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- /* Definitions of target machine for GNU compiler, for the Motorola dsp56000
- digital signal processing chip.
- Copyright (C) 1988 Free Software Foundation, Inc.
-
- $Header: /usr1/dsp/cvsroot/source/gcc/config/tm-dsp56k.h,v 1.27 92/04/02 10:41:54 pete Exp $
- $Id: tm-dsp56k.h,v 1.27 92/04/02 10:41:54 pete Exp $
-
- This file is part of GNU CC.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY. No author or distributor
- accepts responsibility to anyone for the consequences of using it
- or for whether it serves any particular purpose or works at all,
- unless he says so in writing. Refer to the GNU CC General Public
- License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- GNU CC, but only under the conditions described in the
- GNU CC General Public License. A copy of this license is
- supposed to have been given to you along with GNU CC so you
- can know your rights and responsibilities. It should be in a
- file named COPYING. Among other things, the copyright notice
- and this notice must be preserved on all copies. */
-
-
- /* Note that some other tm- files include this one and then override
- many of the definitions that relate to assembler syntax. */
-
- #define DSP56000 1
-
- /* Turn on debugging output */
-
- #define SDB_DEBUGGING_INFO
-
- /* Names to predefine in the preprocessor for this target machine. */
-
- #define CPP_PREDEFINES "-DDSP56K"
-
- /* Print subsidiary information on the compiler version in use. */
- #define TARGET_VERSION fprintf (stderr, " Motorola DSP56000/1 %s", \
- motorola_version_string);
-
- /* Run-time compilation parameters selecting different hardware subsets. */
- /* Not used on dsp56k */
-
- extern int target_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 DSP_ALL_OPTS 483
- #define TARGET_DSP ( target_flags & DSP_ALL_OPTS )
- #define TARGET_LINV_PLUS_BIV_PROMOTION ( target_flags & 1 )
- #define TARGET_DO_LOOP_GENERATION ( target_flags & 2 )
- #define TARGET_X_MEMORY ( target_flags & 4 )
- #define TARGET_Y_MEMORY ( target_flags & 8 )
- #define TARGET_L_MEMORY ( target_flags & 16 )
- #define TARGET_CALL_OVERHEAD_REDUCTION ( target_flags & 32 )
- #define TARGET_REP ( target_flags & 64 )
- #define TARGET_RELOAD_CLEANUP ( target_flags & 128 )
- #define TARGET_NORMALIZATION_REDUCTION ( target_flags & 256 )
- #define TARGET_STACK_CHECK ( target_flags & 4096 )
- #define TARGET_SWITCHES \
- {{ "dsp", DSP_ALL_OPTS }, \
- { "no-dsp", -DSP_ALL_OPTS }, \
- { "linv-plus-biv-promotion", 1 }, \
- { "no-linv-plus-biv-promotion", -1 }, \
- { "do-loop-generation", 2 }, \
- { "no-do-loop-generation", -2 }, \
- { "x-memory", 4 }, \
- { "y-memory", 8 }, \
- { "l-memory", 16 }, \
- { "call-overhead-reduction", 32 }, \
- { "no-call-overhead-reduction", -32 }, \
- { "rep", 64 }, \
- { "no-rep", -64 }, \
- { "reload-cleanup", 128 }, \
- { "no-reload-cleanup", -128 }, \
- { "normalization-reduction", 256 }, \
- { "no-normalization-reduction", -256 }, \
- { "stack-check", 4096 }, \
- { "no-stack-check", 4096 }, \
- { "", TARGET_DEFAULT}}
-
- #define TARGET_DEFAULT ( 8 + DSP_ALL_OPTS )
-
- /* target machine storage layout */
-
- /* Define this if most significant bit is lowest numbered
- in instructions that operate on numbered bit-fields. */
- /* m96k is numbered 31..0 */
- #undef BITS_BIG_ENDIAN
-
- /* Define this if most significant byte of a word is the lowest numbered. */
- /* has no byte address but if it did they would look like 3..2..1..0 */
- #undef BYTES_BIG_ENDIAN
-
- /* Define this if most significant word of a multiword object has the lowest
- is number. */
- /* m56k has multiword objects: 48 bit longs. */
- #undef WORDS_BIG_ENDIAN
-
- /* number of bits in an addressible storage unit. m56k has word addressing */
- #define BITS_PER_UNIT 24
- #define CHAR_TYPE_SIZE 24
- #define SHORT_TYPE_SIZE 24
- #define LONG_TYPE_SIZE 48
- #define LONG_LONG_TYPE_SIZE LONG_TYPE_SIZE
- #define FLOAT_TYPE_SIZE (( 'l' == memory_model ) ? 24 : 48 )
- #define DOUBLE_TYPE_SIZE FLOAT_TYPE_SIZE
- #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
-
- /* the maximum nesting depth of do-loops allowed. */
- #define MAX_DO_LOOP_NESTING 3
-
- /* 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 24
-
- /* Width of a word, in units (bytes). */
- /* m56k has word addressing */
- #define UNITS_PER_WORD 1
-
- /* Width in bits of a pointer.
