2020-02-03 Bill Schmidt <wschm...@linux.ibm.com>
* config/rs6000/rs6000-genbif.c (MAXBIFSTANZAS): New defined
constant.
(bif_stanzas): New filescope variable.
(curr_bif_stanza): Likewise.
(fnkinds): New enum.
(typelist): New struct.
(attrinfo): New struct.
(prototype): New struct.
(MAXBIFS): New defined constant.
(bifdata): New struct.
(bifs): New filescope variable.
(curr_bif): Likewise.
(parse_bif_args): New function.
(parse_bif_attrs): New function.
(parse_prototype): New function.
(parse_bif_entry): New function.
(parse_bif_stanza): New function.
(parse_bif): Implement.
---
gcc/config/rs6000/rs6000-genbif.c | 473 +++++++++++++++++++++++++++++-
1 file changed, 472 insertions(+), 1 deletion(-)
diff --git a/gcc/config/rs6000/rs6000-genbif.c
b/gcc/config/rs6000/rs6000-genbif.c
index 38401224dce..e7ce777afbb 100644
--- a/gcc/config/rs6000/rs6000-genbif.c
+++ b/gcc/config/rs6000/rs6000-genbif.c
@@ -156,7 +156,23 @@ enum void_status {
VOID_OK
};
+/* Stanzas are groupings of built-in functions and overloads by some
+ common feature/attribute. These definitions are for built-in function
+ stanzas. */
+#define MAXBIFSTANZAS 256
+static char *bif_stanzas[MAXBIFSTANZAS];
static int num_bif_stanzas;
+static int curr_bif_stanza;
+
+/* Function modifiers provide special handling for const, pure, and math
+ functions. These are mutually exclusive, and therefore kept separate
+ from other bif attributes. */
+enum fnkinds {
+ FNK_NONE,
+ FNK_CONST,
+ FNK_PURE,
+ FNK_MATH
+};
/* Legal base types for an argument or return type. */
enum basetype {
@@ -199,7 +215,54 @@ struct typeinfo {
int val2;
};
+/* A list of argument types. */
+struct typelist {
+ typeinfo info;
+ typelist *next;
+};
+
+/* Attributes of a builtin function. */
+struct attrinfo {
+ char isinit;
+ char isset;
+ char isext;
+ char isnosoft;
+ char isldv;
+ char isstv;
+ char isreve;
+ char isabs;
+ char ispred;
+ char ishtm;
+};
+
+/* Fields associated with a function prototype (bif or overload). */
+struct prototype {
+ typeinfo rettype;
+ char *bifname;
+ int nargs;
+ typelist *args;
+ int restr_opnd;
+ restriction restr;
+ int restr_val1;
+ int restr_val2;
+};
+
+/* Data associated with a builtin function, and a table of such data. */
+#define MAXBIFS 16384
+struct bifdata {
+ int stanza;
+ fnkinds kind;
+ prototype proto;
+ char *idname;
+ char *patname;
+ attrinfo attrs;
+ char *fndecl;
+};
+
+static bifdata bifs[MAXBIFS];
static int num_bifs;
+static int curr_bif;
+
static int num_ovld_stanzas;
static int num_ovlds;
@@ -747,11 +810,419 @@ match_type (typeinfo *typedata, int voidok)
return match_basetype (typedata);
}
+/* Parse the argument list, returning 1 if success or 0 if any
+ malformation is found. */
+static int
+parse_bif_args (prototype *protoptr)
+{
+ typelist **argptr = &protoptr->args;
+ int *nargs = &protoptr->nargs;
+ int *restr_opnd = &protoptr->restr_opnd;
+ restriction *restr = &protoptr->restr;
+ int *val1 = &protoptr->restr_val1;
+ int *val2 = &protoptr->restr_val2;
+
+ int success;
+ *nargs = 0;
+
+ /* Start the argument list. */
