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 internal_error_function (const char *, va_list *);
105 static void gnat_adjust_rli (record_layout_info);
106 static tree gnat_type_max_size (tree);
108 /* Definitions for our language-specific hooks. */
110 #undef LANG_HOOKS_NAME
111 #define LANG_HOOKS_NAME "GNU Ada"
112 #undef LANG_HOOKS_IDENTIFIER_SIZE
113 #define LANG_HOOKS_IDENTIFIER_SIZE sizeof (struct tree_identifier)
114 #undef LANG_HOOKS_INIT
115 #define LANG_HOOKS_INIT gnat_init
116 #undef LANG_HOOKS_INIT_OPTIONS
117 #define LANG_HOOKS_INIT_OPTIONS gnat_init_options
118 #undef LANG_HOOKS_HANDLE_OPTION
119 #define LANG_HOOKS_HANDLE_OPTION gnat_handle_option
120 #undef LANG_HOOKS_POST_OPTIONS
121 #define LANG_HOOKS_POST_OPTIONS gnat_post_options
122 #undef LANG_HOOKS_PARSE_FILE
123 #define LANG_HOOKS_PARSE_FILE gnat_parse_file
124 #undef LANG_HOOKS_HONOR_READONLY
125 #define LANG_HOOKS_HONOR_READONLY true
126 #undef LANG_HOOKS_HASH_TYPES
127 #define LANG_HOOKS_HASH_TYPES false
128 #undef LANG_HOOKS_GETDECLS
129 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
130 #undef LANG_HOOKS_PUSHDECL
131 #define LANG_HOOKS_PUSHDECL lhd_return_tree
132 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
133 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL gnat_finish_incomplete_decl
134 #undef LANG_HOOKS_GET_ALIAS_SET
135 #define LANG_HOOKS_GET_ALIAS_SET gnat_get_alias_set
136 #undef LANG_HOOKS_EXPAND_EXPR
137 #define LANG_HOOKS_EXPAND_EXPR gnat_expand_expr
138 #undef LANG_HOOKS_MARK_ADDRESSABLE
139 #define LANG_HOOKS_MARK_ADDRESSABLE gnat_mark_addressable
140 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
141 #define LANG_HOOKS_TRUTHVALUE_CONVERSION gnat_truthvalue_conversion
142 #undef LANG_HOOKS_PRINT_DECL
143 #define LANG_HOOKS_PRINT_DECL gnat_print_decl
144 #undef LANG_HOOKS_PRINT_TYPE
145 #define LANG_HOOKS_PRINT_TYPE gnat_print_type
146 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
147 #define LANG_HOOKS_TYPES_COMPATIBLE_P gnat_types_compatible_p
148 #undef LANG_HOOKS_TYPE_MAX_SIZE
149 #define LANG_HOOKS_TYPE_MAX_SIZE gnat_type_max_size
150 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
151 #define LANG_HOOKS_DECL_PRINTABLE_NAME gnat_printable_name
152 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
153 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION gnat_expand_body
154 #undef LANG_HOOKS_RTL_EXPAND_STMT
155 #define LANG_HOOKS_RTL_EXPAND_STMT gnat_expand_stmt
156 #undef LANG_HOOKS_GIMPLIFY_EXPR
157 #define LANG_HOOKS_GIMPLIFY_EXPR gnat_gimplify_expr
159 #undef LANG_HOOKS_TYPE_FOR_MODE
160 #define LANG_HOOKS_TYPE_FOR_MODE gnat_type_for_mode
161 #undef LANG_HOOKS_TYPE_FOR_SIZE
162 #define LANG_HOOKS_TYPE_FOR_SIZE gnat_type_for_size
163 #undef LANG_HOOKS_SIGNED_TYPE
164 #define LANG_HOOKS_SIGNED_TYPE gnat_signed_type
165 #undef LANG_HOOKS_UNSIGNED_TYPE
166 #define LANG_HOOKS_UNSIGNED_TYPE gnat_unsigned_type
167 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
168 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE gnat_signed_or_unsigned_type
170 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
172 /* Tables describing GCC tree codes used only by GNAT.
174 Table indexed by tree code giving a string containing a character
175 classifying the tree code. Possibilities are
176 t, d, s, c, r, <, 1 and 2. See cp-tree.def for details. */
178 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
180 const char tree_code_type[] = {
183 #include "ada-tree.def"
187 /* Table indexed by tree code giving number of expression
188 operands beyond the fixed part of the node structure.
