| /* Definitions of target machine for GNU compiler, Argonaut ARC cpu. |
| Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005 |
| Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GCC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to |
| the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| /* ??? This is an old port, and is undoubtedly suffering from bit rot. */ |
| |
| /* Things to do: |
| |
| - incscc, decscc? |
| - print active compiler options in assembler output |
| */ |
| |
| |
| #undef ASM_SPEC |
| #undef LINK_SPEC |
| #undef STARTFILE_SPEC |
| #undef ENDFILE_SPEC |
| #undef SIZE_TYPE |
| #undef PTRDIFF_TYPE |
| #undef WCHAR_TYPE |
| #undef WCHAR_TYPE_SIZE |
| #undef ASM_OUTPUT_LABELREF |
| |
| /* Print subsidiary information on the compiler version in use. */ |
| #define TARGET_VERSION fprintf (stderr, " (arc)") |
| |
| /* Names to predefine in the preprocessor for this target machine. */ |
| #define TARGET_CPU_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__arc__"); \ |
| if (TARGET_BIG_ENDIAN) \ |
| builtin_define ("__big_endian__"); \ |
| if (arc_cpu_type == 0) \ |
| builtin_define ("__base__"); \ |
| builtin_assert ("cpu=arc"); \ |
| builtin_assert ("machine=arc"); \ |
| } while (0) |
| |
| /* Pass -mmangle-cpu if we get -mcpu=*. |
| Doing it this way lets one have it on as default with -mcpu=*, |
| but also lets one turn it off with -mno-mangle-cpu. */ |
| #define CC1_SPEC "\ |
| %{mcpu=*:-mmangle-cpu} \ |
| %{EB:%{EL:%emay not use both -EB and -EL}} \ |
| %{EB:-mbig-endian} %{EL:-mlittle-endian} \ |
| " |
| |
| #define ASM_SPEC "%{v} %{EB} %{EL}" |
| |
| #define LINK_SPEC "%{v} %{EB} %{EL}" |
| |
| #define STARTFILE_SPEC "%{!shared:crt0.o%s} crtinit.o%s" |
| |
| #define ENDFILE_SPEC "crtfini.o%s" |
| |
| /* Instruction set characteristics. |
| These are internal macros, set by the appropriate -mcpu= option. */ |
| |
| /* Nonzero means the cpu has a barrel shifter. */ |
| #define TARGET_SHIFTER 0 |
| |
| /* Which cpu we're compiling for. */ |
| extern int arc_cpu_type; |
| |
| /* Check if CPU is an extension and set `arc_cpu_type' and `arc_mangle_cpu' |
| appropriately. The result should be nonzero if the cpu is recognized, |
| otherwise zero. This is intended to be redefined in a cover file. |
| This is used by arc_init. */ |
| #define ARC_EXTENSION_CPU(cpu) 0 |
| |
| /* Sometimes certain combinations of command options do not make |
| sense on a particular target machine. You can define a macro |
| `OVERRIDE_OPTIONS' to take account of this. This macro, if |
| defined, is executed once just after all the command options have |
| been parsed. |
| |
| Don't use this macro to turn on various extra optimizations for |
| `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */ |
| |
| |
| #define OVERRIDE_OPTIONS \ |
| do { \ |
| /* These need to be done at start up. It's convenient to do them here. */ \ |
| arc_init (); \ |
| } while (0) |
| |
| /* Target machine storage layout. */ |
| |
| /* Define this if most significant bit is lowest numbered |
| in instructions that operate on numbered bit-fields. */ |
| #define BITS_BIG_ENDIAN 1 |
| |
| /* Define this if most significant byte of a word is the lowest numbered. */ |
| #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN) |
| |
| /* Define this if most significant word of a multiword number is the lowest |
| numbered. */ |
| #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN) |
| |
| /* Define this to set the endianness to use in libgcc2.c, which can |
| not depend on target_flags. */ |
| #ifdef __big_endian__ |
| #define LIBGCC2_WORDS_BIG_ENDIAN 1 |
| #else |
| #define LIBGCC2_WORDS_BIG_ENDIAN 0 |
| #endif |
| |
| /* Width of a word, in units (bytes). */ |
| #define UNITS_PER_WORD 4 |
| |
| /* Define this macro if it is advisable to hold scalars in registers |
| in a wider mode than that declared by the program. In such cases, |
| the value is constrained to be within the bounds of the declared |
| type, but kept valid in the wider mode. The signedness of the |
| extension may differ from that of the type. */ |
| #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ |
| if (GET_MODE_CLASS (MODE) == MODE_INT \ |
| && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ |
| { \ |
| (MODE) = SImode; \ |
| } |
| |
| /* Allocation boundary (in *bits*) for storing arguments in argument list. */ |
| #define PARM_BOUNDARY 32 |
| |
| /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
| #define STACK_BOUNDARY 64 |
| |
