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- /* Definitions of target machine for GNU compiler.
- Hitachi H8/300 version generating coff
- Copyright (C) 1992, 1993 Free Software Foundation, Inc.
- Contributed by Steve Chamberlain (sac@cygnus.com)
-
- This file is part of GNU CC.
-
- GNU CC 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 2, or (at your option)
- any later version.
-
- GNU CC 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Names to predefine in the preprocessor for this target machine. */
-
- #define CPP_PREDEFINES "-D__H8300__ -D_DOUBLE_IS_32BITS -Acpu(h8300) -Amachine(h8300)"
-
- #define LIB_SPEC "%{mrelax:-relax} %{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
-
- /* Print subsidiary information on the compiler version in use. */
- #define TARGET_VERSION fprintf (stderr, " (Hitachi H8/300)");
-
- /* Run-time compilation parameters selecting different hardware subsets. */
- int target_flags;
-
- /* Macros used in the machine description to test the flags. */
-
- /* Macro to define tables used to set the flags.
- This is a list in braces of pairs in braces,
- each pair being { "NAME", VALUE }
- where VALUE is the bits to set or minus the bits to clear.
- An empty string NAME is used to identify the default VALUE. */
-
- #define TARGET_SWITCHES \
- { {"int32",8}, \
- {"long16",16}, \
- {"double64",32}, \
- {"addresses",64 }, \
- {"quickcall",128}, \
- {"slowbyte",256}, \
- {"noquick",512}, \
- {"relax",1024}, \
- { "", TARGET_DEFAULT}}
-
- #define OPTIMIZATION_OPTIONS(OPTIMIZE) \
- { \
- obey_regdecls = 0; \
- flag_omit_frame_pointer = (OPTIMIZE > 1); \
- }
-
- #define OVERRIDE_OPTIONS \
- { \
- flag_no_function_cse = 1; \
- }
-
- #define TARGET_INT32 (target_flags & 8)
- #define TARGET_LONG16 (target_flags & 16)
- #define TARGET_DOUBLE32 (!(target_flags & 32))
- #define TARGET_ADDRESSES (target_flags & 64)
- #define TARGET_QUICKCALL (target_flags & 128)
- #define TARGET_SLOWBYTE (target_flags & 256)
- #define TARGET_NOQUICK (target_flags & 512)
-
- /* Default target_flags if no switches specified. */
- #ifndef TARGET_DEFAULT
- #define TARGET_DEFAULT 0
- #endif
-
- #define TARGET_NO_IMPORT (target_flags & MASK_NO_IMPORT)
-
- /* Target machine storage layout. */
-
- /* Define this if most significant bit is lowest numbered
- in instructions that operate on numbered bit-fields.
- This is not true on the H8/300. */
- #define BITS_BIG_ENDIAN 0
-
- /* Define this if most significant byte of a word is the lowest numbered. */
- /* That is true on the H8/300. */
- #define BYTES_BIG_ENDIAN 1
-
- /* Define this if most significant word of a multiword number is lowest
- numbered.
-
- This is true on an H8/300 (actually we can make it up, but we choose to
- be consistent. */
- #define WORDS_BIG_ENDIAN 1
-
- /* Number of bits in an addressable storage unit */
- #define BITS_PER_UNIT 8
-
- #define UNITS_PER_PTR 2
-
- /* Width in bits of a "word", which is the contents of a machine register.
- Note that this is not necessarily the width of data type `int';
- if using 16-bit ints on a 68000, this would still be 32.
- But on a machine with 16-bit registers, this would be 16. */
- #define BITS_PER_WORD 16
- #define MAX_BITS_PER_WORD 16
-
- /* Width of a word, in units (bytes). */
- #define UNITS_PER_WORD 2
-
- /* Width in bits of a pointer.
- See also the macro `Pmode' defined below. */
- #define POINTER_SIZE 16
-
- #define SHORT_TYPE_SIZE 16
- #define INT_TYPE_SIZE (TARGET_INT32 ? 32 : 16)
- #define LONG_TYPE_SIZE 32
- #define LONG_LONG_TYPE_SIZE 32
- #define DOUBLE_TYPE_SIZE (TARGET_DOUBLE32 ? 32 : 64)
- #define FLOAT_TYPE_SIZE 32
- #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
-
- #define MAX_FIXED_MODE_SIZE 32
-
- /* Allocation boundary (in *bits*) for storing arguments in argument list. */
- #define PARM_BOUNDARY 16
-
- /* Allocation boundary (in *bits*) for the code of a function. */
- #define FUNCTION_BOUNDARY 16
-
- /* Alignment of field after `int : 0' in a structure. */
- #define EMPTY_FIELD_BOUNDARY (16)
-
- /* Every structure's size must be a multiple of this. */
- #define STRUCTURE_SIZE_BOUNDARY 16
-
- /* A bitfield declared as `int' forces `int' alignment for the struct. */
- #define PCC_BITFIELD_TYPE_MATTERS 0
-
- /* No data type wants to be aligned rounder than this. */
- #define BIGGEST_ALIGNMENT 16
-
- /* No structure field wants to be aligned rounder than this. */
- #define BIGGEST_FIELD_ALIGNMENT 16
-
- /* The stack goes in 16 bit lumps. */
- #define STACK_BOUNDARY 16
-
- /* Define this if move instructions will actually fail to work
- when given unaligned data. */
- #define STRICT_ALIGNMENT 1
-
- /* Standard register usage. */
-
- /* Number of actual hardware registers.