189 Not used for types or decls. */
191 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
193 const unsigned char tree_code_length[] = {
196 #include "ada-tree.def"
200 /* Names of tree components.
201 Used for printing out the tree and error messages. */
202 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
204 const char *const tree_code_name[] = {
207 #include "ada-tree.def"
211 /* Command-line argc and argv.
212 These variables are global, since they are imported and used in
215 unsigned int save_argc;
216 const char **save_argv;
218 /* gnat standard argc argv */
220 extern int gnat_argc;
221 extern char **gnat_argv;
224 /* Declare functions we use as part of startup. */
225 extern void __gnat_initialize (void);
226 extern void adainit (void);
227 extern void _ada_gnat1drv (void);
229 /* The parser for the language. For us, we process the GNAT tree. */
232 gnat_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
234 /* call the target specific initializations */
237 /* Call the front-end elaboration procedures */
240 /* Call the front end */
243 cgraph_finalize_compilation_unit ();
247 /* Decode all the language specific options that cannot be decoded by GCC.
248 The option decoding phase of GCC calls this routine on the flags that
249 it cannot decode. This routine returns the number of consecutive arguments
250 from ARGV that it successfully decoded; 0 indicates failure. */
253 gnat_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED)
255 const struct cl_option *option = &cl_options[scode];
256 enum opt_code code = (enum opt_code) scode;
260 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
262 error ("missing argument to \"-%s\"", option->opt_text);
272 q = xmalloc (sizeof("-I") + strlen (arg));
275 gnat_argv[gnat_argc] = q;
279 /* All front ends are expected to accept this. */
281 /* These are used in the GCC Makefile. */
282 case OPT_Wmissing_prototypes:
283 case OPT_Wstrict_prototypes:
284 case OPT_Wwrite_strings:
288 /* This is handled by the front-end. */
293 gnat_argv[gnat_argc] = xstrdup ("-nostdlib");
298 gnat_argv[gnat_argc] = xstrdup ("-fRTS");
303 warning ("`-gnat' misspelled as `-gant'");
305 /* ... fall through ... */
308 /* Recopy the switches without the 'gnat' prefix. */
309 gnat_argv[gnat_argc] = xmalloc (strlen (arg) + 2);
310 gnat_argv[gnat_argc][0] = '-';
311 strcpy (gnat_argv[gnat_argc] + 1, arg);
315 for (i = 1; i < save_argc - 1; i++)
316 if (!strncmp (save_argv[i], "-gnatO", 6))
317 if (save_argv[++i][0] != '-')
319 /* Preserve output filename as GCC doesn't save it for GNAT. */
320 gnat_argv[gnat_argc] = xstrdup (save_argv[i]);
330 /* Initialize for option processing. */
333 gnat_init_options (unsigned int argc, const char **argv)
335 /* Initialize gnat_argv with save_argv size. */
336 gnat_argv = (char **) xmalloc ((argc + 1) * sizeof (argv[0]));
337 gnat_argv[0] = xstrdup (argv[0]); /* name of the command */
343 /* Uninitialized really means uninitialized in Ada. */
344 flag_zero_initialized_in_bss = 0;
349 /* Post-switch processing. */
352 gnat_post_options (const char **pfilename ATTRIBUTE_UNUSED)
354 flag_inline_trees = 1;
358 if (flag_inline_functions)
360 flag_inline_trees = 2;
361 flag_inline_functions = 0;
367 /* Here is the function to handle the compiler error processing in GCC. */
370 internal_error_function (const char *msgid, va_list *ap)
372 char buffer[1000]; /* Assume this is big enough. */
374 String_Template temp;
377 vsprintf (buffer, msgid, *ap);
379 /* Go up to the first newline. */
380 for (p = buffer; *p != 0; p++)
387 temp.Low_Bound = 1, temp.High_Bound = strlen (buffer);
388 fp.Array = buffer, fp.Bounds = &temp;
390 Current_Error_Node = error_gnat_node;
391 Compiler_Abort (fp, -1);
394 /* Perform all the initialization steps that are language-specific. */
399 /* Initialize translations and the outer statement group. */
400 gnat_init_stmt_group ();
402 /* Performs whatever initialization steps needed by the language-dependent
404 gnat_init_decl_processing ();
406 /* Add the input filename as the last argument. */
407 gnat_argv[gnat_argc] = (char *) main_input_filename;
409 gnat_argv[gnat_argc] = 0;
411 global_dc->internal_error = &internal_error_function;
