);
151 SET_H_GR (9, s.result2);
152 SET_H_GR (10, s.errcode);
156 case TRAP_BREAKPOINT:
157 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
160 /* Add support for dumping registers, either at fixed traps, or all
161 unknown traps if configured with --enable-sim-trapdump. */
164 frv_queue_software_interrupt (current_cpu, num);
176 #if TRAPDUMP || (defined (TRAP_REGDUMP1)) || (defined (TRAP_REGDUMP2))
182 if (STATE_TEXT_SECTION (sd)
183 && pc >= STATE_TEXT_START (sd)
184 && pc < STATE_TEXT_END (sd))
186 const char *pc_filename = (const char *)0;
187 const char *pc_function = (const char *)0;
188 unsigned int pc_linenum = 0;
190 if (bfd_find_nearest_line (STATE_PROG_BFD (sd),
191 STATE_TEXT_SECTION (sd),
192 (struct symbol_cache_entry **) 0,
193 pc - STATE_TEXT_START (sd),
194 &pc_filename, &pc_function, &pc_linenum)
195 && (pc_function || pc_filename))
202 strcpy (p, pc_function);
207 char *q = (char *) strrchr (pc_filename, '/');
208 strcpy (p, (q) ? q+1 : pc_filename);
214 sprintf (p, " line %d", pc_linenum);
220 if ((p+1) - buf > sizeof (buf))
226 "\nRegister dump, pc = 0x%.8x%s, base = %u, offset = %d\n",
227 (unsigned)pc, buf, (unsigned)base, (int)offset);
229 for (i = 0; i < 64; i += 8)
231 long g0 = (long)GET_H_GR (i);
232 long g1 = (long)GET_H_GR (i+1);
233 long g2 = (long)GET_H_GR (i+2);
234 long g3 = (long)GET_H_GR (i+3);
235 long g4 = (long)GET_H_GR (i+4);
236 long g5 = (long)GET_H_GR (i+5);
237 long g6 = (long)GET_H_GR (i+6);
238 long g7 = (long)GET_H_GR (i+7);
240 if ((g0 | g1 | g2 | g3 | g4 | g5 | g6 | g7) != 0)
242 "\tgr%02d - gr%02d: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
243 i, i+7, g0, g1, g2, g3, g4, g5, g6, g7);
246 for (i = 0; i < 64; i += 8)
248 long f0 = (long)GET_H_FR (i);
249 long f1 = (long)GET_H_FR (i+1);
250 long f2 = (long)GET_H_FR (i+2);
251 long f3 = (long)GET_H_FR (i+3);
252 long f4 = (long)GET_H_FR (i+4);
253 long f5 = (long)GET_H_FR (i+5);
254 long f6 = (long)GET_H_FR (i+6);
255 long f7 = (long)GET_H_FR (i+7);
257 if ((f0 | f1 | f2 | f3 | f4 | f5 | f6 | f7) != 0)
259 "\tfr%02d - fr%02d: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
260 i, i+7, f0, f1, f2, f3, f4, f5, f6, f7);
264 "\tlr/lcr/cc/ccc: 0x%.8lx 0x%.8lx 0x%.8lx 0x%.8lx\n",
265 (long)GET_H_SPR (272),
266 (long)GET_H_SPR (273),
267 (long)GET_H_SPR (256),
268 (long)GET_H_SPR (263));
275 /* Handle the MTRAP insn. */
277 frv_mtrap (SIM_CPU *current_cpu)
279 /* Check the status of media exceptions in MSR0. */
280 SI msr = GET_MSR (0);
281 if (GET_MSR_AOVF (msr) || GET_MSR_MTT (msr))
282 frv_queue_program_interrupt (current_cpu, FRV_MP_EXCEPTION);
285 /* Handle the BREAK insn. */
287 frv_break (SIM_CPU *current_cpu)
290 SIM_DESC sd = CPU_STATE (current_cpu);
292 #ifdef SIM_HAVE_BREAKPOINTS
293 /* First try sim-break.c. If it's a breakpoint the simulator "owns"
294 it doesn't return. Otherwise it returns and let's us try. */
296 sim_handle_breakpoint (sd, current_cpu, pc);
300 if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
302 /* Invalidate the insn cache because the debugger will presumably
303 replace the breakpoint insn with the real one. */
304 #ifndef SIM_HAVE_BREAKPOINTS
307 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
310 frv_queue_break_interrupt (current_cpu);
