/* Generate attribute information (insn-attr.h) from machine description.
- Copyright (C) 1991 Free Software Foundation, Inc.
- Contributed by Richard Kenner (kenner@nyu.edu)
+ Copyright (C) 1991, 1994, 1996, 1998, 1999, 2000 Free Software Foundation, Inc.
+ Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
-#include <stdio.h>
-#include "hconfig.h"
+#include "bconfig.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
-#include "obstack.h"
+#include "errors.h"
+#include "gensupport.h"
-static struct obstack obstack;
-struct obstack *rtl_obstack = &obstack;
-
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
-
-extern void free ();
-extern int atoi ();
-extern rtx read_rtx ();
-
-char *xmalloc ();
-static void fatal ();
-void fancy_abort ();
/* A range of values. */
struct range issue_delay; /* Range of issue delay values. */
};
+static void extend_range PARAMS ((struct range *, int, int));
+static void init_range PARAMS ((struct range *));
+static void write_upcase PARAMS ((const char *));
+static void gen_attr PARAMS ((rtx));
+static void write_units PARAMS ((int, struct range *, struct range *,
+ struct range *, struct range *,
+ struct range *));
static void
extend_range (range, min, max)
struct range *range;
static void
write_upcase (str)
- char *str;
+ const char *str;
{
for (; *str; str++)
- if (*str >= 'a' && *str <= 'z')
- printf ("%c", *str - 'a' + 'A');
- else
- printf ("%c", *str);
+ putchar (TOUPPER(*str));
}
static void
gen_attr (attr)
rtx attr;
{
- char *p;
+ const char *p, *tag;
+ int is_const = GET_CODE (XEXP (attr, 2)) == CONST;
printf ("#define HAVE_ATTR_%s\n", XSTR (attr, 0));
/* If numeric attribute, don't need to write an enum. */
- if (*XSTR (attr, 1) == '\0')
- printf ("extern int get_attr_%s ();\n", XSTR (attr, 0));
+ p = XSTR (attr, 1);
+ if (*p == '\0')
+ printf ("extern int get_attr_%s PARAMS ((%s));\n", XSTR (attr, 0),
+ (is_const ? "void" : "rtx"));
else
{
printf ("enum attr_%s {", XSTR (attr, 0));
- write_upcase (XSTR (attr, 0));
- printf ("_");
- for (p = XSTR (attr, 1); *p != '\0'; p++)
+ while ((tag = scan_comma_elt (&p)) != 0)
{
+ write_upcase (XSTR (attr, 0));
+ putchar ('_');
+ while (tag != p)
+ putchar (TOUPPER (*tag++));
if (*p == ',')
- {
- printf (", ");
- write_upcase (XSTR (attr, 0));
- printf ("_");
- }
- else if (*p >= 'a' && *p <= 'z')
- printf ("%c", *p - 'a' + 'A');
- else
- printf ("%c", *p);
+ fputs (", ", stdout);
}
- printf ("};\n");
- printf ("extern enum attr_%s get_attr_%s ();\n\n",
- XSTR (attr, 0), XSTR (attr, 0));
+ fputs ("};\n", stdout);
+ printf ("extern enum attr_%s get_attr_%s PARAMS ((%s));\n\n",
+ XSTR (attr, 0), XSTR (attr, 0), (is_const ? "void" : "rtx"));
}
/* If `length' attribute, write additional function definitions and define
variables used by `insn_current_length'. */
if (! strcmp (XSTR (attr, 0), "length"))
{
- printf ("extern void init_lengths ();\n");
- printf ("extern void shorten_branches ();\n");
- printf ("extern int insn_default_length ();\n");
- printf ("extern int insn_variable_length_p ();\n");
- printf ("extern int insn_current_length ();\n\n");
- printf ("extern int *insn_addresses;\n");
- printf ("extern int insn_current_address;\n\n");
+ puts ("\
+extern void shorten_branches PARAMS ((rtx));\n\
+extern int insn_default_length PARAMS ((rtx));\n\
+extern int insn_variable_length_p PARAMS ((rtx));\n\
+extern int insn_current_length PARAMS ((rtx));\n\n\
+#include \"insn-addr.h\"\n");
}
}
int i, q_size;
printf ("#define INSN_SCHEDULING\n\n");
- printf ("extern int result_ready_cost ();\n");
