X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgenattr.c;h=44ba0e00714ed662df8b0f385b123847b76c829c;hb=44fcef54e407a058a5a1ed8f9e372deb3bff9d10;hp=fe3457c45ec9cd87510d86d177b5c81a089f438d;hpb=12693c8153016a21d356d907085cd5ca8bac4814;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/genattr.c b/gcc/genattr.c index fe3457c45ec..44ba0e00714 100644 --- a/gcc/genattr.c +++ b/gcc/genattr.c @@ -1,296 +1,126 @@ /* Generate attribute information (insn-attr.h) from machine description. - Copyright (C) 1991, 1994, 1996, 1998 Free Software Foundation, Inc. + Copyright (C) 1991, 1994, 1996, 1998, 1999, 2000, 2003, 2004 + 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, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, 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 "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 - -char *xmalloc PROTO((unsigned)); -static void fatal (); -void fancy_abort PROTO((void)); - -/* A range of values. */ - -struct range -{ - int min; - int max; -}; - -/* Record information about each function unit mentioned in a - DEFINE_FUNCTION_UNIT. */ - -struct function_unit -{ - char *name; /* Function unit name. */ - struct function_unit *next; /* Next function unit. */ - int multiplicity; /* Number of units of this type. */ - int simultaneity; /* Maximum number of simultaneous insns - on this function unit or 0 if unlimited. */ - struct range ready_cost; /* Range of ready cost values. */ - struct range issue_delay; /* Range of issue delay values. */ -}; - -static void extend_range PROTO((struct range *, int, int)); -static void write_upcase PROTO((char *)); -static void gen_attr PROTO((rtx)); -static void write_units PROTO((int, struct range *, struct range *, - struct range *, struct range *, - struct range *)); -static void -extend_range (range, min, max) - struct range *range; - int min; - int max; -{ - if (range->min > min) range->min = min; - if (range->max < max) range->max = max; -} - -static void -init_range (range) - struct range *range; -{ - range->min = 100000; - range->max = -1; -} +static void write_upcase (const char *); +static void gen_attr (rtx); static void -write_upcase (str) - char *str; +write_upcase (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; +gen_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 (%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 (%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 PROTO((rtx));\n"); - printf ("extern int insn_default_length PROTO((rtx));\n"); - printf ("extern int insn_variable_length_p PROTO((rtx));\n"); - printf ("extern int insn_current_length PROTO((rtx));\n\n"); - printf ("extern int *insn_addresses;\n"); - printf ("extern int insn_current_address;\n\n"); + puts ("\ +extern void shorten_branches (rtx);\n\ +extern int insn_default_length (rtx);\n\ +extern int insn_variable_length_p (rtx);\n\ +extern int insn_current_length (rtx);\n\n\ +#include \"insn-addr.h\"\n"); } } -static void -write_units (num_units, multiplicity, simultaneity, - ready_cost, issue_delay, blockage) - int num_units; - struct range *multiplicity; - struct range *simultaneity; - struct range *ready_cost; - struct range *issue_delay; - struct range *blockage; -{ - int i, q_size; - - printf ("#define INSN_SCHEDULING\n\n"); - printf ("extern int result_ready_cost PROTO((rtx));\n"); - printf ("extern int function_units_used PROTO((rtx));\n\n"); - printf ("extern 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 ("} function_units[];\n\n"); - printf ("#define FUNCTION_UNITS_SIZE %d\n", num_units); - printf ("#define MIN_MULTIPLICITY %d\n", multiplicity->min); - printf ("#define MAX_MULTIPLICITY %d\n", multiplicity->max); - printf ("#define MIN_SIMULTANEITY %d\n", simultaneity->min); - printf ("#define MAX_SIMULTANEITY %d\n", simultaneity->max); - printf ("#define MIN_READY_COST %d\n", ready_cost->min); - printf ("#define MAX_READY_COST %d\n", ready_cost->max); - printf ("#define MIN_ISSUE_DELAY %d\n", issue_delay->min); - printf ("#define MAX_ISSUE_DELAY %d\n", issue_delay->max); - printf ("#define MIN_BLOCKAGE %d\n", blockage->min); - printf ("#define MAX_BLOCKAGE %d\n", blockage->max); - for (i = 0; (1 << i) < blockage->max; i++) - ; - printf ("#define BLOCKAGE_BITS %d\n", i + 1); - - /* INSN_QUEUE_SIZE is a power of two larger than MAX_BLOCKAGE and - MAX_READY_COST. This is the longest time an isnsn may be queued. */ - i = MAX (blockage->max, ready_cost->max); - for (q_size = 1; q_size <= i; q_size <<= 1) - ; - 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; -} - -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."); -} - int -main (argc, argv) - int argc; - char **argv; +main (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_units = 0; - struct range all_simultaneity, all_multiplicity; - struct range all_ready_cost, all_issue_delay, all_blockage; - struct function_unit *units = 0, *unit; + int num_insn_reservations = 0; int i; - init_range (&all_multiplicity); - init_range (&all_simultaneity); - init_range (&all_ready_cost); - init_range (&all_issue_delay); - init_range (&all_blockage); - - obstack_init (rtl_obstack); - - if (argc <= 1) - fatal ("No