313 /* Return from trap. */
315 frv_rett (SIM_CPU *current_cpu, PCADDR pc, BI debug_field)
318 /* if (normal running mode and debug_field==0
322 else if (debug running mode and debug_field==1)
326 change to normal running mode
328 int psr_s = GET_H_PSR_S ();
329 int psr_et = GET_H_PSR_ET ();
331 /* Check for exceptions in the priority order listed in the FRV Architecture
335 /* Halt if PSR.ET is not set. See chapter 6 of the LSI. */
338 SIM_DESC sd = CPU_STATE (current_cpu);
339 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
342 /* privileged_instruction interrupt will have already been queued by
343 frv_detect_insn_access_interrupts. */
348 /* Halt if PSR.S is set. See chapter 6 of the LSI. */
351 SIM_DESC sd = CPU_STATE (current_cpu);
352 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGTRAP);
355 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
358 else if (! CPU_DEBUG_STATE (current_cpu) && debug_field == 0)
360 USI psr = GET_PSR ();
361 /* Return from normal running state. */
362 new_pc = GET_H_SPR (H_SPR_PCSR);
364 SET_PSR_S (psr, GET_PSR_PS (psr));
365 sim_queue_fn_si_write (current_cpu, frvbf_h_spr_set, H_SPR_PSR, psr);
367 else if (CPU_DEBUG_STATE (current_cpu) && debug_field == 1)
369 USI psr = GET_PSR ();
370 /* Return from debug state. */
371 new_pc = GET_H_SPR (H_SPR_BPCSR);
372 SET_PSR_ET (psr, GET_H_BPSR_BET ());
373 SET_PSR_S (psr, GET_H_BPSR_BS ());
374 sim_queue_fn_si_write (current_cpu, frvbf_h_spr_set, H_SPR_PSR, psr);
375 CPU_DEBUG_STATE (current_cpu) = 0;
383 /* Functions for handling non-excepting instruction side effects. */
384 static SI next_available_nesr (SIM_CPU *current_cpu, SI current_index)
386 FRV_REGISTER_CONTROL *control = CPU_REGISTER_CONTROL (current_cpu);
387 if (control->spr[H_SPR_NECR].implemented)
390 USI necr = GET_NECR ();
392 /* See if any NESRs are implemented. First need to check the validity of
394 if (! GET_NECR_VALID (necr))
397 limit = GET_NECR_NEN (necr);
398 for (++current_index; current_index < limit; ++current_index)
400 SI nesr = GET_NESR (current_index);
401 if (! GET_NESR_VALID (nesr))
402 return current_index;
408 static SI next_valid_nesr (SIM_CPU *current_cpu, SI current_index)
410 FRV_REGISTER_CONTROL *control = CPU_REGISTER_CONTROL (current_cpu);
411 if (control->spr[H_SPR_NECR].implemented)
414 USI necr = GET_NECR ();
416 /* See if any NESRs are implemented. First need to check the validity of
418 if (! GET_NECR_VALID (necr))
421 limit = GET_NECR_NEN (necr);
422 for (++current_index; current_index < limit; ++current_index)
424 SI nesr = GET_NESR (current_index);
425 if (GET_NESR_VALID (nesr))
426 return current_index;
433 frvbf_check_non_excepting_load (
434 SIM_CPU *current_cpu, SI base_index, SI disp_index, SI target_index,
435 SI immediate_disp, QI data_size, BI is_float
438 BI rc = 1; /* perform the load. */
439 SIM_DESC sd = CPU_STATE (current_cpu);
449 FRV_REGISTER_CONTROL *control;
451 SI address = GET_H_GR (base_index);
453 address += GET_H_GR (disp_index);
455 address += immediate_disp;
457 /* Check for interrupt factors. */
475 if (target_index & 1)
481 if (target_index & 3)
486 IADDR pc = GET_H_PC ();
487 sim_engine_abort (sd, current_cpu, pc,
488 "check_non_excepting_load: Incorrect data_size\n");
