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/* Internal to rs6000 type, variable, and function declarations and
definitons shared between the various rs6000 source files.
Copyright (C) 1991-2020 Free Software Foundation, Inc.
Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_RS6000_INTERNAL_H
#define GCC_RS6000_INTERNAL_H
/* Structure used to define the rs6000 stack */
typedef struct rs6000_stack {
int reload_completed; /* stack info won't change from here on */
int first_gp_reg_save; /* first callee saved GP register used */
int first_fp_reg_save; /* first callee saved FP register used */
int first_altivec_reg_save; /* first callee saved AltiVec register used */
int lr_save_p; /* true if the link reg needs to be saved */
int cr_save_p; /* true if the CR reg needs to be saved */
unsigned int vrsave_mask; /* mask of vec registers to save */
int push_p; /* true if we need to allocate stack space */
int calls_p; /* true if the function makes any calls */
int world_save_p; /* true if we're saving *everything*:
r13-r31, cr, f14-f31, vrsave, v20-v31 */
enum rs6000_abi abi; /* which ABI to use */
int gp_save_offset; /* offset to save GP regs from initial SP */
int fp_save_offset; /* offset to save FP regs from initial SP */
int altivec_save_offset; /* offset to save AltiVec regs from initial SP */
int lr_save_offset; /* offset to save LR from initial SP */
int cr_save_offset; /* offset to save CR from initial SP */
int vrsave_save_offset; /* offset to save VRSAVE from initial SP */
int varargs_save_offset; /* offset to save the varargs registers */
int ehrd_offset; /* offset to EH return data */
int ehcr_offset; /* offset to EH CR field data */
int reg_size; /* register size (4 or 8) */
HOST_WIDE_INT vars_size; /* variable save area size */
int parm_size; /* outgoing parameter size */
int save_size; /* save area size */
int fixed_size; /* fixed size of stack frame */
int gp_size; /* size of saved GP registers */
int fp_size; /* size of saved FP registers */
int altivec_size; /* size of saved AltiVec registers */
int cr_size; /* size to hold CR if not in fixed area */
int vrsave_size; /* size to hold VRSAVE */
int altivec_padding_size; /* size of altivec alignment padding */
HOST_WIDE_INT total_size; /* total bytes allocated for stack */
int savres_strategy;
} rs6000_stack_t;
extern int need_toc_init;
extern char toc_label_name[10];
extern int rs6000_pic_labelno;
#ifdef USING_ELFOS_H
extern const char *rs6000_machine;
#endif
/* The VRSAVE bitmask puts bit %v0 as the most significant bit. */
#define ALTIVEC_REG_BIT(REGNO) (0x80000000 >> ((REGNO) - FIRST_ALTIVEC_REGNO))
/* Declare functions in rs6000-logue.c or called in rs6000.c
from rs6000-logue.c */
extern int uses_TOC (void);
extern bool rs6000_global_entry_point_needed_p (void);
extern void rs6000_output_function_prologue (FILE *file);
extern void rs6000_output_function_epilogue (FILE *file);
extern bool rs6000_function_ok_for_sibcall (tree decl, tree exp);
extern sbitmap rs6000_get_separate_components (void);
extern sbitmap rs6000_components_for_bb (basic_block bb);
extern void rs6000_disqualify_components (sbitmap components, edge e,
sbitmap edge_components,
bool /*is_prologue*/);
extern void rs6000_emit_prologue_components (sbitmap components);
extern void rs6000_emit_epilogue_components (sbitmap components);
extern void rs6000_set_handled_components (sbitmap components);
extern rs6000_stack_t * rs6000_stack_info (void);
extern rtx rs6000_got_sym (void);
