gcc/config/avr/builtins.def

   1 /* Copyright (C) 2012-2013 Free Software Foundation, Inc.
   2
   3    This file is part of GCC.
   4
   5    GCC is free software; you can redistribute it and/or modify it under
   6    the terms of the GNU General Public License as published by the Free
   7    Software Foundation; either version 3, or (at your option) any later
   8    version.
   9
  10    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  11    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13    for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with GCC; see the file COPYING3.  If not see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This file contains the definitions and documentation for the
  20    builtins defined in the AVR part of the GNU compiler.
  21    Befor including this file, define a macro
  22
  23    DEF_BUILTIN(NAME, N_ARGS, TYPE, ICODE, LIBNAME)
  24
  25    NAME:    `__builtin_avr_name' will be the user-level name of the builtin.
  26             `AVR_BUILTIN_NAME' will be the internal builtin's id.
  27    N_ARGS:  Number of input arguments.  If special treatment is needed,
  28             set to -1 and handle it by hand, see avr.c:avr_expand_builtin().
  29    TYPE:    A tree node describing the prototype of the built-in.
  30    ICODE:   Name of attached insn or expander.  If special treatment in avr.c
  31             is needed to expand the built-in, use `nothing'.
  32    LIBNAME: Name of the attached implementation in libgcc which is used if
  33             the builtin cannot be folded away and there is no insn.  */
  34
  35 /* Mapped to respective instruction.  */
  36
  37 DEF_BUILTIN (NOP,  -1, void_ftype_void, nothing, NULL)
  38 DEF_BUILTIN (SEI,   0, void_ftype_void, enable_interrupt, NULL)
  39 DEF_BUILTIN (CLI,   0, void_ftype_void, disable_interrupt, NULL)
  40 DEF_BUILTIN (WDR,   0, void_ftype_void, wdr, NULL)
  41 DEF_BUILTIN (SLEEP, 0, void_ftype_void, sleep, NULL)
  42
  43 /* Mapped to respective instruction but might also be folded away
  44    or emit as libgcc call if ISA does not provide the instruction.  */
  45
  46 DEF_BUILTIN (SWAP,   1, uchar_ftype_uchar,      rotlqi3_4, NULL)
  47 DEF_BUILTIN (FMUL,   2, uint_ftype_uchar_uchar, fmul, NULL)
  48 DEF_BUILTIN (FMULS,  2, int_ftype_char_char,    fmuls, NULL)
  49 DEF_BUILTIN (FMULSU, 2, int_ftype_char_uchar,   fmulsu, NULL)
  50
  51 /* More complex stuff that cannot be mapped 1:1 to an instruction.  */
  52
  53 DEF_BUILTIN (DELAY_CYCLES, -1, void_ftype_ulong, nothing, NULL)
  54 DEF_BUILTIN (INSERT_BITS, 3, uchar_ftype_ulong_uchar_uchar, insert_bits, NULL)
  55 DEF_BUILTIN (FLASH_SEGMENT, 1, char_ftype_const_memx_ptr, flash_segment, NULL)
  56
  57 /* ISO/IEC TR 18037 "Embedded C"
  58    The following builtins are undocumented and used by stdfix.h.  */
  59
  60 /* 7.18a.6 The fixed-point intrinsic functions. */
  61
  62 /* 7.18a.6.2 The fixed-point absolute value functions. */
  63
  64 DEF_BUILTIN (ABSHR,   1, hr_ftype_hr,   ssabsqq2, NULL)
  65 DEF_BUILTIN (ABSR,    1, r_ftype_r,     ssabshq2, NULL)
  66 DEF_BUILTIN (ABSLR,   1, lr_ftype_lr,   ssabssq2, NULL)
  67 DEF_BUILTIN (ABSLLR,  1, llr_ftype_llr, nothing, "__ssabsdq2") // GCC extension
  68
  69 DEF_BUILTIN (ABSHK,   1, hk_ftype_hk,   ssabsha2, NULL)
  70 DEF_BUILTIN (ABSK,    1, k_ftype_k,     ssabssa2, NULL)
  71 DEF_BUILTIN (ABSLK,  -1, lk_ftype_lk,   nothing, "__ssabsda2")
  72 DEF_BUILTIN (ABSLLK, -1, llk_ftype_llk, nothing, "__ssabsta2") // GCC extension