493 control = CPU_REGISTER_CONTROL (current_cpu);
494 if (control->spr[H_SPR_NECR].implemented)
497 do_elos = GET_NECR_VALID (necr) && GET_NECR_ELOS (necr);
502 /* NECR, NESR, NEEAR are only implemented for the full frv machine. */
505 ne_index = next_available_nesr (current_cpu, NO_NESR);
506 if (ne_index == NO_NESR)
508 IADDR pc = GET_H_PC ();
509 sim_engine_abort (sd, current_cpu, pc,
510 "No available NESR register\n");
513 /* Fill in the basic fields of the NESR. */
514 nesr = GET_NESR (ne_index);
515 SET_NESR_VALID (nesr);
517 SET_NESR_DRN (nesr, target_index);
518 SET_NESR_SIZE (nesr, data_size);
519 SET_NESR_NEAN (nesr, ne_index);
523 CLEAR_NESR_FR (nesr);
525 /* Set the corresponding NEEAR. */
526 SET_NEEAR (ne_index, address);
528 SET_NESR_DAEC (nesr, 0);
529 SET_NESR_REC (nesr, 0);
530 SET_NESR_EC (nesr, 0);
533 /* Set the NE flag corresponding to the target register if an interrupt
535 daec is not checked here yet, but is declared for future reference. */
537 NE_base = H_SPR_FNER0;
539 NE_base = H_SPR_GNER0;
541 GET_NE_FLAGS (NE_flags, NE_base);
544 SET_NE_FLAG (NE_flags, target_index);
546 SET_NESR_REC (nesr, NESR_REGISTER_NOT_ALIGNED);
551 SET_NE_FLAG (NE_flags, target_index);
553 SET_NESR_EC (nesr, NESR_MEM_ADDRESS_NOT_ALIGNED);
557 SET_NESR (ne_index, nesr);
559 /* If no interrupt factor was detected then set the NE flag on the
560 target register if the NE flag on one of the input registers
562 if (! rec && ! ec && ! daec)
564 BI ne_flag = GET_NE_FLAG (NE_flags, base_index);
566 ne_flag |= GET_NE_FLAG (NE_flags, disp_index);
569 SET_NE_FLAG (NE_flags, target_index);
570 rc = 0; /* Do not perform the load. */
573 CLEAR_NE_FLAG (NE_flags, target_index);
576 SET_NE_FLAGS (NE_base, NE_flags);
578 return rc; /* perform the load? */
581 /* Record state for media exception: media_cr_not_aligned. */
583 frvbf_media_cr_not_aligned (SIM_CPU *current_cpu)
585 SIM_DESC sd = CPU_STATE (current_cpu);
587 /* On the fr400 this generates an illegal_instruction interrupt. */
588 if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400)
589 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
591 frv_set_mp_exception_registers (current_cpu, MTT_CR_NOT_ALIGNED, 0);
594 /* Record state for media exception: media_acc_not_aligned. */
596 frvbf_media_acc_not_aligned (SIM_CPU *current_cpu)
598 SIM_DESC sd = CPU_STATE (current_cpu);
600 /* On the fr400 this generates an illegal_instruction interrupt. */
601 if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400)
602 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
604 frv_set_mp_exception_registers (current_cpu, MTT_ACC_NOT_ALIGNED, 0);
607 /* Record state for media exception: media_register_not_aligned. */
609 frvbf_media_register_not_aligned (SIM_CPU *current_cpu)
611 SIM_DESC sd = CPU_STATE (current_cpu);
613 /* On the fr400 this generates an illegal_instruction interrupt. */
614 if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_fr400)
615 frv_queue_program_interrupt (current_cpu, FRV_ILLEGAL_INSTRUCTION);
617 frv_set_mp_exception_registers (current_cpu, MTT_INVALID_FR, 0);
620 /* Record state for media exception: media_overflow. */
622 frvbf_media_overflow (SIM_CPU *current_cpu, int sie)
