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 int gnat_types_compatible_p (tree, tree);
98 static const char *gnat_printable_name (tree, int);
99 static tree gnat_eh_runtime_type (tree);
100 static int gnat_eh_type_covers (tree, tree);
101 static void gnat_parse_file (int);
102 static rtx gnat_expand_expr (tree, rtx, enum machine_mode, int,
104 static void gnat_expand_body (tree);
105 static void internal_error_function (const char *, va_list *);
106 static void gnat_adjust_rli (record_layout_info);
107 static tree gnat_type_max_size (tree);
109 /* Definitions for our language-specific hooks. */
111 #undef LANG_HOOKS_NAME
112 #define LANG_HOOKS_NAME "GNU Ada"
113 #undef LANG_HOOKS_IDENTIFIER_SIZE
114 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
115 #undef LANG_HOOKS_INIT
116 #define LANG_HOOKS_INIT gnat_init
117 #undef LANG_HOOKS_INIT_OPTIONS
118 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
119 #undef LANG_HOOKS_HANDLE_OPTION
120 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
121 #undef LANG_HOOKS_POST_OPTIONS
122 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
123 #undef LANG_HOOKS_PARSE_FILE
124 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
125 #undef LANG_HOOKS_HASH_TYPES
126 #define LANG_HOOKS_HASH_TYPES false
127 #undef LANG_HOOKS_GETDECLS
128 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
129 #undef LANG_HOOKS_PUSHDECL
130 #define LANG_HOOKS_PUSHDECL lhd_return_tree
131 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
132 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL gnat_finish_incomplete_decl
133 #undef LANG_HOOKS_GET_ALIAS_SET
134 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
135 #undef LANG_HOOKS_EXPAND_EXPR
136 #define LANG_HOOKS_EXPAND_EXPR gnat_expand_expr
137 #undef LANG_HOOKS_MARK_ADDRESSABLE
138 #define LANG_HOOKS_MARK_ADDRESSABLE gnat_mark_addressable
139 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
140 #define LANG_HOOKS_TRUTHVALUE_CONVERSION gnat_truthvalue_conversion
141 #undef LANG_HOOKS_PRINT_DECL
142 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
143 #undef LANG_HOOKS_PRINT_TYPE
144 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
145 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
146 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
147 #undef LANG_HOOKS_TYPE_MAX_SIZE
148 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
149 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
150 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
151 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
152 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION gnat_expand_body
153 #undef LANG_HOOKS_GIMPLIFY_EXPR
154 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
155 #undef LANG_HOOKS_TYPE_FOR_MODE
156 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
157 #undef LANG_HOOKS_TYPE_FOR_SIZE
158 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
159 #undef LANG_HOOKS_SIGNED_TYPE
160 #define LANG_HOOKS_SIGNED_TYPE gnat_signed_type
161 #undef LANG_HOOKS_UNSIGNED_TYPE
162 #define LANG_HOOKS_UNSIGNED_TYPE gnat_unsigned_type
163 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
164 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE gnat_signed_or_unsigned_type
166 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
168 /* Tables describing GCC tree codes used only by GNAT.
170 Table indexed by tree code giving a string containing a character
171 classifying the tree code. Possibilities are
172 t, d, s, c, r, <, 1 and 2. See cp-tree.def for details. */
174 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
176 const enum tree_code_class tree_code_type[] = {
179 #include "ada-tree.def"
183 /* Table indexed by tree code giving number of expression
184 operands beyond the fixed part of the node structure.
185 Not used for types or decls. */
187 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
189 const unsigned char tree_code_length[] = {
192 #include "ada-tree.def"
196 /* Names of tree components.
197 Used for printing out the tree and error messages. */
198 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
200 const char *const tree_code_name[] = {
203 #include "ada-tree.def"
207 /* Command-line argc and argv.