- The hardware registers are assigned numbers for the compiler
- from 0 to just below FIRST_PSEUDO_REGISTER.
-
- All registers that the compiler knows about must be given numbers,
- even those that are not normally considered general registers.
-
- Reg 8 does not correspond to any hardware register, but instead
- appears in the RTL as an argument pointer prior to reload, and is
- eliminated during reloading in favor of either the stack or frame
- pointer. */
- #define FIRST_PSEUDO_REGISTER 9
-
- /* 1 for registers that have pervasive standard uses
- and are not available for the register allocator.
-
- r7 is the stack pointer, r8 is the arg pointer. */
- #define FIXED_REGISTERS \
- { 0,0,0,0, 0,0,0,1, 1 }
-
- /* 1 for registers not available across function calls.
- These must include the FIXED_REGISTERS and also any
- registers that can be used without being saved.
- The latter must include the registers where values are returned
- and the register where structure-value addresses are passed.
- Aside from that, you can include as many other registers as you
- like.
-
- The H8/300 destroys r0, r1, r4 and r5. */
-
- #define CALL_USED_REGISTERS \
- {1,1,0,0, 1,1,0,1, 1 }
-
- /* This is the order in which to allocate registers
- normally. */
- #define REG_ALLOC_ORDER { 0, 1, 4, 5, 2, 3, 6, 7, 8 }
-
- /* Return number of consecutive hard regs needed starting at reg REGNO
- to hold something of mode MODE.
-
- This is ordinarily the length in words of a value of mode MODE
- but can be less for certain modes in special long registers. */
- #define HARD_REGNO_NREGS(REGNO, MODE) \
- ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
-
- /* Value is 1 if hard register REGNO can hold a value of machine-mode
- MODE.
-
- If an even reg, then anything goes. Otherwise the mode must be QI
- or HI. */
- #define HARD_REGNO_MODE_OK(REGNO, MODE) \
- ((((REGNO) & 1) == 0) || (MODE == HImode) || (MODE == QImode))
-
- /* Value is 1 if it is a good idea to tie two pseudo registers
- when one has mode MODE1 and one has mode MODE2.
- If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
- for any hard reg, then this must be 0 for correct output. */
- #define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) == (MODE2))
-
- /* Specify the registers used for certain standard purposes.
- The values of these macros are register numbers. */
-
- /* H8/300 pc is not overloaded on a register. */
- /*#define PC_REGNUM 15*/
-
- /* Register to use for pushing function arguments. */
- #define STACK_POINTER_REGNUM 7
-
- /* Base register for access to local variables of the function. */
- #define FRAME_POINTER_REGNUM 6
-
- /* Value should be nonzero if functions must have frame pointers.
- Zero means the frame pointer need not be set up (and parms
- may be accessed via the stack pointer) in functions that seem suitable.
- This is computed in `reload', in reload1.c. */
- #define FRAME_POINTER_REQUIRED 0
-
- /* Base register for access to arguments of the function. */
- #define ARG_POINTER_REGNUM 8
-
- /* Register in which static-chain is passed to a function. */
- #define STATIC_CHAIN_REGNUM 0
-
- /* Define the classes of registers for register constraints in the
- machine description. Also define ranges of constants.
-
- One of the classes must always be named ALL_REGS and include all hard regs.
- If there is more than one class, another class must be named NO_REGS
- and contain no registers.
-
- The name GENERAL_REGS must be the name of a class (or an alias for
- another name such as ALL_REGS). This is the class of registers
- that is allowed by "g" or "r" in a register constraint.
- Also, registers outside this class are allocated only when
- instructions express preferences for them.
-
- The classes must be numbered in nondecreasing order; that is,
- a larger-numbered class must never be contained completely
- in a smaller-numbered class.
-
- For any two classes, it is very desirable that there be another
- class that represents their union. */
-
- /* The H8/300 has only one kind of register, but we mustn't do byte by
- byte operations on the sp, so we keep it as a different class. */
-
- enum reg_class { NO_REGS, LONG_REGS, GENERAL_REGS, SP_REG, ALL_REGS, LIM_REG_CLASSES };
-
- #define N_REG_CLASSES (int) LIM_REG_CLASSES
-
- /* Give names of register classes as strings for dump file. */
-
- #define REG_CLASS_NAMES \
- {"NO_REGS", "LONG_REGS", "GENERAL_REGS", "SP_REG", "ALL_REGS", "LIM_REGS"}
-
- /* Define which registers fit in which classes.