input file name."); + progname = "genattr"; - infile = fopen (argv[1], "r"); - if (infile == 0) - { - perror (argv[1]); - exit (FATAL_EXIT_CODE); - } + if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE) + return (FATAL_EXIT_CODE); - init_rtl (); - - 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); @@ -299,9 +129,9 @@ from the machine description file `md'. */\n\n"); if (! have_delay) { printf ("#define DELAY_SLOTS\n"); - printf ("extern int num_delay_slots PROTO((rtx));\n"); - printf ("extern int eligible_for_delay PROTO((rtx, int, rtx, int));\n\n"); - printf ("extern int const_num_delay_slots PROTO((rtx));\n\n"); + printf ("extern int num_delay_slots (rtx);\n"); + printf ("extern int eligible_for_delay (rtx, int, rtx, int);\n\n"); + printf ("extern int const_num_delay_slots (rtx);\n\n"); have_delay = 1; } @@ -310,106 +140,134 @@ from the machine description file `md'. */\n\n"); 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 (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 (rtx, int, rtx, int);\n"); have_annul_false = 1; } } } - else if (GET_CODE (desc) == DEFINE_FUNCTION_UNIT) - { - char *name = XSTR (desc, 0); - int multiplicity = XINT (desc, 1); - int simultaneity = XINT (desc, 2); - int ready_cost = MAX (XINT (desc, 4), 1); - int issue_delay = MAX (XINT (desc, 5), 1); - int issueexp_p = (XVEC (desc, 6) != 0); - - for (unit = units; unit; unit = unit->next) - if (strcmp (unit->name, name) == 0) - break; - - 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); - unit->multiplicity = multiplicity; - unit->simultaneity = simultaneity; - unit->ready_cost.min = unit->ready_cost.max = ready_cost; - unit->issue_delay.min = unit->issue_delay.max = issue_delay; - unit->next = units; - units = unit; - num_units++; - - extend_range (&all_multiplicity, multiplicity, multiplicity); - extend_range (&all_simultaneity, simultaneity, simultaneity); - } - else if (unit->multiplicity != multiplicity - || unit->simultaneity != simultaneity) - fatal ("Differing specifications given for `%s' function unit.", - unit->name); - - extend_range (&unit->ready_cost, ready_cost, ready_cost); - extend_range (&unit->issue_delay, - issueexp_p ? 1 : issue_delay, issue_delay); - extend_range (&all_ready_cost, - unit->ready_cost.min, unit->ready_cost.max); - 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_insn_reservations > 0) { - /* Compute the range of blockage cost values. See genattrtab.c - for the derivation. BLOCKAGE (E,C) when SIMULTANEITY is zero is - - MAX (ISSUE-DELAY (E,C), - READY-COST (E) - (READY-COST (C) - 1)) - - and otherwise - - MAX (ISSUE-DELAY (E,C), - READY-COST (E) - (READY-COST (C) - 1), - READY-COST (E) - FILL-TIME) */ - - for (unit = units; unit; unit = unit->next) - { - struct range blockage; - - blockage = unit->issue_delay; - blockage.max = MAX (unit->ready_cost.max - - (unit->ready_cost.min - 1), - blockage.max); - blockage.min = MAX (1, blockage.min); - - if (unit->simultaneity != 0) - { - int fill_time = ((unit->simultaneity - 1) - * unit->issue_delay.min); - blockage.min = MAX (unit->ready_cost.min - fill_time, - blockage.min); - blockage.max = MAX (unit->ready_cost.max - fill_time, - blockage.max); - } - extend_range (&all_blockage, blockage.min, blockage.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#define INSN_SCHEDULING\n"); + printf ("\n/* DFA based pipeline interface. */"); + printf ("\n#ifndef AUTOMATON_ALTS\n"); + printf ("#define AUTOMATON_ALTS 0\n"); + printf ("#endif\n\n"); + 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 (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 (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 (rtx, rtx);\n\n"); + printf ("\n#if AUTOMATON_ALTS\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 (rtx);\n\n"); + printf ("#endif\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 (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 (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 (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 (state_t, rtx);\n"); + printf ("#endif\n\n"); + printf ("extern int min_issue_delay (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 (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 (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 (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 (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 (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 (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 (void);\n"); + printf ("extern void dfa_finish (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. + /* Output flag masks for use by reorg. Flags are used to hold branch direction and prediction information for use by eligible_for_... */ @@ -420,8 +278,17 @@ from the machine description file `md'. */\n\n"); printf("#define ATTR_FLAG_unlikely\t0x10\n"); printf("#define ATTR_FLAG_very_unlikely\t0x20\n"); - fflush (stdout); - exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); - /* NOTREACHED */ - return 0; + puts("\n#endif /* GCC_INSN_ATTR_H */"); + + 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 (int code ATTRIBUTE_UNUSED) +{ + return NULL; }