- printf ("extern int function_units_used ();\n\n");
- printf ("extern struct function_unit_desc\n");
+ printf ("extern int result_ready_cost PARAMS ((rtx));\n");
+ printf ("extern int function_units_used PARAMS ((rtx));\n\n");
+ printf ("extern const struct function_unit_desc\n");
printf ("{\n");
- printf (" char *name;\n");
- printf (" int bitmask;\n");
- printf (" int multiplicity;\n");
- printf (" int simultaneity;\n");
- printf (" int default_cost;\n");
- printf (" int max_issue_delay;\n");
- printf (" int (*ready_cost_function) ();\n");
- printf (" int (*conflict_cost_function) ();\n");
- printf (" int max_blockage;\n");
- printf (" unsigned int (*blockage_range_function) ();\n");
- printf (" int (*blockage_function) ();\n");
+ printf (" const char *const name;\n");
+ printf (" const int bitmask;\n");
+ printf (" const int multiplicity;\n");
+ printf (" const int simultaneity;\n");
+ printf (" const int default_cost;\n");
+ printf (" const int max_issue_delay;\n");
+ printf (" int (*const ready_cost_function) PARAMS ((rtx));\n");
+ printf (" int (*const conflict_cost_function) PARAMS ((rtx, rtx));\n");
+ printf (" const int max_blockage;\n");
+ printf (" unsigned int (*const blockage_range_function) PARAMS ((rtx));\n");
+ printf (" int (*const blockage_function) PARAMS ((rtx, rtx));\n");
printf ("} function_units[];\n\n");
printf ("#define FUNCTION_UNITS_SIZE %d\n", num_units);
printf ("#define MIN_MULTIPLICITY %d\n", multiplicity->min);
printf ("#define INSN_QUEUE_SIZE %d\n", q_size);
}
-char *
-xmalloc (size)
- unsigned size;
-{
- register char *val = (char *) malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
- return val;
-}
-
-char *
-xrealloc (ptr, size)
- char *ptr;
- unsigned size;
-{
- char * result = (char *) realloc (ptr, size);
- if (!result)
- fatal ("virtual memory exhausted");
- return result;
-}
+extern int main PARAMS ((int, char **));
-static void
-fatal (s, a1, a2)
- char *s;
-{
- fprintf (stderr, "genattr: ");
- fprintf (stderr, s, a1, a2);
- fprintf (stderr, "\n");
- exit (FATAL_EXIT_CODE);
-}
-
-/* More 'friendly' abort that prints the line and file.
- config.h can #define abort fancy_abort if you like that sort of thing. */
-
-void
-fancy_abort ()
-{
- fatal ("Internal gcc abort.");
-}
-\f
int
main (argc, argv)
int argc;
char **argv;
{
rtx desc;
- FILE *infile;
- register int c;
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;
init_range (&all_issue_delay);
init_range (&all_blockage);
- obstack_init (rtl_obstack);
+ progname = "genattr";
if (argc <= 1)
- fatal ("No input file name.");
+ fatal ("no input file name");
- infile = fopen (argv[1], "r");
- if (infile == 0)
- {
- perror (argv[1]);
- exit (FATAL_EXIT_CODE);
- }
-
- init_rtl ();
+ if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
+ return (FATAL_EXIT_CODE);
- printf ("/* Generated automatically by the program `genattr'\n\
-from the machine description file `md'. */\n\n");
+ puts ("/* Generated automatically by the program `genattr'");
+ puts (" from the machine description file `md'. */\n");
+ puts ("#ifndef GCC_INSN_ATTR_H");
+ puts ("#define GCC_INSN_ATTR_H\n");
/* For compatibility, define the attribute `alternative', which is just
a reference to the variable `which_alternative'. */
- printf ("#define HAVE_ATTR_alternative\n");
- printf ("#define get_attr_alternative(insn) which_alternative\n");
+ puts ("#define HAVE_ATTR_alternative");
+ puts ("#define get_attr_alternative(insn) which_alternative");
/* Read the machine description. */
while (1)
{
- c = read_skip_spaces (infile);
- if (c == EOF)
+ int line_no, insn_code_number;
