Subversion Repositories openrisc

/* Definitions of target machine for GNU compiler for TILEPro.

   Copyright (C) 2011, 2012

   Free Software Foundation, Inc.

   Contributed by Walter Lee (walt@tilera.com)

   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/>.  */

/* This is used by tilepro_cpu_cpp_builtins to indicate the byte order

   we're compiling for.  */

#define TILEPRO_CPU_CPP_ENDIAN_BUILTINS()       \

  do                                            \

    {                                           \

      if (BYTES_BIG_ENDIAN)                     \

        builtin_define ("__BIG_ENDIAN__");      \

      else                                      \

        builtin_define ("__LITTLE_ENDIAN__");   \

    }                                           \

  while (0)

/* Target CPU builtins.  */

#define TARGET_CPU_CPP_BUILTINS() \

  tilepro_cpu_cpp_builtins (pfile)

#undef PTRDIFF_TYPE

#define PTRDIFF_TYPE "int"

#undef SIZE_TYPE

#define SIZE_TYPE "unsigned int"

/* Target machine storage layout */

#define BITS_BIG_ENDIAN 0

#define BYTES_BIG_ENDIAN 0

#define WORDS_BIG_ENDIAN 0

#define UNITS_PER_WORD 4

#define PARM_BOUNDARY 32

#define STACK_BOUNDARY 64

#define FUNCTION_BOUNDARY 64

#define BIGGEST_ALIGNMENT 64

#define STRICT_ALIGNMENT 1

#define PCC_BITFIELD_TYPE_MATTERS 1

#define FASTEST_ALIGNMENT 32

#define BIGGEST_FIELD_ALIGNMENT 64

/* Unaligned moves trap and are very slow.  */

#define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1

/* Make strings word-aligned so strcpy from constants will be

   faster.  */

#define CONSTANT_ALIGNMENT(EXP, ALIGN)  \

  ((TREE_CODE (EXP) == STRING_CST       \

    && (ALIGN) < FASTEST_ALIGNMENT)     \

   ? FASTEST_ALIGNMENT : (ALIGN))

/* Make arrays of chars word-aligned for the same reasons.  */

#define DATA_ALIGNMENT(TYPE, ALIGN)             \

  (TREE_CODE (TYPE) == ARRAY_TYPE               \

   && TYPE_MODE (TREE_TYPE (TYPE)) == QImode    \

   && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))

/* Make local arrays of chars word-aligned for the same reasons.  */

#define LOCAL_ALIGNMENT(TYPE, ALIGN) DATA_ALIGNMENT (TYPE, ALIGN)

/* Standard register usage.  */

#define FIRST_PSEUDO_REGISTER (64 + 3)

#define FIXED_REGISTERS \

 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \

  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \

  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \

  0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, \

  1, 1, 1}

#define CALL_USED_REGISTERS \

 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \

  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \

  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \

  0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \

  1, 1, 1}

#define CALL_REALLY_USED_REGISTERS \

 CALL_USED_REGISTERS

#define REG_ALLOC_ORDER {                               \

      10, 11, 12, 13, 14, /* call used */               \

      15, 16, 17, 18, 19,                               \

      20, 21, 22, 23, 24,                               \

      25, 26, 27, 28, 29,                               \

                                                        \

      9, 8, 7, 6, 5,      /* argument */                \

      4, 3, 2, 1, 0,                                     \

                                                        \

      55,                 /* return address */          \

                                                        \

      30, 31, 32, 33, 34, /* call saved registers */    \

      35, 36, 37, 38, 39,                               \

      40, 41, 42, 43, 44,                               \

      45, 46, 47, 48, 49,                               \

      50, 51,                                           \

                                                        \

      52,                 /* hard frame pointer */      \

      53, 54,             /* tp, sp */                  \

                                                        \

      56, 57, 58, 59, 60, /* special purpose */         \

      61, 62, 63, 64, 65, /* or fake registers */       \

      66                                                \

}

#define HARD_REGNO_NREGS(REGNO, MODE)   \

  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

/* All registers can hold all modes.  */

#define HARD_REGNO_MODE_OK(REGNO, MODE) 1

#define MODES_TIEABLE_P(MODE1, MODE2)  1

/* Register that holds an address into the text segment that can be

   used by pic code.  */

#define TILEPRO_PIC_TEXT_LABEL_REGNUM (flag_pic ? 50 : INVALID_REGNUM)