| /* ALIGN FRAMES on word boundaries */ |
| #define ARC_STACK_ALIGN(LOC) (((LOC)+7) & ~7) |
| |
| /* Allocation boundary (in *bits*) for the code of a function. */ |
| #define FUNCTION_BOUNDARY 32 |
| |
| /* Alignment of field after `int : 0' in a structure. */ |
| #define EMPTY_FIELD_BOUNDARY 32 |
| |
| /* Every structure's size must be a multiple of this. */ |
| #define STRUCTURE_SIZE_BOUNDARY 8 |
| |
| /* A bit-field declared as `int' forces `int' alignment for the struct. */ |
| #define PCC_BITFIELD_TYPE_MATTERS 1 |
| |
| /* No data type wants to be aligned rounder than this. */ |
| /* This is bigger than currently necessary for the ARC. If 8 byte floats are |
| ever added it's not clear whether they'll need such alignment or not. For |
| now we assume they will. We can always relax it if necessary but the |
| reverse isn't true. */ |
| #define BIGGEST_ALIGNMENT 64 |
| |
| /* The best alignment to use in cases where we have a choice. */ |
| #define FASTEST_ALIGNMENT 32 |
| |
| /* Make strings word-aligned so strcpy from constants will be faster. */ |
| #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ |
| ((TREE_CODE (EXP) == STRING_CST \ |
| && (ALIGN) < FASTEST_ALIGNMENT) \ |
| ? FASTEST_ALIGNMENT : (ALIGN)) |
| |
| /* Make arrays of chars word-aligned for the same reasons. */ |
| #define DATA_ALIGNMENT(TYPE, ALIGN) \ |
| (TREE_CODE (TYPE) == ARRAY_TYPE \ |
| && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ |
| && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) |
| |
| /* Set this nonzero if move instructions will actually fail to work |
| when given unaligned data. */ |
| /* On the ARC the lower address bits are masked to 0 as necessary. The chip |
| won't croak when given an unaligned address, but the insn will still fail |
| to produce the correct result. */ |
| #define STRICT_ALIGNMENT 1 |
| |
| /* Layout of source language data types. */ |
| |
| #define SHORT_TYPE_SIZE 16 |
| #define INT_TYPE_SIZE 32 |
| #define LONG_TYPE_SIZE 32 |
| #define LONG_LONG_TYPE_SIZE 64 |
| #define FLOAT_TYPE_SIZE 32 |
| #define DOUBLE_TYPE_SIZE 64 |
| #define LONG_DOUBLE_TYPE_SIZE 64 |
| |
| /* Define this as 1 if `char' should by default be signed; else as 0. */ |
| #define DEFAULT_SIGNED_CHAR 1 |
| |
| #define SIZE_TYPE "long unsigned int" |
| #define PTRDIFF_TYPE "long int" |
| #define WCHAR_TYPE "short unsigned int" |
| #define WCHAR_TYPE_SIZE 16 |
| |
| /* 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. */ |
| /* Registers 61, 62, and 63 are not really registers and we needn't treat |
| them as such. We still need a register for the condition code. */ |
| #define FIRST_PSEUDO_REGISTER 62 |
| |
| /* 1 for registers that have pervasive standard uses |
| and are not available for the register allocator. |
| |
| 0-28 - general purpose registers |
| 29 - ilink1 (interrupt link register) |
| 30 - ilink2 (interrupt link register) |
| 31 - blink (branch link register) |
| 32-59 - reserved for extensions |
| 60 - LP_COUNT |
| 61 - condition code |
| |
| For doc purposes: |
| 61 - short immediate data indicator (setting flags) |
| 62 - long immediate data indicator |
| 63 - short immediate data indicator (not setting flags). |
| |
| The general purpose registers are further broken down into: |
| 0-7 - arguments/results |
| 8-15 - call used |
| 16-23 - call saved |
| 24 - call used, static chain pointer |
| 25 - call used, gptmp |
| 26 - global pointer |
| 27 - frame pointer |
| 28 - stack pointer |
| |
| By default, the extension registers are not available. */ |
| |
| #define FIXED_REGISTERS \ |
| { 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 1, 1, 1, 1, 0, \ |
| \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1 } |
| |
| /* 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. */ |
| |
| #define CALL_USED_REGISTERS \ |
| { 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1 } |
| |
| /* If defined, an initializer for a vector of integers, containing the |
| numbers of hard registers in the order in which GCC should |
| prefer to use them (from most preferred to least). */ |
| #define REG_ALLOC_ORDER \ |
| { 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, \ |
| 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 31, \ |
| 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \ |
| 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, \ |
| 27, 28, 29, 30 } |
| |
| /* Macro to conditionally modify fixed_regs/call_used_regs. */ |
| #define CONDITIONAL_REGISTER_USAGE \ |
| do { \ |