624 frv_set_mp_exception_registers (current_cpu, MTT_OVERFLOW, sie);
627 /* Queue a division exception. */
629 frvbf_division_exception (SIM_CPU *current_cpu, enum frv_dtt dtt,
630 int target_index, int non_excepting)
632 /* If there was an overflow and it is masked, then record it in
634 USI isr = GET_ISR ();
635 if ((dtt & FRV_DTT_OVERFLOW) && GET_ISR_EDE (isr))
637 dtt &= ~FRV_DTT_OVERFLOW;
641 if (dtt != FRV_DTT_NO_EXCEPTION)
645 /* Non excepting instruction, simply set the NE flag for the target
648 GET_NE_FLAGS (NE_flags, H_SPR_GNER0);
649 SET_NE_FLAG (NE_flags, target_index);
650 SET_NE_FLAGS (H_SPR_GNER0, NE_flags);
653 frv_queue_division_exception_interrupt (current_cpu, dtt);
659 frvbf_check_recovering_store (
660 SIM_CPU *current_cpu, PCADDR address, SI regno, int size, int is_float
663 FRV_CACHE *cache = CPU_DATA_CACHE (current_cpu);
666 CPU_RSTR_INVALIDATE(current_cpu) = 0;
668 for (reg_ix = next_valid_nesr (current_cpu, NO_NESR);
670 reg_ix = next_valid_nesr (current_cpu, reg_ix))
672 if (address == GET_H_SPR (H_SPR_NEEAR0 + reg_ix))
674 SI nesr = GET_NESR (reg_ix);
675 int nesr_drn = GET_NESR_DRN (nesr);
676 BI nesr_fr = GET_NESR_FR (nesr);
679 /* Invalidate cache block containing this address.
680 If we need to count cycles, then the cache operation will be
681 initiated from the model profiling functions.
682 See frvbf_model_.... */
685 CPU_RSTR_INVALIDATE(current_cpu) = 1;
686 CPU_LOAD_ADDRESS (current_cpu) = address;
689 frv_cache_invalidate (cache, address, 1/* flush */);
691 /* Copy the stored value to the register indicated by NESR.DRN. */
692 for (remain = size; remain > 0; remain -= 4)
697 value = GET_H_FR (regno);
699 value = GET_H_GR (regno);
714 sim_queue_fn_sf_write (current_cpu, frvbf_h_fr_set, nesr_drn,
717 sim_queue_fn_si_write (current_cpu, frvbf_h_gr_set, nesr_drn,
723 break; /* Only consider the first matching register. */
725 } /* loop over active neear registers. */
729 clear_nesr_neear (SIM_CPU *current_cpu, SI target_index, BI is_float)
733 /* Only implemented for full frv. */
734 SIM_DESC sd = CPU_STATE (current_cpu);
735 if (STATE_ARCHITECTURE (sd)->mach != bfd_mach_frv)
738 /* Clear the appropriate NESR and NEEAR registers. */
739 for (reg_ix = next_valid_nesr (current_cpu, NO_NESR);
741 reg_ix = next_valid_nesr (current_cpu, reg_ix))
744 /* The register is available, now check if it is active. */
745 nesr = GET_NESR (reg_ix);
746 if (GET_NESR_FR (nesr) == is_float)
748 if (target_index < 0 || GET_NESR_DRN (nesr) == target_index)
750 SET_NESR (reg_ix, 0);
751 SET_NEEAR (reg_ix, 0);
759 SIM_CPU *current_cpu,
769 GET_NE_FLAGS (NE_flags, NE_base);
770 if (target_index >= 0)
771 CLEAR_NE_FLAG (NE_flags, target_index);
779 SET_NE_FLAGS (NE_base, NE_flags);
782 /* Return 1 if the given register is available, 0 otherwise. TARGET_INDEX==-1
783 means to check for any register available. */
785 which_registers_available (
786 SIM_CPU *current_cpu, int *hi_available, int *lo_available, int is_float
790 frv_fr_registers_available (current_cpu, hi_available, lo_available);
792 frv_gr_registers_available (current_cpu, hi_available, lo_available);
796 frvbf_clear_ne_flags (SIM_CPU *current_cpu, SI target_index, BI is_float)
803 FRV_REGISTER_CONTROL *control;