208 These variables are global, since they are imported and used in
211 unsigned int save_argc;
212 const char **save_argv;
214 /* gnat standard argc argv */
216 extern int gnat_argc;
217 extern char **gnat_argv;
220 /* Declare functions we use as part of startup. */
221 extern void __gnat_initialize (void);
222 extern void adainit (void);
223 extern void _ada_gnat1drv (void);
225 /* The parser for the language. For us, we process the GNAT tree. */
228 gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
230 /* call the target specific initializations */
233 /* Call the front-end elaboration procedures */
236 /* Call the front end */
239 cgraph_finalize_compilation_unit ();
243 /* Decode all the language specific options that cannot be decoded by GCC.
244 The option decoding phase of GCC calls this routine on the flags that
245 it cannot decode. This routine returns the number of consecutive arguments
246 from ARGV that it successfully decoded; 0 indicates failure. */
249 gnat_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED)
251 const struct cl_option *option = &cl_options[scode];
252 enum opt_code code = (enum opt_code) scode;
256 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
258 error ("missing argument to \"-%s\"", option->opt_text);
268 q = xmalloc (sizeof("-I") + strlen (arg));
271 gnat_argv[gnat_argc] = q;
275 /* All front ends are expected to accept this. */
277 /* These are used in the GCC Makefile. */
278 case OPT_Wmissing_prototypes:
279 case OPT_Wstrict_prototypes:
280 case OPT_Wwrite_strings:
284 /* This is handled by the front-end. */
289 gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
294 gnat_argv[gnat_argc] = xstrdup ("-fRTS");
299 warning ("%<-gnat%> misspelled as %<-gant%>");
301 /* ... fall through ... */
304 /* Recopy the switches without the 'gnat' prefix. */
305 gnat_argv[gnat_argc] = xmalloc (strlen (arg) + 2);
306 gnat_argv[gnat_argc][0] = '-';
307 strcpy (gnat_argv[gnat_argc] + 1, arg);
311 for (i = 1; i < save_argc - 1; i++)
312 if (!strncmp (save_argv[i], "-gnatO", 6))
313 if (save_argv[++i][0] != '-')
315 /* Preserve output filename as GCC doesn't save it for GNAT. */
316 gnat_argv[gnat_argc] = xstrdup (save_argv[i]);
326 /* Initialize for option processing. */
329 gnat_init_options (unsigned int argc, const char **argv)
331 /* Initialize gnat_argv with save_argv size. */
332 gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
333 gnat_argv[0] = xstrdup (argv[0]); /* name of the command */
339 /* Uninitialized really means uninitialized in Ada. */
340 flag_zero_initialized_in_bss = 0;
345 /* Post-switch processing. */
348 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
350 flag_inline_trees = 1;
354 if (flag_inline_functions)
355 flag_inline_trees = 2;
360 /* Here is the function to handle the compiler error processing in GCC. */
363 internal_error_function (const char *msgid, va_list *ap)
365 char buffer[1000]; /* Assume this is big enough. */
367 String_Template temp;
370 vsprintf (buffer, msgid, *ap);
372 /* Go up to the first newline. */
373 for (p = buffer; *p; p++)
380 temp.Low_Bound = 1, temp.High_Bound = strlen (buffer);
381 fp.Array = buffer, fp.Bounds = &temp;
383 Current_Error_Node = error_gnat_node;
384 Compiler_Abort (fp, -1);
387 /* Perform all the initialization steps that are language-specific. */
392 /* Initialize translations and the outer statement group. */
393 gnat_init_stmt_group ();
395 /* Performs whatever initialization steps needed by the language-dependent
397 gnat_init_decl_processing ();
399 /* Add the input filename as the last argument. */
400 gnat_argv[gnat_argc] = (char *) main_input_filename;
402 gnat_argv[gnat_argc] = 0;
404 global_dc->internal_error = &internal_error_function;
406 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
407 internal_reference_types ();
409 set_lang_adjust_rli (gnat_adjust_rli);
414 /* This function is called indirectly from toplev.c to handle incomplete
