1/* Definitions of target machine for GCC for IA-32.
2   Copyright (C) 1988, 1992, 1994, 1995, 1996, 1996, 1997, 1998, 1999,
3   2000, 2001, 2002, 2003, 2004, 2005, 2006
4   Free Software Foundation, Inc.
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GCC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING.  If not, write to
20the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21Boston, MA 02110-1301, USA.  */
22
23/* Functions in i386.c */
24extern void override_options (void);
25extern void optimization_options (int, int);
26
27extern int ix86_can_use_return_insn_p (void);
28extern int ix86_frame_pointer_required (void);
29extern void ix86_setup_frame_addresses (void);
30
31extern void ix86_file_end (void);
32extern HOST_WIDE_INT ix86_initial_elimination_offset (int, int);
33extern void ix86_expand_prologue (void);
34extern void ix86_expand_epilogue (int);
35
36extern void ix86_output_addr_vec_elt (FILE *, int);
37extern void ix86_output_addr_diff_elt (FILE *, int, int);
38
39#ifdef RTX_CODE
40extern int ix86_aligned_p (rtx);
41
42extern int standard_80387_constant_p (rtx);
43extern const char *standard_80387_constant_opcode (rtx);
44extern rtx standard_80387_constant_rtx (int);
45extern int standard_sse_constant_p (rtx);
46extern const char *standard_sse_constant_opcode (rtx, rtx);
47extern int symbolic_reference_mentioned_p (rtx);
48extern bool extended_reg_mentioned_p (rtx);
49extern bool x86_extended_QIreg_mentioned_p (rtx);
50extern bool x86_extended_reg_mentioned_p (rtx);
51extern enum machine_mode ix86_cc_mode (enum rtx_code, rtx, rtx);
52
53extern int ix86_expand_movmem (rtx, rtx, rtx, rtx);
54extern int ix86_expand_clrmem (rtx, rtx, rtx);
55extern int ix86_expand_strlen (rtx, rtx, rtx, rtx);
56
57extern bool legitimate_constant_p (rtx);
58extern bool constant_address_p (rtx);
59extern bool legitimate_pic_operand_p (rtx);
60extern int legitimate_pic_address_disp_p (rtx);
61extern int legitimate_address_p (enum machine_mode, rtx, int);
62extern rtx legitimize_address (rtx, rtx, enum machine_mode);
63
64extern void print_reg (rtx, int, FILE*);
65extern void print_operand (FILE*, rtx, int);
66extern void print_operand_address (FILE*, rtx);
67extern bool output_addr_const_extra (FILE*, rtx);
68
69extern void split_di (rtx[], int, rtx[], rtx[]);
70extern void split_ti (rtx[], int, rtx[], rtx[]);
71
72extern const char *output_set_got (rtx, rtx);
73extern const char *output_387_binary_op (rtx, rtx*);
74extern const char *output_387_reg_move (rtx, rtx*);
75extern const char *output_fix_trunc (rtx, rtx*, int);
76extern const char *output_fp_compare (rtx, rtx*, int, int);
77
78extern void ix86_expand_clear (rtx);
79extern void ix86_expand_move (enum machine_mode, rtx[]);
80extern void ix86_expand_vector_move (enum machine_mode, rtx[]);
81extern void ix86_expand_vector_move_misalign (enum machine_mode, rtx[]);
82extern void ix86_expand_push (enum machine_mode, rtx);
83extern rtx ix86_fixup_binary_operands (enum rtx_code,
84				       enum machine_mode, rtx[]);
85extern void ix86_fixup_binary_operands_no_copy (enum rtx_code,
86						enum machine_mode, rtx[]);
87extern void ix86_expand_binary_operator (enum rtx_code,
88					 enum machine_mode, rtx[]);
89extern int ix86_binary_operator_ok (enum rtx_code, enum machine_mode, rtx[]);
90extern void ix86_expand_unary_operator (enum rtx_code, enum machine_mode,
