1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
|
/* 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;
/* BEGIN GCC-XML MODIFICATIONS ($Date: 2007-10-31 15:07:06 $) */
gccxml_fix_printf();
/* END GCC-XML MODIFICATIONS ($Date: 2007-10-31 15:07:06 $) */
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;
}
|