| if (PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM) \ |
| { \ |
| fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ |
| call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ |
| } \ |
| } while (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. */ |
| #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. */ |
| extern const unsigned int arc_hard_regno_mode_ok[]; |
| extern unsigned int arc_mode_class[]; |
| #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
| ((arc_hard_regno_mode_ok[REGNO] & arc_mode_class[MODE]) != 0) |
| |
| /* A C expression that is nonzero if it is desirable to choose |
| register allocation so as to avoid move instructions between a |
| value of mode MODE1 and a value of mode MODE2. |
| |
| If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, |
| MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1, |
| MODE2)' must be zero. */ |
| |
| /* Tie QI/HI/SI modes together. */ |
| #define MODES_TIEABLE_P(MODE1, MODE2) \ |
| (GET_MODE_CLASS (MODE1) == MODE_INT \ |
| && GET_MODE_CLASS (MODE2) == MODE_INT \ |
| && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ |
| && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) |
| |
| /* Register classes and constants. */ |
| |
| /* 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. |
| |
| It is important that any condition codes have class NO_REGS. |
| See `register_operand'. */ |
| |
| enum reg_class { |
| NO_REGS, LPCOUNT_REG, GENERAL_REGS, 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", "LPCOUNT_REG", "GENERAL_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 \ |
| { {0, 0}, {0, 0x10000000}, {0xffffffff, 0xfffffff}, \ |
| {0xffffffff, 0x1fffffff} } |
| |
| /* 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. */ |
| extern enum reg_class arc_regno_reg_class[FIRST_PSEUDO_REGISTER]; |
| #define REGNO_REG_CLASS(REGNO) \ |
| (arc_regno_reg_class[REGNO]) |
| |
| /* The class value for index registers, and the one for base regs. */ |
| #define INDEX_REG_CLASS GENERAL_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) == 'l' ? LPCOUNT_REG /* ??? needed? */ \ |
| : NO_REGS) |
| |
| /* 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) \ |
| ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32) |
| #define REGNO_OK_FOR_INDEX_P(REGNO) \ |
| ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32) |
| |
| /* 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) \ |
| ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
| |
| /* 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. */ |
| /* 'I' is used for short immediates (always signed). |
| 'J' is used for long immediates. |
| 'K' is used for any constant up to 64 bits (for 64x32 situations?). */ |
| |
| /* local to this file */ |
| #define SMALL_INT(X) ((unsigned) ((X) + 0x100) < 0x200) |
| /* local to this file */ |
| #define LARGE_INT(X) \ |
| ((X) >= (-(HOST_WIDE_INT) 0x7fffffff - 1) \ |
| && (unsigned HOST_WIDE_INT)(X) <= (unsigned HOST_WIDE_INT) 0xffffffff) |
| |
| #define CONST_OK_FOR_LETTER_P(VALUE, C) \ |
| ((C) == 'I' ? SMALL_INT (VALUE) \ |
| : (C) == 'J' ? LARGE_INT (VALUE) \ |
| : (C) == 'K' ? 1 \ |
| : 0) |
| |
| /* Similar, but for floating constants, and defining letters G and H. |
| Here VALUE is the CONST_DOUBLE rtx itself. */ |
| /* 'G' is used for integer values for the multiplication insns where the |
| operands are extended from 4 bytes to 8 bytes. |
| 'H' is used when any 64 bit constant is allowed. */ |
| #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ |
| ((C) == 'G' ? arc_double_limm_p (VALUE) \ |
| : (C) == 'H' ? 1 \ |
| : 0) |
| |
| /* A C expression that defines the optional machine-dependent constraint |
| letters that can be used to segregate specific types of operands, |
| usually memory references, for the target machine. It should return 1 if |
| VALUE corresponds to the operand type represented by the constraint letter |
| C. If C is not defined as an extra constraint, the value returned should |
| be 0 regardless of VALUE. */ |
| /* ??? This currently isn't used. Waiting for PIC. */ |
| #if 0 |
| #define EXTRA_CONSTRAINT(VALUE, C) \ |
| ((C) == 'R' ? (SYMBOL_REF_FUNCTION_P (VALUE) || GET_CODE (VALUE) == LABEL_REF) \ |
| : 0) |
| #endif |
| |
| /* Stack layout and stack pointer usage. */ |
| |
| /* Define this macro if pushing a word onto the stack moves the stack |
| pointer to a smaller address. */ |
| #define STACK_GROWS_DOWNWARD |
| |
| /* Define this to nonzero 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 1 |
