1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2004 Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 2, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
17 * for more details. You should have received a copy of the GNU General *
18 * Public License distributed with GNAT; see file COPYING. If not, write *
19 * to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, *
20 * MA 02111-1307, USA. *
22 * As a special exception, if you link this file with other files to *
23 * produce an executable, this file does not by itself cause the resulting *
24 * executable to be covered by the GNU General Public License. This except- *
25 * ion does not however invalidate any other reasons why the executable *
26 * file might be covered by the GNU Public License. *
28 * GNAT was originally developed by the GNAT team at New York University. *
29 * Extensive contributions were provided by Ada Core Technologies Inc. *
31 ****************************************************************************/
33 /* This file contains parts of the compiler that are required for interfacing
34 with GCC but otherwise do nothing and parts of Gigi that need to know
39 #include "coretypes.h"
45 #include "diagnostic.h"
52 #include "tree-inline.h"
53 #include "insn-codes.h"
54 #include "insn-flags.h"
55 #include "insn-config.h"
62 #include "langhooks.h"
63 #include "langhooks-def.h"
79 #include "adadecode.h"
83 extern FILE *asm_out_file;
85 /* The largest alignment, in bits, that is needed for using the widest
87 unsigned int largest_move_alignment;
89 static bool gnat_init (void);
90 static void gnat_finish_incomplete_decl (tree);
91 static unsigned int gnat_init_options (unsigned int, const char **);
92 static int gnat_handle_option (size_t, const char *, int);
93 static bool gnat_post_options (const char **);
94 static HOST_WIDE_INT gnat_get_alias_set (tree);
95 static void gnat_print_decl (FILE *, tree, int);
96 static void gnat_print_type (FILE *, tree, int);
97 static const char *gnat_printable_name (tree, int);
98 static tree gnat_eh_runtime_type (tree);
99 static int gnat_eh_type_covers (tree, tree);
100 static void gnat_parse_file (int);
101 static rtx gnat_expand_expr (tree, rtx, enum machine_mode, int,
103 static void internal_error_function (const char *, va_list *);
104 static void gnat_adjust_rli (record_layout_info);
106 /* Definitions for our language-specific hooks. */
108 #undef LANG_HOOKS_NAME
109 #define LANG_HOOKS_NAME "GNU Ada"
110 #undef LANG_HOOKS_IDENTIFIER_SIZE
111 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
112 #undef LANG_HOOKS_INIT
113 #define LANG_HOOKS_INIT gnat_init
114 #undef LANG_HOOKS_INIT_OPTIONS
115 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
116 #undef LANG_HOOKS_HANDLE_OPTION
117 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
118 #undef LANG_HOOKS_POST_OPTIONS
119 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
120 #undef LANG_HOOKS_PARSE_FILE
121 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
122 #undef LANG_HOOKS_HONOR_READONLY
123 #define LANG_HOOKS_HONOR_READONLY true
124 #undef LANG_HOOKS_HASH_TYPES
125 #define LANG_HOOKS_HASH_TYPES false
126 #undef LANG_HOOKS_CLEAR_BINDING_STACK
127 #define LANG_HOOKS_CLEAR_BINDING_STACK lhd_do_nothing
128 #undef LANG_HOOKS_PUSHLEVEL
129 #define LANG_HOOKS_PUSHLEVEL lhd_do_nothing_i
130 #undef LANG_HOOKS_POPLEVEL
131 #define LANG_HOOKS_POPLEVEL lhd_do_nothing_iii_return_null_tree
132 #undef LANG_HOOKS_SET_BLOCK
133 #define LANG_HOOKS_SET_BLOCK lhd_do_nothing_t
134 #undef LANG_HOOKS_GETDECLS
135 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
136 #undef LANG_HOOKS_PUSHDECL
137 #define LANG_HOOKS_PUSHDECL lhd_return_tree
138 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
139 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL gnat_finish_incomplete_decl
140 #undef LANG_HOOKS_GET_ALIAS_SET