413 /* Show that REFERENCE_TYPEs are internal and should be Pmode. */
414 internal_reference_types ();
416 set_lang_adjust_rli (gnat_adjust_rli);
421 /* This function is called indirectly from toplev.c to handle incomplete
422 declarations, i.e. VAR_DECL nodes whose DECL_SIZE is zero. To be precise,
423 compile_file in toplev.c makes an indirect call through the function pointer
424 incomplete_decl_finalize_hook which is initialized to this routine in
425 init_decl_processing. */
428 gnat_finish_incomplete_decl (tree dont_care ATTRIBUTE_UNUSED)
433 /* Compute the alignment of the largest mode that can be used for copying
437 gnat_compute_largest_alignment (void)
439 enum machine_mode mode;
441 for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
442 mode = GET_MODE_WIDER_MODE (mode))
443 if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
444 largest_move_alignment = MIN (BIGGEST_ALIGNMENT,
445 MAX (largest_move_alignment,
446 GET_MODE_ALIGNMENT (mode)));
449 /* If we are using the GCC mechanism to process exception handling, we
450 have to register the personality routine for Ada and to initialize
451 various language dependent hooks. */
454 gnat_init_gcc_eh (void)
456 /* We shouldn't do anything if the No_Exceptions_Handler pragma is set,
457 though. This could for instance lead to the emission of tables with
458 references to symbols (such as the Ada eh personality routine) within
459 libraries we won't link against. */
460 if (No_Exception_Handlers_Set ())
463 /* Tell GCC we are handling cleanup actions through exception propagation.
464 This opens possibilities that we don't take advantage of yet, but is
465 nonetheless necessary to ensure that fixup code gets assigned to the
466 right exception regions. */
467 using_eh_for_cleanups ();
469 eh_personality_libfunc = init_one_libfunc ("__gnat_eh_personality");
470 lang_eh_type_covers = gnat_eh_type_covers;
471 lang_eh_runtime_type = gnat_eh_runtime_type;
473 /* Turn on -fexceptions and -fnon-call-exceptions. The first one triggers
474 the generation of the necessary exception runtime tables. The second one
475 is useful for two reasons: 1/ we map some asynchronous signals like SEGV
476 to exceptions, so we need to ensure that the insns which can lead to such
477 signals are correctly attached to the exception region they pertain to,
478 2/ Some calls to pure subprograms are handled as libcall blocks and then
479 marked as "cannot trap" if the flag is not set (see emit_libcall_block).
480 We should not let this be since it is possible for such calls to actually
484 flag_non_call_exceptions = 1;
487 #ifdef DWARF2_UNWIND_INFO
488 if (dwarf2out_do_frame ())
489 dwarf2out_frame_init ();
493 /* Language hooks, first one to print language-specific items in a DECL. */
496 gnat_print_decl (FILE *file, tree node, int indent)
498 switch (TREE_CODE (node))
501 print_node (file, "const_corresponding_var",
502 DECL_CONST_CORRESPONDING_VAR (node), indent + 4);
506 print_node (file, "original field", DECL_ORIGINAL_FIELD (node),
516 gnat_print_type (FILE *file, tree node, int indent)
518 switch (TREE_CODE (node))
521 print_node (file, "ci_co_list", TYPE_CI_CO_LIST (node), indent + 4);
525 print_node (file, "RM size", TYPE_RM_SIZE_ENUM (node), indent + 4);
529 if (TYPE_MODULAR_P (node))
530 print_node (file, "modulus", TYPE_MODULUS (node), indent + 4);
531 else if (TYPE_HAS_ACTUAL_BOUNDS_P (node))
532 print_node (file, "actual bounds", TYPE_ACTUAL_BOUNDS (node),
534 else if (TYPE_VAX_FLOATING_POINT_P (node))
537 print_node (file, "index type", TYPE_INDEX_TYPE (node), indent + 4);
539 print_node (file, "RM size", TYPE_RM_SIZE_INT (node), indent + 4);
543 print_node (file,"actual bounds", TYPE_ACTUAL_BOUNDS (node), indent + 4);
547 if (TYPE_IS_FAT_POINTER_P (node) || TYPE_CONTAINS_TEMPLATE_P (node))
548 print_node (file, "unconstrained array",
549 TYPE_UNCONSTRAINED_ARRAY (node), indent + 4);
551 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
555 case QUAL_UNION_TYPE:
556 print_node (file, "Ada size", TYPE_ADA_SIZE (node), indent + 4);
564 /* We consider two types compatible if they have the same main variant,
565 but we also consider two array types compatible if they have the same
566 component type and bounds.