- See also the macro `Pmode' defined below. */
- #define POINTER_SIZE 16
-
- /* Allocation boundary (in *bits*) for storing pointers in memory. */
- #define POINTER_BOUNDARY 24
-
- /* Allocation boundary (in *bits*) for storing arguments in argument list. */
- #define PARM_BOUNDARY 24
-
- /* Allocation boundary (in *bits*) for the code of a function. */
- #define FUNCTION_BOUNDARY 24
-
- /* Alignment of field after `int : 0' in a structure. */
- #define EMPTY_FIELD_BOUNDARY 24
-
- /* No data type wants to be aligned rounder than this. */
- #define BIGGEST_ALIGNMENT 24
-
- /* Define this if move instructions will actually fail to work
- when given unaligned data. */
- /* m56k cannot have unaligned data */
- #define STRICT_ALIGNMENT
-
- /* 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.
-
- for the 56k, we have X1,X0,Y1,Y0,A,B and R0-r7. N0-N7 remain unknown
- to the compiler so that the addressing mode of Rx+const so loved
- by gcc can be fixed up into Rx+Nx.
- */
- #define FIRST_PSEUDO_REGISTER 14
-
- /* 1 for registers that have pervasive standard uses
- and are not available for the register allocator.
-
- for the m56k:
-
- 0..5 = (a, b, x0, x1, y0, y1)
- 6 = (r0) frame pointer.
- 7..11 = (r1, r2, r3, r4, r5)
- 12 = (r6) stack pointer.
- 13 = (r7)
- */
- #define DSP56_A_REGNUM 0
- #define DSP56_B_REGNUM 1
- #define DSP56_X0_REGNUM 2
- #define DSP56_X1_REGNUM 3
- #define DSP56_Y0_REGNUM 4
- #define DSP56_Y1_REGNUM 5
-
- #define FIXED_REGISTERS \
- {0, 0, 0, 0, 0, 0, \
- 1, 0, 0, 0, 0, 0, 1, 0}
-
- /* Like FIXED_REGISTERS but has a 1 for each register that is clobbered
- ( in general ) by function calls. This macro therefore identifies the
- registers that are not available for general allocation of values that
- live across function calls.
- If a register has 0 in CALL_USED_REGISTERS the compiler automatically
- saves it on function entry if the register is used within that function.
-
- 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. */
- /* with the 56k arguments will be returned in a. */
- #define CALL_USED_REGISTERS \
- {1, 0, 0, 0, 0, 0, \
- 1, 0, 0, 0, 0, 0, 1, 0}
-
- /* 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.
-
- m56k puts floats/doubles into 48 bit regs, longs into 48 bit regs. */
-
- #define HARD_REGNO_NREGS( REGNO, MODE ) \
- ((( DFmode == MODE || SFmode == MODE || DImode == MODE ) && \
- ( REGNO != DSP56_A_REGNUM ) && ( REGNO != DSP56_B_REGNUM )) ? 2 : 1 )
-
- /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */
-
- #define HARD_REGNO_MODE_OK( REGNO, MODE ) \
- hard_regno_mode_ok( REGNO, MODE )
-
- /* 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) \
- modes_tieable_p( MODE1, MODE2 )
-
- /* Specify the registers used for certain standard purposes.
