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/* Definitions for TI C6X assembler.

   Copyright 2010

   Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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.

   GAS 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 GAS; see the file COPYING.  If not, write to the Free

   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA

   02110-1301, USA.  */

#define TC_TIC6X 1

#define TARGET_BYTES_BIG_ENDIAN 0

#define WORKING_DOT_WORD

#define DOUBLEBAR_PARALLEL

#define DWARF2_LINE_MIN_INSN_LENGTH 2

#define MD_APPLY_SYM_VALUE(FIX) 0

#define TC_PREDICATE_START_CHAR '['

#define TC_PREDICATE_END_CHAR ']'

/* For TI C6X, we keep spaces in what the preprocessor considers

   operands as they may separate functional unit specifiers from

   operands.  */

#define TC_KEEP_OPERAND_SPACES 1

#define TARGET_ARCH     bfd_arch_tic6x

#define TARGET_FORMAT   (target_big_endian      \

                         ? "elf32-tic6x-be"     \

                         : "elf32-tic6x-le")

typedef struct tic6x_label_list

{

  struct tic6x_label_list *next;

  symbolS *label;

} tic6x_label_list;

/* Must be consistent with the enum in tc-tic6x.c.  */

#define TIC6X_NUM_UNWIND_REGS 13

/* Unwinding information state.  */

typedef struct tic6x_unwind_info {

    int personality_index;

    symbolS *personality_routine;

    symbolS *function_start;

    segT saved_seg;

    subsegT saved_subseg;

    /* NULL if table entry is inline.  */

    symbolS *table_entry;

    char *frag_start;

    valueT data;

    /* 0 before .cfi_startproc

      -1 between .cfi_startproc and .handlerdata

      >0 between .handlerdata and .endp */

    int data_bytes;

    offsetT reg_offset[TIC6X_NUM_UNWIND_REGS];

    bfd_boolean reg_saved[TIC6X_NUM_UNWIND_REGS];

    int cfa_reg;

    int return_reg;

    unsigned safe_mask;

    unsigned compact_mask;

    unsigned reg_saved_mask;

    offsetT cfa_offset;

    bfd_boolean pop_rts;

    /* Only valid for UNWIND_OP_POP_REG */

    int saved_reg_count;

} tic6x_unwind_info;

typedef struct

{

  /* Any labels seen since the last instruction or data.  If not NULL,

     a following instruction may not have parallel bars, but must

     start a new execute packet.  */

  tic6x_label_list *label_list;

  /* Whether compact instructions are forbidden here.  */

  bfd_boolean nocmp;

  /* If there is a current execute packet, the frag being used for

     that execute packet.  */

  fragS *execute_packet_frag;

  /* If there is a current execute packet, a pointer to the

     least-significant byte of the last instruction in it (for setting

     the p-bit).  */

  char *last_insn_lsb;

  /* If there has been an SPMASK instruction in the current execute

     packet, a pointer to the first byte in it (for processing

     ||^); otherwise NULL.  */

  char *spmask_addr;

  /* The functional units used in the current execute packet, recorded

     by setting the same bits as would be set in the 32-bit SPMASK

     instruction.  */

  unsigned int func_units_used;

  /* If an SPLOOP-family instruction has been seen, and a following

     SPKERNEL-family instruction has not yet been seen, the ii value

     from the SPLOOP instruction (in the range 1 to 14); otherwise

     0.  */

  int sploop_ii;

  /* Bit N indicates that an R_C6000_NONE relocation has been output for

     __c6xabi_unwind_cpp_prN already if set. This enables dependencies to be

     emitted only once per section, to save unnecessary bloat.  */

  unsigned int marked_pr_dependency;

  tic6x_unwind_info *unwind;

  tic6x_unwind_info *text_unwind;

} tic6x_segment_info_type;

#define TC_SEGMENT_INFO_TYPE tic6x_segment_info_type

typedef struct

{

  /* Whether this machine-dependent frag is used for instructions (as

     opposed to code alignment).  */

  bfd_boolean is_insns;

  /* For a frag used for instructions, whether it is may cross a fetch

     packet boundary (subject to alignment requirements).  */

  bfd_boolean can_cross_fp_boundary;