141 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
142 #undef LANG_HOOKS_EXPAND_EXPR
143 #define LANG_HOOKS_EXPAND_EXPR gnat_expand_expr
144 #undef LANG_HOOKS_MARK_ADDRESSABLE
145 #define LANG_HOOKS_MARK_ADDRESSABLE gnat_mark_addressable
146 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
147 #define LANG_HOOKS_TRUTHVALUE_CONVERSION gnat_truthvalue_conversion
148 #undef LANG_HOOKS_PRINT_DECL
149 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
150 #undef LANG_HOOKS_PRINT_TYPE
151 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
152 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
153 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
154 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
155 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION gnat_expand_body
156 #undef LANG_HOOKS_RTL_EXPAND_STMT
157 #define LANG_HOOKS_RTL_EXPAND_STMT gnat_expand_stmt
158 #undef LANG_HOOKS_GIMPLIFY_EXPR
159 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
161 #undef LANG_HOOKS_TYPE_FOR_MODE
162 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
163 #undef LANG_HOOKS_TYPE_FOR_SIZE
164 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
165 #undef LANG_HOOKS_SIGNED_TYPE
166 #define LANG_HOOKS_SIGNED_TYPE gnat_signed_type
167 #undef LANG_HOOKS_UNSIGNED_TYPE
168 #define LANG_HOOKS_UNSIGNED_TYPE gnat_unsigned_type
169 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
170 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE gnat_signed_or_unsigned_type
172 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
174 /* Tables describing GCC tree codes used only by GNAT.
176 Table indexed by tree code giving a string containing a character
177 classifying the tree code. Possibilities are
178 t, d, s, c, r, <, 1 and 2. See cp-tree.def for details. */
180 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
182 const char tree_code_type[] = {
185 #include "ada-tree.def"
189 /* Table indexed by tree code giving number of expression
190 operands beyond the fixed part of the node structure.
191 Not used for types or decls. */
193 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
195 const unsigned char tree_code_length[] = {
198 #include "ada-tree.def"
202 /* Names of tree components.
203 Used for printing out the tree and error messages. */
204 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
206 const char *const tree_code_name[] = {
209 #include "ada-tree.def"
213 /* Command-line argc and argv.
214 These variables are global, since they are imported and used in
217 unsigned int save_argc;
218 const char **save_argv;
220 /* gnat standard argc argv */
222 extern int gnat_argc;
223 extern char **gnat_argv;
226 /* Declare functions we use as part of startup. */
227 extern void __gnat_initialize (void);
228 extern void adainit (void);
229 extern void _ada_gnat1drv (void);
231 /* The parser for the language. For us, we process the GNAT tree. */
234 gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
236 /* call the target specific initializations */
239 /* Call the front-end elaboration procedures */
242 /* Call the front end */
245 cgraph_finalize_compilation_unit ();
249 /* Decode all the language specific options that cannot be decoded by GCC.
250 The option decoding phase of GCC calls this routine on the flags that
251 it cannot decode. This routine returns the number of consecutive arguments
252 from ARGV that it successfully decoded; 0 indicates failure. */
255 gnat_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED)
257 const struct cl_option *option = &cl_options[scode];
258 enum opt_code code = (enum opt_code) scode;
262 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
264 error ("missing argument to \"-%s\"", option->opt_text);
274 q = xmalloc (sizeof("-I") + strlen (arg));
277 gnat_argv[gnat_argc] = q;
281 /* All front ends are expected to accept this. */
283 /* These are used in the GCC Makefile. */
