/* Generate attribute information (insn-attr.h) from machine description.
- Copyright (C) 1989 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.
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. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
-#include <stdio.h>
-#include "config.h"
+#include "hconfig.h"
+#include "system.h"
#include "rtl.h"
#include "obstack.h"
+#include "errors.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 ();
+/* A range of values. */
-char *xmalloc ();
-static void fatal ();
-void fancy_abort ();
+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 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;
+ 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 (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;
+ 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));
+ 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 ("_");
}
- else if (*p >= 'a' && *p <= 'z')
- printf ("%c", *p - 'a' + 'A');
else
- printf ("%c", *p);
+ putchar (TOUPPER(*p));
}
printf ("};\n");
- printf ("extern enum attr_%s get_attr_%s ();\n\n",
- XSTR (attr, 0), XSTR (attr, 0));
+ 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 void shorten_branches PARAMS ((rtx));\n");
+ printf ("extern int insn_default_length PARAMS ((rtx));\n");
+ printf ("extern int insn_variable_length_p PARAMS ((rtx));\n");
+ printf ("extern int insn_current_length PARAMS ((rtx));\n\n");
printf ("extern int *insn_addresses;\n");
printf ("extern int insn_current_address;\n\n");
}
}
static void
-write_units ()
+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 ();\n");
- printf ("extern int function_units_used ();\n\n");
+ printf ("extern int result_ready_cost PARAMS ((rtx));\n");
+ printf ("extern int function_units_used PARAMS ((rtx));\n\n");
printf ("extern struct function_unit_desc\n");
printf ("{\n");
- printf (" char *name;\n");
+ printf (" const char *name;\n");
printf (" int bitmask;\n");
printf (" int multiplicity;\n");
printf (" int simultaneity;\n");
printf (" int default_cost;\n");
- printf (" int (*ready_cost_function) ();\n");
- printf (" int (*conflict_cost_function) ();\n");
+ printf (" int max_issue_delay;\n");
+ printf (" int (*ready_cost_function) PARAMS ((rtx));\n");
+ printf (" int (*conflict_cost_function) PARAMS ((rtx, rtx));\n");
+ printf (" int max_blockage;\n");
+ printf (" unsigned int (*blockage_range_function) PARAMS ((rtx));\n");
+ printf (" int (*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 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 *
+PTR
xmalloc (size)
- unsigned size;
+ size_t size;
{
- register char *val = (char *) malloc (size);
+ register PTR val = (PTR) malloc (size);
if (val == 0)
fatal ("virtual memory exhausted");
return val;
}
-char *
-xrealloc (ptr, size)
- char *ptr;
- unsigned size;
+PTR
+xrealloc (old, size)
+ PTR old;
+ size_t size;
{
- char * result = (char *) realloc (ptr, size);
- if (!result)
+ register PTR ptr;
+ if (old)
+ ptr = (PTR) realloc (old, size);
+ else
+ ptr = (PTR) malloc (size);
+ if (!ptr)
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);
+ return ptr;
}
-/* 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.");
-}
-\f
int
main (argc, argv)
int argc;
{
rtx desc;
FILE *infile;
- extern rtx read_rtx ();
register int c;
int have_delay = 0;
int have_annul_true = 0;
int have_annul_false = 0;
- int have_units = 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 i;
+ init_range (&all_multiplicity);
+ init_range (&all_simultaneity);
+ init_range (&all_ready_cost);
+ init_range (&all_issue_delay);
+ init_range (&all_blockage);
+
+ progname = "genattr";
obstack_init (rtl_obstack);
if (argc <= 1)
if (infile == 0)
{
perror (argv[1]);
- exit (FATAL_EXIT_CODE);
+ return (FATAL_EXIT_CODE);
}
-
- init_rtl ();
+ read_rtx_filename = argv[1];
printf ("/* Generated automatically by the program `genattr'\n\
from the machine description file `md'. */\n\n");
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 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 && ! have_units)
+ else if (GET_CODE (desc) == DEFINE_FUNCTION_UNIT)
{
- have_units = 1;
- write_units ();
+ const 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);
+ }
+ }
+
+ if (num_units > 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 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");
+
fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- /* NOTREACHED */
- return 0;
+ return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : 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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