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   1 /* Internal to rs6000 type, variable, and function declarations and
   2    definitons shared between the various rs6000 source files.
   3    Copyright (C) 1991-2019 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 extern section *toc_section;
  68
  69 #ifdef USING_ELFOS_H
  70 extern const char *rs6000_machine;
  71 #endif
  72
  73
  74 /* The VRSAVE bitmask puts bit %v0 as the most significant bit.  */
  75 #define ALTIVEC_REG_BIT(REGNO) (0x80000000 >> ((REGNO) - FIRST_ALTIVEC_REGNO))
  76
  77
  78 /* Declare functions in rs6000-logue.c or called in rs6000.c
  79    from rs6000-logue.c  */
  80
  81 extern int uses_TOC (void);
  82 extern bool rs6000_global_entry_point_needed_p (void);
  83 extern void rs6000_output_function_prologue (FILE *file);
  84 extern void rs6000_output_function_epilogue (FILE *file);
  85 extern bool rs6000_function_ok_for_sibcall (tree decl, tree exp);
  86 extern sbitmap rs6000_get_separate_components (void);
  87 extern sbitmap rs6000_components_for_bb (basic_block bb);
  88 extern void rs6000_disqualify_components (sbitmap components, edge e,
  89                                           sbitmap edge_components,
  90                                           bool /*is_prologue*/);
  91 extern void rs6000_emit_prologue_components (sbitmap components);
  92 extern void rs6000_emit_epilogue_components (sbitmap components);
  93 extern void rs6000_set_handled_components (sbitmap components);
  94 extern rs6000_stack_t * rs6000_stack_info (void);
  95 extern rtx create_TOC_reference (rtx symbol, rtx largetoc_reg);
  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
 104 /* Return true if the OFFSET is valid for the quad address instructions that
 105    use d-form (register + offset) addressing.  */
 106
 107 static inline bool
 108 quad_address_offset_p (HOST_WIDE_INT offset)
 109 {
 110   return (IN_RANGE (offset, -32768, 32767) && ((offset) & 0xf) == 0);
 111 }
 112
 113
 114 #endif