xref: /netbsd-src/external/gpl3/gcc.old/dist/gcc/config/rs6000/rs6000-internal.h (revision cb63e24e8d6aae7ddac1859a9015f48b1d8bd90e)
1 /* Internal to rs6000 type, variable, and function declarations and
2    definitons shared between the various rs6000 source files.
3    Copyright (C) 1991-2020 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 the function makes any 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 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 
64 extern int need_toc_init;
65 extern char toc_label_name[10];
66 extern int rs6000_pic_labelno;
67 
68 #ifdef USING_ELFOS_H
69 extern 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 
80 extern int uses_TOC (void);
81 extern bool rs6000_global_entry_point_needed_p (void);
82 extern void rs6000_output_function_prologue (FILE *file);
83 extern void rs6000_output_function_epilogue (FILE *file);
84 extern bool rs6000_function_ok_for_sibcall (tree decl, tree exp);
85 extern sbitmap rs6000_get_separate_components (void);
86 extern sbitmap rs6000_components_for_bb (basic_block bb);
87 extern void rs6000_disqualify_components (sbitmap components, edge e,
88 					  sbitmap edge_components,
89 					  bool /*is_prologue*/);
90 extern void rs6000_emit_prologue_components (sbitmap components);
91 extern void rs6000_emit_epilogue_components (sbitmap components);
92 extern void rs6000_set_handled_components (sbitmap components);
93 extern rs6000_stack_t * rs6000_stack_info (void);
94 extern rtx rs6000_got_sym (void);
95 extern struct machine_function *rs6000_init_machine_status (void);
96 extern bool save_reg_p (int reg);
97 extern const char * rs6000_machine_from_flags (void);
98 extern void emit_asm_machine (void);
99 extern bool rs6000_global_entry_point_prologue_needed_p (void);
100 extern bool rs6000_keep_leaf_when_profiled (void);
101 extern void rs6000_live_on_entry (bitmap regs);
102 
103 /* Return true if the OFFSET is valid for the quad address instructions that
104    use d-form (register + offset) addressing.  */
105 
106 static inline bool
107 quad_address_offset_p (HOST_WIDE_INT offset)
108 {
109   return (IN_RANGE (offset, -32768, 32767) && ((offset) & 0xf) == 0);
110 }
111 
112 /* Mach-O (Darwin) support for longcalls, emitted from  rs6000-logue.c.  */
113 
114 #if TARGET_MACHO
115 
116 typedef struct branch_island_d {
117   tree function_name;
118   tree label_name;
119   int line_number;
120  } branch_island;
121 
122 extern vec<branch_island, va_gc> *branch_islands;
123 
124 #endif
125 
126 /* Declare functions in rs6000-call.c or called in rs6000.c
127    from rs6000-call.c  */
128 extern int rs6000_darwin64_struct_check_p (machine_mode mode, const_tree type);
129 extern bool rs6000_discover_homogeneous_aggregate (machine_mode mode,
130 						   const_tree type,
131 						   machine_mode *elt_mode,
132 						   int *n_elts);
133 extern 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);
138 extern bool rs6000_output_addr_const_extra (FILE *file, rtx x);
139 extern bool rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi);
140 extern tree rs6000_build_builtin_va_list (void);
141 extern void rs6000_va_start (tree valist, rtx nextarg);
142 extern tree rs6000_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
143 				    gimple_seq *post_p);
144 extern machine_mode rs6000_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
145 						  machine_mode mode,
146 						  int *punsignedp ATTRIBUTE_UNUSED,
147 						  const_tree, int);
148 extern bool rs6000_return_in_memory (const_tree type,
149 				     const_tree fntype ATTRIBUTE_UNUSED);
150 extern bool rs6000_return_in_msb (const_tree valtype);
151 extern bool rs6000_pass_by_reference (cumulative_args_t,
152 				      const function_arg_info &);
153 extern void setup_incoming_varargs (cumulative_args_t,
154 				    const function_arg_info &, int *, int);
155 extern unsigned int rs6000_function_arg_boundary (machine_mode mode,
156 						  const_tree type);
157 extern bool rs6000_must_pass_in_stack (const function_arg_info &);
158 extern int rs6000_arg_partial_bytes (cumulative_args_t,
159 				     const function_arg_info &);
160 extern void rs6000_function_arg_advance (cumulative_args_t,
161 					 const function_arg_info &);
162 extern pad_direction rs6000_function_arg_padding (machine_mode mode,
163 						  const_tree type);
164 extern rtx rs6000_function_arg (cumulative_args_t, const function_arg_info &);
165 extern rtx rs6000_darwin64_record_arg (CUMULATIVE_ARGS *, const_tree,
166 				       bool, bool);
167 extern rtx rs6000_internal_arg_pointer (void);
168 
169 extern void rs6000_init_builtins (void);
170 extern tree rs6000_builtin_decl (unsigned code,
171 				 bool initialize_p ATTRIBUTE_UNUSED);
172 extern rtx rs6000_expand_builtin (tree exp, rtx target,
173 				  rtx subtarget ATTRIBUTE_UNUSED,
174 				  machine_mode mode ATTRIBUTE_UNUSED,
175 				  int ignore ATTRIBUTE_UNUSED);
176 extern 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
182 extern bool rs6000_passes_ieee128;
183 #endif
184 extern bool rs6000_passes_float;
185 extern bool rs6000_passes_long_double;
186 extern bool rs6000_passes_vector;
187 extern bool rs6000_returns_struct;
188 extern bool cpu_builtin_p;
189 
190 #endif
191