568 ??? We may also want to generalize to considering lots of integer types
569 compatible, but we need to understand the effects of alias sets first. */
572 gnat_types_compatible_p (tree x, tree y)
574 if (TREE_CODE (x) == ARRAY_TYPE && TREE_CODE (y) == ARRAY_TYPE
575 && gnat_types_compatible_p (TREE_TYPE (x), TREE_TYPE (y))
576 && operand_equal_p (TYPE_MIN_VALUE (TYPE_DOMAIN (x)),
577 TYPE_MIN_VALUE (TYPE_DOMAIN (y)), 0)
578 && operand_equal_p (TYPE_MAX_VALUE (TYPE_DOMAIN (x)),
579 TYPE_MAX_VALUE (TYPE_DOMAIN (y)), 0))
582 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
586 gnat_printable_name (tree decl, int verbosity)
588 const char *coded_name = IDENTIFIER_POINTER (DECL_NAME (decl));
589 char *ada_name = (char *) ggc_alloc (strlen (coded_name) * 2 + 60);
591 __gnat_decode (coded_name, ada_name, 0);
595 Set_Identifier_Casing (ada_name, (char *) DECL_SOURCE_FILE (decl));
596 ada_name = Name_Buffer;
599 return (const char *) ada_name;
602 /* Expands GNAT-specific GCC tree nodes. The only ones we support
603 here are and NULL_EXPR. */
606 gnat_expand_expr (tree exp, rtx target, enum machine_mode tmode,
607 int modifier, rtx *alt_rtl)
609 tree type = TREE_TYPE (exp);
612 /* If this is a statement, call the expansion routine for statements. */
615 gnat_expand_stmt (exp);
619 /* Update EXP to be the new expression to expand. */
620 switch (TREE_CODE (exp))
625 allocate_dynamic_stack_space
626 (expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, TYPE_MODE (sizetype),
628 NULL_RTX, tree_low_cst (TREE_OPERAND (exp, 1), 1));
631 case UNCONSTRAINED_ARRAY_REF:
632 /* If we are evaluating just for side-effects, just evaluate our
633 operand. Otherwise, abort since this code should never appear
634 in a tree to be evaluated (objects aren't unconstrained). */
635 if (target == const0_rtx || TREE_CODE (type) == VOID_TYPE)
636 return expand_expr (TREE_OPERAND (exp, 0), const0_rtx,
639 /* ... fall through ... */
645 return expand_expr_real (new, target, tmode, modifier, alt_rtl);
648 /* Adjusts the RLI used to layout a record after all the fields have been
649 added. We only handle the packed case and cause it to use the alignment
650 that will pad the record at the end. */
653 gnat_adjust_rli (record_layout_info rli ATTRIBUTE_UNUSED)
656 /* ??? This code seems to have no actual effect; record_align should already
657 reflect the largest alignment desired by a field. jason 2003-04-01 */
658 unsigned int record_align = rli->unpadded_align;
661 /* If an alignment has been specified, don't use anything larger unless we
663 if (TYPE_ALIGN (rli->t) != 0 && TYPE_ALIGN (rli->t) < record_align)
664 record_align = MAX (rli->record_align, TYPE_ALIGN (rli->t));
666 /* If any fields have variable size, we need to force the record to be at
667 least as aligned as the alignment of that type. */
668 for (field = TYPE_FIELDS (rli->t); field; field = TREE_CHAIN (field))
669 if (TREE_CODE (DECL_SIZE_UNIT (field)) != INTEGER_CST)
670 record_align = MAX (record_align, DECL_ALIGN (field));
672 if (TYPE_PACKED (rli->t))
673 rli->record_align = record_align;
677 /* These routines are used in conjunction with GCC exception handling. */
679 /* Map compile-time to run-time tree for GCC exception handling scheme. */
682 gnat_eh_runtime_type (tree type)
687 /* Return true if type A catches type B. Callback for flow analysis from
688 the exception handling part of the back-end. */
691 gnat_eh_type_covers (tree a, tree b)
693 /* a catches b if they represent the same exception id or if a
696 ??? integer_zero_node for "others" is hardwired in too many places
698 return (a == b || a == integer_zero_node);
701 /* Get the alias set corresponding to a type or expression. */
704 gnat_get_alias_set (tree type)
706 /* If this is a padding type, use the type of the first field. */
707 if (TREE_CODE (type) == RECORD_TYPE
708 && TYPE_IS_PADDING_P (type))
709 return get_alias_set (TREE_TYPE (TYPE_FIELDS (type)));
711 /* If the type is an unconstrained array, use the type of the
712 self-referential array we make. */