+ consume_whitespace ();
+ if (linebuf[pos] != '(')
+ {
+ (*diag) ("missing '(' at column %d.\n", pos + 1);
+ return 0;
+ }
+ safe_inc_pos ();
+
+ do {
+ consume_whitespace ();
+ int oldpos = pos;
+ typelist *argentry = (typelist *) malloc (sizeof (typelist));
+ memset (argentry, 0, sizeof (*argentry));
+ typeinfo *argtype = &argentry->info;
+ success = match_type (argtype, VOID_NOTOK);
+ if (success)
+ {
+ if (argtype->restr)
+ {
+ if (*restr_opnd)
+ {
+ (*diag) ("More than one restricted operand\n");
+ return 0;
+ }
+ *restr_opnd = *nargs;
+ *restr = argtype->restr;
+ *val1 = argtype->val1;
+ *val2 = argtype->val2;
+ }
+ (*nargs)++;
+ *argptr = argentry;
+ argptr = &argentry->next;
+ consume_whitespace ();
+ if (linebuf[pos] == ',')
+ safe_inc_pos ();
+ else if (linebuf[pos] != ')')
+ {
+ (*diag) ("arg not followed by ',' or ')' at column %d.\n",
+ pos + 1);
+ return 0;
+ }
+
+#ifdef DEBUG
+ (*diag) ("argument type: isvoid = %d, isconst = %d, isvector = %d, \
+issigned = %d, isunsigned = %d, isbool = %d, ispixel = %d, ispointer = %d, \
+base = %d, restr = %d, val1 = %d, val2 = %d, pos = %d.\n",
+ argtype->isvoid, argtype->isconst, argtype->isvector,
+ argtype->issigned, argtype->isunsigned, argtype->isbool,
+ argtype->ispixel, argtype->ispointer, argtype->base,
+ argtype->restr, argtype->val1, argtype->val2, pos + 1);
+#endif
+ }
+ else
+ {
+ free (argentry);
+ *argptr = NULL;
+ pos = oldpos;
+ if (linebuf[pos] != ')')
+ {
+ (*diag) ("badly terminated arg list at column %d.\n", pos + 1);
+ return 0;
+ }
+ safe_inc_pos ();
+ }
+ } while (success);
+
+ return 1;
+}
+
+/* Parse the attribute list, returning 1 if success or 0 if any
+ malformation is found. */
+static int
+parse_bif_attrs (attrinfo *attrptr)
+{
+ consume_whitespace ();
+ if (linebuf[pos] != '{')
+ {
+ (*diag) ("missing attribute set at column %d.\n", pos + 1);
+ return 0;
+ }
+ safe_inc_pos ();
+
+ memset (attrptr, 0, sizeof (*attrptr));
+ char *attrname = NULL;
+
+ do {
+ consume_whitespace ();
+ int oldpos = pos;
+ attrname = match_identifier ();
+ if (attrname)
+ {
+ if (!strcmp (attrname, "init"))
+ attrptr->isinit = 1;
+ else if (!strcmp (attrname, "set"))
+ attrptr->isset = 1;
+ else if (!strcmp (attrname, "ext"))
+ attrptr->isext = 1;
+ else if (!strcmp (attrname, "nosoft"))
+ attrptr->isnosoft = 1;
+ else if (!strcmp (attrname, "ldv"))
+ attrptr->isldv = 1;
+ else if (!strcmp (attrname, "stv"))
+ attrptr->isstv = 1;
+ else if (!strcmp (attrname, "reve"))
+ attrptr->isreve = 1;
+ else if (!strcmp (attrname, "abs"))
+ attrptr->isabs = 1;
+ else if (!strcmp (attrname, "pred"))
+ attrptr->ispred = 1;
+ else if (!strcmp (attrname, "htm"))
+ attrptr->ishtm = 1;
+ else
+ {
+ (*diag) ("unknown attribute at column %d.\n", oldpos + 1);
+ return 0;
+ }
+
+ consume_whitespace ();
+ if (linebuf[pos] == ',')
+ safe_inc_pos ();
+ else if (linebuf[pos] != '}')
+ {
+ (*diag) ("arg not followed by ',' or '}' at column %d.\n",
+ pos + 1);
+ return 0;
+ }
+ }
+ else
+ {
+ pos = oldpos;
+ if (linebuf[pos] != '}')
+ {
+ (*diag) ("badly terminated attr set at column %d.\n", pos + 1);
