mips.c

linux下编程用 编译软件

   libgcc routine.  */
#define SOFT_FP_COSTS COSTS_N_INSNS (256), /* fp_add */       \
                      COSTS_N_INSNS (256), /* fp_mult_sf */   \
                      COSTS_N_INSNS (256), /* fp_mult_df */   \
                      COSTS_N_INSNS (256), /* fp_div_sf */    \
                      COSTS_N_INSNS (256)  /* fp_div_df */

static struct mips_rtx_cost_data const mips_rtx_cost_data[PROCESSOR_MAX] =
  {
    { /* R3000 */
      COSTS_N_INSNS (2),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (5),            /* fp_mult_df */
      COSTS_N_INSNS (12),           /* fp_div_sf */
      COSTS_N_INSNS (19),           /* fp_div_df */
      COSTS_N_INSNS (12),           /* int_mult_si */
      COSTS_N_INSNS (12),           /* int_mult_di */
      COSTS_N_INSNS (35),           /* int_div_si */
      COSTS_N_INSNS (35),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */

    },
    { /* 4KC */
      SOFT_FP_COSTS,
      COSTS_N_INSNS (6),            /* int_mult_si */
      COSTS_N_INSNS (6),            /* int_mult_di */
      COSTS_N_INSNS (36),           /* int_div_si */
      COSTS_N_INSNS (36),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* 4KP */
      SOFT_FP_COSTS,
      COSTS_N_INSNS (36),           /* int_mult_si */
      COSTS_N_INSNS (36),           /* int_mult_di */
      COSTS_N_INSNS (37),           /* int_div_si */
      COSTS_N_INSNS (37),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* 5KC */
      SOFT_FP_COSTS,
      COSTS_N_INSNS (4),            /* int_mult_si */
      COSTS_N_INSNS (11),           /* int_mult_di */
      COSTS_N_INSNS (36),           /* int_div_si */
      COSTS_N_INSNS (68),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* 5KF */
      COSTS_N_INSNS (4),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (5),            /* fp_mult_df */
      COSTS_N_INSNS (17),           /* fp_div_sf */
      COSTS_N_INSNS (32),           /* fp_div_df */
      COSTS_N_INSNS (4),            /* int_mult_si */
      COSTS_N_INSNS (11),           /* int_mult_di */
      COSTS_N_INSNS (36),           /* int_div_si */
      COSTS_N_INSNS (68),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* 20KC */
      DEFAULT_COSTS
    },
    { /* 24k */
      COSTS_N_INSNS (8),            /* fp_add */
      COSTS_N_INSNS (8),            /* fp_mult_sf */
      COSTS_N_INSNS (10),           /* fp_mult_df */
      COSTS_N_INSNS (34),           /* fp_div_sf */
      COSTS_N_INSNS (64),           /* fp_div_df */
      COSTS_N_INSNS (5),            /* int_mult_si */
      COSTS_N_INSNS (5),            /* int_mult_di */
      COSTS_N_INSNS (41),           /* int_div_si */
      COSTS_N_INSNS (41),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* 24kx */
      COSTS_N_INSNS (4),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (5),            /* fp_mult_df */
      COSTS_N_INSNS (17),           /* fp_div_sf */
      COSTS_N_INSNS (32),           /* fp_div_df */
      COSTS_N_INSNS (5),            /* int_mult_si */
      COSTS_N_INSNS (5),            /* int_mult_di */
      COSTS_N_INSNS (41),           /* int_div_si */
      COSTS_N_INSNS (41),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* M4k */
      DEFAULT_COSTS
    },
    { /* R3900 */
      COSTS_N_INSNS (2),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (5),            /* fp_mult_df */
      COSTS_N_INSNS (12),           /* fp_div_sf */
      COSTS_N_INSNS (19),           /* fp_div_df */
      COSTS_N_INSNS (2),            /* int_mult_si */
      COSTS_N_INSNS (2),            /* int_mult_di */
      COSTS_N_INSNS (35),           /* int_div_si */
      COSTS_N_INSNS (35),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R6000 */
      COSTS_N_INSNS (3),            /* fp_add */
      COSTS_N_INSNS (5),            /* fp_mult_sf */
      COSTS_N_INSNS (6),            /* fp_mult_df */
      COSTS_N_INSNS (15),           /* fp_div_sf */
      COSTS_N_INSNS (16),           /* fp_div_df */
      COSTS_N_INSNS (17),           /* int_mult_si */
      COSTS_N_INSNS (17),           /* int_mult_di */
      COSTS_N_INSNS (38),           /* int_div_si */
      COSTS_N_INSNS (38),           /* int_div_di */
                       2,           /* branch_cost */
                       6            /* memory_latency */
    },
    { /* R4000 */
       COSTS_N_INSNS (6),           /* fp_add */
       COSTS_N_INSNS (7),           /* fp_mult_sf */