| |
| /* 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 |
| |
| /* Offset from the stack pointer register to the first location at which |
| outgoing arguments are placed. */ |
| #define STACK_POINTER_OFFSET FIRST_PARM_OFFSET (0) |
| |
| /* Offset of first parameter from the argument pointer register value. */ |
| /* 4 bytes for each of previous fp, return address, and previous gp. |
| 4 byte reserved area for future considerations. */ |
| #define FIRST_PARM_OFFSET(FNDECL) 16 |
| |
| /* A C expression whose value is RTL representing the address in a |
| stack frame where the pointer to the caller's frame is stored. |
| Assume that FRAMEADDR is an RTL expression for the address of the |
| stack frame itself. |
| |
| If you don't define this macro, the default is to return the value |
| of FRAMEADDR--that is, the stack frame address is also the address |
| of the stack word that points to the previous frame. */ |
| /* ??? unfinished */ |
| /*define DYNAMIC_CHAIN_ADDRESS (FRAMEADDR)*/ |
| |
| /* A C expression whose value is RTL representing the value of the |
| return address for the frame COUNT steps up from the current frame. |
| FRAMEADDR is the frame pointer of the COUNT frame, or the frame |
| pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' |
| is defined. */ |
| /* The current return address is in r31. The return address of anything |
| farther back is at [%fp,4]. */ |
| #if 0 /* The default value should work. */ |
| #define RETURN_ADDR_RTX(COUNT, FRAME) \ |
| (((COUNT) == -1) \ |
| ? gen_rtx_REG (Pmode, 31) \ |
| : copy_to_reg (gen_rtx_MEM (Pmode, \ |
| memory_address (Pmode, \ |
| plus_constant ((FRAME), \ |
| UNITS_PER_WORD))))) |
| #endif |
| |
| /* Register to use for pushing function arguments. */ |
| #define STACK_POINTER_REGNUM 28 |
| |
| /* Base register for access to local variables of the function. */ |
| #define FRAME_POINTER_REGNUM 27 |
| |
| /* Base register for access to arguments of the function. */ |
| #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM |
| |
| /* Register in which static-chain is passed to a function. This must |
| not be a register used by the prologue. */ |
| #define STATIC_CHAIN_REGNUM 24 |
| |
| /* A C expression which is nonzero if a function must have and use a |
| frame pointer. This expression is evaluated in the reload pass. |
| If its value is nonzero the function will have a frame pointer. */ |
| #define FRAME_POINTER_REQUIRED \ |
| (current_function_calls_alloca) |
| |
| /* C statement to store the difference between the frame pointer |
| and the stack pointer values immediately after the function prologue. */ |
| #define INITIAL_FRAME_POINTER_OFFSET(VAR) \ |
| ((VAR) = arc_compute_frame_size (get_frame_size ())) |
| |
| /* Function argument passing. */ |
| |
| /* If defined, the maximum amount of space required for outgoing |
| arguments will be computed and placed into the variable |
| `current_function_outgoing_args_size'. No space will be pushed |
| onto the stack for each call; instead, the function prologue should |
| increase the stack frame size by this amount. */ |
| #define ACCUMULATE_OUTGOING_ARGS 1 |
| |
| /* Value is the number of bytes of arguments automatically |
| popped when returning from a subroutine call. |
| FUNDECL is the declaration node of the function (as a tree), |
| 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. */ |
| #define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 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, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
| ((CUM) = 0) |
| |
| /* The number of registers used for parameter passing. Local to this file. */ |
| #define MAX_ARC_PARM_REGS 8 |
| |
| /* 1 if N is a possible register number for function argument passing. */ |
| #define FUNCTION_ARG_REGNO_P(N) \ |
| ((unsigned) (N) < MAX_ARC_PARM_REGS) |
| |
| /* The ROUND_ADVANCE* macros are local to this file. */ |
| /* Round SIZE up to a word boundary. */ |
| #define ROUND_ADVANCE(SIZE) \ |
| (((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
| |
| /* Round arg MODE/TYPE up to the next word boundary. */ |
| #define ROUND_ADVANCE_ARG(MODE, TYPE) \ |
| ((MODE) == BLKmode \ |
| ? ROUND_ADVANCE (int_size_in_bytes (TYPE)) \ |
| : ROUND_ADVANCE (GET_MODE_SIZE (MODE))) |
| |
| /* Round CUM up to the necessary point for argument MODE/TYPE. */ |
| #define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) \ |
| ((((MODE) == BLKmode ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) \ |
