1 /* Internal to rs6000 type, variable, and function declarations and
2 definitons shared between the various rs6000 source files.
3 Copyright (C) 1991-2021 Free Software Foundation, Inc.
4 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef GCC_RS6000_INTERNAL_H
23 #define GCC_RS6000_INTERNAL_H
24
25 /* Structure used to define the rs6000 stack */
26 typedef struct rs6000_stack {
27 int reload_completed; /* stack info won't change from here on */
28 int first_gp_reg_save; /* first callee saved GP register used */
29 int first_fp_reg_save; /* first callee saved FP register used */
30 int first_altivec_reg_save; /* first callee saved AltiVec register used */
31 int lr_save_p; /* true if the link reg needs to be saved */
32 int cr_save_p; /* true if the CR reg needs to be saved */
33 unsigned int vrsave_mask; /* mask of vec registers to save */
34 int push_p; /* true if we need to allocate stack space */
35 int calls_p; /* true if there are non-sibling calls */
36 int world_save_p; /* true if we're saving *everything*:
37 r13-r31, cr, f14-f31, vrsave, v20-v31 */
38 enum rs6000_abi abi; /* which ABI to use */
39 int gp_save_offset; /* offset to save GP regs from initial SP */
40 int fp_save_offset; /* offset to save FP regs from initial SP */
41 int altivec_save_offset; /* offset to save AltiVec regs from initial SP */
42 int rop_hash_save_offset; /* offset to save ROP hash from initial SP */
43 int lr_save_offset; /* offset to save LR from initial SP */
44 int cr_save_offset; /* offset to save CR from initial SP */
45 int vrsave_save_offset; /* offset to save VRSAVE from initial SP */
46 int varargs_save_offset; /* offset to save the varargs registers */
47 int ehrd_offset; /* offset to EH return data */
48 int ehcr_offset; /* offset to EH CR field data */
49 int reg_size; /* register size (4 or 8) */
50 HOST_WIDE_INT vars_size; /* variable save area size */
51 int parm_size; /* outgoing parameter size */
52 int save_size; /* save area size */
53 int fixed_size; /* fixed size of stack frame */
54 int gp_size; /* size of saved GP registers */
55 int fp_size; /* size of saved FP registers */
56 int altivec_size; /* size of saved AltiVec registers */
57 int rop_hash_size; /* size of ROP hash slot */
58 int cr_size; /* size to hold CR if not in fixed area */
59 int vrsave_size; /* size to hold VRSAVE */
60 int altivec_padding_size; /* size of altivec alignment padding */
61 HOST_WIDE_INT total_size; /* total bytes allocated for stack */
62 int savres_strategy;
63 } rs6000_stack_t;
64
65
66 extern int need_toc_init;
67 extern char toc_label_name[10];
68 extern int rs6000_pic_labelno;
69
70 #ifdef USING_ELFOS_H
71 extern const char *rs6000_machine;
72 #endif
73
74
75 /* The VRSAVE bitmask puts bit %v0 as the most significant bit. */
76 #define ALTIVEC_REG_BIT(REGNO) (0x80000000 >> ((REGNO) - FIRST_ALTIVEC_REGNO))
77
78
79 /* Declare functions in rs6000-logue.c or called in rs6000.c
80 from rs6000-logue.c */
81
82 extern int uses_TOC (void);
83 extern bool rs6000_global_entry_point_needed_p (void);
84 extern void rs6000_output_function_prologue (FILE *file);
85 extern void rs6000_output_function_epilogue (FILE *file);
86 extern bool rs6000_function_ok_for_sibcall (tree decl, tree exp);
87 extern sbitmap rs6000_get_separate_components (void);
88 extern sbitmap rs6000_components_for_bb (basic_block bb);
89 extern void rs6000_disqualify_components (sbitmap components, edge e,
90 sbitmap edge_components,
91 bool /*is_prologue*/);
92 extern void rs6000_emit_prologue_components (sbitmap components);
93 extern void rs6000_emit_epilogue_components (sbitmap components);
94 extern void rs6000_set_handled_components (sbitmap components);
95 extern rs6000_stack_t * rs6000_stack_info (void);
96 extern rtx rs6000_got_sym (void);