284 case OPT_Wmissing_prototypes:
285 case OPT_Wstrict_prototypes:
286 case OPT_Wwrite_strings:
290 /* This is handled by the front-end. */
295 gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
300 gnat_argv[gnat_argc] = xstrdup ("-fRTS");
305 warning ("`-gnat' misspelled as `-gant'");
307 /* ... fall through ... */
310 /* Recopy the switches without the 'gnat' prefix. */
311 gnat_argv[gnat_argc] = xmalloc (strlen (arg) + 2);
312 gnat_argv[gnat_argc][0] = '-';
313 strcpy (gnat_argv[gnat_argc] + 1, arg);
317 for (i = 1; i < save_argc - 1; i++)
318 if (!strncmp (save_argv[i], "-gnatO", 6))
319 if (save_argv[++i][0] != '-')
321 /* Preserve output filename as GCC doesn't save it for GNAT. */
322 gnat_argv[gnat_argc] = xstrdup (save_argv[i]);
332 /* Initialize for option processing. */
335 gnat_init_options (unsigned int argc, const char **argv)
337 /* Initialize gnat_argv with save_argv size. */
338 gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
339 gnat_argv[0] = xstrdup (argv[0]); /* name of the command */
345 /* Uninitialized really means uninitialized in Ada. */
346 flag_zero_initialized_in_bss = 0;
351 /* Post-switch processing. */
354 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
356 flag_inline_trees = 1;
360 if (flag_inline_functions)
362 flag_inline_trees = 2;
363 flag_inline_functions = 0;
369 /* Here is the function to handle the compiler error processing in GCC. */
372 internal_error_function (const char *msgid, va_list *ap)
374 char buffer[1000]; /* Assume this is big enough. */
376 String_Template temp;
379 vsprintf (buffer, msgid, *ap);
381 /* Go up to the first newline. */
382 for (p = buffer; *p != 0; p++)
389 temp.Low_Bound = 1, temp.High_Bound = strlen (buffer);
390 fp.Array = buffer, fp.Bounds = &temp;
392 Current_Error_Node = error_gnat_node;
393 Compiler_Abort (fp, -1);
396 /* Perform all the initialization steps that are language-specific. */
401 /* Initialize translations and the outer statement group. */
402 gnat_init_stmt_group ();
404 /* Performs whatever initialization steps needed by the language-dependent
406 gnat_init_decl_processing ();
408 /* Add the input filename as the last argument. */
409 gnat_argv[gnat_argc] = (char *) main_input_filename;
411 gnat_argv[gnat_argc] = 0;
413 global_dc->internal_error = &internal_error_function;
415 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
416 internal_reference_types ();
418 set_lang_adjust_rli (gnat_adjust_rli);
423 /* This function is called indirectly from toplev.c to handle incomplete
424 declarations, i.e. VAR_DECL nodes whose DECL_SIZE is zero. To be precise,
425 compile_file in toplev.c makes an indirect call through the function pointer
426 incomplete_decl_finalize_hook which is initialized to this routine in
427 init_decl_processing. */
430 gnat_finish_incomplete_decl (tree dont_care ATTRIBUTE_UNUSED)
435 /* Compute the alignment of the largest mode that can be used for copying
439 gnat_compute_largest_alignment (void)
441 enum machine_mode mode;
443 for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
444 mode = GET_MODE_WIDER_MODE (mode))
445 if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
446 largest_move_alignment = MIN (BIGGEST_ALIGNMENT,
447 MAX (largest_move_alignment,
448 GET_MODE_ALIGNMENT (mode)));
451 /* If we are using the GCC mechanism to process exception handling, we
452 have to register the personality routine for Ada and to initialize
453 various language dependent hooks. */
456 gnat_init_gcc_eh (void)
458 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
459 though. This could for instance lead to the emission of tables with
460 references to symbols (such as the Ada eh personality routine) within
461 libraries we won't link against. */
462 if (No_Exception_Handlers_Set ())
465 /* Tell GCC we are handling cleanup actions through exception propagation.