#define PIC_OFFSET_TABLE_REGNUM (flag_pic ? 51 : INVALID_REGNUM)

#define HARD_FRAME_POINTER_REGNUM 52

#define THREAD_POINTER_REGNUM 53

#define STACK_POINTER_REGNUM 54

#define TILEPRO_LINK_REGNUM 55

#define FRAME_POINTER_REGNUM 64

#define ARG_POINTER_REGNUM 65

/* Pseudo register used to enforce order between instructions that

   touch the networks.  */

#define TILEPRO_NETORDER_REGNUM 66

#define STATIC_CHAIN_REGNUM 10

enum reg_class

{

  NO_REGS,

  R0_REGS,

  R1_REGS,

  R2_REGS,

  R3_REGS,

  R4_REGS,

  R5_REGS,

  R6_REGS,

  R7_REGS,

  R8_REGS,

  R9_REGS,

  R10_REGS,

  ALL_REGS,

  LIM_REG_CLASSES

};

#define N_REG_CLASSES (int) LIM_REG_CLASSES

/* Since GENERAL_REGS is the same class as ALL_REGS, don't give it a

   different class number; just make it an alias.  */

#define GENERAL_REGS ALL_REGS

#define REG_CLASS_NAMES \

  { \

    "NO_REGS", \

    "R0_REGS", \

    "R1_REGS", \

    "R2_REGS", \

    "R3_REGS", \

    "R4_REGS", \

    "R5_REGS", \

    "R6_REGS", \

    "R7_REGS", \

    "R8_REGS", \

    "R9_REGS", \

    "R10_REGS", \

    "ALL_REGS" \

  }

#define REG_CLASS_CONTENTS \

  { \

    { 0 }, \

    { 1 << 0 }, \

    { 1 << 1 }, \

    { 1 << 2 }, \

    { 1 << 3 }, \

    { 1 << 4 }, \

    { 1 << 5 }, \

    { 1 << 6 }, \

    { 1 << 7 }, \

    { 1 << 8 }, \

    { 1 << 9 }, \

    { 1 << 10 }, \

    { 0xffffffff, 0xffffffff } \

  }

#define REGNO_REG_CLASS(REGNO) \

  ((unsigned)(REGNO) <= 10 ? \

   (enum reg_class)(R0_REGS + (REGNO)) : ALL_REGS)

#define INDEX_REG_CLASS NO_REGS

#define BASE_REG_CLASS ALL_REGS

#define PREFERRED_RELOAD_CLASS(X,CLASS)  (CLASS)

#define CLASS_MAX_NREGS(CLASS, MODE)    \

 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

/* Stack layout; function entry, exit and calling.  */

#define STACK_GROWS_DOWNWARD

#define FRAME_GROWS_DOWNWARD 1

#define STARTING_FRAME_OFFSET 0

#define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant ((FRAME), UNITS_PER_WORD)

#define FIRST_PARM_OFFSET(FNDECL) 0

#define ACCUMULATE_OUTGOING_ARGS 1

#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1

#define INCOMING_FRAME_SP_OFFSET 0

#define STACK_POINTER_OFFSET (2 * UNITS_PER_WORD)

#define ARG_POINTER_CFA_OFFSET(FNDECL) (-STACK_POINTER_OFFSET)

#define DEFAULT_PCC_STRUCT_RETURN 0

/* The first 10 registers may hold return value.  */

#define TILEPRO_NUM_RETURN_REGS 10

/* The first 10 registers hold function arguments.  */

#define TILEPRO_NUM_ARG_REGS 10

#define FUNCTION_ARG_REGNO_P(N) ((N) < TILEPRO_NUM_ARG_REGS)