- This is an initializer for a vector of HARD_REG_SET
- of length N_REG_CLASSES. */
-
- #define REG_CLASS_CONTENTS \
- { 0, /* No regs */ \
- 0x7f, /* LONG_REGS */ \
- 0x7f, /* GENERAL_REGS */ \
- 0x80, /* SP_REG */ \
- 0xff, /* ALL_REGS */ \
- }
-
- /* The same information, inverted:
- Return the class number of the smallest class containing
- reg number REGNO. This could be a conditional expression
- or could index an array. */
-
- #define REGNO_REG_CLASS(REGNO) \
- ((REGNO) >= STACK_POINTER_REGNUM \
- ? ((REGNO) >= FRAME_POINTER_REGNUM \
- ? SP_REG \
- : GENERAL_REGS) \
- : LONG_REGS)
-
- /* The class value for index registers, and the one for base regs. */
-
- #define INDEX_REG_CLASS NO_REGS
- #define BASE_REG_CLASS GENERAL_REGS
-
- /* Get reg_class from a letter such as appears in the machine description. */
-
- #define REG_CLASS_FROM_LETTER(C) \
- ((C) == 'a' ? SP_REG : (((C) == 'l') ? LONG_REGS : NO_REGS))
-
- /* The letters I, J, K, L, M, N, O, P in a register constraint string
- can be used to stand for particular ranges of immediate operands.
- This macro defines what the ranges are.
- C is the letter, and VALUE is a constant value.
- Return 1 if VALUE is in the range specified by C. */
-
- #define CONST_OK_FOR_LETTER_P(VALUE, C) \
- ((C) == 'I' ? (VALUE) == 0 : \
- (C) == 'J' ? (((VALUE) & 0xff00) == 0) : \
- (C) == 'K' ? ((VALUE) == 1 || (VALUE) == 2) : \
- (C) == 'L' ? ((VALUE) == -1 || (VALUE) == -2) : \
- (C) == 'M' ? ((VALUE) == 3 || (VALUE) == 4) : \
- (C) == 'N' ? ((VALUE) == -3 || (VALUE) == -4) : \
- (C) == 'O' ? (potg8 (VALUE)) : \
- (C) == 'P' ? (potl8 (VALUE)) : \
- 0)
-
- /* Similar, but for floating constants, and defining letters G and H.
- Here VALUE is the CONST_DOUBLE rtx itself.
-
- `G' is a floating-point zero. */
-
- #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
- ((C) == 'G' ? ((VALUE) == CONST0_RTX (DFmode) \
- || (VALUE) == CONST0_RTX (DFmode)) \
- : 0)
-
- /* Extra constraints - 'U' if for an operand valid for a bset
- destination; i.e. a register or register indirect target. */
- #define EXTRA_CONSTRAINT(OP, C) \
- (((C) == 'U') \
- ? ((GET_CODE (OP) == REG) \
- || ((GET_CODE (OP) == MEM) \
- && GET_CODE (XEXP (OP, 0)) == REG)) \
- : 0)
-
- /* Given an rtx X being reloaded into a reg required to be
- in class CLASS, return the class of reg to actually use.
- In general this is just CLASS; but on some machines
- in some cases it is preferable to use a more restrictive class. */
- #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
-
- /* Return the maximum number of consecutive registers
- needed to represent mode MODE in a register of class CLASS. */
-
- /* On the H8, this is the size of MODE in words,
- except in the FP regs, where a single reg is always enough. */
- #define CLASS_MAX_NREGS(CLASS, MODE) \
- ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
-
- /* Any SI register to register move may need to be reloaded,
- so define REGISTER_MOVE_COST to be > 2 so that reload never
- shortcuts. */
- #define REGISTER_MOVE_COST(CLASS1, CLASS2) 3
-
- /* Stack layout; function entry, exit and calling. */
-
- /* Define this if pushing a word on the stack
- makes the stack pointer a smaller address. */
- #define STACK_GROWS_DOWNWARD
-
- /* Define this if the nominal address of the stack frame
- is at the high-address end of the local variables;
- that is, each additional local variable allocated
- goes at a more negative offset in the frame. */
- #define FRAME_GROWS_DOWNWARD
-
- /* Offset within stack frame to start allocating local variables at.
- If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
- first local allocated. Otherwise, it is the offset to the BEGINNING
- of the first local allocated. */
- #define STARTING_FRAME_OFFSET 0
-
- /* If we generate an insn to push BYTES bytes,
- this says how many the stack pointer really advances by.
-
- On the H8/300, @-sp really pushes a byte if you ask it to - but that's
- dangerous, so we claim that it always pushes a word, then we catch
- the mov.b rx,@-sp and turn it into a mov.w rx,@-sp on output. */
- #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
-
- /* Offset of first parameter from the argument pointer register value. */
-
- /* Is equal to the size of the saved fp + pc, even if an fp isn't
- saved since the value is used before we know. */
- #define FIRST_PARM_OFFSET(FNDECL) 0
-
- /* Value is the number of bytes of arguments automatically
- popped when returning from a subroutine call.
- FUNTYPE is the data type of the function (as a tree),
- or for a library call it is an identifier node for the subroutine name.
- SIZE is the number of bytes of arguments passed on the stack.