805 /* Check for availability of the target register(s). */
806 which_registers_available (current_cpu, & hi_available, & lo_available,
809 /* Check to make sure that the target register is available. */
810 if (! frv_check_register_access (current_cpu, target_index,
811 hi_available, lo_available))
814 /* Determine whether we're working with GR or FR registers. */
816 NE_base = H_SPR_FNER0;
818 NE_base = H_SPR_GNER0;
820 /* Always clear the appropriate NE flags. */
821 clear_ne_flags (current_cpu, target_index, hi_available, lo_available,
824 /* Clear the appropriate NESR and NEEAR registers. */
825 control = CPU_REGISTER_CONTROL (current_cpu);
826 if (control->spr[H_SPR_NECR].implemented)
829 if (GET_NECR_VALID (necr) && GET_NECR_ELOS (necr))
830 clear_nesr_neear (current_cpu, target_index, is_float);
835 frvbf_commit (SIM_CPU *current_cpu, SI target_index, BI is_float)
844 FRV_REGISTER_CONTROL *control;
846 /* Check for availability of the target register(s). */
847 which_registers_available (current_cpu, & hi_available, & lo_available,
850 /* Check to make sure that the target register is available. */
851 if (! frv_check_register_access (current_cpu, target_index,
852 hi_available, lo_available))
855 /* Determine whether we're working with GR or FR registers. */
857 NE_base = H_SPR_FNER0;
859 NE_base = H_SPR_GNER0;
861 /* Determine whether a ne exception is pending. */
862 GET_NE_FLAGS (NE_flags, NE_base);
863 if (target_index >= 0)
864 NE_flag = GET_NE_FLAG (NE_flags, target_index);
868 hi_available && NE_flags[0] != 0 || lo_available && NE_flags[1] != 0;
871 /* Always clear the appropriate NE flags. */
872 clear_ne_flags (current_cpu, target_index, hi_available, lo_available,
875 control = CPU_REGISTER_CONTROL (current_cpu);
876 if (control->spr[H_SPR_NECR].implemented)
879 if (GET_NECR_VALID (necr) && GET_NECR_ELOS (necr) && NE_flag)
881 /* Clear the appropriate NESR and NEEAR registers. */
882 clear_nesr_neear (current_cpu, target_index, is_float);
883 frv_queue_program_interrupt (current_cpu, FRV_COMMIT_EXCEPTION);
888 /* Generate the appropriate fp_exception(s) based on the given status code. */
890 frvbf_fpu_error (CGEN_FPU* fpu, int status)
892 struct frv_fp_exception_info fp_info = {
893 FSR_NO_EXCEPTION, FTT_IEEE_754_EXCEPTION
897 (sim_fpu_status_invalid_snan |
898 sim_fpu_status_invalid_qnan |
899 sim_fpu_status_invalid_isi |
900 sim_fpu_status_invalid_idi |
901 sim_fpu_status_invalid_zdz |
902 sim_fpu_status_invalid_imz |
903 sim_fpu_status_invalid_cvi |
904 sim_fpu_status_invalid_cmp |
905 sim_fpu_status_invalid_sqrt))
906 fp_info.fsr_mask |= FSR_INVALID_OPERATION;
908 if (status & sim_fpu_status_invalid_div0)
909 fp_info.fsr_mask |= FSR_DIVISION_BY_ZERO;
911 if (status & sim_fpu_status_inexact)
912 fp_info.fsr_mask |= FSR_INEXACT;
914 if (status & sim_fpu_status_overflow)
915 fp_info.fsr_mask |= FSR_OVERFLOW;
917 if (status & sim_fpu_status_underflow)
918 fp_info.fsr_mask |= FSR_UNDERFLOW;
920 if (status & sim_fpu_status_denorm)
922 fp_info.fsr_mask |= FSR_DENORMAL_INPUT;
923 fp_info.ftt = FTT_DENORMAL_INPUT;
926 if (fp_info.fsr_mask != FSR_NO_EXCEPTION)
928 SIM_CPU *current_cpu = (SIM_CPU *)fpu->owner;
929 frv_queue_fp_exception_interrupt (current_cpu, & fp_info);