       COSTS_N_INSNS (8),           /* fp_mult_df */
       COSTS_N_INSNS (23),          /* fp_div_sf */
       COSTS_N_INSNS (36),          /* fp_div_df */
       COSTS_N_INSNS (10),          /* int_mult_si */
       COSTS_N_INSNS (10),          /* int_mult_di */
       COSTS_N_INSNS (69),          /* int_div_si */
       COSTS_N_INSNS (69),          /* int_div_di */
                        2,          /* branch_cost */
                        6           /* memory_latency */
    },
    { /* R4100 */
      DEFAULT_COSTS
    },
    { /* R4111 */
      DEFAULT_COSTS
    },
    { /* R4120 */
      DEFAULT_COSTS
    },
    { /* R4130 */
      /* The only costs that appear to be updated here are
	 integer multiplication.  */
      SOFT_FP_COSTS,
      COSTS_N_INSNS (4),            /* int_mult_si */
      COSTS_N_INSNS (6),            /* int_mult_di */
      COSTS_N_INSNS (69),           /* int_div_si */
      COSTS_N_INSNS (69),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R4300 */
      DEFAULT_COSTS
    },
    { /* R4600 */
      DEFAULT_COSTS
    },
    { /* R4650 */
      DEFAULT_COSTS
    },
    { /* R5000 */
      COSTS_N_INSNS (6),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (5),            /* fp_mult_df */
      COSTS_N_INSNS (23),           /* fp_div_sf */
      COSTS_N_INSNS (36),           /* fp_div_df */
      COSTS_N_INSNS (5),            /* int_mult_si */
      COSTS_N_INSNS (5),            /* int_mult_di */
      COSTS_N_INSNS (36),           /* int_div_si */
      COSTS_N_INSNS (36),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R5400 */
      COSTS_N_INSNS (6),            /* fp_add */
      COSTS_N_INSNS (5),            /* fp_mult_sf */
      COSTS_N_INSNS (6),            /* fp_mult_df */
      COSTS_N_INSNS (30),           /* fp_div_sf */
      COSTS_N_INSNS (59),           /* fp_div_df */
      COSTS_N_INSNS (3),            /* int_mult_si */
      COSTS_N_INSNS (4),            /* int_mult_di */
      COSTS_N_INSNS (42),           /* int_div_si */
      COSTS_N_INSNS (74),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R5500 */
      COSTS_N_INSNS (6),            /* fp_add */
      COSTS_N_INSNS (5),            /* fp_mult_sf */
      COSTS_N_INSNS (6),            /* fp_mult_df */
      COSTS_N_INSNS (30),           /* fp_div_sf */
      COSTS_N_INSNS (59),           /* fp_div_df */
      COSTS_N_INSNS (5),            /* int_mult_si */
      COSTS_N_INSNS (9),            /* int_mult_di */
      COSTS_N_INSNS (42),           /* int_div_si */
      COSTS_N_INSNS (74),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R7000 */
      /* The only costs that are changed here are
	 integer multiplication.  */
      COSTS_N_INSNS (6),            /* fp_add */
      COSTS_N_INSNS (7),            /* fp_mult_sf */
      COSTS_N_INSNS (8),            /* fp_mult_df */
      COSTS_N_INSNS (23),           /* fp_div_sf */
      COSTS_N_INSNS (36),           /* fp_div_df */
      COSTS_N_INSNS (5),            /* int_mult_si */
      COSTS_N_INSNS (9),            /* int_mult_di */
      COSTS_N_INSNS (69),           /* int_div_si */
      COSTS_N_INSNS (69),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* R8000 */
      DEFAULT_COSTS
    },
    { /* R9000 */
      /* The only costs that are changed here are
	 integer multiplication.  */
      COSTS_N_INSNS (6),            /* fp_add */
      COSTS_N_INSNS (7),            /* fp_mult_sf */
      COSTS_N_INSNS (8),            /* fp_mult_df */
      COSTS_N_INSNS (23),           /* fp_div_sf */
      COSTS_N_INSNS (36),           /* fp_div_df */
      COSTS_N_INSNS (3),            /* int_mult_si */
      COSTS_N_INSNS (8),            /* int_mult_di */
      COSTS_N_INSNS (69),           /* int_div_si */
      COSTS_N_INSNS (69),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* SB1 */
      COSTS_N_INSNS (4),            /* fp_add */
      COSTS_N_INSNS (4),            /* fp_mult_sf */
      COSTS_N_INSNS (4),            /* fp_mult_df */
      COSTS_N_INSNS (24),           /* fp_div_sf */
      COSTS_N_INSNS (32),           /* fp_div_df */
      COSTS_N_INSNS (3),            /* int_mult_si */
      COSTS_N_INSNS (4),            /* int_mult_di */
      COSTS_N_INSNS (36),           /* int_div_si */
      COSTS_N_INSNS (68),           /* int_div_di */
                       1,           /* branch_cost */
                       4            /* memory_latency */
    },
    { /* SR71000 */
      DEFAULT_COSTS
    },
  };