+ return 0;
+ }
+ safe_inc_pos ();
+ }
+ } while (attrname);
+
+#ifdef DEBUG
+ (*diag) ("attribute set: init = %d, set = %d, ext = %d, \
+nosoft = %d, ldv = %d, stv = %d, reve = %d, abs = %d, pred = %d, \
+htm = %d.\n",
+ attrptr->isinit, attrptr->isset, attrptr->isext, attrptr->isnosoft,
+ attrptr->isldv, attrptr->isstv, attrptr->isreve, attrptr->isabs,
+ attrptr->ispred, attrptr->ishtm);
+#endif
+
+ return 1;
+}
+
+/* Parse a function prototype. This code is shared by the bif and overload
+ file processing. Return 1 for success, 0 for failure. */
+static int
+parse_prototype (prototype *protoptr)
+{
+ typeinfo *ret_type = &protoptr->rettype;
+ char **bifname = &protoptr->bifname;
+
+ /* Get the return type. */
+ consume_whitespace ();
+ int oldpos = pos;
+ int success = match_type (ret_type, VOID_OK);
+ if (!success)
+ {
+ (*diag) ("missing or badly formed return type at column %d.\n",
+ oldpos + 1);
+ return 0;
+ }
+
+#ifdef DEBUG
+ (*diag) ("return type: isvoid = %d, isconst = %d, isvector = %d, \
+issigned = %d, isunsigned = %d, isbool = %d, ispixel = %d, ispointer = %d, \
+base = %d, restr = %d, val1 = %d, val2 = %d, pos = %d.\n",
+ ret_type->isvoid, ret_type->isconst, ret_type->isvector,
+ ret_type->issigned, ret_type->isunsigned, ret_type->isbool,
+ ret_type->ispixel, ret_type->ispointer, ret_type->base,
+ ret_type->restr, ret_type->val1, ret_type->val2, pos + 1);
+#endif
+
+ /* Get the bif name. */
+ consume_whitespace ();
+ oldpos = pos;
+ *bifname = match_identifier ();
+ if (!*bifname)
+ {
+ (*diag) ("missing function name at column %d.\n", oldpos + 1);
+ return 0;
+ }
+
+#ifdef DEBUG
+ (*diag) ("function name is '%s'.\n", *bifname);
+#endif
+
+ /* Process arguments. */
+ if (!parse_bif_args (protoptr))
+ return 0;
+
+ /* Process terminating semicolon. */
+ consume_whitespace ();
+ if (linebuf[pos] != ';')
+ {
+ (*diag) ("missing semicolon at column %d.\n", pos + 1);
+ return 0;
+ }
+ safe_inc_pos ();
+ consume_whitespace ();
+ if (linebuf[pos] != '\n')
+ {
+ (*diag) ("garbage at end of line at column %d.\n", pos + 1);
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Parse a two-line entry for a built-in function. Return 1 for
+ success, 2 for end-of-stanza, and 5 for a parsing error. */
+static int
+parse_bif_entry ()
+{
+ /* Check for end of stanza. */
+ pos = 0;
+ consume_whitespace ();
+ if (linebuf[pos] == '[')
+ return 2;
+
+ /* Allocate an entry in the bif table. */
+ if (num_bifs >= MAXBIFS - 1)
+ {
+ (*diag) ("too many built-in functions.\n");
+ return 5;
+ }
+
+ curr_bif = num_bifs++;
+ bifs[curr_bif].stanza = curr_bif_stanza;
+
+ /* Read the first token and see if it is a function modifier. */
+ consume_whitespace ();
+ int oldpos = pos;
+ char *token = match_identifier ();
+ if (!token)
+ {
+ (*diag) ("malformed entry at column %d\n", pos + 1);
+ return 5;
+ }
+
+ if (!strcmp (token, "const"))
+ bifs[curr_bif].kind = FNK_CONST;
+ else if (!strcmp (token, "pure"))
+ bifs[curr_bif].kind = FNK_PURE;
+ else if (!strcmp (token, "math"))
+ bifs[curr_bif].kind = FNK_MATH;
