X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgenattr.c;h=72d13f59826c62381620831efa8e45c364761f46;hb=6a1c27c3f606a383c075e329c769128c54ee57e2;hp=5be826b35de4f726c190a6456f1d8ba0eb83fae9;hpb=3ef9782d37366cbfcab1b7f47e68771e71f1b728;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/genattr.c b/gcc/genattr.c index 5be826b35de..72d13f59826 100644 --- a/gcc/genattr.c +++ b/gcc/genattr.c @@ -1,46 +1,33 @@ /* Generate attribute information (insn-attr.h) from machine description. - Copyright (C) 1991, 1994, 1996 Free Software Foundation, Inc. + 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, 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 -#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" -#ifdef HAVE_STDLIB_H -#include -#endif - -static struct obstack obstack; -struct obstack *rtl_obstack = &obstack; - -#define obstack_chunk_alloc xmalloc -#define obstack_chunk_free free - -extern void free PROTO((void *)); -extern rtx read_rtx PROTO((FILE *)); - -char *xmalloc PROTO((unsigned)); -static void fatal (); -void fancy_abort PROTO((void)); /* A range of values. */ @@ -64,6 +51,13 @@ struct function_unit 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; @@ -84,62 +78,55 @@ init_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 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 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"); } } @@ -156,21 +143,21 @@ write_units (num_units, multiplicity, simultaneity, 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 ("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); @@ -195,58 +182,18 @@ write_units (num_units, multiplicity, simultaneity, 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. */ +extern int main PARAMS ((int, char **)); -void -fancy_abort () -{ - fatal ("Internal gcc abort."); -} - 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; @@ -259,39 +206,35 @@ main (argc, argv) init_range (&all_issue_delay); init_range (&all_blockage); - obstack_init (rtl_obstack); + progname = "genattr"; if (argc <= 1) - fatal ("No input file name."); - - infile = fopen (argv[1], "r"); - if (infile == 0) - { - perror (argv[1]); - exit (FATAL_EXIT_CODE); - } + fatal ("no input file name"); - 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); @@ -300,9 +243,9 @@ 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 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; } @@ -311,14 +254,14 @@ 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 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; } } @@ -326,7 +269,7 @@ from the machine description file `md'. */\n\n"); 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); @@ -339,11 +282,9 @@ from the machine description file `md'. */\n\n"); 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; @@ -357,7 +298,7 @@ from the machine description file `md'. */\n\n"); } 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); @@ -368,10 +309,18 @@ from the machine description file `md'. */\n\n"); 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 @@ -408,6 +357,107 @@ from the machine description file `md'. */\n\n"); 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. @@ -421,8 +471,18 @@ 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 (code) + int code ATTRIBUTE_UNUSED; +{ + return NULL; }