extern struct machine_function *rs6000_init_machine_status (void);
extern bool save_reg_p (int reg);
extern const char * rs6000_machine_from_flags (void);
extern void emit_asm_machine (void);
extern bool rs6000_global_entry_point_prologue_needed_p (void);
extern bool rs6000_keep_leaf_when_profiled (void);
extern void rs6000_live_on_entry (bitmap regs);
/* Return true if the OFFSET is valid for the quad address instructions that
use d-form (register + offset) addressing. */
static inline bool
quad_address_offset_p (HOST_WIDE_INT offset)
{
return (IN_RANGE (offset, -32768, 32767) && ((offset) & 0xf) == 0);
}
/* Mach-O (Darwin) support for longcalls, emitted from rs6000-logue.c. */
#if TARGET_MACHO
typedef struct branch_island_d {
tree function_name;
tree label_name;
int line_number;
} branch_island;
extern vec<branch_island, va_gc> *branch_islands;
#endif
/* Declare functions in rs6000-call.c or called in rs6000.c
from rs6000-call.c */
extern int rs6000_darwin64_struct_check_p (machine_mode mode, const_tree type);
extern bool rs6000_discover_homogeneous_aggregate (machine_mode mode,
const_tree type,
machine_mode *elt_mode,
int *n_elts);
extern void rs6000_output_mi_thunk (FILE *file,
tree thunk_fndecl ATTRIBUTE_UNUSED,
HOST_WIDE_INT delta,
HOST_WIDE_INT vcall_offset,
tree function);
extern bool rs6000_output_addr_const_extra (FILE *file, rtx x);
extern bool rs6000_gimple_fold_builtin (gimple_stmt_iterator *gsi);
extern tree rs6000_build_builtin_va_list (void);
extern void rs6000_va_start (tree valist, rtx nextarg);
extern tree rs6000_gimplify_va_arg (tree valist, tree type, gimple_seq *pre_p,
gimple_seq *post_p);
extern machine_mode rs6000_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
machine_mode mode,
int *punsignedp ATTRIBUTE_UNUSED,
const_tree, int);
extern bool rs6000_return_in_memory (const_tree type,
const_tree fntype ATTRIBUTE_UNUSED);
extern bool rs6000_return_in_msb (const_tree valtype);
extern bool rs6000_pass_by_reference (cumulative_args_t,
const function_arg_info &);
extern void setup_incoming_varargs (cumulative_args_t,
const function_arg_info &, int *, int);
extern unsigned int rs6000_function_arg_boundary (machine_mode mode,
const_tree type);
extern bool rs6000_must_pass_in_stack (const function_arg_info &);
extern int rs6000_arg_partial_bytes (cumulative_args_t,
const function_arg_info &);
extern void rs6000_function_arg_advance (cumulative_args_t,
const function_arg_info &);
extern pad_direction rs6000_function_arg_padding (machine_mode mode,
const_tree type);
extern rtx rs6000_function_arg (cumulative_args_t, const function_arg_info &);
extern rtx rs6000_darwin64_record_arg (CUMULATIVE_ARGS *, const_tree,
bool, bool);
extern rtx rs6000_internal_arg_pointer (void);
extern void rs6000_init_builtins (void);
extern tree rs6000_builtin_decl (unsigned code,
bool initialize_p ATTRIBUTE_UNUSED);
extern rtx rs6000_expand_builtin (tree exp, rtx target,
rtx subtarget ATTRIBUTE_UNUSED,
machine_mode mode ATTRIBUTE_UNUSED,
int ignore ATTRIBUTE_UNUSED);
extern tree rs6000_fold_builtin (tree fndecl ATTRIBUTE_UNUSED,
int n_args ATTRIBUTE_UNUSED,
tree *args ATTRIBUTE_UNUSED,
bool ignore ATTRIBUTE_UNUSED);
#if TARGET_ELF
extern bool rs6000_passes_ieee128;
#endif
extern bool rs6000_passes_float;
extern bool rs6000_passes_long_double;
extern bool rs6000_passes_vector;
extern bool rs6000_returns_struct;
extern bool cpu_builtin_p;
#endif
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