/* Nonzero if -march should decide the default value of MASK_SOFT_FLOAT.  */
#ifndef MIPS_MARCH_CONTROLS_SOFT_FLOAT
#define MIPS_MARCH_CONTROLS_SOFT_FLOAT 0
#endif

/* Initialize the GCC target structure.  */
#undef TARGET_ASM_ALIGNED_HI_OP
#define TARGET_ASM_ALIGNED_HI_OP "\t.half\t"
#undef TARGET_ASM_ALIGNED_SI_OP
#define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
#undef TARGET_ASM_ALIGNED_DI_OP
#define TARGET_ASM_ALIGNED_DI_OP "\t.dword\t"

#undef TARGET_ASM_FUNCTION_PROLOGUE
#define TARGET_ASM_FUNCTION_PROLOGUE mips_output_function_prologue
#undef TARGET_ASM_FUNCTION_EPILOGUE
#define TARGET_ASM_FUNCTION_EPILOGUE mips_output_function_epilogue
#undef TARGET_ASM_SELECT_RTX_SECTION
#define TARGET_ASM_SELECT_RTX_SECTION mips_select_rtx_section
#undef TARGET_ASM_FUNCTION_RODATA_SECTION
#define TARGET_ASM_FUNCTION_RODATA_SECTION mips_function_rodata_section

#undef TARGET_SCHED_REORDER
#define TARGET_SCHED_REORDER mips_sched_reorder
#undef TARGET_SCHED_VARIABLE_ISSUE
#define TARGET_SCHED_VARIABLE_ISSUE mips_variable_issue
#undef TARGET_SCHED_ADJUST_COST
#define TARGET_SCHED_ADJUST_COST mips_adjust_cost
#undef TARGET_SCHED_ISSUE_RATE
#define TARGET_SCHED_ISSUE_RATE mips_issue_rate
#undef TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD
#define TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD \
  mips_multipass_dfa_lookahead

#undef TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS		\
  (TARGET_DEFAULT				\
   | TARGET_CPU_DEFAULT				\
   | TARGET_ENDIAN_DEFAULT			\
   | TARGET_FP_EXCEPTIONS_DEFAULT		\
   | MASK_CHECK_ZERO_DIV			\
   | MASK_FUSED_MADD)
#undef TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION mips_handle_option

#undef TARGET_FUNCTION_OK_FOR_SIBCALL
#define TARGET_FUNCTION_OK_FOR_SIBCALL mips_function_ok_for_sibcall

#undef TARGET_VALID_POINTER_MODE
#define TARGET_VALID_POINTER_MODE mips_valid_pointer_mode
#undef TARGET_RTX_COSTS
#define TARGET_RTX_COSTS mips_rtx_costs
#undef TARGET_ADDRESS_COST
#define TARGET_ADDRESS_COST mips_address_cost