- The values of these macros are register numbers. */
-
- /* m56k has a dedicated pc */
- #undef PC_REGNUM
-
- /* Register to use for pushing function arguments. */
- #define STACK_POINTER_REGNUM 12
-
- /* 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 1
-
- /* Base register for access to arguments of the function. */
- /* m56k uses the frame pointer (r6) to as the argument pointer */
- #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM
-
- /* Register in which static-chain is passed to a function. */
- /* This is currently not used but this may change for pascal or ada or ... */
- #define STATIC_CHAIN_REGNUM DSP56_A_REGNUM
-
- /* Register in which address to store a structure value
- is passed to a function. */
- #define STRUCT_VALUE_REGNUM DSP56_A_REGNUM
-
-
- /* 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. */
-
- enum reg_class
- {
- NO_REGS,
- DST_REGS, /* All-mode destination registers: a, b */
- ADDR_REGS, /* PSImode registers: r0-r7 */
- MPY_REGS, /* source regs valid for mpy/mac multiplier x0,y0. */
- SRC_REGS, /* All-mode source registers: x1, x0, y1, y0 */
- ALL_REGS,
- LIM_REG_CLASSES
- };
-
- #define N_REG_CLASSES (int) LIM_REG_CLASSES
-
- /* Since GENERAL_REGS is the same class as NO_REGS,
- don't give it a different class number; just make it an alias. */
-
- #define GENERAL_REGS NO_REGS
-
- /* Give names of register classes as strings for dump file. */
-
- #define REG_CLASS_NAMES { \
- "NO_REGS", "DST_REGS", "ADDR_REGS",\
- "MPY_REGS","SRC_REGS", "ALL_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 { \
- 000000000000, /* NO_REGS */ \
- 000000000003, /* DST_REGS */ \
- 000000037700, /* ADDR_REGS */ \
- 000000000024, /* MPY_REGS */ \
- 000000000074, /* SRC_REGS */ \
- 000000037777 /* 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_reg_class ( REGNO )
-
- #define IS_SRC_OR_MPY_P(REGNO) \
- ( SRC_REGS == REGNO_REG_CLASS( REGNO ) || \
- MPY_REGS == REGNO_REG_CLASS( REGNO ))
-
- /* The class value for index registers, and the one for base regs. */
- #define INDEX_REG_CLASS ADDR_REGS
- #define BASE_REG_CLASS ADDR_REGS
-
- /* Get reg_class from a letter such as appears in the machine description. */
-
- #define REG_CLASS_FROM_LETTER(C) \
- reg_class_from_letter( C )
-
- /* The letters I, J, K, L and M 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) \
- ( 'J' != ( C ) || ( ! ( 0xfffff000 & ( VALUE ))))
-
- /* Similar, but for floating constants, and defining letters G and H.
- Here VALUE is the CONST_DOUBLE rtx itself. */
-
- #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 1
-
- /* 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. */
-
- #define CLASS_MAX_NREGS(CLASS,MODE) \
- class_max_nregs ( CLASS, MODE )
-
- /* Stack layout; function entry, exit and calling. */
-
- #define PUSH_ARGS_REVERSED
-
- /* Define this if pushing a word on the stack
- makes the stack pointer a smaller address. */
- #undef 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. */
-
- #undef 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. */
- #define PUSH_ROUNDING(BYTES) ( BYTES )
-
- /* If BYTES is the size of arguments for a function call,
- return the size of the argument block (which is BYTES suitably rounded).