+ else
+ {
+ /* No function modifier, so push the token back. */
+ pos = oldpos;
+ bifs[curr_bif].kind = FNK_NONE;
+ }
+
+ if (!parse_prototype (&bifs[curr_bif].proto))
+ return 5;
+
+ /* Now process line 2. First up is the builtin id. */
+ if (!advance_line (bif_file))
+ {
+ (*diag) ("unexpected EOF.\n");
+ return 5;
+ }
+
+ pos = 0;
+ consume_whitespace ();
+ oldpos = pos;
+ bifs[curr_bif].idname = match_identifier ();
+ if (!bifs[curr_bif].idname)
+ {
+ (*diag) ("missing builtin id at column %d.\n", pos + 1);
+ return 5;
+ }
+
+#ifdef DEBUG
+ (*diag) ("ID name is '%s'.\n", bifs[curr_bif].idname);
+#endif
+
+ /* Save the ID in a lookup structure. */
+ if (!rbt_insert (&bif_rbt, bifs[curr_bif].idname))
+ {
+ (*diag) ("duplicate function ID '%s' at column %d.\n",
+ bifs[curr_bif].idname, oldpos + 1);
+ return 5;
+ }
+
+ /* Now the pattern name. */
+ consume_whitespace ();
+ bifs[curr_bif].patname = match_identifier ();
+ if (!bifs[curr_bif].patname)
+ {
+ (*diag) ("missing pattern name at column %d.\n", pos + 1);
+ return 5;
+ }
+
+#ifdef DEBUG
+ (*diag) ("pattern name is '%s'.\n", bifs[curr_bif].patname);
+#endif
+
+ /* Process attributes. */
+ if (!parse_bif_attrs (&bifs[curr_bif].attrs))
+ return 5;
+
+ return 1;
+}
+
+/* Parse one stanza of the input BIF file. linebuf already contains the
+ first line to parse. Return 1 for success, 0 for EOF, 5 for failure. */
+static int
+parse_bif_stanza ()
+{
+ /* Parse the stanza header. */
+ pos = 0;
+ consume_whitespace ();
+
+ if (linebuf[pos] != '[')
+ {
+ (*diag) ("ill-formed stanza header at column %d.\n", pos + 1);
+ return 5;
+ }
+ safe_inc_pos ();
+
+ char *stanza_name = match_identifier ();
+ if (!stanza_name)
+ {
+ (*diag) ("no identifier found in stanza header.\n");
+ return 5;
+ }
+
+ /* Add the identifier to a table and set the number to be recorded
+ with subsequent bif entries. */
+ if (num_bif_stanzas >= MAXBIFSTANZAS)
+ {
+ (*diag) ("too many stanza headers.\n");
+ return 5;
+ }
+
+ curr_bif_stanza = num_bif_stanzas;
+ bif_stanzas[num_bif_stanzas++] = stanza_name;
+
+ if (linebuf[pos] != ']')
+ {
+ (*diag) ("ill-formed stanza header at column %d.\n", pos + 1);
+ return 5;
+ }
+ safe_inc_pos ();
+
+ consume_whitespace ();
+ if (linebuf[pos] != '\n' && pos != LINELEN - 1)
+ {
+ (*diag) ("garbage after stanza header.\n");
+ return 5;
+ }
+
+ int result = 1;
+
+ while (result != 2) /* end of stanza */
+ {
+ int result;
+ if (!advance_line (bif_file))
+ return 0;
+
+ result = parse_bif_entry();
+ if (!result) /* EOF */
+ return 0;
+ else if (result > 2)
+ return 5;
+ }
+
+ return 1;
+}
+
/* Parse the built-in file. Return 1 for success, 5 for a parsing failure. */
static int
parse_bif ()
{
- return 1;
+ int result;
+ diag = &bif_diag;
+ while (1)
+ {
+ if (!advance_line (bif_file))
+ return 1;
+
+ /* Parse a stanza beginning at this line. */
+ result = parse_bif_stanza ();
+ if (result != 1)
+ break;
+ }
+ if (result == 0)
+ return 1;
+ return result;
}
/* Parse the overload file. Return 1 for success, 6 for a parsing error. */
--
2.17.1