| > BITS_PER_WORD) \ |
| ? (((CUM) + 1) & ~1) \ |
| : (CUM)) |
| |
| /* Return boolean indicating arg of type TYPE and mode MODE will be passed in |
| a reg. This includes arguments that have to be passed by reference as the |
| pointer to them is passed in a reg if one is available (and that is what |
| we're given). |
| This macro is only used in this file. */ |
| #define PASS_IN_REG_P(CUM, MODE, TYPE) \ |
| ((CUM) < MAX_ARC_PARM_REGS \ |
| && ((ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \ |
| + ROUND_ADVANCE_ARG ((MODE), (TYPE)) \ |
| <= MAX_ARC_PARM_REGS))) |
| |
| /* 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). */ |
| /* On the ARC the first MAX_ARC_PARM_REGS args are normally in registers |
| and the rest are pushed. */ |
| #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ |
| (PASS_IN_REG_P ((CUM), (MODE), (TYPE)) \ |
| ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \ |
| : 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) = (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \ |
| + ROUND_ADVANCE_ARG ((MODE), (TYPE)))) |
| |
| /* If defined, a C expression that gives the alignment boundary, in bits, |
| of an argument with the specified mode and type. If it is not defined, |
| PARM_BOUNDARY is used for all arguments. */ |
| #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ |
| (((TYPE) ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) <= PARM_BOUNDARY \ |
| ? PARM_BOUNDARY \ |
| : 2 * PARM_BOUNDARY) |
| |
| /* Function results. */ |
| |
| /* 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 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. */ |
| #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0) |
| |
| /* 1 if N is a possible register number for a function value |
| as seen by the caller. */ |
| /* ??? What about r1 in DI/DF values. */ |
| #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) |
| |
| /* Tell GCC to use TARGET_RETURN_IN_MEMORY. */ |
| #define DEFAULT_PCC_STRUCT_RETURN 0 |
| |
| /* 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 |
| |
| /* Epilogue delay slots. */ |
| #define DELAY_SLOTS_FOR_EPILOGUE arc_delay_slots_for_epilogue () |
| |
| #define ELIGIBLE_FOR_EPILOGUE_DELAY(TRIAL, SLOTS_FILLED) \ |
| arc_eligible_for_epilogue_delay (TRIAL, SLOTS_FILLED) |
| |
| /* Output assembler code to FILE to increment profiler label # LABELNO |
| for profiling a function entry. */ |
| #define FUNCTION_PROFILER(FILE, LABELNO) |
| |
| /* Trampolines. */ |
| /* ??? This doesn't work yet because GCC will use as the address of a nested |
| function the address of the trampoline. We need to use that address |
| right shifted by 2. It looks like we'll need PSImode after all. :-( */ |
| |
| /* Output assembler code for a block containing the constant parts |
| of a trampoline, leaving space for the variable parts. */ |
| /* On the ARC, the trampoline is quite simple as we have 32 bit immediate |
| constants. |
| |
| mov r24,STATIC |
| j.nd FUNCTION |
| */ |
| #define TRAMPOLINE_TEMPLATE(FILE) \ |
| do { \ |
| assemble_aligned_integer (UNITS_PER_WORD, GEN_INT (0x631f7c00)); \ |
| assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \ |
| assemble_aligned_integer (UNITS_PER_WORD, GEN_INT (0x381f0000)); \ |
| assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \ |
| } while (0) |
| |
| /* Length in units of the trampoline for entering a nested function. */ |
| #define TRAMPOLINE_SIZE 16 |
| |
| /* 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. */ |
| #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ |
| do { \ |
| emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 4)), CXT); \ |
| emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 12)), FNADDR); \ |
| emit_insn (gen_flush_icache (validize_mem (gen_rtx_MEM (SImode, TRAMP)))); \ |
| } while (0) |
| |
| /* Addressing modes, and classification of registers for them. */ |
| |
| /* Maximum number of registers that can appear in a valid memory address. */ |
| /* The `ld' insn allows 2, but the `st' insn only allows 1. */ |
| #define MAX_REGS_PER_ADDRESS 1 |
| |
| /* We have pre inc/dec (load/store with update). */ |
| #define HAVE_PRE_INCREMENT 1 |
| #define HAVE_PRE_DECREMENT 1 |
| |
| /* Recognize any constant value 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) |
| |
| /* Nonzero if the constant value X is a legitimate general operand. |
| We can handle any 32 or 64 bit constant. */ |