+
+ desc = read_md_rtx (&line_no, &insn_code_number);
+ if (desc == NULL)
break;
- ungetc (c, infile);
- desc = read_rtx (infile);
if (GET_CODE (desc) == DEFINE_ATTR)
gen_attr (desc);
if (! have_delay)
{
printf ("#define DELAY_SLOTS\n");
- printf ("extern int num_delay_slots ();\n");
- printf ("extern int eligible_for_delay ();\n\n");
- printf ("extern int const_num_delay_slots ();\n\n");
+ printf ("extern int num_delay_slots PARAMS ((rtx));\n");
+ printf ("extern int eligible_for_delay PARAMS ((rtx, int, rtx, int));\n\n");
+ printf ("extern int const_num_delay_slots PARAMS ((rtx));\n\n");
have_delay = 1;
}
if (XVECEXP (desc, 1, i + 1) && ! have_annul_true)
{
printf ("#define ANNUL_IFTRUE_SLOTS\n");
- printf ("extern int eligible_for_annul_true ();\n");
+ printf ("extern int eligible_for_annul_true PARAMS ((rtx, int, rtx, int));\n");
have_annul_true = 1;
}
if (XVECEXP (desc, 1, i + 2) && ! have_annul_false)
{
printf ("#define ANNUL_IFFALSE_SLOTS\n");
- printf ("extern int eligible_for_annul_false ();\n");
+ printf ("extern int eligible_for_annul_false PARAMS ((rtx, int, rtx, int));\n");
have_annul_false = 1;
}
}
else if (GET_CODE (desc) == DEFINE_FUNCTION_UNIT)
{
- char *name = XSTR (desc, 0);
+ const char *name = XSTR (desc, 0);
int multiplicity = XINT (desc, 1);
int simultaneity = XINT (desc, 2);
int ready_cost = MAX (XINT (desc, 4), 1);
if (unit == 0)
{
- int len = strlen (name) + 1;
unit = (struct function_unit *)
- alloca (sizeof (struct function_unit));
- unit->name = (char *) alloca (len);
- bcopy (name, unit->name, len);
+ xmalloc (sizeof (struct function_unit));
+ unit->name = xstrdup (name);
unit->multiplicity = multiplicity;
unit->simultaneity = simultaneity;
unit->ready_cost.min = unit->ready_cost.max = ready_cost;
}
else if (unit->multiplicity != multiplicity
|| unit->simultaneity != simultaneity)
- fatal ("Differing specifications given for `%s' function unit.",
+ fatal ("Differing specifications given for `%s' function unit",
unit->name);
extend_range (&unit->ready_cost, ready_cost, ready_cost);
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
for (unit = units; unit; unit = unit->next)
{
struct range blockage;
- int max_issue_time = MAX (unit->issue_delay.max, 1);
blockage = unit->issue_delay;
blockage.max = MAX (unit->ready_cost.max
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 ("/* Clean insn code cache. It should be called if there\n");
+ printf (" is a chance that condition value in a\n");
+ printf (" define_insn_reservation will be changed after\n");
+ printf (" last call of dfa_start. */\n");
+ printf ("extern void dfa_clean_insn_cache PARAMS ((void));\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.
+
+ Flags are used to hold branch direction and prediction information
+ for use by eligible_for_... */
+ printf("\n#define ATTR_FLAG_forward\t0x1\n");
+ printf("#define ATTR_FLAG_backward\t0x2\n");
+ printf("#define ATTR_FLAG_likely\t0x4\n");
+ printf("#define ATTR_FLAG_very_likely\t0x8\n");
+ printf("#define ATTR_FLAG_unlikely\t0x10\n");
+ printf("#define ATTR_FLAG_very_unlikely\t0x20\n");
+
+ puts("\n#endif /* GCC_INSN_ATTR_H */");
- fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- /* NOTREACHED */
- return 0;
+ if (ferror (stdout) || fflush (stdout) || fclose (stdout))
+ return FATAL_EXIT_CODE;
+
+ return SUCCESS_EXIT_CODE;
+}
+
+/* Define this so we can link with print-rtl.o to get debug_rtx function. */
+const char *
+get_insn_name (code)
+ int code ATTRIBUTE_UNUSED;
+{
+ return NULL;
}
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