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-rw-r--r--gdb/ch-lang.c675
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diff --git a/gdb/ch-lang.c b/gdb/ch-lang.c
new file mode 100644
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--- /dev/null
+++ b/gdb/ch-lang.c
@@ -0,0 +1,675 @@
+/* Chill language support routines for GDB, the GNU debugger.
+ Copyright 1992, 1995, 1996 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program 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 of the License, or
+(at your option) any later version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "value.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "ch-lang.h"
+
+static value_ptr
+evaluate_subexp_chill PARAMS ((struct type *, struct expression *, int *, enum noside));
+
+static value_ptr
+value_chill_max_min PARAMS ((enum exp_opcode, value_ptr));
+
+static value_ptr
+value_chill_card PARAMS ((value_ptr));
+
+static value_ptr
+ value_chill_length PARAMS ((value_ptr));
+
+static struct type *
+chill_create_fundamental_type PARAMS ((struct objfile *, int));
+
+static void
+chill_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses));
+
+static void
+chill_printchar PARAMS ((int, GDB_FILE *));
+
+/* For now, Chill uses a simple mangling algorithm whereby you simply
+ discard everything after the occurance of two successive CPLUS_MARKER
+ characters to derive the demangled form. */
+
+char *
+chill_demangle (mangled)
+ const char *mangled;
+{
+ const char *joiner = NULL;
+ char *demangled;
+ const char *cp = mangled;
+
+ while (*cp)
+ {
+ if (is_cplus_marker (*cp))
+ {
+ joiner = cp;
+ break;
+ }
+ cp++;
+ }
+ if (joiner != NULL && *(joiner + 1) == *joiner)
+ {
+ demangled = savestring (mangled, joiner - mangled);
+ }
+ else
+ {
+ demangled = NULL;
+ }
+ return (demangled);
+}
+
+static void
+chill_printchar (c, stream)
+ register int c;
+ GDB_FILE *stream;
+{
+ c &= 0xFF; /* Avoid sign bit follies */
+
+ if (PRINT_LITERAL_FORM (c))
+ {
+ if (c == '\'' || c == '^')
+ fprintf_filtered (stream, "'%c%c'", c, c);
+ else
+ fprintf_filtered (stream, "'%c'", c);
+ }
+ else
+ {
+ fprintf_filtered (stream, "'^(%u)'", (unsigned int) c);
+ }
+}
+
+/* Print the character string STRING, printing at most LENGTH characters.
+ Printing stops early if the number hits print_max; repeat counts
+ are printed as appropriate. Print ellipses at the end if we
+ had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
+ Note that gdb maintains the length of strings without counting the
+ terminating null byte, while chill strings are typically written with
+ an explicit null byte. So we always assume an implied null byte
+ until gdb is able to maintain non-null terminated strings as well
+ as null terminated strings (FIXME).
+ */
+
+static void
+chill_printstr (stream, string, length, width, force_ellipses)
+ GDB_FILE *stream;
+ char *string;
+ unsigned int length;
+ int width;
+ int force_ellipses;
+{
+ register unsigned int i;
+ unsigned int things_printed = 0;
+ int in_literal_form = 0;
+ int in_control_form = 0;
+ int need_slashslash = 0;
+ unsigned int c;
+ extern int repeat_count_threshold;
+ extern int print_max;
+
+ if (length == 0)
+ {
+ fputs_filtered ("\"\"", stream);
+ return;
+ }
+
+ for (i = 0; i < length && things_printed < print_max; ++i)
+ {
+ /* Position of the character we are examining
+ to see whether it is repeated. */
+ unsigned int rep1;
+ /* Number of repetitions we have detected so far. */
