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2c04f847
BS		 1/* Internal to rs6000 type, variable, and function declarations and
2 definitons shared between the various rs6000 source files.
99dee823 3 Copyright (C) 1991-2021 Free Software Foundation, Inc.
2c04f847
BS		 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 */
26typedef 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 */
199baa71 35 int calls_p; /* true if there are non-sibling calls */
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BS		 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 lr_save_offset; /* offset to save LR from initial SP */
43 int cr_save_offset; /* offset to save CR from initial SP */
44 int vrsave_save_offset; /* offset to save VRSAVE from initial SP */
45 int varargs_save_offset; /* offset to save the varargs registers */
46 int ehrd_offset; /* offset to EH return data */
47 int ehcr_offset; /* offset to EH CR field data */
48 int reg_size; /* register size (4 or 8) */
49 HOST_WIDE_INT vars_size; /* variable save area size */
50 int parm_size; /* outgoing parameter size */
51 int save_size; /* save area size */
52 int fixed_size; /* fixed size of stack frame */
53 int gp_size; /* size of saved GP registers */
54 int fp_size; /* size of saved FP registers */
55 int altivec_size; /* size of saved AltiVec registers */
56 int cr_size; /* size to hold CR if not in fixed area */
57 int vrsave_size; /* size to hold VRSAVE */
58 int altivec_padding_size; /* size of altivec alignment padding */
59 HOST_WIDE_INT total_size; /* total bytes allocated for stack */
60 int savres_strategy;
61} rs6000_stack_t;
62
63
64extern int need_toc_init;
65extern char toc_label_name[10];
66extern int rs6000_pic_labelno;
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BS		 67
68#ifdef USING_ELFOS_H
69extern const char *rs6000_machine;
70#endif
71
72
73/* The VRSAVE bitmask puts bit %v0 as the most significant bit. */
74#define ALTIVEC_REG_BIT(REGNO) (0x80000000 >> ((REGNO) - FIRST_ALTIVEC_REGNO))
75
76
77/* Declare functions in rs6000-logue.c or called in rs6000.c
78 from rs6000-logue.c */
79
80extern int uses_TOC (void);
81extern bool rs6000_global_entry_point_needed_p (void);
82extern void rs6000_output_function_prologue (FILE *file);
83extern void rs6000_output_function_epilogue (FILE *file);
84extern bool rs6000_function_ok_for_sibcall (tree decl, tree exp);
85extern sbitmap rs6000_get_separate_components (void);
86extern sbitmap rs6000_components_for_bb (basic_block bb);
87extern void rs6000_disqualify_components (sbitmap components, edge e,
88 sbitmap edge_components,
89 bool /*is_prologue*/);
90extern void rs6000_emit_prologue_components (sbitmap components);
91extern void rs6000_emit_epilogue_components (sbitmap components);
92extern void rs6000_set_handled_components (sbitmap components);
93extern rs6000_stack_t * rs6000_stack_info (void);
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BS		 94extern rtx rs6000_got_sym (void);
95extern struct machine_function *rs6000_init_machine_status (void);
96extern bool save_reg_p (int reg);
97extern const char * rs6000_machine_from_flags (void);
98extern void emit_asm_machine (void);
99extern bool rs6000_global_entry_point_prologue_needed_p (void);
93a090cf 100extern bool rs6000_keep_leaf_when_profiled (void);
1acf0246 101extern void rs6000_live_on_entry (bitmap regs);
2c04f847
BS		 102
103/* Return true if the OFFSET is valid for the quad address instructions that
104 use d-form (register + offset) addressing. */
105
106static inline bool
107quad_address_offset_p (HOST_WIDE_INT offset)
108{
109 return (IN_RANGE (offset, -32768, 32767) && ((offset) & 0xf) == 0);
110}
111
9ff33839
IS		 112/* Mach-O (Darwin) support for longcalls, emitted from rs6000-logue.c. */
113
114#if TARGET_MACHO
115
116typedef struct branch_island_d {
117 tree function_name;
118 tree label_name;
119 int line_number;
120 } branch_island;
121
122extern vec<branch_island, va_gc> *branch_islands;
123
124#endif
2c04f847 125
1acf0246
BS		 126/* Declare functions in rs6000-call.c or called in rs6000.c
127 from rs6000-call.c */
128extern int rs6000_darwin64_struct_check_p (machine_mode mode, const_tree type);
129extern bool rs6000_discover_homogeneous_aggregate (machine_mode mode,
130 const_tree type,
131 machine_mode *elt_mode,
132 int *n_elts);
133extern void rs6000_output_mi_thunk (FILE *file,
134 tree thunk_fndecl ATTRIBUTE_UNUSED,
135 HOST_WIDE_INT delta,
136 HOST_WIDE_INT vcall_offset,
137 tree function);
138extern bool rs6000_output_addr_const_extra (FILE *file, rtx x);
139extern bool rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi);
1acf0246
BS		 140extern tree rs6000_build_builtin_va_list (void);
141extern void rs6000_va_start (tree valist, rtx nextarg);
142extern tree rs6000_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
143 gimple_seq *post_p);
144extern machine_mode rs6000_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
145 machine_mode mode,
146 int *punsignedp ATTRIBUTE_UNUSED,
147 const_tree, int);
148extern bool rs6000_return_in_memory (const_tree type,
149 const_tree fntype ATTRIBUTE_UNUSED);
150extern bool rs6000_return_in_msb (const_tree valtype);
52090e4d
RS		 151extern bool rs6000_pass_by_reference (cumulative_args_t,
152 const function_arg_info &);
e7056ca4
RS		 153extern void setup_incoming_varargs (cumulative_args_t,
154 const function_arg_info &, int *, int);
1acf0246
BS		 155extern unsigned int rs6000_function_arg_boundary (machine_mode mode,
156 const_tree type);
0ffef200 157extern bool rs6000_must_pass_in_stack (const function_arg_info &);
a7c81bc1
RS		 158extern int rs6000_arg_partial_bytes (cumulative_args_t,
159 const function_arg_info &);
6930c98c
RS		 160extern void rs6000_function_arg_advance (cumulative_args_t,
161 const function_arg_info &);
1acf0246
BS		 162extern pad_direction rs6000_function_arg_padding (machine_mode mode,
163 const_tree type);
6783fdb7 164extern rtx rs6000_function_arg (cumulative_args_t, const function_arg_info &);
1acf0246
BS		 165extern rtx rs6000_darwin64_record_arg (CUMULATIVE_ARGS *, const_tree,
166 bool, bool);
167extern rtx rs6000_internal_arg_pointer (void);
168
169extern void rs6000_init_builtins (void);
170extern tree rs6000_builtin_decl (unsigned code,
171 bool initialize_p ATTRIBUTE_UNUSED);
172extern rtx rs6000_expand_builtin (tree exp, rtx target,
173 rtx subtarget ATTRIBUTE_UNUSED,
174 machine_mode mode ATTRIBUTE_UNUSED,
175 int ignore ATTRIBUTE_UNUSED);
176extern tree rs6000_fold_builtin (tree fndecl ATTRIBUTE_UNUSED,
177 int n_args ATTRIBUTE_UNUSED,
178 tree *args ATTRIBUTE_UNUSED,
179 bool ignore ATTRIBUTE_UNUSED);
180
181#if TARGET_ELF
182extern bool rs6000_passes_ieee128;
183#endif
184extern bool rs6000_passes_float;
185extern bool rs6000_passes_long_double;
186extern bool rs6000_passes_vector;
187extern bool rs6000_returns_struct;
188extern bool cpu_builtin_p;
1acf0246 189
2c04f847 190#endif
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