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From: William Schmidt <wschmidt@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/wschmidt/heads/builtins10)] rs6000: Add functions for matching types, part 1 of 3 Date: Thu, 25 Mar 2021 15:44:54 +0000 (GMT) [thread overview] Message-ID: <20210325154454.5A13D3858012@sourceware.org> (raw) https://gcc.gnu.org/g:e894bbea3b8cc38b24bf9c5680e9d4772199fa11 commit e894bbea3b8cc38b24bf9c5680e9d4772199fa11 Author: Bill Schmidt <wschmidt@linux.ibm.com> Date: Wed Mar 24 11:57:49 2021 -0500 rs6000: Add functions for matching types, part 1 of 3 2021-03-24 Bill Schmidt <wschmidt@linux.ibm.com> gcc/ * config/rs6000/rs6000-gen-builtins.c (void_status): New enum. (basetype): Likewise. (typeinfo): New struct. (handle_pointer): New function. (match_basetype): New stub function. (match_const_restriction): Likewise. (match_type): New function. Diff: --- gcc/config/rs6000/rs6000-gen-builtins.c | 360 ++++++++++++++++++++++++++++++++ 1 file changed, 360 insertions(+) diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c index 136d6911760..5ce1707d84e 100644 --- a/gcc/config/rs6000/rs6000-gen-builtins.c +++ b/gcc/config/rs6000/rs6000-gen-builtins.c @@ -189,6 +189,49 @@ static char linebuf[LINELEN]; static int line; static int pos; +/* Used to determine whether a type can be void (only return types). */ +enum void_status { + VOID_NOTOK, + VOID_OK +}; + +/* Legal base types for an argument or return type. */ +enum basetype { + BT_CHAR, + BT_SHORT, + BT_INT, + BT_LONG, + BT_LONGLONG, + BT_FLOAT, + BT_DOUBLE, + BT_LONGDOUBLE, + BT_INT128, + BT_FLOAT128, + BT_BOOL, + BT_STRING, + BT_DECIMAL32, + BT_DECIMAL64, + BT_DECIMAL128, + BT_IBM128, + BT_VPAIR, + BT_VQUAD +}; + +/* Type modifiers for an argument or return type. */ +struct typeinfo { + char isvoid; + char isconst; + char isvector; + char issigned; + char isunsigned; + char isbool; + char ispixel; + char ispointer; + basetype base; + int val1; + int val2; +}; + /* Exit codes for the shell. */ enum exit_codes { EC_INTERR @@ -330,3 +373,320 @@ match_to_right_bracket () pos = lastpos + 1; return buf; } + +static inline void +handle_pointer (typeinfo *typedata) +{ + consume_whitespace (); + if (linebuf[pos] == '*') + { + typedata->ispointer = 1; + safe_inc_pos (); + } +} + +/* 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, + 0 for failure. */ +static int +match_basetype (typeinfo *typedata) +{ + return 1; +} + +/* A const int argument may be restricted to certain values. This is + indicated by one of the following occurring after the "int' token: + + <x> restricts the constant to x bits, interpreted as unsigned + <x,y> restricts the constant to the inclusive range [x,y] + [x,y] restricts the constant to the inclusive range [x,y], + but only applies if the argument is constant. + {x,y} restricts the constant to one of two values, x or y. + + Here x and y are integer tokens. Note that the "const" token is a + lie when the restriction is [x,y], but this simplifies the parsing + significantly and is hopefully forgivable. + + Return 1 for success, else 0. */ +static int +match_const_restriction (typeinfo *typedata) +{ + return 1; +} + +/* Look for a type, which can be terminated by a token that is not part of + a type, a comma, or a closing parenthesis. Place information about the + type in TYPEDATA. Return 1 for success, 0 for failure. */ +static int +match_type (typeinfo *typedata, int voidok) +{ + /* A legal type is of the form: + + [const] [[signed|unsigned] <basetype> | <vectype>] [*] + + Legal values of <basetype> are (for now): + + char + short + int + long long + float + double + __int128 + _Float128 + _Decimal32 + _Decimal64 + _Decimal128 + __ibm128 + + Legal values of <vectype> are as follows, and are shorthand for + the associated meaning: + + vsc vector signed char + vuc vector unsigned char + vbc vector bool char + vss vector signed short + vus vector unsigned short + vbs vector bool short + vsi vector signed int + vui vector unsigned int + vbi vector bool int + vsll vector signed long long + vull vector unsigned long long + vbll vector bool long long + vsq vector signed __int128 + vuq vector unsigned __int128 + vbq vector bool __int128 + vp vector pixel + vf vector float + vd vector double + v256 __vector_pair + v512 __vector_quad + + For simplicity, We don't support "short int" and "long long int". + We don't currently support a <basetype> of "_Float16". "signed" + and "unsigned" only apply to integral base