-
- On the H8/300 the return does not pop anything. */
- #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
-
- /* Definitions for register eliminations.
-
- This is an array of structures. Each structure initializes one pair
- of eliminable registers. The "from" register number is given first,
- followed by "to". Eliminations of the same "from" register are listed
- in order of preference.
-
- We have two registers that can be eliminated on the i386. First, the
- frame pointer register can often be eliminated in favor of the stack
- pointer register. Secondly, the argument pointer register can always be
- eliminated; it is replaced with either the stack or frame pointer. */
- #define ELIMINABLE_REGS \
- {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
- { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
- { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
-
- #define CAN_ELIMINATE(FROM, TO) \
- ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
- ? ! frame_pointer_needed \
- : 1)
-
- /* Define the offset between two registers, one to be eliminated, and the other
- its replacement, at the start of a routine. */
- #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) OFFSET = io (FROM,TO)
-
- /* Define how to find the value returned by a function.
- VALTYPE is the data type of the value (as a tree).
- If the precise function being called is known, FUNC is its FUNCTION_DECL;
- otherwise, FUNC is 0.
-
- On the H8/300 the return value is in R0/R1. */
- #define FUNCTION_VALUE(VALTYPE, FUNC) \
- gen_rtx (REG, TYPE_MODE (VALTYPE), 0)
-
- /* Define how to find the value returned by a library function
- assuming the value has mode MODE. */
-
- /* On the H8/300 the return value is in R0/R1. */
- #define LIBCALL_VALUE(MODE) \
- gen_rtx (REG, MODE, 0)
-
- /* 1 if N is a possible register number for a function value.
- On the H8/300, R0 is the only register thus used. */
- #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
-
- /* Define this if PCC uses the nonreentrant convention for returning
- structure and union values. */
- #define PCC_STATIC_STRUCT_RETURN
-
- /* 1 if N is a possible register number for function argument passing.
- On the H8/300, no registers are used in this way. */
- #define FUNCTION_ARG_REGNO_P(N) 0
-
- /* Register in which address to store a structure value
- is passed to a function. */
- #define STRUCT_VALUE 0
- #define STRUCT_VALUE_REGNUM 0
- #define STRUCT_VALUE_INCOMING 0
-
- /* Return true if X should be returned in memory. */
- #define RETURN_IN_MEMORY(X) \
- (TYPE_MODE (X) == BLKmode || GET_MODE_SIZE (TYPE_MODE (X)) > 4)
-
- /* Don't default to pcc-struct-return, because we have already specified
- exactly how to return structures in the RETURN_IN_MEMORY macro. */
- #define DEFAULT_PCC_STRUCT_RETURN 0
-
- /* When defined, the compiler allows registers explicitly used in the
- rtl to be used as spill registers but prevents the compiler from
- extending the lifetime of these registers. */
- #define SMALL_REGISTER_CLASSES
-
- /* Define a data type for recording info about an argument list
- during the scan of that argument list. This data type should
- Hold all necessary information about the function itself
- and about the args processed so far, enough to enable macros
- such as FUNCTION_ARG to determine where the next arg should go.
-
- On the H8/300, this is a two item struct, the first is the number of bytes
- scanned so far, the second the name of any libcall. */
-
- #define CUMULATIVE_ARGS struct cum_arg
- struct cum_arg { int nbytes; struct rtx_def* libcall; };
-
- /* Initialize a variable CUM of type CUMULATIVE_ARGS
- for a call to a function whose data type is FNTYPE.
- For a library call, FNTYPE is 0.
-
- On the H8/300, the offset starts at 0. */
- #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \
- ((CUM).nbytes = 0, (CUM).libcall = LIBNAME)
-
- /* Update the data in CUM to advance over an argument
- of mode MODE and data type TYPE.
-
- All sizes rounded up to even bytes. */
-
- #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
- ((CUM).nbytes += ((MODE) != BLKmode \
- ? (GET_MODE_SIZE (MODE) + 1) & ~1 \
- : (int_size_in_bytes (TYPE) + 1) & ~1))
-
- /* Define where to put the arguments to a function.
- Value is zero to push the argument on the stack,
- or a hard register in which to store the argument.
-
- MODE is the argument's machine mode.
- TYPE is the data type of the argument (as a tree).
- This is null for libcalls where that information may
- not be available.
- CUM is a variable of type CUMULATIVE_ARGS which gives info about
- the preceding args and about the function being called.
- NAMED is nonzero if this argument is a named parameter
- (otherwise it is an extra parameter matching an ellipsis). */
-
- /* On the H8/300 all normal args are pushed, we pass args to named
- functions in registers. */
-
- extern struct rtx_def *function_arg();
- #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
- function_arg (&CUM, MODE, TYPE, NAMED)
-
- /* This macro generates the assembly code for function entry.
- FILE is a stdio stream to output the code to.
- SIZE is an int: how many units of temporary storage to allocate.
