1 /* Definitions for LynxOS on i386. 2 Copyright (C) 1993-2020 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 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #define TARGET_OS_CPP_BUILTINS() \ 21 do \ 22 { \ 23 builtin_define ("__LITTLE_ENDIAN__"); \ 24 builtin_define ("__x86__"); \ 25 } \ 26 while (0) 27 28 /* The svr4 ABI for the i386 says that records and unions are returned 29 in memory. */ 30 31 #define DEFAULT_PCC_STRUCT_RETURN 1 32 33 /* BSS_SECTION_ASM_OP gets defined i386/unix.h. */ 34 35 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 36 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 37 38 /* LynxOS's GDB counts the floating point registers from 16. */ 39 40 #undef DBX_REGISTER_NUMBER 41 #define DBX_REGISTER_NUMBER(n) \ 42 (TARGET_64BIT ? dbx64_register_map[n] \ 43 : (n) == 0 ? 0 \ 44 : (n) == 1 ? 2 \ 45 : (n) == 2 ? 1 \ 46 : (n) == 3 ? 3 \ 47 : (n) == 4 ? 6 \ 48 : (n) == 5 ? 7 \ 49 : (n) == 6 ? 5 \ 50 : (n) == 7 ? 4 \ 51 : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (int) (n) + 8 \ 52 : (-1)) 53 54 /* A C statement to output to the stdio stream FILE an assembler 55 command to advance the location counter to a multiple of 1<<LOG 56 bytes if it is within MAX_SKIP bytes. 57 58 This is used to align code labels according to Intel recommendations. */ 59 60 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 61 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ 62 do { \ 63 if ((LOG) != 0) { \ 64 if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1 << (LOG)) - 1) \ 65 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 66 else \ 67 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 68 } \ 69 } while (0) 70 #endif 71 72 /* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway. We define it in 73 config/lynx.h. */ 74 75 #undef SUBTARGET_EXTRA_SPECS 76 77 /* Undefine the definition from att.h to enable our default. */ 78 79 #undef ASM_OUTPUT_ALIGN 80 81 /* Undefine the definition from elfos.h to enable our default. */ 82 83 #undef PREFERRED_DEBUGGING_TYPE 84 85 /* The file i386.c defines TARGET_HAVE_TLS unconditionally if 86 HAVE_AS_TLS is defined. HAVE_AS_TLS is defined as gas support for 87 TLS is detected by configure. We undefine it here. */ 88 89 #undef HAVE_AS_TLS 90