From: Bill Schmidt <wschm...@linux.ibm.com>
2020-07-26 Bill Schmidt <wschm...@linux.ibm.com>
* config/rs6000/rs6000-gen-builtins.c (bif_stanza): New enum.
(curr_bif_stanza): Likewise.
(stanza_entry): New struct.
(stanza_map): New initialized filescope variable.
(enable_string): Likewise.
(fnkinds): New enum.
(typelist): New struct.
(attrinfo): Likewise.
(prototype): Likewise.
(MAXBIFS): New defined constant.
(bifdata): New struct.
(bifs): New filescope variable.
(curr_bif): Likewise.
(stanza_name_to_stanza): New function.
(parse_bif_attrs): New stub function.
(parse_prototype): Likewise.
(parse_bif_entry): New function.
(parse_bif_stanza): Likewise.
(parse_bif): Implement.
---
gcc/config/rs6000/rs6000-gen-builtins.c | 320 +++++++++++++++++++++++-
1 file changed, 319 insertions(+), 1 deletion(-)
diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c
b/gcc/config/rs6000/rs6000-gen-builtins.c
index d6058a8e73b..a8b0d8e4288 100644
--- a/gcc/config/rs6000/rs6000-gen-builtins.c
+++ b/gcc/config/rs6000/rs6000-gen-builtins.c
@@ -173,6 +173,93 @@ 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. */
+enum bif_stanza {
+ BSTZ_ALWAYS,
+ BSTZ_P5,
+ BSTZ_P6,
+ BSTZ_ALTIVEC,
+ BSTZ_VSX,
+ BSTZ_P7,
+ BSTZ_P7_64,
+ BSTZ_P8,
+ BSTZ_P8V,
+ BSTZ_P9,
+ BSTZ_P9_64,
+ BSTZ_P9V,
+ BSTZ_IEEE128_HW,
+ BSTZ_DFP,
+ BSTZ_CRYPTO,
+ BSTZ_HTM,
+ BSTZ_P10,
+ BSTZ_MMA,
+ NUMBIFSTANZAS
+};
+
+static bif_stanza curr_bif_stanza;
+
+struct stanza_entry
+{
+ const char *stanza_name;
+ bif_stanza stanza;
+};
+
+static stanza_entry stanza_map[NUMBIFSTANZAS] =
+ {
+ { "always", BSTZ_ALWAYS },
+ { "power5", BSTZ_P5 },
+ { "power6", BSTZ_P6 },
+ { "altivec", BSTZ_ALTIVEC },
+ { "vsx", BSTZ_VSX },
+ { "power7", BSTZ_P7 },
+ { "power7-64", BSTZ_P7_64 },
+ { "power8", BSTZ_P8 },
+ { "power8-vector", BSTZ_P8V },
+ { "power9", BSTZ_P9 },
+ { "power9-64", BSTZ_P9_64 },
+ { "power9-vector", BSTZ_P9V },
+ { "ieee128-hw", BSTZ_IEEE128_HW },
+ { "dfp", BSTZ_DFP },
+ { "crypto", BSTZ_CRYPTO },
+ { "htm", BSTZ_HTM },
+ { "power10", BSTZ_P10 },
+ { "mma", BSTZ_MMA }
+ };
+
+static const char *enable_string[NUMBIFSTANZAS] =
+ {
+ "ENB_ALWAYS",
+ "ENB_P5",
+ "ENB_P6",
+ "ENB_ALTIVEC",
+ "ENB_VSX",
+ "ENB_P7",
+ "ENB_P7_64",
+ "ENB_P8",
+ "ENB_P8V",
+ "ENB_P9",
+ "ENB_P9_64",
+ "ENB_P9V",
+ "ENB_IEEE128_HW",
+ "ENB_DFP",
+ "ENB_CRYPTO",
+ "ENB_HTM",
+ "ENB_P10",
+ "ENB_MMA"
+ };
+
+/* Function modifiers provide special handling for const, pure, and fpmath
+ functions. These are mutually exclusive, and therefore kept separate
+ from other bif attributes. */
+enum fnkinds {
+ FNK_NONE,
+ FNK_CONST,
+ FNK_PURE,
+ FNK_FPMATH
+};
+
/* Legal base types for an argument or return type. */
enum basetype {
BT_CHAR,
@@ -221,7 +308,58 @@ 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 isextract;
+ char isnosoft;
+ char isldvec;
+ char isstvec;
+ char isreve;
+ char ispred;
+ char ishtm;
+ char ishtmspr;
+ char ishtmcr;
+ char ismma;
+ char isno32bit;
+ char iscpu;
+ char isldstmask;
+};
+
+/* Fields associated with a function prototype (bif or overload). */
+struct prototype {
+ typeinfo rettype;
+ char *bifname;
+ int nargs;
+ typelist *args;
+ int restr_opnd[2];
+ restriction restr[2];
+ int restr_val1[2];
+ int restr_val2[2];
+};
+
+/* 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;
@@ -404,6 +542,15 @@ handle_pointer (typeinfo *typedata)
}
}
+static bif_stanza
+stanza_name_to_stanza (const char *stanza_name)