+ unsigned int reps;
+
+ QUIT;
+
+ if (need_slashslash)
+ {
+ fputs_filtered ("//", stream);
+ need_slashslash = 0;
+ }
+
+ rep1 = i + 1;
+ reps = 1;
+ while (rep1 < length && string[rep1] == string[i])
+ {
+ ++rep1;
+ ++reps;
+ }
+
+ c = string[i];
+ if (reps > repeat_count_threshold)
+ {
+ if (in_control_form || in_literal_form)
+ {
+ if (in_control_form)
+ fputs_filtered (")", stream);
+ fputs_filtered ("\"//", stream);
+ in_control_form = in_literal_form = 0;
+ }
+ chill_printchar (c, stream);
+ fprintf_filtered (stream, "<repeats %u times>", reps);
+ i = rep1 - 1;
+ things_printed += repeat_count_threshold;
+ need_slashslash = 1;
+ }
+ else
+ {
+ if (! in_literal_form && ! in_control_form)
+ fputs_filtered ("\"", stream);
+ if (PRINT_LITERAL_FORM (c))
+ {
+ if (!in_literal_form)
+ {
+ if (in_control_form)
+ {
+ fputs_filtered (")", stream);
+ in_control_form = 0;
+ }
+ in_literal_form = 1;
+ }
+ fprintf_filtered (stream, "%c", c);
+ if (c == '"' || c == '^')
+ /* duplicate this one as must be done at input */
+ fprintf_filtered (stream, "%c", c);
+ }
+ else
+ {
+ if (!in_control_form)
+ {
+ if (in_literal_form)
+ {
+ in_literal_form = 0;
+ }
+ fputs_filtered ("^(", stream);
+ in_control_form = 1;
+ }
+ else
+ fprintf_filtered (stream, ",");
+ c = c & 0xff;
+ fprintf_filtered (stream, "%u", (unsigned int) c);
+ }
+ ++things_printed;
+ }
+ }
+
+ /* Terminate the quotes if necessary. */
+ if (in_control_form)
+ {
+ fputs_filtered (")", stream);
+ }
+ if (in_literal_form || in_control_form)
+ {
+ fputs_filtered ("\"", stream);
+ }
+ if (force_ellipses || (i < length))
+ {
+ fputs_filtered ("...", stream);
+ }
+}
+
+static struct type *
+chill_create_fundamental_type (objfile, typeid)
+ struct objfile *objfile;
+ int typeid;
+{
+ register struct type *type = NULL;
+
+ switch (typeid)
+ {
+ default:
+ /* FIXME: For now, if we are asked to produce a type not in this
+ language, create the equivalent of a C integer type with the
+ name "<?type?>". When all the dust settles from the type
+ reconstruction work, this should probably become an error. */
+ type = init_type (TYPE_CODE_INT, 2, 0, "<?type?>", objfile);
+ warning ("internal error: no chill fundamental type %d", typeid);
+ break;
+ case FT_VOID:
+ /* FIXME: Currently the GNU Chill compiler emits some DWARF entries for
+ typedefs, unrelated to anything directly in the code being compiled,
+ that have some FT_VOID types. Just fake it for now. */
+ type = init_type (TYPE_CODE_VOID, 0, 0, "<?VOID?>", objfile);
+ break;
+ case FT_BOOLEAN:
+ type = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile);
+ break;
+ case FT_CHAR:
+ type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "CHAR", objfile);
+ break;
+ case FT_SIGNED_CHAR:
+ type = init_type (TYPE_CODE_INT, 1, 0, "BYTE", objfile);
+ break;
+ case FT_UNSIGNED_CHAR:
+ type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile);
+ break;
+ case FT_SHORT: /* Chill ints are 2 bytes */
+ type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile);
+ break;
+ case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */
+ type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile);
+ break;
+ case FT_INTEGER: /* FIXME? */
+ case FT_SIGNED_INTEGER: /* FIXME? */
+ case FT_LONG: /* Chill longs are 4 bytes */
+ case FT_SIGNED_LONG: /* Chill longs are 4 bytes */
+ type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile);
+ break;
+ case FT_UNSIGNED_INTEGER: /* FIXME? */
+ case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */
+ type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile);
+ break;
+ case FT_FLOAT:
+ type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", objfile);
+ break;
+ case FT_DBL_PREC_FLOAT:
+ type = init_type (TYPE_CODE_FLT, 8, 0, "LONG_REAL", objfile);
+ break;
+ }
+ return (type);
+}
+
+
+/* Table of operators and their precedences for printing expressions. */
+
+static const struct op_print chill_op_print_tab[] = {
+ {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
+ {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
+ {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
+ {"MOD", BINOP_MOD, PREC_MUL, 0},
+ {"REM", BINOP_REM, PREC_MUL, 0},
+ {"SIZE",UNOP_SIZEOF, PREC_BUILTIN_FUNCTION, 0},
+ {"LOWER",UNOP_LOWER, PREC_BUILTIN_FUNCTION, 0},
+ {"UPPER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0},
+ {"CARD",UNOP_CARD, PREC_BUILTIN_FUNCTION, 0},
+ {"MAX",UNOP_CHMAX, PREC_BUILTIN_FUNCTION, 0},
+ {"MIN",UNOP_CHMIN, PREC_BUILTIN_FUNCTION, 0},
+ {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
+ {"=", BINOP_EQUAL, PREC_EQUAL, 0},
+ {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
+ {"<=", BINOP_LEQ, PREC_ORDER, 0},
+ {">=", BINOP_GEQ, PREC_ORDER, 0},
+ {">", BINOP_GTR, PREC_ORDER, 0},
+ {"<", BINOP_LESS, PREC_ORDER, 0},
+ {"+", BINOP_ADD, PREC_ADD, 0},
+ {"-", BINOP_SUB, PREC_ADD, 0},
+ {"*", BINOP_MUL, PREC_MUL, 0},
+ {"/", BINOP_DIV, PREC_MUL, 0},
+ {"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */
+ {"-", UNOP_NEG, PREC_PREFIX, 0},
+ {"->", UNOP_IND, PREC_SUFFIX, 1},
+ {"->", UNOP_ADDR, PREC_PREFIX, 0},
+ {":", BINOP_RANGE, PREC_ASSIGN, 0},
+ {NULL, 0, 0, 0}
+};
+
+/* The built-in types of Chill. */
+
+struct type *builtin_type_chill_bool;
+struct type *builtin_type_chill_char;
+struct type *builtin_type_chill_long;
+struct type *builtin_type_chill_ulong;
+struct type *builtin_type_chill_real;
+
+struct type ** CONST_PTR (chill_builtin_types[]) =
+{
+ &builtin_type_chill_bool,
+ &builtin_type_chill_char,
+ &builtin_type_chill_long,
+ &builtin_type_chill_ulong,
+ &builtin_type_chill_real,
+ 0
+};
+
+/* Calculate LOWER or UPPER of TYPE.
+ Returns the result as an integer.
+ *RESULT_TYPE is the appropriate type for the result. */
+
+LONGEST
+type_lower_upper (op, type, result_type)
+ enum exp_opcode op; /* Either UNOP_LOWER or UNOP_UPPER */
+ struct type *type;
+ struct type **result_type;
+{
+ LONGEST low, high;
+ *result_type = type;
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ *result_type = builtin_type_int;
+ if (chill_varying_type (type))
+ return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type);
+ break;
+ case TYPE_CODE_ARRAY:
+ case TYPE_CODE_BITSTRING:
+ case TYPE_CODE_STRING:
+ type = TYPE_FIELD_TYPE (type, 0); /* Get index type */
+
+ /* ... fall through ... */
+ case TYPE_CODE_RANGE:
+ *result_type = TYPE_TARGET_TYPE (type);
+ return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type);
+
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_INT:
+ case TYPE_CODE_CHAR:
+ if (get_discrete_bounds (type, &low, &high) >= 0)
+ {
+ *result_type = type;
+ return op == UNOP_LOWER ? low : high;
+ }
+ break;
+ case TYPE_CODE_UNDEF:
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_UNION:
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_VOID:
+ case TYPE_CODE_SET:
+ case TYPE_CODE_ERROR:
+ case TYPE_CODE_MEMBER:
+ case TYPE_CODE_METHOD:
+ case TYPE_CODE_REF:
+ case TYPE_CODE_COMPLEX:
+ default:
+ break;
+ }