466 This opens possibilities that we don't take advantage of yet, but is
467 nonetheless necessary to ensure that fixup code gets assigned to the
468 right exception regions. */
469 using_eh_for_cleanups ();
471 eh_personality_libfunc = init_one_libfunc ("__gnat_eh_personality");
472 lang_eh_type_covers = gnat_eh_type_covers;
473 lang_eh_runtime_type = gnat_eh_runtime_type;
475 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
476 the generation of the necessary exception runtime tables. The second one
477 is useful for two reasons: 1/ we map some asynchronous signals like SEGV
478 to exceptions, so we need to ensure that the insns which can lead to such
479 signals are correctly attached to the exception region they pertain to,
480 2/ Some calls to pure subprograms are handled as libcall blocks and then
481 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
482 We should not let this be since it is possible for such calls to actually
486 flag_non_call_exceptions = 1;
489 #ifdef DWARF2_UNWIND_INFO
490 if (dwarf2out_do_frame ())
491 dwarf2out_frame_init ();
495 /* Language hooks, first one to print language-specific items in a DECL. */
498 gnat_print_decl (FILE *file, tree node, int indent)
500 switch (TREE_CODE (node))
503 print_node (file, "const_corresponding_var",
504 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
508 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
518 gnat_print_type (FILE *file, tree node, int indent)
520 switch (TREE_CODE (node))
523 print_node (file, "ci_co_list", TYPE_CI_CO_LIST (node), indent + 4);
527 print_node (file, "RM size", TYPE_RM_SIZE_ENUM (node), indent + 4);
531 if (TYPE_MODULAR_P (node))
532 print_node (file, "modulus", TYPE_MODULUS (node), indent + 4);
533 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
534 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
536 else if (TYPE_VAX_FLOATING_POINT_P (node))
539 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
541 print_node (file, "RM size", TYPE_RM_SIZE_INT (node), indent + 4);
545 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
549 if (TYPE_IS_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
550 print_node (file, "unconstrained array",
551 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
553 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
557 case QUAL_UNION_TYPE:
558 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
567 gnat_printable_name (tree decl, int verbosity)
569 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
570 char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
572 __gnat_decode (coded_name, ada_name, 0);
576 Set_Identifier_Casing (ada_name, (char *) DECL_SOURCE_FILE (decl));
577 ada_name = Name_Buffer;
580 return (const char *) ada_name;
583 /* Expands GNAT-specific GCC tree nodes. The only ones we support
584 here are and NULL_EXPR. */
587 gnat_expand_expr (tree exp, rtx target, enum machine_mode tmode,
588 int modifier, rtx *alt_rtl)
590 tree type = TREE_TYPE (exp);
593 /* If this is a statement, call the expansion routine for statements. */
596 gnat_expand_stmt (exp);
600 /* Update EXP to be the new expression to expand. */
601 switch (TREE_CODE (exp))
606 allocate_dynamic_stack_space
607 (expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, TYPE_MODE (sizetype),
609 NULL_RTX, tree_low_cst (TREE_OPERAND (exp, 1), 1));
612 case UNCONSTRAINED_ARRAY_REF:
613 /* If we are evaluating just for side-effects, just evaluate our
614 operand. Otherwise, abort since this code should never appear
615 in a tree to be evaluated (objects aren't unconstrained). */
616 if (target == const0_rtx || TREE_CODE (type) == VOID_TYPE)
617 return expand_expr (TREE_OPERAND (exp, 0), const0_rtx,
620 /* ... fall through ... */
626 return expand_expr_real (new, target, tmode, modifier, alt_rtl);
629 /* Adjusts the RLI used to layout a record after all the fields have been
630 added. We only handle the packed case and cause it to use the alignment
631 that will pad the record at the end. */
634 gnat_adjust_rli (record_layout_info rli ATTRIBUTE_UNUSED)
637 /* ??? This code seems to have no actual effect; record_align should already
638 reflect the largest alignment desired by a field. jason 2003-04-01 */
639 unsigned int record_align = rli->unpadded_align;
642 /* If an alignment has been specified, don't use anything larger unless we
644 if (TYPE_ALIGN (rli->t) != 0 && TYPE_ALIGN (rli->t) < record_align)
645 record_align = MAX (rli->record_align, TYPE_ALIGN (rli->t));
647 /* If any fields have variable size, we need to force the record to be at
648 least as aligned as the alignment of that type. */
649 for (field = TYPE_FIELDS (rli->t); field; field = TREE_CHAIN (field))
650 if (TREE_CODE (DECL_SIZE_UNIT (field)) != INTEGER_CST)
651 record_align = MAX (record_align, DECL_ALIGN (field));
653 if (TYPE_PACKED (rli->t))