/* The type used to store the number of words of arguments scanned so

   far during argument scanning.  This includes any space that is

   skipped.  */

#define CUMULATIVE_ARGS int

#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \

 ((CUM) = 0)

#define ELIMINABLE_REGS                                 \

  {{ARG_POINTER_REGNUM,  STACK_POINTER_REGNUM},         \

  {ARG_POINTER_REGNUM,   HARD_FRAME_POINTER_REGNUM},    \

  {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},         \

  {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}

#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \

  ((OFFSET) = tilepro_initial_elimination_offset((FROM),(TO)))

#define FUNCTION_PROFILER(FILE, LABELNO) \

  tilepro_function_profiler (FILE, LABELNO)

#define TRAMPOLINE_SIZE 48

#define TRAMPOLINE_ALIGNMENT 64

#define TRAMPOLINE_SECTION text_section

/* Call frame debugging information.  */

#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, TILEPRO_LINK_REGNUM)

#define RETURN_ADDR_RTX tilepro_return_addr

#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (TILEPRO_LINK_REGNUM)

#define DWARF_ZERO_REG 63

#define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N + 12) : INVALID_REGNUM)

#define EH_RETURN_STACKADJ_RTX  gen_rtx_REG (Pmode, 11)

#define EH_RETURN_HANDLER_RTX tilepro_eh_return_handler_rtx ()

#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \

  tilepro_asm_preferred_eh_data_format ((CODE), (GLOBAL))

/* Addressing modes, and classification of registers for them.  */

#define HAVE_POST_INCREMENT 1

#define HAVE_POST_DECREMENT 1

#define HAVE_POST_MODIFY_DISP 1

#define REGNO_OK_FOR_INDEX_P(regno) 0

#define REGNO_OK_FOR_BASE_P(regno)      \

  ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)

#define MAX_REGS_PER_ADDRESS 1

#define CONSTANT_ADDRESS_P(X) 0

#define LEGITIMATE_PIC_OPERAND_P(X) tilepro_legitimate_pic_operand_p (X)

#define CASE_VECTOR_MODE SImode

#define CASE_VECTOR_PC_RELATIVE 0

#define JUMP_TABLES_IN_TEXT_SECTION 0

#define DEFAULT_SIGNED_CHAR 1

#define MOVE_MAX UNITS_PER_WORD

/* Use a value of 11 for MOVE_RATIO and friends, because TILEPro

   returns structs as large as 10 words in registers.  Because of some

   some code generation inefficiency, we never get smaller code for

   turning that into a memcpy, so pick a value that guarantees this

   doesn't happen.  */

#define TILEPRO_CALL_RATIO 11

#define MOVE_RATIO(speed) ((speed) ? 15 : TILEPRO_CALL_RATIO)

#define CLEAR_RATIO(speed) ((speed) ? 15 : TILEPRO_CALL_RATIO)

#define SET_RATIO(speed) ((speed) ? 15 : TILEPRO_CALL_RATIO)

#define WORD_REGISTER_OPERATIONS

#define LOAD_EXTEND_OP(MODE) ZERO_EXTEND

#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)       \

  if (GET_MODE_CLASS (MODE) == MODE_INT         \

      && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \

    (MODE) = SImode;

/* Define SLOW_BYTE_ACCESS to avoid making a QI or HI mode

   register.  */

#define SLOW_BYTE_ACCESS 1

#define SHIFT_COUNT_TRUNCATED 1

#define SHORT_IMMEDIATES_SIGN_EXTEND

#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1

#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)

#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)

#define Pmode SImode

#define STORE_FLAG_VALUE 1

#define FUNCTION_MODE SImode

#define NO_FUNCTION_CSE 1

#define ADJUST_INSN_LENGTH(INSN, LENGTH) \

  ((LENGTH) = tilepro_adjust_insn_length ((INSN), (LENGTH)))