| /* "1" should work since the largest constant should be a 64 bit critter. */ |
| /* ??? Not sure what to do for 64x32 compiler. */ |
| #define LEGITIMATE_CONSTANT_P(X) 1 |
| |
| /* 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) \ |
| ((unsigned) REGNO (X) - 32 >= FIRST_PSEUDO_REGISTER - 32) |
| /* 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) \ |
| ((unsigned) REGNO (X) - 32 >= FIRST_PSEUDO_REGISTER - 32) |
| |
| #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 `ld' insn allows [reg],[reg+shimm],[reg+limm],[reg+reg],[limm] |
| but the `st' insn only allows [reg],[reg+shimm],[limm]. |
| The only thing we can do is only allow the most strict case `st' and hope |
| other parts optimize out the restrictions for `ld'. */ |
| |
| /* local to this file */ |
| #define RTX_OK_FOR_BASE_P(X) \ |
| (REG_P (X) && REG_OK_FOR_BASE_P (X)) |
| |
| /* local to this file */ |
| #define RTX_OK_FOR_INDEX_P(X) \ |
| (0 && /*???*/ REG_P (X) && REG_OK_FOR_INDEX_P (X)) |
| |
| /* local to this file */ |
| /* ??? Loads can handle any constant, stores can only handle small ones. */ |
| #define RTX_OK_FOR_OFFSET_P(X) \ |
| (GET_CODE (X) == CONST_INT && SMALL_INT (INTVAL (X))) |
| |
| #define LEGITIMATE_OFFSET_ADDRESS_P(MODE, X) \ |
| (GET_CODE (X) == PLUS \ |
| && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \ |
| && (RTX_OK_FOR_INDEX_P (XEXP (X, 1)) \ |
| || RTX_OK_FOR_OFFSET_P (XEXP (X, 1)))) |
| |
| #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ |
| { if (RTX_OK_FOR_BASE_P (X)) \ |
| goto ADDR; \ |
| if (LEGITIMATE_OFFSET_ADDRESS_P ((MODE), (X))) \ |
| goto ADDR; \ |
| if (GET_CODE (X) == CONST_INT && LARGE_INT (INTVAL (X))) \ |
| goto ADDR; \ |
| if (GET_CODE (X) == SYMBOL_REF \ |
| || GET_CODE (X) == LABEL_REF \ |
| || GET_CODE (X) == CONST) \ |
| goto ADDR; \ |
| if ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \ |
| /* We're restricted here by the `st' insn. */ \ |
| && RTX_OK_FOR_BASE_P (XEXP ((X), 0))) \ |
| goto ADDR; \ |
| } |
| |
| /* 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) \ |
| { if (GET_CODE (ADDR) == PRE_DEC) \ |
| goto LABEL; \ |
| if (GET_CODE (ADDR) == PRE_INC) \ |
| goto LABEL; \ |
| } |
| |
| /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, |
| return the mode to be used for the comparison. */ |
| #define SELECT_CC_MODE(OP, X, Y) \ |
| arc_select_cc_mode (OP, X, Y) |
| |
| /* Return nonzero if SELECT_CC_MODE will never return MODE for a |
| floating point inequality comparison. */ |
| #define REVERSIBLE_CC_MODE(MODE) 1 /*???*/ |
| |
| /* Costs. */ |
| |
| /* Compute extra cost of moving data between one register class |
| and another. */ |
| #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) 2 |
| |
| /* Compute the cost of moving data between registers and memory. */ |
| /* Memory is 3 times as expensive as registers. |
| ??? Is that the right way to look at it? */ |
| #define MEMORY_MOVE_COST(MODE,CLASS,IN) \ |
| (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD ? 6 : 12) |
| |
| /* The cost of a branch insn. */ |
| /* ??? What's the right value here? Branches are certainly more |
| expensive than reg->reg moves. */ |
| #define BRANCH_COST 2 |
| |
| /* Nonzero if access to memory by bytes is slow and undesirable. |
| For RISC chips, it means that access to memory by bytes is no |
| better than access by words when possible, so grab a whole word |
| and maybe make use of that. */ |
| #define SLOW_BYTE_ACCESS 1 |
| |
| /* Define this macro if it is as good or better to call a constant |
| function address than to call an address kept in a register. */ |
| /* On the ARC, calling through registers is slow. */ |
| #define NO_FUNCTION_CSE |
| |
| /* Section selection. */ |
| /* WARNING: These section names also appear in dwarfout.c. */ |
| |
| /* The names of the text, data, and readonly-data sections are runtime |
| selectable. */ |
| |
| #define ARC_SECTION_FORMAT "\t.section %s" |
| #define ARC_DEFAULT_TEXT_SECTION ".text" |
| #define ARC_DEFAULT_DATA_SECTION ".data" |
| #define ARC_DEFAULT_RODATA_SECTION ".rodata" |
| |
| extern const char *arc_text_section, *arc_data_section, *arc_rodata_section; |
| |
| /* initfini.c uses this in an asm. */ |
| #if defined (CRT_INIT) || defined (CRT_FINI) |
| #define TEXT_SECTION_ASM_OP "\t.section .text" |
| #else |
| #define TEXT_SECTION_ASM_OP arc_text_section |
| #endif |
| #define DATA_SECTION_ASM_OP arc_data_section |
| |
| #undef READONLY_DATA_SECTION_ASM_OP |
| #define READONLY_DATA_SECTION_ASM_OP arc_rodata_section |
| |