+{
+ for (int i = 0; i < NUMBIFSTANZAS; i++)
+ if (!strcmp (stanza_name, stanza_map[i].stanza_name))
+ return stanza_map[i].stanza;
+ assert (false);
+}
+
/* Match one of the allowable base types. Consumes one token unless the
token is "long", which must be paired with a second "long". Optionally
consumes a following '*' token for pointers. Return 1 for success,
@@ -906,11 +1053,182 @@ match_type (typeinfo *typedata, int voidok)
return match_basetype (typedata);
}
+/* Parse the attribute list. */
+static parse_codes
+parse_bif_attrs (attrinfo *attrptr)
+{
+ return PC_OK;
+}
+
+/* Parse a function prototype. This code is shared by the bif and overload
+ file processing. */
+static parse_codes
+parse_prototype (prototype *protoptr)
+{
+ return PC_OK;
+}
+
+/* Parse a two-line entry for a built-in function. */
+static parse_codes
+parse_bif_entry ()
+{
+ /* Check for end of stanza. */
+ pos = 0;
+ consume_whitespace ();
+ if (linebuf[pos] == '[')
+ return PC_EOSTANZA;
+
+ /* Allocate an entry in the bif table. */
+ if (num_bifs >= MAXBIFS - 1)
+ {
+ (*diag) ("too many built-in functions.\n");
+ return PC_PARSEFAIL;
+ }
+
+ 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 PC_PARSEFAIL;
+ }
+
+ 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, "fpmath"))
+ bifs[curr_bif].kind = FNK_FPMATH;
+ else
+ {
+ /* No function modifier, so push the token back. */
+ pos = oldpos;
+ bifs[curr_bif].kind = FNK_NONE;
+ }
+
+ if (parse_prototype (&bifs[curr_bif].proto) == PC_PARSEFAIL)
+ return PC_PARSEFAIL;
+
+ /* Now process line 2. First up is the builtin id. */
+ if (!advance_line (bif_file))
+ {
+ (*diag) ("unexpected EOF.\n");
+ return PC_PARSEFAIL;
+ }
+
+ 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 PC_PARSEFAIL;
+ }
+
+#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 PC_PARSEFAIL;
+ }
+
+ /* 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 PC_PARSEFAIL;
+ }
+
+#ifdef DEBUG
+ (*diag) ("pattern name is '%s'.\n", bifs[curr_bif].patname);
+#endif
+
+ /* Process attributes. */
+ return parse_bif_attrs (&bifs[curr_bif].attrs);
+}
+
+/* Parse one stanza of the input BIF file. linebuf already contains the
+ first line to parse. */
+static parse_codes
+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 PC_PARSEFAIL;
+ }
+ safe_inc_pos ();
+
+ const char *stanza_name = match_to_right_bracket ();
+ if (!stanza_name)
+ {
+ (*diag) ("no expression found in stanza header.\n");
+ return PC_PARSEFAIL;
+ }
+
+ curr_bif_stanza = stanza_name_to_stanza (stanza_name);
+
+ if (linebuf[pos] != ']')
+ {
+ (*diag) ("ill-formed stanza header at column %d.\n", pos + 1);
+ return PC_PARSEFAIL;
+ }
+ safe_inc_pos ();
+
+ consume_whitespace ();
+ if (linebuf[pos] != '\n' && pos != LINELEN - 1)
+ {
+ (*diag) ("garbage after stanza header.\n");
+ return PC_PARSEFAIL;
+ }
+
+ parse_codes result = PC_OK;
+
+ while (result != PC_EOSTANZA)
+ {
+ if (!advance_line (bif_file))
+ return PC_EOFILE;
+ result = parse_bif_entry ();
+ if (result == PC_PARSEFAIL)
+ return PC_PARSEFAIL;
+ }
+
+ return PC_OK;
+}
+
/* Parse the built-in file. */
static parse_codes
parse_bif ()
{
- return PC_OK;
+ parse_codes result;
+ diag = &bif_diag;
+ if (!advance_line (bif_file))
+ return PC_OK;
+
+ do
+ result = parse_bif_stanza ();
+ while (result == PC_OK);
+
+ if (result == PC_EOFILE)
+ return PC_OK;
+ return result;
}
/* Parse the overload file. */
--
2.17.1