#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT

#define BRANCH_COST(speed_p, predictable_p) ((predictable_p) ? 2 : 6)

/* Control the assembler format that we output.  */

#undef NO_DOLLAR_IN_LABEL

#define ASM_COMMENT_START "##"

#define TEXT_SECTION_ASM_OP "\t.text"

#define DATA_SECTION_ASM_OP "\t.data"

#undef READONLY_DATA_SECTION_ASM_OP

#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata, \"a\""

#undef BSS_SECTION_ASM_OP

#define BSS_SECTION_ASM_OP      "\t.section\t.bss, \"wa\""

#undef INIT_SECTION_ASM_OP

#define INIT_SECTION_ASM_OP     "\t.section\t.init, \"ax\""

#undef FINI_SECTION_ASM_OP

#define FINI_SECTION_ASM_OP     "\t.section\t.fini, \"ax\""

#define GLOBAL_ASM_OP ".global "

#define SUPPORTS_WEAK 1

#define USER_LABEL_PREFIX ""

#define REGISTER_PREFIX ""

#define REGISTER_NAMES                                                  \

  { "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",       \

    "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",      \

    "r16",  "r17",  "r18",  "r19",  "r20",  "r21",  "r22",  "r23",      \

    "r24",  "r25",  "r26",  "r27",  "r28",  "r29",  "r30",  "r31",      \

    "r32",  "r33",  "r34",  "r35",  "r36",  "r37",  "r38",  "r39",      \

    "r40",  "r41",  "r42",  "r43",  "r44",  "r45",  "r46",  "r47",      \

    "r48",  "r49",  "r50",  "r51",  "r52",  "tp",   "sp",   "lr",       \

    "sn",   "idn0", "idn1", "udn0", "udn1", "udn2", "udn3", "zero",     \

    "?FRAME?", "?ARG?", "?NET?" }

/* This is used to help emit bundles.  */

#define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \

  tilepro_final_prescan_insn (insn)

/* This is used to help emit bundles.  */

#define ASM_OUTPUT_OPCODE(STREAM, PTR)  \

  (PTR = tilepro_asm_output_opcode (STREAM, PTR))

#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)            \

  do                                                    \

    {                                                   \

      char label[256];                                  \

      ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\

      fprintf (FILE, "\t.word ");                       \

      assemble_name (FILE, label);                      \

      fprintf (FILE, "\n");                             \

    }                                                   \

  while (0)

#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)        \

  do                                                            \

    {                                                           \

      char label[256];                                          \

      ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));        \

      fprintf (FILE, "\t.word ");                               \

      assemble_name (FILE, label);                              \

      ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL));          \

      fprintf (FILE, "-");                                      \

      assemble_name (FILE, label);                              \

      fprintf (FILE, "\n");                                     \

    }                                                           \

  while (0)

#define ASM_OUTPUT_ALIGN(FILE,LOG)  \

  do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", 1 << (LOG)); } while (0)

#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)    \

  ( fputs (".comm ", (FILE)),                           \

    assemble_name ((FILE), (NAME)),                     \

    fprintf ((FILE), ",%u\n", (unsigned int)(ROUNDED)))

#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)     \

  ( fputs (".lcomm ", (FILE)),                          \

    assemble_name ((FILE), (NAME)),                     \

    fprintf ((FILE), ",%u\n", (unsigned int)(ROUNDED)))

#define INIT_EXPANDERS tilepro_init_expanders ()

/* A C structure for machine-specific, per-function data.  This is

   added to the cfun structure.  */

typedef struct GTY(()) machine_function

{

  /* Symbol for the text label used for pic.  */

  rtx text_label_symbol;

  /* Register for the text label.  */

  rtx text_label_rtx;

  /* Register for the pic offset table.  */

  rtx got_rtx;

  /* The function calls tls_get_addr.  */

  int calls_tls_get_addr;

} machine_function;

#ifndef HAVE_AS_TLS

#define HAVE_AS_TLS 0

#endif