- Refer to the array `regs_ever_live' to determine which registers
- to save; `regs_ever_live[I]' is nonzero if register number I
- is ever used in the function. This macro is responsible for
- knowing which registers should not be saved even if used. */
-
- #define FUNCTION_PROLOGUE(FILE, SIZE) \
- function_prologue (FILE, SIZE)
-
- /* Output assembler code to FILE to increment profiler label # LABELNO
- for profiling a function entry. */
-
- #define FUNCTION_PROFILER(FILE, LABELNO) \
- fprintf (FILE, "\t; not implemented\n", (LABELNO));
-
- /* Output assembler code to FILE to initialize this source file's
- basic block profiling info, if that has not already been done. */
-
- #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
- fprintf (FILE, "\t; not implemented \n", LABELNO, LABELNO);
-
- /* Output assembler code to FILE to increment the entry-count for
- the BLOCKNO'th basic block in this source file. */
-
- #define BLOCK_PROFILER(FILE, BLOCKNO) \
- fprintf (FILE, "\t; not implemented\n");
-
- /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
- the stack pointer does not matter. The value is tested only in
- functions that have frame pointers.
- No definition is equivalent to always zero. */
-
- #define EXIT_IGNORE_STACK 0
-
- /* This macro generates the assembly code for function exit,
- on machines that need it. If FUNCTION_EPILOGUE is not defined
- then individual return instructions are generated for each
- return statement. Args are same as for FUNCTION_PROLOGUE. */
-
- #define FUNCTION_EPILOGUE(FILE, SIZE) \
- function_epilogue (FILE, SIZE)
-
- /* Output assembler code for a block containing the constant parts
- of a trampoline, leaving space for the variable parts. */
-
- #define TRAMPOLINE_TEMPLATE(FILE) \
- fprintf (FILE, " trampolines not implemented\n");
-
- /* Length in units of the trampoline for entering a nested function. */
-
- #define TRAMPOLINE_SIZE 15
-
- /* Emit RTL insns to initialize the variable parts of a trampoline.
- FNADDR is an RTX for the address of the function's pure code.
- CXT is an RTX for the static chain value for the function. */
-
- /* We copy the register-mask from the function's pure code
- to the start of the trampoline. */
- #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
- { \
- emit_move_insn (gen_rtx (MEM, HImode, TRAMP), \
- gen_rtx (MEM, HImode, FNADDR)); \
- emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)), CXT);\
- emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 11)), \
- plus_constant (FNADDR, 2)); \
- }
-
- /* Addressing modes, and classification of registers for them.
- Although the H8/300 has pre decrement destinations and post
- increment sources on moves, they are not general enough to be much
- use to gcc */
-
- /*#define HAVE_POST_INCREMENT*/
- /*#define HAVE_POST_DECREMENT */
-
- /*#define HAVE_PRE_DECREMENT*/
- /*#define HAVE_PRE_INCREMENT */
-
- /* Macros to check register numbers against specific register classes. */
-
- /* These assume that REGNO is a hard or pseudo reg number.
- They give nonzero only if REGNO is a hard reg of the suitable class
- or a pseudo reg currently allocated to a suitable hard reg.
- Since they use reg_renumber, they are safe only once reg_renumber
- has been allocated, which happens in local-alloc.c. */
-
- #define REGNO_OK_FOR_INDEX_P(regno) 0
-
- #define REGNO_OK_FOR_BASE_P(regno) \
- ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
-
- /* Maximum number of registers that can appear in a valid memory address. */
-
- #define MAX_REGS_PER_ADDRESS 1
-
- /* 1 if X is an rtx for a constant that is a valid address. */
-
- #define CONSTANT_ADDRESS_P(X) \
- (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
- || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
- || GET_CODE (X) == HIGH)
-
- /* Nonzero if the constant value X is a legitimate general operand.
- It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
-
- #define LEGITIMATE_CONSTANT_P(X) (GET_CODE (X) != CONST_DOUBLE)
-
- /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
- and check its validity for a certain class.
- We have two alternate definitions for each of them.
- The usual definition accepts all pseudo regs; the other rejects
- them unless they have been allocated suitable hard regs.
- The symbol REG_OK_STRICT causes the latter definition to be used.
-
- Most source files want to accept pseudo regs in the hope that
- they will get allocated to the class that the insn wants them to be in.
- Source files for reload pass need to be strict.
- After reload, it makes no difference, since pseudo regs have
- been eliminated by then. */
-
- #ifndef REG_OK_STRICT
-
- /* Nonzero if X is a hard reg that can be used as an index
- or if it is a pseudo reg. */
- #define REG_OK_FOR_INDEX_P(X) 0
- /* Nonzero if X is a hard reg that can be used as a base reg
- or if it is a pseudo reg. */
- #define REG_OK_FOR_BASE_P(X) 1
-
- #define REG_OK_FOR_INDEX_P_STRICT(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
- #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
-
- #else
-
- /* Nonzero if X is a hard reg that can be used as an index. */
- #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
- /* Nonzero if X is a hard reg that can be used as a base reg. */
- #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
-
- #endif
-
- /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
- that is a valid memory address for an instruction.
- The MODE argument is the machine mode for the MEM expression
- that wants to use this address.
-
- The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
- except for CONSTANT_ADDRESS_P which is actually
- machine-independent.