| #define BSS_SECTION_ASM_OP "\t.section .bss" |
| |
| /* Define this macro if jump tables (for tablejump insns) should be |
| output in the text section, along with the assembler instructions. |
| Otherwise, the readonly data section is used. |
| This macro is irrelevant if there is no separate readonly data section. */ |
| /*#define JUMP_TABLES_IN_TEXT_SECTION*/ |
| |
| /* For DWARF. Marginally different than default so output is "prettier" |
| (and consistent with above). */ |
| #define PUSHSECTION_ASM_OP "\t.section " |
| |
| /* Tell crtstuff.c we're using ELF. */ |
| #define OBJECT_FORMAT_ELF |
| |
| /* PIC */ |
| |
| /* The register number of the register used to address a table of static |
| data addresses in memory. In some cases this register is defined by a |
| processor's ``application binary interface'' (ABI). When this macro |
| is defined, RTL is generated for this register once, as with the stack |
| pointer and frame pointer registers. If this macro is not defined, it |
| is up to the machine-dependent files to allocate such a register (if |
| necessary). */ |
| #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? 26 : INVALID_REGNUM) |
| |
| /* Define this macro if the register defined by PIC_OFFSET_TABLE_REGNUM is |
| clobbered by calls. Do not define this macro if PIC_OFFSET_TABLE_REGNUM |
| is not defined. */ |
| /* This register is call-saved on the ARC. */ |
| /*#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED*/ |
| |
| /* A C expression that is nonzero if X is a legitimate immediate |
| operand on the target machine when generating position independent code. |
| You can assume that X satisfies CONSTANT_P, so you need not |
| check this. You can also assume `flag_pic' is true, so you need not |
| check it either. You need not define this macro if all constants |
| (including SYMBOL_REF) can be immediate operands when generating |
| position independent code. */ |
| /*#define LEGITIMATE_PIC_OPERAND_P(X)*/ |
| |
| /* Control the assembler format that we output. */ |
| |
| /* A C string constant describing how to begin a comment in the target |
| assembler language. The compiler assumes that the comment will |
| end at the end of the line. */ |
| #define ASM_COMMENT_START ";" |
| |
| /* Output to assembler file text saying following lines |
| may contain character constants, extra white space, comments, etc. */ |
| #define ASM_APP_ON "" |
| |
| /* Output to assembler file text saying following lines |
| no longer contain unusual constructs. */ |
| #define ASM_APP_OFF "" |
| |
| /* Globalizing directive for a label. */ |
| #define GLOBAL_ASM_OP "\t.global\t" |
| |
| /* This is how to output a reference to a user-level label named NAME. |
| `assemble_name' uses this. */ |
| /* We mangle all user labels to provide protection from linking code |
| compiled for different cpus. */ |
| /* We work around a dwarfout.c deficiency by watching for labels from it and |
| not adding the '_' prefix nor the cpu suffix. There is a comment in |
| dwarfout.c that says it should be using (*targetm.asm_out.internal_label). */ |
| extern const char *arc_mangle_cpu; |
| #define ASM_OUTPUT_LABELREF(FILE, NAME) \ |
| do { \ |
| if ((NAME)[0] == '.' && (NAME)[1] == 'L') \ |
| fprintf (FILE, "%s", NAME); \ |
| else \ |
| { \ |
| fputc ('_', FILE); \ |
| if (TARGET_MANGLE_CPU && arc_mangle_cpu != NULL) \ |
| fprintf (FILE, "%s_", arc_mangle_cpu); \ |
| fprintf (FILE, "%s", NAME); \ |
| } \ |
| } while (0) |
| |
| /* Assembler pseudo-op to equate one value with another. */ |
| /* ??? This is needed because dwarfout.c provides a default definition too |
| late for defaults.h (which contains the default definition of ASM_OUTPUT_DEF |
| that we use). */ |
| #define SET_ASM_OP "\t.set\t" |
| |
| /* 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", \ |
| "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ |
| "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ |
| "r24", "r25", "r26", "fp", "sp", "ilink1", "ilink2", "blink", \ |
| "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", \ |
| "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", \ |
| "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", \ |
| "r56", "r57", "r58", "r59", "lp_count", "cc"} |
| |
| /* Entry to the insn conditionalizer. */ |
| #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ |
| arc_final_prescan_insn (INSN, OPVEC, NOPERANDS) |
| |
| /* A C expression which evaluates to true if CODE is a valid |