- Define this only on machines where the entire call block is allocated
- before the args are stored into it. */
-
- #undef ROUND_CALL_BLOCK_SIZE
-
- /* Offset of first parameter from the argument pointer register value. */
- #define FIRST_PARM_OFFSET(FNDECL) \
- local_first_parm_offset ( FNDECL )
-
- /* Value is 1 if returning from a function call automatically
- pops the arguments described by the number-of-args field in the 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. */
-
- #define RETURN_POPS_ARGS(FUNTYPE) 1
-
- /* 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. */
- #define LIBCALL_VALUE(MODE) (gen_rtx ( REG, MODE, DSP56_A_REGNUM ))
-
- #define FUNCTION_VALUE(VALTYPE, FUNC) LIBCALL_VALUE ( TYPE_MODE (VALTYPE) )
-
- /* Define how to find the value returned by a library function
- assuming the value has mode MODE. */
-
- /* 1 if N is a possible register number for a function value
- as seen by the caller.*/
-
- #define FUNCTION_VALUE_REGNO_P(N) ( DSP56_A_REGNUM == ( N ))
-
- /* 1 if N is a possible register number for function argument passing. */
-
- #define FUNCTION_ARG_REGNO_P(N) 0
-
- /* 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.
- */
- #define CUMULATIVE_ARGS int
-
- /* 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.
- */
- #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE) ((CUM) = 0)
-
- /* Update the data in CUM to advance over an argument
- of mode MODE and data type TYPE.
- (TYPE is null for libcalls where that information may not be available.) */
-
- #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) ((CUM) ++)
-
- /* Determine where to put an argument 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). */
-
- #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) 0
-
- /* Define where a function finds its arguments.
- This would be different from FUNCTION_ARG if we had register windows. */
-
- #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
- local_function_incoming_arg ( CUM, MODE, TYPE, NAMED )
-
- /* For an arg passed partly in registers and partly in memory,
- this is the number of registers used.
- For args passed entirely in registers or entirely in memory, zero. */
-
- #define FUNCTION_ARG_PADDING(A,B) none
- #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
- #undef FUNCTION_ARG_PARTIAL_NREGS
-
- /* 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_logue ( FILE, SIZE, 0 )
-
- /* Output assembler code to FILE to increment profiler label # LABELNO
- for profiling a function entry. */
-
- #define FUNCTION_PROFILER(FILE, LABELNO)
-
- /* 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.
-
- The function epilogue should not depend on the current stack pointer!
- It should use the frame pointer only. This is mandatory because
- of alloca; we also take advantage of it to omit stack adjustments
- before returning. */
-
- #define FUNCTION_EPILOGUE(FILE, SIZE) function_logue ( FILE, SIZE, 1 )
-
- /* If the memory address ADDR is relative to the frame pointer,
- correct it to be relative to the stack pointer instead.
- This is for when we don't use a frame pointer.
- ADDR should be a variable name. */
-
- #define FIX_FRAME_POINTER_ADDRESS(ADDR,DEPTH)
-
- /* Addressing modes, and classification of registers for them. */
-
- #define HAVE_POST_INCREMENT
- #define HAVE_POST_DECREMENT
-
- #undef HAVE_PRE_DECREMENT
- #undef 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_BASE_P(REGNO) \
- (( 5 < REGNO && 14 > REGNO ) || \
- ( 5 < reg_renumber[REGNO] && 14 > reg_renumber[REGNO]))
-
- #define REGNO_OK_FOR_INDEX_P(REGNO) \
- (( 5 < REGNO && 14 > REGNO ) || \
- ( 5 < reg_renumber[REGNO] && 14 > reg_renumber[REGNO]))
-
- /* Now macros that check whether X is a register and also,
- strictly, whether it is in a specified class. */
-
- /* Maximum number of registers that can appear in a valid memory address. */
-
- #define MAX_REGS_PER_ADDRESS 1
-
- /* Recognize any constant value that is a valid address. */
-
- #define CONSTANT_ADDRESS_P(X) CONSTANT_P(X)
-
- /* 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) (CONSTANT_P(X)||CONST_DOUBLE==GET_CODE(X))
-
- /* 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) \
- ( REG_P ( X ) && \
- (( REGNO ( X ) >= FIRST_PSEUDO_REGISTER ) || \
- ( REGNO ( X ) > 5 && REGNO ( X ) < 14 )))
- /*
- * 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) \
- ( REG_P ( X ) && \
- (( REGNO ( X ) >= FIRST_PSEUDO_REGISTER ) || \
- ( REGNO ( X ) > 5 && REGNO ( X ) < 14 )))
-
- #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.