-
-
- On the H8/300, a legitimate address has the form
- REG, REG+CONSTANT_ADDRESS or CONSTANT_ADDRESS. */
-
- /* Accept either REG or SUBREG where a register is valid. */
-
- #define RTX_OK_FOR_BASE_P(X) \
- ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
- || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
- && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
-
- #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
- if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
- if (CONSTANT_ADDRESS_P (X)) goto ADDR; \
- if (GET_CODE (X) == PLUS \
- && CONSTANT_ADDRESS_P (XEXP (X, 1)) \
- && RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR;
-
- /* Try machine-dependent ways of modifying an illegitimate address
- to be legitimate. If we find one, return the new, valid address.
- This macro is used in only one place: `memory_address' in explow.c.
-
- OLDX is the address as it was before break_out_memory_refs was called.
- In some cases it is useful to look at this to decide what needs to be done.
-
- MODE and WIN are passed so that this macro can use
- GO_IF_LEGITIMATE_ADDRESS.
-
- It is always safe for this macro to do nothing. It exists to recognize
- opportunities to optimize the output.
-
- For the H8/300, don't do anything. */
-
- #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
-
- /* Go to LABEL if ADDR (a legitimate address expression)
- has an effect that depends on the machine mode it is used for.
-
- On the H8/300, the predecrement and postincrement address depend thus
- (the amount of decrement or increment being the length of the operand)
- and all indexed address depend thus (because the index scale factor
- is the length of the operand). */
-
- #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
- if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL;
-
- /* Specify the machine mode that this machine uses
- for the index in the tablejump instruction. */
- #define CASE_VECTOR_MODE HImode
-
- /* Define this if the case instruction expects the table
- to contain offsets from the address of the table.
- Do not define this if the table should contain absolute addresses. */
- /*#define CASE_VECTOR_PC_RELATIVE*/
-
- /* Define this if the case instruction drops through after the table
- when the index is out of range. Don't define it if the case insn
- jumps to the default label instead. */
- #define CASE_DROPS_THROUGH
-
- /* Specify the tree operation to be used to convert reals to integers. */
- #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
-
- /* This is the kind of divide that is easiest to do in the general case. */
- #define EASY_DIV_EXPR TRUNC_DIV_EXPR
-
- /* Define this as 1 if `char' should by default be signed; else as 0.
-
- On the H8/300, sign extension is expensive, so we'll say that chars
- are unsigned. */
- #define DEFAULT_SIGNED_CHAR 0
-
- /* This flag, if defined, says the same insns that convert to a signed fixnum
- also convert validly to an unsigned one. */
- #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
-
- /* Max number of bytes we can move from memory to memory
- in one reasonably fast instruction. */
- #define MOVE_MAX 2
-
- /* Define this if zero-extension is slow (more than one real instruction). */
- /* #define SLOW_ZERO_EXTEND */
-
- /* Nonzero if access to memory by bytes is slow and undesirable. */
- #define SLOW_BYTE_ACCESS TARGET_SLOWBYTE
-
- /* Define if shifts truncate the shift count
- which implies one can omit a sign-extension or zero-extension
- of a shift count. */
- /* #define SHIFT_COUNT_TRUNCATED */
-
- /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
- is done just by pretending it is already truncated. */
- #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
-
- /* Specify the machine mode that pointers have.
- After generation of rtl, the compiler makes no further distinction
- between pointers and any other objects of this machine mode. */
- #define Pmode HImode
-
- #define SIZE_TYPE "unsigned int"
- #define PTRDIFF_TYPE "int"
-
- /* A function address in a call instruction
- is a byte address (for indexing purposes)
- so give the MEM rtx a byte's mode. */
- #define FUNCTION_MODE QImode
-
- /* Compute the cost of computing a constant rtl expression RTX
- whose rtx-code is CODE. The body of this macro is a portion
- of a switch statement. If the code is computed here,
- return it with a return statement. Otherwise, break from the switch. */
-
- #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
- case CONST_INT: \
- switch (INTVAL (RTX)) \
- { \
- case 0: \
- case 1: \
- case 2: \
- case -1: \
- case -2: \
- return 0; \
- default: \
- return 1; \
- } \
- case CONST: \
- case LABEL_REF: \
- case SYMBOL_REF: \
- return 3; \
- case CONST_DOUBLE: \
- return 20;
-
- #define BRANCH_COST 2
-
- /* Provide the costs of a rtl expression. This is in the body of a
- switch on CODE. */
-