+ error ("unknown mode for LOWER/UPPER builtin");
+}
+
+static value_ptr
+value_chill_length (val)
+ value_ptr val;
+{
+ LONGEST tmp;
+ struct type *type = VALUE_TYPE (val);
+ struct type *ttype;
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_ARRAY:
+ case TYPE_CODE_BITSTRING:
+ case TYPE_CODE_STRING:
+ tmp = type_lower_upper (UNOP_UPPER, type, &ttype)
+ - type_lower_upper (UNOP_LOWER, type, &ttype) + 1;
+ break;
+ case TYPE_CODE_STRUCT:
+ if (chill_varying_type (type))
+ {
+ tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val));
+ break;
+ }
+ /* ... else fall through ... */
+ default:
+ error ("bad argument to LENGTH builtin");
+ }
+ return value_from_longest (builtin_type_int, tmp);
+}
+
+static value_ptr
+value_chill_card (val)
+ value_ptr val;
+{
+ LONGEST tmp = 0;
+ struct type *type = VALUE_TYPE (val);
+ CHECK_TYPEDEF (type);
+
+ if (TYPE_CODE (type) == TYPE_CODE_SET)
+ {
+ struct type *range_type = TYPE_INDEX_TYPE (type);
+ LONGEST lower_bound, upper_bound;
+ int i;
+
+ get_discrete_bounds (range_type, &lower_bound, &upper_bound);
+ for (i = lower_bound; i <= upper_bound; i++)
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ tmp++;
+ }
+ else
+ error ("bad argument to CARD builtin");
+
+ return value_from_longest (builtin_type_int, tmp);
+}
+
+static value_ptr
+value_chill_max_min (op, val)
+ enum exp_opcode op;
+ value_ptr val;
+{
+ LONGEST tmp = 0;
+ struct type *type = VALUE_TYPE (val);
+ struct type *elttype;
+ CHECK_TYPEDEF (type);
+
+ if (TYPE_CODE (type) == TYPE_CODE_SET)
+ {
+ LONGEST lower_bound, upper_bound;
+ int i, empty = 1;
+
+ elttype = TYPE_INDEX_TYPE (type);
+ CHECK_TYPEDEF (elttype);
+ get_discrete_bounds (elttype, &lower_bound, &upper_bound);
+
+ if (op == UNOP_CHMAX)
+ {
+ for (i = upper_bound; i >= lower_bound; i--)
+ {
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ {
+ tmp = i;
+ empty = 0;
+ break;
+ }
+ }
+ }
+ else
+ {
+ for (i = lower_bound; i <= upper_bound; i++)
+ {
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ {
+ tmp = i;
+ empty = 0;
+ break;
+ }
+ }
+ }
+ if (empty)
+ error ("%s for empty powerset", op == UNOP_CHMAX ? "MAX" : "MIN");
+ }
+ else
+ error ("bad argument to %s builtin", op == UNOP_CHMAX ? "MAX" : "MIN");
+
+ return value_from_longest (TYPE_CODE (elttype) == TYPE_CODE_RANGE
+ ? TYPE_TARGET_TYPE (elttype)
+ : elttype,
+ tmp);
+}
+
+static value_ptr
+evaluate_subexp_chill (expect_type, exp, pos, noside)
+ struct type *expect_type;
+ register struct expression *exp;
+ register int *pos;
+ enum noside noside;
+{
+ int pc = *pos;
+ struct type *type;
+ int tem, nargs;
+ value_ptr arg1;
+ value_ptr *argvec;
+ enum exp_opcode op = exp->elts[*pos].opcode;
+ switch (op)
+ {
+ case MULTI_SUBSCRIPT:
+ if (noside == EVAL_SKIP)
+ break;
+ (*pos) += 3;
+ nargs = longest_to_int (exp->elts[pc + 1].longconst);
+ arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
+ type = check_typedef (VALUE_TYPE (arg1));
+
+ if (nargs == 1 && TYPE_CODE (type) == TYPE_CODE_INT)
+ {
+ /* Looks like string repetition. */
+ value_ptr string = evaluate_subexp_with_coercion (exp, pos, noside);
+ return value_concat (arg1, string);
+ }
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_PTR:
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+ if (!type || TYPE_CODE (type) != TYPE_CODE_FUNC)
+ error ("reference value used as function");
+ /* ... fall through ... */
+ case TYPE_CODE_FUNC:
+ /* It's a function call. */
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ break;