#undef TARGET_IN_SMALL_DATA_P
#define TARGET_IN_SMALL_DATA_P mips_in_small_data_p

#undef TARGET_MACHINE_DEPENDENT_REORG
#define TARGET_MACHINE_DEPENDENT_REORG mips_reorg

#undef TARGET_ASM_FILE_START
#undef TARGET_ASM_FILE_END
#define TARGET_ASM_FILE_START mips_file_start
#define TARGET_ASM_FILE_END mips_file_end
#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true

#undef TARGET_INIT_LIBFUNCS
#define TARGET_INIT_LIBFUNCS mips_init_libfuncs

#undef TARGET_BUILD_BUILTIN_VA_LIST
#define TARGET_BUILD_BUILTIN_VA_LIST mips_build_builtin_va_list
#undef TARGET_GIMPLIFY_VA_ARG_EXPR
#define TARGET_GIMPLIFY_VA_ARG_EXPR mips_gimplify_va_arg_expr

#undef TARGET_PROMOTE_FUNCTION_ARGS
#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_tree_true
#undef TARGET_PROMOTE_FUNCTION_RETURN
#define TARGET_PROMOTE_FUNCTION_RETURN hook_bool_tree_true
#undef TARGET_PROMOTE_PROTOTYPES
#define TARGET_PROMOTE_PROTOTYPES hook_bool_tree_true

#undef TARGET_RETURN_IN_MEMORY
#define TARGET_RETURN_IN_MEMORY mips_return_in_memory
#undef TARGET_RETURN_IN_MSB
#define TARGET_RETURN_IN_MSB mips_return_in_msb

#undef TARGET_ASM_OUTPUT_MI_THUNK
#define TARGET_ASM_OUTPUT_MI_THUNK mips_output_mi_thunk
#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
#define TARGET_ASM_CAN_OUTPUT_MI_THUNK hook_bool_tree_hwi_hwi_tree_true

#undef TARGET_SETUP_INCOMING_VARARGS
#define TARGET_SETUP_INCOMING_VARARGS mips_setup_incoming_varargs
#undef TARGET_STRICT_ARGUMENT_NAMING
#define TARGET_STRICT_ARGUMENT_NAMING mips_strict_argument_naming
#undef TARGET_MUST_PASS_IN_STACK
#define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
#undef TARGET_PASS_BY_REFERENCE
#define TARGET_PASS_BY_REFERENCE mips_pass_by_reference
#undef TARGET_CALLEE_COPIES
#define TARGET_CALLEE_COPIES mips_callee_copies
#undef TARGET_ARG_PARTIAL_BYTES
#define TARGET_ARG_PARTIAL_BYTES mips_arg_partial_bytes

#undef TARGET_VECTOR_MODE_SUPPORTED_P
#define TARGET_VECTOR_MODE_SUPPORTED_P mips_vector_mode_supported_p

#undef TARGET_INIT_BUILTINS
#define TARGET_INIT_BUILTINS mips_init_builtins
#undef TARGET_EXPAND_BUILTIN
#define TARGET_EXPAND_BUILTIN mips_expand_builtin

#undef TARGET_HAVE_TLS
#define TARGET_HAVE_TLS HAVE_AS_TLS

#undef TARGET_CANNOT_FORCE_CONST_MEM
#define TARGET_CANNOT_FORCE_CONST_MEM mips_cannot_force_const_mem

#undef TARGET_ENCODE_SECTION_INFO
#define TARGET_ENCODE_SECTION_INFO mips_encode_section_info

#undef TARGET_ATTRIBUTE_TABLE
#define TARGET_ATTRIBUTE_TABLE mips_attribute_table

struct gcc_target targetm = TARGET_INITIALIZER;

/* Classify symbol X, which must be a SYMBOL_REF or a LABEL_REF.  */

static enum mips_symbol_type
mips_classify_symbol (rtx x)
{
  if (GET_CODE (x) == LABEL_REF)
    {
      if (TARGET_MIPS16)
	return SYMBOL_CONSTANT_POOL;