- #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
- case MOD: \
- case DIV: \
- return 60; \
- case MULT: \
- return 20; \
- case LSHIFT: \
- case ASHIFT: \
- case ASHIFTRT: \
- case LSHIFTRT: \
- case ROTATE: \
- case ROTATERT: \
- if (GET_MODE (RTX) == HImode) \
- return 2; \
- return 10; \
-
- /* Tell final.c how to eliminate redundant test instructions. */
-
- /* Store in cc_status the expressions that the condition codes will describe
- after execution of an instruction whose pattern is EXP. Do not
- alter them if the instruction would not alter the cc's. */
-
- #define NOTICE_UPDATE_CC(EXP, INSN) \
- switch (get_attr_cc (INSN)) \
- { \
- case CC_NONE: \
- /* Insn does not affect the CC at all. */ \
- break; \
- case CC_NONE_0HIT: \
- /* Insn does not change the CC, but the 0'th operand has been \
- changed. */ \
- if (cc_status.value1 != 0 \
- && reg_overlap_mentioned_p (recog_operand[0], cc_status.value1))\
- cc_status.value1 = 0; \
- \
- if (cc_status.value2 != 0 \
- && reg_overlap_mentioned_p (recog_operand[0], cc_status.value2))\
- cc_status.value2 = 0; \
- break; \
- case CC_SET: \
- /* Insn sets CC to recog_operand[0], but overflow is impossible. */\
- CC_STATUS_INIT; \
- cc_status.flags |= CC_NO_OVERFLOW; \
- cc_status.value1 = recog_operand[0]; \
- break; \
- case CC_COMPARE: \
- /* The insn is a compare instruction. */ \
- CC_STATUS_INIT; \
- cc_status.value1 = recog_operand[0]; \
- cc_status.value1 = recog_operand[1]; \
- break; \
- case CC_WHOOPS: \
- case CC_CLOBBER: \
- /* Insn clobbers CC. */ \
- CC_STATUS_INIT; \
- break; \
- } \
-
- #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \
- { \
- if (cc_status.flags & CC_NO_OVERFLOW) \
- return NO_OV; \
- return NORMAL; \
- }
-
- /* Control the assembler format that we output. */
-
- #define ASM_IDENTIFY_GCC /* nothing */
-
- /* Output at beginning of assembler file. */
- #define ASM_FILE_START(FILE) \
- { \
- fprintf (FILE, ";\tGCC For the Hitachi H8/300\n"); \
- if (optimize) \
- fprintf (FILE, "; -O%d\n", optimize); \
- fprintf (FILE, "\n\n"); \
- output_file_directive (FILE, main_input_filename); \
- }
-
- #define ASM_FILE_END(FILE) \
- fprintf (FILE, "\t.end\n");
-
- /* Output to assembler file text saying following lines
- may contain character constants, extra white space, comments, etc. */
-
- #define ASM_APP_ON "; #APP\n"
-
- /* Output to assembler file text saying following lines
- no longer contain unusual constructs. */
-
- #define ASM_APP_OFF "; #NO_APP\n"
-
- #define FILE_ASM_OP "\t.file\n"
- #define IDENT_ASM_OP "\t.ident\n"
-
- /* Output before read-only data. */
-
- #define TEXT_SECTION_ASM_OP "\t.section .text"
- #define DATA_SECTION_ASM_OP "\t.section .data"
- #define BSS_SECTION_ASM_OP "\t.section .bss"
-
- #define EXTRA_SECTIONS in_user
-
- #define EXTRA_SECTION_FUNCTIONS \
- void \
- user_section (name) \
- char *name; \
- { \
- fprintf (asm_out_file, "\t.section\t%s\n", name); \
- in_section = in_user; \
- }
-
- #define MAX_TEXT_ALIGN 16
-
- /* How to refer to registers in assembler output.
- This sequence is indexed by compiler's hard-register-number (see above). */
-
- #define REGISTER_NAMES \
- { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ap"}
-
- /* How to renumber registers for dbx and gdb.
- H8/300 needs no change in the numeration. */
-
- #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
-
- /* This is how to output the definition of a user-level label named NAME,
- such as the label on a static function or variable NAME. */
- #define SDB_DEBUGGING_INFO
- #define SDB_DELIM "\n"
-
- #define ASM_OUTPUT_LABEL(FILE,NAME) \
- do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
-
- /*#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) */
-
- /* This is how to output a command to make the user-level label named NAME
- defined for reference from other files. */
- #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
- do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
-
- /*#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
- ASM_OUTPUT_LABEL(FILE, NAME); */
-
- /* This is how to output a reference to a user-level label named NAME. */
- #define ASM_OUTPUT_LABELREF(FILE, NAME) \
- asm_output_labelref (FILE, NAME)
-
- /* This is how to output an internal numbered label where
- PREFIX is the class of label and NUM is the number within the class. */
-
- #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
- fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
-
- /* This is how to store into the string LABEL
- the symbol_ref name of an internal numbered label where
- PREFIX is the class of label and NUM is the number within the class.
- This is suitable for output with `assemble_name'. */
-
- #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
- sprintf (LABEL, "*.%s%d", PREFIX, NUM)
-
- /* This is how to output an assembler line defining a `double' constant.