654 rli->record_align = record_align;
658 /* These routines are used in conjunction with GCC exception handling. */
660 /* Map compile-time to run-time tree for GCC exception handling scheme. */
663 gnat_eh_runtime_type (tree type)
668 /* Return true if type A catches type B. Callback for flow analysis from
669 the exception handling part of the back-end. */
672 gnat_eh_type_covers (tree a, tree b)
674 /* a catches b if they represent the same exception id or if a
677 ??? integer_zero_node for "others" is hardwired in too many places
679 return (a == b || a == integer_zero_node);
682 /* Get the alias set corresponding to a type or expression. */
685 gnat_get_alias_set (tree type)
687 /* If this is a padding type, use the type of the first field. */
688 if (TREE_CODE (type) == RECORD_TYPE
689 && TYPE_IS_PADDING_P (type))
690 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
692 /* If the type is an unconstrained array, use the type of the
693 self-referential array we make. */
694 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
696 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
702 /* GNU_TYPE is a type. Determine if it should be passed by reference by
706 default_pass_by_ref (tree gnu_type)
710 INIT_CUMULATIVE_ARGS (cum, NULL_TREE, NULL_RTX, 0, 2);
712 /* We pass aggregates by reference if they are sufficiently large. The
713 choice of constant here is somewhat arbitrary. We also pass by
714 reference if the target machine would either pass or return by
715 reference. Strictly speaking, we need only check the return if this
716 is an In Out parameter, but it's probably best to err on the side of
717 passing more things by reference. */
719 #ifdef FUNCTION_ARG_PASS_BY_REFERENCE
720 || FUNCTION_ARG_PASS_BY_REFERENCE (cum, TYPE_MODE (gnu_type),
723 || targetm.calls.return_in_memory (gnu_type, NULL_TREE)
724 || (AGGREGATE_TYPE_P (gnu_type)
725 && (! host_integerp (TYPE_SIZE (gnu_type), 1)
726 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
727 8 * TYPE_ALIGN (gnu_type)))));
730 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
731 it should be passed by reference. */
734 must_pass_by_ref (tree gnu_type)
736 /* We pass only unconstrained objects, those required by the language
737 to be passed by reference, and objects of variable size. The latter
738 is more efficient, avoids problems with variable size temporaries,
739 and does not produce compatibility problems with C, since C does
740 not have such objects. */
741 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
742 || (AGGREGATE_TYPE_P (gnu_type) && TYPE_BY_REFERENCE_P (gnu_type))
743 || (TYPE_SIZE (gnu_type) != 0
744 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
747 /* This function is called by the front end to enumerate all the supported
748 modes for the machine. We pass a function which is called back with
749 the following integer parameters:
751 FLOAT_P nonzero if this represents a floating-point mode
752 COMPLEX_P nonzero is this represents a complex mode
753 COUNT count of number of items, nonzero for vector mode
754 PRECISION number of bits in data representation
755 MANTISSA number of bits in mantissa, if FP and known, else zero.
756 SIZE number of bits used to store data
757 ALIGN number of bits to which mode is aligned. */
760 enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
764 for (i = 0; i < NUM_MACHINE_MODES; i++)
772 enum machine_mode inner_mode = i;
774 switch (GET_MODE_CLASS (i))
781 case MODE_COMPLEX_INT:
783 inner_mode = GET_MODE_INNER (i);
785 case MODE_COMPLEX_FLOAT:
788 inner_mode = GET_MODE_INNER (i);
790 case MODE_VECTOR_INT:
792 inner_mode = GET_MODE_INNER (i);
794 case MODE_VECTOR_FLOAT:
797 inner_mode = GET_MODE_INNER (i);
803 /* Skip this mode if it's one the front end doesn't need to know about
804 (e.g., the CC modes) or if there is no add insn for that mode (or
805 any wider mode), meaning it is not supported by the hardware. If
806 this a complex or vector mode, we care about the inner mode. */
807 for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
808 if (add_optab->handlers[j].insn_code != CODE_FOR_nothing)
813 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
815 mantissa = fmt->p * fmt->log2_b;
818 if (!skip_p && j != VOIDmode)
819 (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
820 GET_MODE_BITSIZE (i), mantissa,
821 GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
826 fp_prec_to_size (int prec)
828 enum machine_mode mode;
830 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
831 mode = GET_MODE_WIDER_MODE (mode))
832 if (GET_MODE_PRECISION (mode) == prec)
833 return GET_MODE_BITSIZE (mode);
839 fp_size_to_prec (int size)
841 enum machine_mode mode;
843 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
844 mode = GET_MODE_WIDER_MODE (mode))
845 if (GET_MODE_BITSIZE (mode) == size)
846 return GET_MODE_PRECISION (mode);