} tic6x_frag_info;

#define TC_FRAG_TYPE tic6x_frag_info

#define TC_FRAG_INIT(fragP) tic6x_frag_init (fragP)

extern void tic6x_frag_init (fragS *fragp);

typedef struct

{

  /* Whether this fix was for an ADDA instruction.  If so, a constant

     resulting from resolving the fix should be implicitly shifted

     left (it represents a value to be encoded literally in the

     instruction, whereas a non-constant represents a DP-relative

     value counting in the appropriate units).  */

  bfd_boolean fix_adda;

  /* The symbol to be subtracted in case of a PCR_H16 or PCR_L16

     reloc.  */

  symbolS *fix_subsy;

} tic6x_fix_info;

#define TC_FIX_TYPE tic6x_fix_info

#define TC_INIT_FIX_DATA(fixP) tic6x_init_fix_data (fixP)

struct fix;

extern void tic6x_init_fix_data (struct fix *fixP);

#define md_after_parse_args() tic6x_after_parse_args ()

extern void tic6x_after_parse_args (void);

#define md_cleanup() tic6x_cleanup ()

extern void tic6x_cleanup (void);

#define md_cons_align(n) tic6x_cons_align (n)

extern void tic6x_cons_align (int n);

#define md_do_align(n, fill, len, max, label)   \

  do {                                          \

    if (tic6x_do_align (n, fill, len, max))     \

      goto label;                               \

  } while (0)

extern bfd_boolean tic6x_do_align (int n, char *fill, int len, int max);

#define CONVERT_SYMBOLIC_ATTRIBUTE(name)        \

  tic6x_convert_symbolic_attribute (name)

extern int tic6x_convert_symbolic_attribute (const char *);

#define md_end() tic6x_end ();

extern void tic6x_end (void);

#define md_parse_name(name, exprP, mode, nextcharP)     \

  tic6x_parse_name (name, exprP, mode, nextcharP)

extern int tic6x_parse_name (const char *name, expressionS *exprP,

                             enum expr_mode mode, char *nextchar);

#define MD_PCREL_FROM_SECTION(FIX, SEC) tic6x_pcrel_from_section (FIX, SEC)

extern long tic6x_pcrel_from_section (struct fix *fixp, segT sec);

#define md_start_line_hook() tic6x_start_line_hook ()

extern void tic6x_start_line_hook (void);

#define TC_CONS_FIX_NEW(frag, where, size, exp) \

  tic6x_cons_fix_new (frag, where, size, exp)

extern void tic6x_cons_fix_new (fragS *frag, int where, int size,

                                expressionS *exp);

#define tc_fix_adjustable(FIX) tic6x_fix_adjustable (FIX)

extern bfd_boolean tic6x_fix_adjustable (struct fix *);

#define tc_frob_label(sym) tic6x_frob_label (sym)

extern void tic6x_frob_label (symbolS *sym);

#define tc_init_after_args() tic6x_init_after_args ()

extern void tic6x_init_after_args (void);

#define tc_unrecognized_line(c) tic6x_unrecognized_line (c)

extern int tic6x_unrecognized_line (int c);

/* We want .cfi_* pseudo-ops for generating unwind info.  */

#define TARGET_USE_CFIPOP              1

/* CFI hooks.  */

#define tc_regname_to_dw2regnum            tic6x_regname_to_dw2regnum

int tic6x_regname_to_dw2regnum (char *regname);

#define tc_cfi_frame_initial_instructions  tic6x_frame_initial_instructions

void tic6x_frame_initial_instructions (void);

/* The return register is B3.  */

#define DWARF2_DEFAULT_RETURN_COLUMN  (16 + 3)

/* Registers are generally saved at negative offsets to the CFA.  */

#define DWARF2_CIE_DATA_ALIGNMENT     (-4)

#define tc_cfi_startproc tic6x_cfi_startproc

void tic6x_cfi_startproc (void);

#define tc_cfi_endproc tic6x_cfi_endproc

struct fde_entry;

void tic6x_cfi_endproc (struct fde_entry *fde);

#define tc_cfi_section_name ".c6xabi.exidx"