types. The optional * + indicates a pointer type. */ + + consume_whitespace (); + memset (typedata, 0, sizeof(*typedata)); + int oldpos = pos; + + char *token = match_identifier (); + if (!token) + return 0; + + if (!strcmp (token, "const")) + { + typedata->isconst = 1; + consume_whitespace (); + oldpos = pos; + token = match_identifier (); + } + + if (!strcmp (token, "void")) + typedata->isvoid = 1; + + if (!strcmp (token, "vsc")) + { + typedata->isvector = 1; + typedata->issigned = 1; + typedata->base = BT_CHAR; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vuc")) + { + typedata->isvector = 1; + typedata->isunsigned = 1; + typedata->base = BT_CHAR; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vbc")) + { + typedata->isvector = 1; + typedata->isbool = 1; + typedata->base = BT_CHAR; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vss")) + { + typedata->isvector = 1; + typedata->issigned = 1; + typedata->base = BT_SHORT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vus")) + { + typedata->isvector = 1; + typedata->isunsigned = 1; + typedata->base = BT_SHORT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vbs")) + { + typedata->isvector = 1; + typedata->isbool = 1; + typedata->base = BT_SHORT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vsi")) + { + typedata->isvector = 1; + typedata->issigned = 1; + typedata->base = BT_INT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vui")) + { + typedata->isvector = 1; + typedata->isunsigned = 1; + typedata->base = BT_INT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vbi")) + { + typedata->isvector = 1; + typedata->isbool = 1; + typedata->base = BT_INT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vsll")) + { + typedata->isvector = 1; + typedata->issigned = 1; + typedata->base = BT_LONGLONG; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vull")) + { + typedata->isvector = 1; + typedata->isunsigned = 1; + typedata->base = BT_LONGLONG; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vbll")) + { + typedata->isvector = 1; + typedata->isbool = 1; + typedata->base = BT_LONGLONG; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vsq")) + { + typedata->isvector = 1; + typedata->issigned = 1; + typedata->base = BT_INT128; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vuq")) + { + typedata->isvector = 1; + typedata->isunsigned = 1; + typedata->base = BT_INT128; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vbq")) + { + typedata->isvector = 1; + typedata->isbool = 1; + typedata->base = BT_INT128; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vp")) + { + typedata->isvector = 1; + typedata->ispixel = 1; + typedata->base = BT_SHORT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vf")) + { + typedata->isvector = 1; + typedata->base = BT_FLOAT; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "vd")) + { + typedata->isvector = 1; + typedata->base = BT_DOUBLE; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "v256")) + { + typedata->isvector = 1; + typedata->base = BT_VPAIR; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "v512")) + { + typedata->isvector = 1; + typedata->base = BT_VQUAD; + handle_pointer (typedata); + return 1; + } + else if (!strcmp (token, "signed")) + typedata->issigned = 1; + else if (!strcmp (token, "unsigned")) + typedata->isunsigned = 1; + else if (!typedata->isvoid && !typedata->isconst) + { + /* Push back token. */ + pos = oldpos; + return match_basetype (typedata); + } + + if (typedata->isvoid) + { + consume_whitespace (); + if (linebuf[pos] == '*') + { + typedata->ispointer = 1; + safe_inc_pos (); + } + else if (!voidok) + return 0; + return 1; + } + + if (!typedata->issigned && !typedata->isunsigned) + pos = oldpos; + if (!match_basetype (typedata)) + return 0; + + if (typedata->isconst) + { + if (typedata->ispointer) + return 1; + if (typedata->base != BT_INT) + { + (*diag)("'const' at %d requires pointer or integer type", + oldpos + 1); + return 0; + } + consume_whitespace (); + if (linebuf[pos] == '<' || linebuf[pos] == '{' || linebuf[pos] == '[') + return match_const_restriction (typedata); + } + + return 1; +}
next reply other threads:[~2021-03-25 15:44 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-25 15:44 William Schmidt [this message] 2021-04-01 19:47 William Schmidt 2021-04-02 22:09 William Schmidt 2021-04-26 20:48 William Schmidt 2021-06-15 17:16 William Schmidt 2021-06-25 16:15 William Schmidt
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