713 else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE)
715 get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (type)))));
721 /* GNU_TYPE is a type. Return its maxium size in bytes, if known. */
724 gnat_type_max_size (gnu_type)
727 return max_size (TYPE_SIZE_UNIT (gnu_type), 1);
730 /* GNU_TYPE is a type. Determine if it should be passed by reference by
734 default_pass_by_ref (tree gnu_type)
736 /* We pass aggregates by reference if they are sufficiently large. The
737 choice of constant here is somewhat arbitrary. We also pass by
738 reference if the target machine would either pass or return by
739 reference. Strictly speaking, we need only check the return if this
740 is an In Out parameter, but it's probably best to err on the side of
741 passing more things by reference. */
743 if (pass_by_reference (NULL, TYPE_MODE (gnu_type), gnu_type, 1))
746 if (targetm.calls.return_in_memory (gnu_type, NULL_TREE))
749 if (AGGREGATE_TYPE_P (gnu_type)
750 && (! host_integerp (TYPE_SIZE (gnu_type), 1)
751 || 0 < compare_tree_int (TYPE_SIZE (gnu_type),
752 8 * TYPE_ALIGN (gnu_type))))
758 /* GNU_TYPE is the type of a subprogram parameter. Determine from the type if
759 it should be passed by reference. */
762 must_pass_by_ref (tree gnu_type)
764 /* We pass only unconstrained objects, those required by the language
765 to be passed by reference, and objects of variable size. The latter
766 is more efficient, avoids problems with variable size temporaries,
767 and does not produce compatibility problems with C, since C does
768 not have such objects. */
769 return (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE
770 || (AGGREGATE_TYPE_P (gnu_type) && TYPE_BY_REFERENCE_P (gnu_type))
771 || (TYPE_SIZE (gnu_type) != 0
772 && TREE_CODE (TYPE_SIZE (gnu_type)) != INTEGER_CST));
775 /* This function is called by the front end to enumerate all the supported
776 modes for the machine. We pass a function which is called back with
777 the following integer parameters:
779 FLOAT_P nonzero if this represents a floating-point mode
780 COMPLEX_P nonzero is this represents a complex mode
781 COUNT count of number of items, nonzero for vector mode
782 PRECISION number of bits in data representation
783 MANTISSA number of bits in mantissa, if FP and known, else zero.
784 SIZE number of bits used to store data
785 ALIGN number of bits to which mode is aligned. */
788 enumerate_modes (void (*f) (int, int, int, int, int, int, unsigned int))
792 for (i = 0; i < NUM_MACHINE_MODES; i++)
800 enum machine_mode inner_mode = i;
802 switch (GET_MODE_CLASS (i))
809 case MODE_COMPLEX_INT:
811 inner_mode = GET_MODE_INNER (i);
813 case MODE_COMPLEX_FLOAT:
816 inner_mode = GET_MODE_INNER (i);
818 case MODE_VECTOR_INT:
820 inner_mode = GET_MODE_INNER (i);
822 case MODE_VECTOR_FLOAT:
825 inner_mode = GET_MODE_INNER (i);
831 /* Skip this mode if it's one the front end doesn't need to know about
832 (e.g., the CC modes) or if there is no add insn for that mode (or
833 any wider mode), meaning it is not supported by the hardware. If
834 this a complex or vector mode, we care about the inner mode. */
835 for (j = inner_mode; j != VOIDmode; j = GET_MODE_WIDER_MODE (j))
836 if (add_optab->handlers[j].insn_code != CODE_FOR_nothing)
841 const struct real_format *fmt = REAL_MODE_FORMAT (inner_mode);
843 mantissa = fmt->p * fmt->log2_b;
846 if (!skip_p && j != VOIDmode)
847 (*f) (float_p, complex_p, vector_p ? GET_MODE_NUNITS (i) : 0,
848 GET_MODE_BITSIZE (i), mantissa,
849 GET_MODE_SIZE (i) * BITS_PER_UNIT, GET_MODE_ALIGNMENT (i));
854 fp_prec_to_size (int prec)
856 enum machine_mode mode;
858 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
859 mode = GET_MODE_WIDER_MODE (mode))
860 if (GET_MODE_PRECISION (mode) == prec)
861 return GET_MODE_BITSIZE (mode);
867 fp_size_to_prec (int size)
869 enum machine_mode mode;
871 for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT); mode != VOIDmode;
872 mode = GET_MODE_WIDER_MODE (mode))
873 if (GET_MODE_BITSIZE (mode) == size)
874 return GET_MODE_PRECISION (mode);