- */
-
- #ifdef REG_OK_STRICT
- #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
- if ( go_if_legitimate_address ( MODE, X, 1 ) ) goto ADDR;
- #else
- #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
- if ( go_if_legitimate_address ( MODE, X, 0 ) ) goto ADDR;
- #endif
-
- /* 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. */
-
- #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. */
-
- #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
-
-
- /* Specify the machine mode that this machine uses
- for the index in the tablejump instruction. */
- #define CASE_VECTOR_MODE PSImode
-
- /* Define this if a raw index is all that is needed for a
- `tablejump' insn. */
- #undef CASE_TAKES_INDEX_RAW
-
- /* Define this if the tablejump instruction expects the table
- to contain offsets from the address of the table.
- Do not define this if the table should contain absolute addresses. */
- #undef CASE_VECTOR_PC_RELATIVE
-
- /* 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. */
- #define DEFAULT_SIGNED_CHAR 1
-
- /* Max number of bytes we can move from memory to memory
- in one reasonably fast instruction. */
- #define MOVE_MAX 1
-
- /* We can't use move by pieces due to l space problems. */
- #define MOVE_RATIO 0
- #define MOVE_RATIO_56 5
-
- /* Nonzero if access to memory by bytes is slow and undesirable. */
- #define SLOW_BYTE_ACCESS 1
-
- /* Do not break .stabs pseudos into continuations. */
- #define DBX_CONTIN_LENGTH 0
-
- /* 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) ( LONG_TYPE_SIZE != INPREC )
-
- /* We assume that the store-condition-codes instructions store 0 for false
- and some other value for true. This is the value stored for true. */
-
- #define STORE_FLAG_VALUE 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 PSImode
-
- /* 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 PSImode
-
- /* Define this if addresses of constant functions
- shouldn't be put through pseudo regs where they can be cse'd.
- Desirable on machines where ordinary constants are expensive
- but a CALL with constant address is cheap. */
- #undef NO_FUNCTION_CSE
-
- /* 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) \
- case CONST_INT: \
- case CONST: \
- case LABEL_REF: \
- case SYMBOL_REF: \
- case CONST_DOUBLE: \
- return 2;
-
- /* 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) notice_update_cc ( EXP, INSN )
-
- enum mdep_cc_info { CC_UNKNOWN, CC_UNSIGNED, CC_SIGNED };
- #define CC_STATUS_MDEP enum mdep_cc_info
- #define CC_STATUS_MDEP_INIT CC_UNKNOWN
-
-
- /* Control the assembler format that we output. */
-
- /* Output at beginning of assembler file. */
-
- #define ASM_FILE_START(FILE) asm_file_start ( FILE )
-
- #define ASM_FILE_END(FILE) asm_file_end ( FILE )
-
- /* Output to assembler file text saying following lines
- may contain character constants, extra white space, comments, etc. */
- extern char* asm_app_toggle ();
- #define ASM_APP_ON asm_app_toggle ()
-
- /* Output to assembler file text saying following lines
- no longer contain unusual constructs. */
-
- #define MAX_TEXT_ALIGN 1
-
- #define ASM_APP_OFF asm_app_toggle ()
-
- #define SELECT_RTX_SECTION(MODE,X)\
- {\
- data_section ( );\
- }
-
- #define SELECT_SECTION(DECL)\
- {\
- if ( FUNCTION_DECL == TREE_CODE ( DECL ))\
- {\
- text_section ( );\
- }\
- else\
- {\
- data_section ( );\
- }\
- }
-
-
- /* Output before read-only data. */
-
- char *text_section_asm_op ( );
- #define TEXT_SECTION_ASM_OP text_section_asm_op ( )
-
- /* Output before writable data. */
-
- char *data_section_asm_op ( );
- #define DATA_SECTION_ASM_OP data_section_asm_op ( )
-
- /* How to refer to registers in assembler output.