91					rtx[]);
92extern rtx ix86_build_signbit_mask (enum machine_mode, bool, bool);
93extern void ix86_expand_fp_absneg_operator (enum rtx_code, enum machine_mode,
94					    rtx[]);
95extern void ix86_expand_copysign (rtx []);
96extern void ix86_split_copysign_const (rtx []);
97extern void ix86_split_copysign_var (rtx []);
98extern int ix86_unary_operator_ok (enum rtx_code, enum machine_mode, rtx[]);
99extern int ix86_match_ccmode (rtx, enum machine_mode);
100extern rtx ix86_expand_compare (enum rtx_code, rtx *, rtx *);
101extern int ix86_use_fcomi_compare (enum rtx_code);
102extern void ix86_expand_branch (enum rtx_code, rtx);
103extern int ix86_expand_setcc (enum rtx_code, rtx);
104extern int ix86_expand_int_movcc (rtx[]);
105extern int ix86_expand_fp_movcc (rtx[]);
106extern bool ix86_expand_fp_vcond (rtx[]);
107extern bool ix86_expand_int_vcond (rtx[]);
108extern int ix86_expand_int_addcc (rtx[]);
109extern void ix86_expand_call (rtx, rtx, rtx, rtx, rtx, int);
110extern void x86_initialize_trampoline (rtx, rtx, rtx);
111extern rtx ix86_zero_extend_to_Pmode (rtx);
112extern void ix86_split_long_move (rtx[]);
113extern void ix86_split_ashl (rtx *, rtx, enum machine_mode);
114extern void ix86_split_ashr (rtx *, rtx, enum machine_mode);
115extern void ix86_split_lshr (rtx *, rtx, enum machine_mode);
116extern rtx ix86_find_base_term (rtx);
117extern int ix86_check_movabs (rtx, int);
118
119extern rtx assign_386_stack_local (enum machine_mode, enum ix86_stack_slot);
120extern int ix86_attr_length_immediate_default (rtx, int);
121extern int ix86_attr_length_address_default (rtx);
122
123extern enum machine_mode ix86_fp_compare_mode (enum rtx_code);
124
125extern rtx ix86_libcall_value (enum machine_mode);
126extern bool ix86_function_value_regno_p (int);
127extern bool ix86_function_arg_regno_p (int);
128extern int ix86_function_arg_boundary (enum machine_mode, tree);
129extern int ix86_return_in_memory (tree);
130extern void ix86_va_start (tree, rtx);
131extern rtx ix86_va_arg (tree, tree);
132
133extern rtx ix86_force_to_memory (enum machine_mode, rtx);
134extern void ix86_free_from_memory (enum machine_mode);
135extern void ix86_split_fp_branch (enum rtx_code code, rtx, rtx,
136				  rtx, rtx, rtx, rtx);
137extern bool ix86_hard_regno_mode_ok (int, enum machine_mode);
138extern bool ix86_modes_tieable_p (enum machine_mode, enum machine_mode);
139extern int ix86_register_move_cost (enum machine_mode, enum reg_class,
140				    enum reg_class);
141extern int ix86_secondary_memory_needed (enum reg_class, enum reg_class,
142					 enum machine_mode, int);
143extern bool ix86_cannot_change_mode_class (enum machine_mode,
144					   enum machine_mode, enum reg_class);
145extern enum reg_class ix86_preferred_reload_class (rtx, enum reg_class);
146extern enum reg_class ix86_preferred_output_reload_class (rtx, enum reg_class);
147extern int ix86_memory_move_cost (enum machine_mode, enum reg_class, int);
148extern int ix86_mode_needed (int, rtx);
149extern void emit_i387_cw_initialization (int);
150extern bool ix86_fp_jump_nontrivial_p (enum rtx_code);
151extern void x86_order_regs_for_local_alloc (void);
152extern void x86_function_profiler (FILE *, int);
153extern void x86_emit_floatuns (rtx [2]);
154extern void ix86_emit_fp_unordered_jump (rtx);
155