97 extern struct machine_function *rs6000_init_machine_status (void);
98 extern bool save_reg_p (int reg);
99 extern const char * rs6000_machine_from_flags (void);
100 extern void emit_asm_machine (void);
101 extern bool rs6000_global_entry_point_prologue_needed_p (void);
102 extern bool rs6000_keep_leaf_when_profiled (void);
103 extern void rs6000_live_on_entry (bitmap regs);
104
105 /* Return true if the OFFSET is valid for the quad address instructions that
106 use d-form (register + offset) addressing. */
107
108 static inline bool
quad_address_offset_p(HOST_WIDE_INT offset)109 quad_address_offset_p (HOST_WIDE_INT offset)
110 {
111 return (IN_RANGE (offset, -32768, 32767) && ((offset) & 0xf) == 0);
112 }
113
114 /* Mach-O (Darwin) support for longcalls, emitted from rs6000-logue.c. */
115
116 #if TARGET_MACHO
117
118 typedef struct branch_island_d {
119 tree function_name;
120 tree label_name;
121 int line_number;
122 } branch_island;
123
124 extern vec<branch_island, va_gc> *branch_islands;
125
126 #endif
127
128 /* Declare functions in rs6000-call.c or called in rs6000.c
129 from rs6000-call.c */
130 extern int rs6000_darwin64_struct_check_p (machine_mode mode, const_tree type);
131 extern bool rs6000_discover_homogeneous_aggregate (machine_mode mode,
132 const_tree type,
133 machine_mode *elt_mode,
134 int *n_elts);
135 extern void rs6000_output_mi_thunk (FILE *file,
136 tree thunk_fndecl ATTRIBUTE_UNUSED,
137 HOST_WIDE_INT delta,
138 HOST_WIDE_INT vcall_offset,
139 tree function);
140 extern bool rs6000_output_addr_const_extra (FILE *file, rtx x);
141 extern bool rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi);
142 extern tree rs6000_build_builtin_va_list (void);
143 extern void rs6000_va_start (tree valist, rtx nextarg);
144 extern tree rs6000_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
145 gimple_seq *post_p);
146 extern machine_mode rs6000_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
147 machine_mode mode,
148 int *punsignedp ATTRIBUTE_UNUSED,
149 const_tree, int);
150 extern bool rs6000_return_in_memory (const_tree type,
151 const_tree fntype ATTRIBUTE_UNUSED);
152 extern bool rs6000_return_in_msb (const_tree valtype);
153 extern bool rs6000_pass_by_reference (cumulative_args_t,
154 const function_arg_info &);
155 extern void setup_incoming_varargs (cumulative_args_t,
156 const function_arg_info &, int *, int);
157 extern unsigned int rs6000_function_arg_boundary (machine_mode mode,
158 const_tree type);
159 extern bool rs6000_must_pass_in_stack (const function_arg_info &);
160 extern int rs6000_arg_partial_bytes (cumulative_args_t,
161 const function_arg_info &);
162 extern void rs6000_function_arg_advance (cumulative_args_t,
163 const function_arg_info &);
164 extern pad_direction rs6000_function_arg_padding (machine_mode mode,
165 const_tree type);
166 extern rtx rs6000_function_arg (cumulative_args_t, const function_arg_info &);
167 extern rtx rs6000_darwin64_record_arg (CUMULATIVE_ARGS *, const_tree,
168 bool, bool);
169 extern rtx rs6000_internal_arg_pointer (void);
170
171 extern void rs6000_init_builtins (void);
172 extern tree rs6000_builtin_decl (unsigned code,
173 bool initialize_p ATTRIBUTE_UNUSED);
174 extern rtx rs6000_expand_builtin (tree exp, rtx target,
175 rtx subtarget ATTRIBUTE_UNUSED,
176 machine_mode mode ATTRIBUTE_UNUSED,
177 int ignore ATTRIBUTE_UNUSED);
178 extern tree rs6000_fold_builtin (tree fndecl ATTRIBUTE_UNUSED,
179 int n_args ATTRIBUTE_UNUSED,
180 tree *args ATTRIBUTE_UNUSED,
181 bool ignore ATTRIBUTE_UNUSED);
182
183 #if TARGET_ELF
184 extern bool rs6000_passes_ieee128;
185 #endif
186 extern bool rs6000_passes_float;
187 extern bool rs6000_passes_long_double;
188 extern bool rs6000_passes_vector;
189 extern bool rs6000_returns_struct;
190 extern bool cpu_builtin_p;
191
192 #endif
193