415 declarations, i.e. VAR_DECL nodes whose DECL_SIZE is zero. To be precise,
416 compile_file in toplev.c makes an indirect call through the function pointer
417 incomplete_decl_finalize_hook which is initialized to this routine in
418 init_decl_processing. */
421 gnat_finish_incomplete_decl (tree dont_care ATTRIBUTE_UNUSED)
426 /* Compute the alignment of the largest mode that can be used for copying
430 gnat_compute_largest_alignment (void)
432 enum machine_mode mode;
434 for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
435 mode = GET_MODE_WIDER_MODE (mode))
436 if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
437 largest_move_alignment = MIN (BIGGEST_ALIGNMENT,
438 MAX (largest_move_alignment,
439 GET_MODE_ALIGNMENT (mode)));
442 /* If we are using the GCC mechanism to process exception handling, we
443 have to register the personality routine for Ada and to initialize
444 various language dependent hooks. */
447 gnat_init_gcc_eh (void)
449 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
450 though. This could for instance lead to the emission of tables with
451 references to symbols (such as the Ada eh personality routine) within
452 libraries we won't link against. */
453 if (No_Exception_Handlers_Set ())
456 /* Tell GCC we are handling cleanup actions through exception propagation.
457 This opens possibilities that we don't take advantage of yet, but is
458 nonetheless necessary to ensure that fixup code gets assigned to the
459 right exception regions. */
460 using_eh_for_cleanups ();
462 eh_personality_libfunc = init_one_libfunc ("__gnat_eh_personality");
463 lang_eh_type_covers = gnat_eh_type_covers;
464 lang_eh_runtime_type = gnat_eh_runtime_type;
466 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
467 the generation of the necessary exception runtime tables. The second one
468 is useful for two reasons: 1/ we map some asynchronous signals like SEGV
469 to exceptions, so we need to ensure that the insns which can lead to such
470 signals are correctly attached to the exception region they pertain to,
471 2/ Some calls to pure subprograms are handled as libcall blocks and then
472 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
473 We should not let this be since it is possible for such calls to actually
477 flag_non_call_exceptions = 1;
480 #ifdef DWARF2_UNWIND_INFO
481 if (dwarf2out_do_frame ())
482 dwarf2out_frame_init ();
486 /* Language hooks, first one to print language-specific items in a DECL. */
489 gnat_print_decl (FILE *file, tree node, int indent)
491 switch (TREE_CODE (node))
494 print_node (file, "const_corresponding_var",
495 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
499 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
509 gnat_print_type (FILE *file, tree node, int indent)
511 switch (TREE_CODE (node))
514 print_node (file, "ci_co_list", TYPE_CI_CO_LIST (node), indent + 4);
518 print_node (file, "RM size", TYPE_RM_SIZE_NUM (node), indent + 4);
522 if (TYPE_MODULAR_P (node))
523 print_node (file, "modulus", TYPE_MODULUS (node), indent + 4);
524 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
525 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
527 else if (TYPE_VAX_FLOATING_POINT_P (node))
530 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
532 print_node (file, "RM size", TYPE_RM_SIZE_NUM (node), indent + 4);
536 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
540 if (TYPE_IS_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
541 print_node (file, "unconstrained array",
542 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
544 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
548 case QUAL_UNION_TYPE:
549 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
557 /* We consider two types compatible if they have the same main variant,
558 but we also consider two array types compatible if they have the same
559 component type and bounds.