156extern void ix86_emit_i387_log1p (rtx, rtx);
157
158extern enum rtx_code ix86_reverse_condition (enum rtx_code, enum machine_mode);
159
160#ifdef TREE_CODE
161extern void init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx, tree);
162extern rtx function_arg (CUMULATIVE_ARGS *, enum machine_mode, tree, int);
163extern void function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
164				  tree, int);
165extern rtx ix86_function_value (tree, tree, bool);
166#endif
167
168#endif
169
170#ifdef TREE_CODE
171extern int ix86_return_pops_args (tree, tree, int);
172
173extern int ix86_data_alignment (tree, int);
174extern int ix86_local_alignment (tree, int);
175extern int ix86_constant_alignment (tree, int);
176extern tree ix86_handle_shared_attribute (tree *, tree, tree, int, bool *);
177extern tree ix86_handle_selectany_attribute (tree *, tree, tree, int, bool *);
178
179extern unsigned int i386_pe_section_type_flags (tree, const char *, int);
180extern void i386_pe_asm_named_section (const char *, unsigned int, tree);
181extern int x86_field_alignment (tree, int);
182#endif
183
184extern rtx ix86_tls_get_addr (void);
185extern rtx ix86_tls_module_base (void);
186
187extern void ix86_expand_vector_init (bool, rtx, rtx);
188extern void ix86_expand_vector_set (bool, rtx, rtx, int);
189extern void ix86_expand_vector_extract (bool, rtx, rtx, int);
190extern void ix86_expand_reduc_v4sf (rtx (*)(rtx, rtx, rtx), rtx, rtx);
191
192/* In winnt.c  */
193extern int i386_pe_dllexport_name_p (const char *);
194extern int i386_pe_dllimport_name_p (const char *);
195extern void i386_pe_unique_section (tree, int);
196extern void i386_pe_declare_function_type (FILE *, const char *, int);
197extern void i386_pe_record_external_function (tree, const char *);
198extern void i386_pe_record_exported_symbol (const char *, int);
199extern void i386_pe_asm_file_end (FILE *);
200extern void i386_pe_encode_section_info (tree, rtx, int);
201extern const char *i386_pe_strip_name_encoding (const char *);
202extern const char *i386_pe_strip_name_encoding_full (const char *);
203extern void i386_pe_output_labelref (FILE *, const char *);
204extern bool i386_pe_valid_dllimport_attribute_p (tree);
205
206/* In winnt-cxx.c and winnt-stubs.c  */
207extern void i386_pe_adjust_class_at_definition (tree);
208extern bool i386_pe_type_dllimport_p (tree);
209extern bool i386_pe_type_dllexport_p (tree);
210
211extern rtx maybe_get_pool_constant (rtx);
212
213extern char internal_label_prefix[16];
214extern int internal_label_prefix_len;
215
216enum ix86_address_seg { SEG_DEFAULT, SEG_FS, SEG_GS };
217struct ix86_address
218{
219  rtx base, index, disp;
220  HOST_WIDE_INT scale;
221  enum ix86_address_seg seg;
222};
223
224extern int ix86_decompose_address (rtx, struct ix86_address *);
225extern int memory_address_length (rtx addr);
226extern void x86_output_aligned_bss (FILE *, tree, const char *,
227				    unsigned HOST_WIDE_INT, int);
228extern void x86_elf_aligned_common (FILE *, const char *,
229				    unsigned HOST_WIDE_INT, int);
230
231#ifdef RTX_CODE
232extern void ix86_fp_comparison_codes (enum rtx_code code, enum rtx_code *,
233				      enum rtx_code *, enum rtx_code *);
234extern enum rtx_code ix86_fp_compare_code_to_integer (enum rtx_code);
235#endif
236extern int asm_preferred_eh_data_format (int, int);
237