+
+ /* Allocate arg vector, including space for the function to be
+ called in argvec[0] and a terminating NULL */
+ argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2));
+ argvec[0] = arg1;
+ tem = 1;
+ for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
+ {
+ argvec[tem]
+ = evaluate_subexp_chill (TYPE_FIELD_TYPE (type, tem-1),
+ exp, pos, noside);
+ }
+ for (; tem <= nargs; tem++)
+ argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
+ argvec[tem] = 0; /* signal end of arglist */
+
+ return call_function_by_hand (argvec[0], nargs, argvec + 1);
+ default:
+ break;
+ }
+
+ while (nargs-- > 0)
+ {
+ value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside);
+ arg1 = value_subscript (arg1, index);
+ }
+ return (arg1);
+
+ case UNOP_LOWER:
+ case UNOP_UPPER:
+ (*pos)++;
+ if (noside == EVAL_SKIP)
+ {
+ (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP);
+ goto nosideret;
+ }
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos,
+ EVAL_AVOID_SIDE_EFFECTS);
+ tem = type_lower_upper (op, VALUE_TYPE (arg1), &type);
+ return value_from_longest (type, tem);
+
+ case UNOP_LENGTH:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_length (arg1);
+
+ case UNOP_CARD:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_card (arg1);
+
+ case UNOP_CHMAX:
+ case UNOP_CHMIN:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_max_min (op, arg1);
+
+ case BINOP_COMMA:
+ error ("',' operator used in invalid context");
+
+ default:
+ break;
+ }
+
+ return evaluate_subexp_standard (expect_type, exp, pos, noside);
+ nosideret:
+ return value_from_longest (builtin_type_long, (LONGEST) 1);
+}
+
+const struct language_defn chill_language_defn = {
+ "chill",
+ language_chill,
+ chill_builtin_types,
+ range_check_on,
+ type_check_on,
+ chill_parse, /* parser */
+ chill_error, /* parser error function */
+ evaluate_subexp_chill,
+ chill_printchar, /* print a character constant */
+ chill_printstr, /* function to print a string constant */
+ NULL, /* Function to print a single char */
+ chill_create_fundamental_type,/* Create fundamental type in this language */
+ chill_print_type, /* Print a type using appropriate syntax */
+ chill_val_print, /* Print a value using appropriate syntax */
+ chill_value_print, /* Print a top-levl value */
+ {"", "B'", "", ""}, /* Binary format info */
+ {"O'%lo", "O'", "o", ""}, /* Octal format info */
+ {"D'%ld", "D'", "d", ""}, /* Decimal format info */
+ {"H'%lx", "H'", "x", ""}, /* Hex format info */
+ chill_op_print_tab, /* expression operators for printing */
+ 0, /* arrays are first-class (not c-style) */
+ 0, /* String lower bound */
+ &builtin_type_chill_char, /* Type of string elements */
+ LANG_MAGIC
+};
+
+/* Initialization for Chill */
+
+void
+_initialize_chill_language ()
+{
+ builtin_type_chill_bool =
+ init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED,
+ "BOOL", (struct objfile *) NULL);
+ builtin_type_chill_char =
+ init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED,
+ "CHAR", (struct objfile *) NULL);
+ builtin_type_chill_long =
+ init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
+ 0,
+ "LONG", (struct objfile *) NULL);
+ builtin_type_chill_ulong =
+ init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED,
+ "ULONG", (struct objfile *) NULL);
+ builtin_type_chill_real =
+ init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0,
+ "LONG_REAL", (struct objfile *) NULL);
+
+ add_language (&chill_language_defn);
+}