- It is .dfloat or .gfloat, depending. */
-
- /*#define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
- fprintf (FILE, "\t.double %.20e\n", (VALUE))*/
-
- /* This is how to output an assembler line defining a `float' constant. */
- #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
- fprintf (FILE, "\t.float %.20e\n", \
- ((VALUE) > 1e30 ? 1e30 \
- : ((VALUE) < -1e30) ? -1e30 : (double) ((float) VALUE)));
-
- /* This is how to output an assembler line defining an `int' constant. */
- #define ASM_OUTPUT_INT(FILE, VALUE) \
- ( fprintf (FILE, "\t.long "), \
- output_addr_const (FILE, (VALUE)), \
- fprintf (FILE, "\n"))
-
- /* Likewise for `char' and `short' constants. */
- #define ASM_OUTPUT_CHAR(FILE, VALUE) \
- ( fprintf (FILE, "\t.byte "), \
- output_addr_const (FILE, (VALUE)), \
- fprintf (FILE, "\n"))
-
- #define ASM_OUTPUT_SHORT(FILE, VALUE) \
- ( fprintf (FILE, "\t.word "), \
- output_addr_const (FILE, (VALUE)), \
- fprintf (FILE, "\n"))
-
- /* This is how to output an assembler line for a numeric constant byte. */
- #define ASM_OUTPUT_BYTE(FILE, VALUE) \
- fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
-
- /* This is how to output an insn to push a register on the stack.
- It need not be very fast code. */
- #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
- fprintf (FILE, "\tpush %s\n", reg_names[REGNO])
-
- /* This is how to output an insn to pop a register from the stack.
- It need not be very fast code. */
- #define ASM_OUTPUT_REG_POP(FILE, REGNO) \
- fprintf (FILE, "\tpop\t%s\n", reg_names[REGNO])
-
- /* This is how to output an element of a case-vector that is absolute. */
- #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
- asm_fprintf (FILE, "\t.word .L%d\n", VALUE)
-
- /* This is how to output an element of a case-vector that is relative. */
- #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
- fprintf (FILE, "\t.word.w .L%d-.L%d\n", VALUE, REL)
-
- /* This is how to output an assembler line
- that says to advance the location counter
- to a multiple of 2**LOG bytes. */
- #define ASM_OUTPUT_ALIGN(FILE, LOG) \
- if ((LOG) != 0) \
- fprintf (FILE, "\t.align %d\n", 1 << (LOG))
-
- /* This is how to output an assembler line
- that says to advance the location counter by SIZE bytes. */
- #define ASM_OUTPUT_IDENT(FILE, NAME) \
- fprintf (FILE, "%s\t \"%s\"\n", IDENT_ASM_OP, NAME)
-
- #define ASM_OUTPUT_SKIP(FILE, SIZE) \
- fprintf (FILE, "\t.space %d\n", (SIZE))
-
- /* This says how to output an assembler line
- to define a global common symbol. */
- #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
- ( fputs ("\t.comm ", (FILE)), \
- assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), ",%d\n", (SIZE)))
-
- /* This says how to output an assembler line
- to define a local common symbol. */
- #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
- ( fputs ("\t.lcomm ", (FILE)), \
- assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), ",%d\n", (SIZE)))
-
- /* Store in OUTPUT a string (made with alloca) containing
- an assembler-name for a local static variable named NAME.
- LABELNO is an integer which is different for each call. */
-
- #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
- ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
- sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
-
- /* Define the parentheses used to group arithmetic operations
- in assembler code. */
-
- #define ASM_OPEN_PAREN "("
- #define ASM_CLOSE_PAREN ")"
-
- /* Define results of standard character escape sequences. */
- #define TARGET_BELL 007
- #define TARGET_BS 010
- #define TARGET_TAB 011
- #define TARGET_NEWLINE 012
- #define TARGET_VT 013
- #define TARGET_FF 014
- #define TARGET_CR 015
-
- #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
- ((CODE) == '#')
-
- #define PRINT_OPERAND(FILE, X, CODE) \
- print_operand (FILE, X, CODE)
-
- /* Print a memory operand whose address is X, on file FILE.
- This uses a function in h8300.c. */
-
- #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
- print_operand_address (FILE, ADDR)
-
- #define HANDLE_PRAGMA(FILE) handle_pragma (FILE)
-
- #define FINAL_PRESCAN_INSN(insn, operand, nop) \
- final_prescan_insn (insn, operand, nop)
-
- /* Define this macro if GNU CC should generate calls to the System V
- (and ANSI C) library functions `memcpy' and `memset' rather than
- the BSD functions `bcopy' and `bzero'. */
- #define TARGET_MEM_FUNCTIONS 1
-
- /* Define subroutines to call to handle various operations not
- supported in the hardware */
-
- #define DIVHI3_LIBCALL "__divhi3"
- #define UDIVHI3_LIBCALL "__udivhi3"
- #define MULHI3_LIBCALL "__mulhi3"
- #define MODHI3_LIBCALL "__modhi3"
- #define UMODHI3_LIBCALL "__umodhi3"
- #define ADDSI3_LIBCALL "__addsi3"
- #define SUBSI3_LIBCALL "__subsi3"
-
- #define MOVE_RATIO 3
-
- #if 0
- /* This stuff doesn't work currently. */
- #undef SELECT_SECTION
- #define SELECT_SECTION(DECL,RELOC) select_section(DECL, RELOC)
- #define SELECT_FUNCTION_SECTION(a,b) SELECT_SECTION(a,b)
- #endif
-