gcc/config/i386/iamcu.h

   1 /* Definitions of target machine for Intel MCU psABI.
   2    Copyright (C) 2015-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 /* Intel MCU has no 80387.  Default to Intel MCU psABI.  */
  26 #undef TARGET_SUBTARGET_DEFAULT
  27 #define TARGET_SUBTARGET_DEFAULT MASK_IAMCU
  28
  29 /* Output at beginning of assembler file.  */
  30 /* The .file command should always begin the output.  */
  31 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
  32
  33 #undef ASM_COMMENT_START
  34 #define ASM_COMMENT_START "#"
  35
  36 #undef DBX_REGISTER_NUMBER
  37 #define DBX_REGISTER_NUMBER(n) \
  38   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  39
  40 #undef ASM_SPEC
  41 #define ASM_SPEC "--32 -march=iamcu"
  42
  43 #undef LINK_SPEC
  44 #define LINK_SPEC "-m elf_iamcu"
  45
  46 #undef ENDFILE_SPEC
  47 #define ENDFILE_SPEC ""
  48
  49 #undef STARTFILE_SPEC
  50 #define STARTFILE_SPEC "crt0.o%s"
  51
  52 #undef LIB_SPEC
  53 #define LIB_SPEC "--start-group -lc -lgloss --end-group"
  54
  55 /* A C statement (sans semicolon) to output to the stdio stream
  56    FILE the assembler definition of uninitialized global DECL named
  57    NAME whose size is SIZE bytes and alignment is ALIGN bytes.
  58    Try to use asm_output_aligned_bss to implement this macro.  */
  59
  60 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  61   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  62
  63 /* A C statement to output to the stdio stream FILE an assembler
  64    command to advance the location counter to a multiple of 1<<LOG
  65    bytes if it is within MAX_SKIP bytes.
  66
  67    This is used to align code labels according to Intel recommendations.  */
  68
  69 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  70   do {                                                                  \
  71     if ((LOG) != 0) {                                                   \
  72       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  73       else {                                                            \
  74         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  75         /* Make sure that we have at least 8 byte alignment if > 8 byte \
  76            alignment is preferred.  */                                  \
  77         if ((LOG) > 3                                                   \
  78             && (1 << (LOG)) > ((MAX_SKIP) + 1)                          \
  79             && (MAX_SKIP) >= 7)                                         \
  80           fputs ("\t.p2align 3\n", (FILE));                             \
  81       }                                                                 \
  82     }                                                                   \
  83   } while (0)
  84
  85 /* Handle special EH pointer encodings.  Absolute, pc-relative, and
  86    indirect are handled automatically.  */
  87 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
  88   do {                                                                  \
  89     if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel)         \
  90       {                                                                 \
  91         fputs (ASM_LONG, FILE);                                         \
  92         assemble_name (FILE, XSTR (ADDR, 0));                           \
  93         fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
  94         goto DONE;                                                      \
  95       }                                                                 \
  96   } while (0)
  97
  98 #undef SIZE_TYPE
  99 #define SIZE_TYPE "unsigned int"
 100
 101 #undef PTRDIFF_TYPE
 102 #define PTRDIFF_TYPE "int"
 103
 104 #undef WCHAR_TYPE
 105 #define WCHAR_TYPE "long int"
 106
 107 #undef WCHAR_TYPE_SIZE
 108 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 109
 110 /* Use int, instead of long int, for int32_t and uint32_t.  */
 111 #undef STDINT_LONG32
 112 #define STDINT_LONG32 0