561 ??? We may also want to generalize to considering lots of integer types
562 compatible, but we need to understand the effects of alias sets first. */
565 gnat_types_compatible_p (tree x, tree y)
567 if (TREE_CODE (x) == ARRAY_TYPE && TREE_CODE (y) == ARRAY_TYPE
568 && gnat_types_compatible_p (TREE_TYPE (x), TREE_TYPE (y))
569 && operand_equal_p (TYPE_MIN_VALUE (TYPE_DOMAIN (x)),
570 TYPE_MIN_VALUE (TYPE_DOMAIN (y)), 0)
571 && operand_equal_p (TYPE_MAX_VALUE (TYPE_DOMAIN (x)),
572 TYPE_MAX_VALUE (TYPE_DOMAIN (y)), 0))
575 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
579 gnat_printable_name (tree decl, int verbosity)
581 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
582 char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
584 __gnat_decode (coded_name, ada_name, 0);
588 Set_Identifier_Casing (ada_name, (char *) DECL_SOURCE_FILE (decl));
589 ada_name = Name_Buffer;
592 return (const char *) ada_name;
595 /* Expands GNAT-specific GCC tree nodes. The only ones we support
596 here are and NULL_EXPR. */
599 gnat_expand_expr (tree exp, rtx target, enum machine_mode tmode,
600 int modifier, rtx *alt_rtl)
602 tree type = TREE_TYPE (exp);
605 /* If this is a statement, call the expansion routine for statements. */
608 gnat_expand_stmt (exp);
612 /* Update EXP to be the new expression to expand. */
613 switch (TREE_CODE (exp))
618 allocate_dynamic_stack_space
619 (expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, TYPE_MODE (sizetype),
621 NULL_RTX, tree_low_cst (TREE_OPERAND (exp, 1), 1));
624 case UNCONSTRAINED_ARRAY_REF:
625 /* If we are evaluating just for side-effects, just evaluate our
626 operand. Otherwise, abort since this code should never appear
627 in a tree to be evaluated (objects aren't unconstrained). */
628 if (target == const0_rtx || TREE_CODE (type) == VOID_TYPE)
629 return expand_expr (TREE_OPERAND (exp, 0), const0_rtx,
632 /* ... fall through ... */
638 return expand_expr_real (new, target, tmode, modifier, alt_rtl);
641 /* Generate the RTL for the body of GNU_DECL. */
644 gnat_expand_body (tree gnu_decl)
646 if (!DECL_INITIAL (gnu_decl) || DECL_INITIAL (gnu_decl) == error_mark_node)
649 tree_rest_of_compilation (gnu_decl);
652 /* Adjusts the RLI used to layout a record after all the fields have been
653 added. We only handle the packed case and cause it to use the alignment
654 that will pad the record at the end. */
657 gnat_adjust_rli (record_layout_info rli ATTRIBUTE_UNUSED)
660 /* ??? This code seems to have no actual effect; record_align should already
661 reflect the largest alignment desired by a field. jason 2003-04-01 */
662 unsigned int record_align = rli->unpadded_align;
665 /* If an alignment has been specified, don't use anything larger unless we
667 if (TYPE_ALIGN (rli->t) != 0 && TYPE_ALIGN (rli->t) < record_align)
668 record_align = MAX (rli->record_align, TYPE_ALIGN (rli->t));
670 /* If any fields have variable size, we need to force the record to be at
671 least as aligned as the alignment of that type. */
672 for (field = TYPE_FIELDS (rli->t); field; field = TREE_CHAIN (field))
673 if (TREE_CODE (DECL_SIZE_UNIT (field)) != INTEGER_CST)
674 record_align = MAX (record_align, DECL_ALIGN (field));
676 if (TYPE_PACKED (rli->t))
677 rli->record_align = record_align;
681 /* These routines are used in conjunction with GCC exception handling. */
683 /* Map compile-time to run-time tree for GCC exception handling scheme. */
686 gnat_eh_runtime_type (tree type)
691 /* Return true if type A catches type B. Callback for flow analysis from
692 the exception handling part of the back-end. */
695 gnat_eh_type_covers (tree a, tree b)
697 /* a catches b if they represent the same exception id or if a
700 ??? integer_zero_node for "others" is hardwired in too many places
702 return (a == b || a == integer_zero_node);
705 /* Get the alias set corresponding to a type or expression. */
708 gnat_get_alias_set (tree type)
710 /* If this is a padding type, use the type of the first field. */
711 if (TREE_CODE (type) == RECORD_TYPE
712 && TYPE_IS_PADDING_P (type))
