int have_delay = 0;
int have_annul_true = 0;
int have_annul_false = 0;
+ int num_insn_reservations = 0;
int num_units = 0;
struct range all_simultaneity, all_multiplicity;
struct range all_ready_cost, all_issue_delay, all_blockage;
progname = "genattr";
if (argc <= 1)
- fatal ("No input file name");
+ fatal ("no input file name");
if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
return (FATAL_EXIT_CODE);
extend_range (&all_issue_delay,
unit->issue_delay.min, unit->issue_delay.max);
}
+ else if (GET_CODE (desc) == DEFINE_INSN_RESERVATION)
+ num_insn_reservations++;
}
- if (num_units > 0)
+ if (num_units > 0 || num_insn_reservations > 0)
{
+ if (num_units > 0)
+ printf ("#define TRADITIONAL_PIPELINE_INTERFACE 1\n");
+
+ if (num_insn_reservations > 0)
+ printf ("#define DFA_PIPELINE_INTERFACE 1\n");
+
/* Compute the range of blockage cost values. See genattrtab.c
for the derivation. BLOCKAGE (E,C) when SIMULTANEITY is zero is
write_units (num_units, &all_multiplicity, &all_simultaneity,
&all_ready_cost, &all_issue_delay, &all_blockage);
+
+ /* Output interface for pipeline hazards recognition based on
+ DFA (deterministic finite state automata. */
+ printf ("\n/* DFA based pipeline interface. */");
+ printf ("\n#ifndef AUTOMATON_STATE_ALTS\n");
+ printf ("#define AUTOMATON_STATE_ALTS 0\n");
+ printf ("#endif\n\n");
+ printf ("#ifndef CPU_UNITS_QUERY\n");
+ printf ("#define CPU_UNITS_QUERY 0\n");
+ printf ("#endif\n\n");
+ /* Interface itself: */
+ printf ("extern int max_dfa_issue_rate;\n\n");
+ printf ("/* The following macro value is calculated from the\n");
+ printf (" automaton based pipeline description and is equal to\n");
+ printf (" maximal number of all insns described in constructions\n");
+ printf (" `define_insn_reservation' which can be issued on the\n");
+ printf (" same processor cycle. */\n");
+ printf ("#define MAX_DFA_ISSUE_RATE max_dfa_issue_rate\n\n");
+ printf ("/* Insn latency time defined in define_insn_reservation. */\n");
+ printf ("extern int insn_default_latency PARAMS ((rtx));\n\n");
+ printf ("/* Return nonzero if there is a bypass for given insn\n");
+ printf (" which is a data producer. */\n");
+ printf ("extern int bypass_p PARAMS ((rtx));\n\n");
+ printf ("/* Insn latency time on data consumed by the 2nd insn.\n");
+ printf (" Use the function if bypass_p returns nonzero for\n");
+ printf (" the 1st insn. */\n");
+ printf ("extern int insn_latency PARAMS ((rtx, rtx));\n\n");
+ printf ("/* The following function returns number of alternative\n");
+ printf (" reservations of given insn. It may be used for better\n");
+ printf (" insns scheduling heuristics. */\n");
+ printf ("extern int insn_alts PARAMS ((rtx));\n\n");
+ printf ("/* Maximal possible number of insns waiting results being\n");
+ printf (" produced by insns whose execution is not finished. */\n");
+ printf ("extern int max_insn_queue_index;\n\n");
+ printf ("/* Pointer to data describing current state of DFA. */\n");
+ printf ("typedef void *state_t;\n\n");
+ printf ("/* Size of the data in bytes. */\n");
+ printf ("extern int state_size PARAMS ((void));\n\n");
+ printf ("/* Initiate given DFA state, i.e. Set up the state\n");
+ printf (" as all functional units were not reserved. */\n");
+ printf ("extern void state_reset PARAMS ((state_t));\n");
+ printf ("/* The following function returns negative value if given\n");
+ printf (" insn can be issued in processor state described by given\n");
+ printf (" DFA state. In this case, the DFA state is changed to\n");
+ printf (" reflect the current and future reservations by given\n");
+ printf (" insn. Otherwise the function returns minimal time\n");
+ printf (" delay to issue the insn. This delay may be zero\n");
+ printf (" for superscalar or VLIW processors. If the second\n");
+ printf (" parameter is NULL the function changes given DFA state\n");
+ printf (" as new processor cycle started. */\n");
+ printf ("extern int state_transition PARAMS ((state_t, rtx));\n");
+ printf ("\n#if AUTOMATON_STATE_ALTS\n");
+ printf ("/* The following function returns number of possible\n");
+ printf (" alternative reservations of given insn in given\n");
+ printf (" DFA state. It may be used for better insns scheduling\n");
+ printf (" heuristics. By default the function is defined if\n");
+ printf (" macro AUTOMATON_STATE_ALTS is defined because its\n");
+ printf (" implementation may require much memory. */\n");
+ printf ("extern int state_alts PARAMS ((state_t, rtx));\n");
+ printf ("#endif\n\n");
+ printf ("extern int min_issue_delay PARAMS ((state_t, rtx));\n");
+ printf ("/* The following function returns nonzero if no one insn\n");
+ printf (" can be issued in current DFA state. */\n");
+ printf ("extern int state_dead_lock_p PARAMS ((state_t));\n");
+ printf ("/* The function returns minimal delay of issue of the 2nd\n");
+ printf (" insn after issuing the 1st insn in given DFA state.\n");
+ printf (" The 1st insn should be issued in given state (i.e.\n");
+ printf (" state_transition should return negative value for\n");
+ printf (" the insn and the state). Data dependencies between\n");
+ printf (" the insns are ignored by the function. */\n");
+ printf
+ ("extern int min_insn_conflict_delay PARAMS ((state_t, rtx, rtx));\n");
+ printf ("/* The following function outputs reservations for given\n");
+ printf (" insn as they are described in the corresponding\n");
+ printf (" define_insn_reservation. */\n");
+ printf ("extern void print_reservation PARAMS ((FILE *, rtx));\n");
+ printf ("\n#if CPU_UNITS_QUERY\n");
+ printf ("/* The following function returns code of functional unit\n");
+ printf (" with given name (see define_cpu_unit). */\n");
+ printf ("extern int get_cpu_unit_code PARAMS ((const char *));\n");
+ printf ("/* The following function returns nonzero if functional\n");
+ printf (" unit with given code is currently reserved in given\n");
+ printf (" DFA state. */\n");
+ printf ("extern int cpu_unit_reservation_p PARAMS ((state_t, int));\n");
+ printf ("#endif\n\n");
+ printf ("/* Initiate and finish work with DFA. They should be\n");
+ printf (" called as the first and the last interface\n");
+ printf (" functions. */\n");
+ printf ("extern void dfa_start PARAMS ((void));\n");
+ printf ("extern void dfa_finish PARAMS ((void));\n");
+ }
+ else
+ {
+ /* Otherwise we do no scheduling, but we need these typedefs
+ in order to avoid uglifying other code with more ifdefs. */
+ printf ("typedef void *state_t;\n\n");
}
/* Output flag masks for use by reorg.
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