- This sequence is indexed by compiler's hard-register-number (see above). */
-
- #define REGISTER_NAMES \
- { "a", "b", "x0", "x1", "y0", "y1", \
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7" }
-
- /* How to renumber registers for dbx and gdb. */
-
- #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 ASM_IDENTIFY_GCC(FILE) fprintf ( FILE, ";*** DSP56000/1 %s GNU %s\n", motorola_version_string, version_string );
-
- #define ASM_OUTPUT_LABEL(FILE,NAME) \
- do { assemble_name (FILE, NAME); fputs ("\n", FILE); } while (0)
-
- /* 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) \
- ( fputs ("\tglobal\t", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE) )
-
- /* This is how to output a reference to a user-level label named NAME.
- `assemble_name' uses this. */
-
- #define ASM_OUTPUT_LABELREF(FILE,NAME) \
- fprintf (FILE, "F%s", 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. */
-
- void dtok ( );
-
- #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
- (dtok( FILE, VALUE ))
-
- /* This is how to output an assembler line defining a `float' constant. */
-
- #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
- (dtok( FILE, VALUE ))
-
- /* This is how to output an assembler line defining an `int' constant. */
-
- #define ASM_OUTPUT_DOUBLE_INT(FILE,VALUE) \
- (( 'l' == memory_model ) ? \
- (( CONST_INT == GET_CODE( VALUE )) ? \
- ( fprintf ( FILE, "\tdc\t$%06x%06x\n", \
- (( INTVAL ( VALUE ) >> 24 ) & 0x0000ff ), \
- ( INTVAL ( VALUE ) & 0xffffff ))) : \
- ( fprintf ( FILE, "\tdc\t$%06x%06x\n", \
- ((( CONST_DOUBLE_LOW ( VALUE ) >> 24 ) & 0x0000ff ) | \
- (( CONST_DOUBLE_HIGH ( VALUE ) << 8 ) & 0xffff00 )), \
- ( CONST_DOUBLE_LOW ( VALUE ) & 0xffffff )))) : \
- (( CONST_INT == GET_CODE( VALUE )) ? \
- ( fprintf ( FILE, "\tdc\t$%06x\n\tdc\t$%06x\n", \
- ( INTVAL ( VALUE ) & 0xffffff ), \
- (( INTVAL ( VALUE ) >> 24 ) & 0x0000ff ))) : \
- ( fprintf ( FILE, "\tdc\t$%06x\n\tdc\t$%06x\n", \
- ( CONST_DOUBLE_LOW ( VALUE ) & 0xffffff ), \
- ((( CONST_DOUBLE_LOW ( VALUE ) >> 24 ) & 0x0000ff ) | \
- (( CONST_DOUBLE_HIGH ( VALUE ) << 8 ) & 0xffff00 ))))))
-
- #define ASM_OUTPUT_INT(FILE,VALUE) \
- ( fprintf (FILE, "\tdc "), \
- output_addr_const (FILE, (VALUE)), \
- fprintf (FILE, "\n"))
-
- /* Likewise for `short' and `char' constants. */
-
- #define ASM_OUTPUT_SHORT(FILE,VALUE) \
- ( fprintf (FILE, "\tdc "), \
- output_addr_const (FILE, (VALUE)), \
- fprintf (FILE, "\n"))
-
- #define ASM_OUTPUT_CHAR(FILE,VALUE) \
- ( fprintf (FILE, "\tdc "), \
- 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, "\tdc $%x\n", (VALUE))
-
- #define ASM_OUTPUT_ASCII(FILE, P, SIZE) \
- output_ascii (FILE, P, SIZE)
-
- #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE ) \
- ( fprintf (STREAM, "%s\n", DATA_SECTION_ASM_OP ), \
- ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM))
-
- #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE ) \
- fprintf (STREAM, "%s\n", TEXT_SECTION_ASM_OP ) \
-
- /* 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, "\tdc L%d-L%d\n", VALUE, REL)
-
- /* This is how to output an element of a case-vector that is absolute. */
-
- #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
- fprintf (FILE, "\tdc L%d\n", VALUE)
-
- /* 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)
-
- #define ASM_OUTPUT_SKIP(FILE,SIZE) \
- fprintf (FILE, "\tbsc\t%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) \
- ( ASM_GLOBALIZE_LABEL((FILE),(NAME)), \
- assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), "\tbsc\t%d\n", (ROUNDED)))
-
-
- /* This says how to output an assembler line
- to define a local common symbol. */
-
- #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
- ( assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), "\tbsc\t%d\n", (ROUNDED)))
-
- /* 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
-
- /* Print operand X (an rtx) in assembler syntax to file FILE.
- CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
- For `%' followed by punctuation, CODE is the punctuation and X is null.
- */
-
- #define PRINT_OPERAND(FILE, X, CODE) print_operand ( FILE, X, CODE )
-
- /* Print a memory address as an operand to reference that memory location. */
-
- #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address ( FILE, ADDR )
-
- #define ASM_OUTPUT_REG_PUSH( FILE, REGNO )
- #define ASM_OUTPUT_REG_POP( FILE, REGNO )
-
- #define ASM_OUTPUT_OPCODE( FILE, OPCODE )
-
- /* the following definitions and declarations are used to efficiently
- implement the use of either memory space. */
-
- /* this structure is used within the code generator. it is initialized upon
- first use. */
-
- struct dsp_string
- {
- int init;
- char string[124];
- };
-
- /* RETURN_DSP provides a mechanism for the code generator to use this facility
- transparently. */
-
- #define RETURN_DSP( str ) \
- { static struct dsp_string template = { 0, str }; \
- return fix_mem_space ( & template ); }
-
- /* global memory space indicator - either 'x' or 'y'. */
- extern char mem_space;
- extern char memory_model;
- /* tells sdbout which prolog/epilog pair is being used. */
- extern int logue_index;
-
- extern char *fix_mem_space ( );
-
- /* this data type is used to pass information about the function to the
- optimizer and code generator, and pro/epilog generators. */
-
- typedef enum
- {
- FUNC_NO_INFO = 0x0000,
- FUNC_ISNT_LEAF = 0x0001, /* this func makes at least one call */
- FUNC_RETURNS_FLOAT = 0x0002, /* a float/double value is returned */
- FUNC_HAS_STACK_PARMS = 0x0004, /* this func has at least one stack parm */
- FUNC_RETURNS_VOID =0x0008 /* this function is of type void. */
- } func_attributes;
-
- /* a global var used for the aformentioned purpose. */
- extern func_attributes current_func_info;
-
- /* these force a min number of operands allowed. */
- #define MIN_RECOG_OPERANDS 16
- #define MIN_DUP_OPERANDS 16
-
- /* we undef abort so that we can print a proper warning message and not dump
- core. (code in rtl.c) */
- #undef abort
-
- /* this is a kludge.
- the 56k uses accumulators a and b in weird ways. b can hold either
- a 48 bit or 24 bit value. if it holds a 48 bit value, there is no way
- that ( SUBREG:SI ( REG:DI 1 ) 0 ) can be use as an arithmetic operand.
- the same rtl expression *can* be used as a move operand, namely b0.
- eventually we might want to rethink the way that we're numbering registers
- and possibly make accumulators look like a series of concatenated registers.
- this, however, would require major rework of the md file, as each
- SImode arith define_insn would need to be transformed into a define_expand
- and define_insn pair (for example, to reflect the clobber of a2 and a0
- in add x0,a). this change could severely inhibit optimization as well.
-
- for now: we wll define INSN_MACHINE_INFO to differentiate between insns
- that can and cannot accept the above rtl expression type as an operand.
- */
-
- typedef struct
- {
- int can_accept_subreg_acc_p;
- int no_latency_addr_reg_op_p;
- }
- dsp56k_insn_info;
-
- #define INSN_MACHINE_INFO dsp56k_insn_info
- #define DEFAULT_MACHINE_INFO FALSE, FALSE
-
- /* allow certain pragmas. */
- int dsp_process_pragma_line ( );
-
- #define TARGET_PROCESS_PRAGMA_LINE( f ) \
- dsp_process_pragma_line ( f )
-