713 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
715 /* If the type is an unconstrained array, use the type of the
716 self-referential array we make. */
717 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
719 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
725 /* GNU_TYPE is a type. Return its maxium size in bytes, if known. */
728 gnat_type_max_size (gnu_type)
731 return max_size (TYPE_SIZE_UNIT (gnu_type), true);
734 /* GNU_TYPE is a type. Determine if it should be passed by reference by
738 default_pass_by_ref (tree gnu_type)
740 /* We pass aggregates by reference if they are sufficiently large. The
741 choice of constant here is somewhat arbitrary. We also pass by
742 reference if the target machine would either pass or return by
743 reference. Strictly speaking, we need only check the return if this
744 is an In Out parameter, but it's probably best to err on the side of
745 passing more things by reference. */
747 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
750 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
753 if (AGGREGATE_TYPE_P (gnu_type)
754 && (!host_integerp (TYPE_SIZE (gnu_type), 1)
755 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
756 8 * TYPE_ALIGN (gnu_type))))
762 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
763 it should be passed by reference. */
766 must_pass_by_ref (tree gnu_type)
768 /* We pass only unconstrained objects, those required by the language
769 to be passed by reference, and objects of variable size. The latter
770 is more efficient, avoids problems with variable size temporaries,
771 and does not produce compatibility problems with C, since C does
772 not have such objects. */
773 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
774 || (AGGREGATE_TYPE_P (gnu_type) && TYPE_BY_REFERENCE_P (gnu_type))
775 || (TYPE_SIZE (gnu_type)
776 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
779 /* This function is called by the front end to enumerate all the supported
780 modes for the machine. We pass a function which is called back with
781 the following integer parameters:
783 FLOAT_P nonzero if this represents a floating-point mode
784 COMPLEX_P nonzero is this represents a complex mode
785 COUNT count of number of items, nonzero for vector mode
786 PRECISION number of bits in data representation
787 MANTISSA number of bits in mantissa, if FP and known, else zero.
788 SIZE number of bits used to store data
789 ALIGN number of bits to which mode is aligned. */
792 enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
796 for (i = 0; i < NUM_MACHINE_MODES; i++)
804 enum machine_mode inner_mode = i;
806 switch (GET_MODE_CLASS (i))
813 case MODE_COMPLEX_INT:
815 inner_mode = GET_MODE_INNER (i);
817 case MODE_COMPLEX_FLOAT:
820 inner_mode = GET_MODE_INNER (i);
822 case MODE_VECTOR_INT:
824 inner_mode = GET_MODE_INNER (i);
826 case MODE_VECTOR_FLOAT:
829 inner_mode = GET_MODE_INNER (i);
835 /* Skip this mode if it's one the front end doesn't need to know about
836 (e.g., the CC modes) or if there is no add insn for that mode (or
837 any wider mode), meaning it is not supported by the hardware. If
838 this a complex or vector mode, we care about the inner mode. */
839 for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
840 if (add_optab->handlers[j].insn_code != CODE_FOR_nothing)
845 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
847 mantissa = fmt->p * fmt->log2_b;
850 if (!skip_p && j != VOIDmode)
851 (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
852 GET_MODE_BITSIZE (i), mantissa,
853 GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
858 fp_prec_to_size (int prec)
860 enum machine_mode mode;
862 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
863 mode = GET_MODE_WIDER_MODE (mode))
864 if (GET_MODE_PRECISION (mode) == prec)
865 return GET_MODE_BITSIZE (mode);
871 fp_size_to_prec (int size)
873 enum machine_mode mode;
875 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
876 mode = GET_MODE_WIDER_MODE (mode))
877 if (GET_MODE_BITSIZE (mode) == size)
878 return GET_MODE_PRECISION (mode);