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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/genattr.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/genattr.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/genattr.c b/gcc-4.2.1-5666.3/gcc/genattr.c new file mode 100644 index 000000000..83fb5e88f --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/genattr.c @@ -0,0 +1,284 @@ +/* Generate attribute information (insn-attr.h) from machine description. + 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 GCC. + +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. + +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 GCC; see the file COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + + +#include "bconfig.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "rtl.h" +#include "errors.h" +#include "gensupport.h" + + +static void write_upcase (const char *); +static void gen_attr (rtx); + +static void +write_upcase (const char *str) +{ + for (; *str; str++) + putchar (TOUPPER(*str)); +} + +static void +gen_attr (rtx attr) +{ + 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. */ + 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)); + + while ((tag = scan_comma_elt (&p)) != 0) + { + write_upcase (XSTR (attr, 0)); + putchar ('_'); + while (tag != p) + putchar (TOUPPER (*tag++)); + if (*p == ',') + fputs (", ", stdout); + } + + 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")) + { + puts ("\ +extern void shorten_branches (rtx);\n\ +extern int insn_default_length (rtx);\n\ +extern int insn_min_length (rtx);\n\ +extern int insn_variable_length_p (rtx);\n\ +extern int insn_current_length (rtx);\n\n\ +#include \"insn-addr.h\"\n"); + } +} + +int +main (int argc, char **argv) +{ + rtx desc; + int have_delay = 0; + int have_annul_true = 0; + int have_annul_false = 0; + int num_insn_reservations = 0; + int i; + + progname = "genattr"; + + if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE) + return (FATAL_EXIT_CODE); + + 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'. */ + + puts ("#define HAVE_ATTR_alternative"); + puts ("#define get_attr_alternative(insn) which_alternative"); + + /* Read the machine description. */ + + while (1) + { + int line_no, insn_code_number; + + desc = read_md_rtx (&line_no, &insn_code_number); + if (desc == NULL) + break; + + if (GET_CODE (desc) == DEFINE_ATTR) + gen_attr (desc); + + else if (GET_CODE (desc) == DEFINE_DELAY) + { + if (! have_delay) + { + printf ("#define DELAY_SLOTS\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; + } + + for (i = 0; i < XVECLEN (desc, 1); i += 3) + { + if (XVECEXP (desc, 1, i + 1) && ! have_annul_true) + { + printf ("#define ANNUL_IFTRUE_SLOTS\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 (rtx, int, rtx, int);\n"); + have_annul_false = 1; + } + } + } + + else if (GET_CODE (desc) == DEFINE_INSN_RESERVATION) + num_insn_reservations++; + } + + if (num_insn_reservations > 0) + { + /* 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 ("/* Internal insn code number used by automata. */\n"); + printf ("extern int internal_dfa_insn_code (rtx);\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 const 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 ("extern void dfa_clear_single_insn_cache (rtx);\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. + + 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 */"); + + if (ferror (stdout) || fflush (stdout) || fclose (stdout)) + return FATAL_EXIT_CODE; + + return SUCCESS_EXIT_CODE; +} |