| punctuation character for use in the `PRINT_OPERAND' macro. */ |
| extern char arc_punct_chars[256]; |
| #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ |
| arc_punct_chars[(unsigned char) (CHAR)] |
| |
| /* 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) \ |
| arc_print_operand (FILE, X, CODE) |
| |
| /* A C compound statement to output to stdio stream STREAM the |
| assembler syntax for an instruction operand that is a memory |
| reference whose address is ADDR. ADDR is an RTL expression. */ |
| #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ |
| arc_print_operand_address (FILE, ADDR) |
| |
| /* This is how to output an element of a case-vector that is absolute. */ |
| #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ |
| do { \ |
| char label[30]; \ |
| ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ |
| fprintf (FILE, "\t.word %%st("); \ |
| assemble_name (FILE, label); \ |
| fprintf (FILE, ")\n"); \ |
| } while (0) |
| |
| /* This is how to output an element of a case-vector that is relative. */ |
| #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
| do { \ |
| char label[30]; \ |
| ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ |
| fprintf (FILE, "\t.word %%st("); \ |
| assemble_name (FILE, label); \ |
| fprintf (FILE, "-"); \ |
| ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ |
| assemble_name (FILE, label); \ |
| fprintf (FILE, ")\n"); \ |
| } while (0) |
| |
| /* The desired alignment for the location counter at the beginning |
| of a loop. */ |
| /* On the ARC, align loops to 32 byte boundaries (cache line size) |
| if -malign-loops. */ |
| #define LOOP_ALIGN(LABEL) (TARGET_ALIGN_LOOPS ? 5 : 0) |
| |
| /* 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) \ |
| do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", 1 << (LOG)); } while (0) |
| |
| /* Debugging information. */ |
| |
| /* Generate DBX and DWARF debugging information. */ |
| #define DBX_DEBUGGING_INFO 1 |
| |
| /* Prefer STABS (for now). */ |
| #undef PREFERRED_DEBUGGING_TYPE |
| #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG |
| |
| /* Turn off splitting of long stabs. */ |
| #define DBX_CONTIN_LENGTH 0 |
| |
| /* Miscellaneous. */ |
| |
| /* Specify the machine mode that this machine uses |
| for the index in the tablejump instruction. */ |
| #define CASE_VECTOR_MODE Pmode |
| |
| /* Define if operations between registers always perform the operation |
| on the full register even if a narrower mode is specified. */ |
| #define WORD_REGISTER_OPERATIONS |
| |
| /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD |
| will either zero-extend or sign-extend. The value of this macro should |
| be the code that says which one of the two operations is implicitly |
| done, UNKNOWN if none. */ |
| #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND |
| |
| /* Max number of bytes we can move from memory to memory |
| in one reasonably fast instruction. */ |
| #define MOVE_MAX 4 |
| |
| /* Define this to be nonzero if shift instructions ignore all but the low-order |
| few bits. */ |
| #define SHIFT_COUNT_TRUNCATED 1 |
| |
| /* 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. */ |
| /* ??? The arc doesn't have full 32 bit pointers, but making this PSImode has |
| its own problems (you have to add extendpsisi2 and trucnsipsi2 but how does |
| one do it without getting excess code?). Try to avoid it. */ |
| #define Pmode SImode |
| |
| /* A function address in a call instruction. */ |
| #define FUNCTION_MODE SImode |
| |
| /* alloca should avoid clobbering the old register save area. */ |
| /* ??? Not defined in tm.texi. */ |
| #define SETJMP_VIA_SAVE_AREA |
| |
| /* Define the information needed to generate branch and scc insns. This is |
| stored from the compare operation. Note that we can't use "rtx" here |
| since it hasn't been defined! */ |
| extern struct rtx_def *arc_compare_op0, *arc_compare_op1; |
| |
| /* ARC function types. */ |
| enum arc_function_type { |
| ARC_FUNCTION_UNKNOWN, ARC_FUNCTION_NORMAL, |
| /* These are interrupt handlers. The name corresponds to the register |
| name that contains the return address. */ |
| ARC_FUNCTION_ILINK1, ARC_FUNCTION_ILINK2 |
| }; |
| #define ARC_INTERRUPT_P(TYPE) \ |
| ((TYPE) == ARC_FUNCTION_ILINK1 || (TYPE) == ARC_FUNCTION_ILINK2) |
| /* Compute the type of a function from its DECL. */ |
| |
| |
| /* Implement `va_start' for varargs and stdarg. */ |
| #define EXPAND_BUILTIN_VA_START(valist, nextarg) \ |
| arc_va_start (valist, nextarg) |