| /* Definitions of target machine for GNU compiler, |
| for Motorola M*CORE Processor. |
| Copyright (C) 1993, 1999, 2000, 2001, 2002, 2003, 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. */ |
| |
| #ifndef GCC_MCORE_H |
| #define GCC_MCORE_H |
| |
| /* RBE: need to move these elsewhere. */ |
| #undef LIKE_PPC_ABI |
| #define MCORE_STRUCT_ARGS |
| /* RBE: end of "move elsewhere". */ |
| |
| /* Run-time Target Specification. */ |
| #define TARGET_MCORE |
| |
| /* Get tree.c to declare a target-specific specialization of |
| merge_decl_attributes. */ |
| #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 |
| |
| #define TARGET_CPU_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__mcore__"); \ |
| builtin_define ("__MCORE__"); \ |
| if (TARGET_LITTLE_END) \ |
| builtin_define ("__MCORELE__"); \ |
| else \ |
| builtin_define ("__MCOREBE__"); \ |
| if (TARGET_M340) \ |
| builtin_define ("__M340__"); \ |
| else \ |
| builtin_define ("__M210__"); \ |
| } \ |
| while (0) |
| |
| /* If -m4align is ever re-enabled then add this line to the definition of CPP_SPEC |
| %{!m4align:-D__MCORE_ALIGN_8__} %{m4align:-D__MCORE__ALIGN_4__}. */ |
| #undef CPP_SPEC |
| #define CPP_SPEC "%{m210:%{mlittle-endian:%ethe m210 does not have little endian support}}" |
| |
| /* We don't have a -lg library, so don't put it in the list. */ |
| #undef LIB_SPEC |
| #define LIB_SPEC "%{!shared: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}" |
| |
| #undef ASM_SPEC |
| #define ASM_SPEC "%{mbig-endian:-EB} %{m210:-cpu=210 -EB}" |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC "%{mbig-endian:-EB} %{m210:-EB} -X" |
| |
| #define TARGET_DEFAULT \ |
| (MASK_HARDLIT \ |
| | MASK_8ALIGN \ |
| | MASK_DIV \ |
| | MASK_RELAX_IMM \ |
| | MASK_M340 \ |
| | MASK_LITTLE_END) |
| |
| #ifndef MULTILIB_DEFAULTS |
| #define MULTILIB_DEFAULTS { "mlittle-endian", "m340" } |
| #endif |
| |
| /* The ability to have 4 byte alignment is being suppressed for now. |
| If this ability is reenabled, you must disable the definition below |
| *and* edit t-mcore to enable multilibs for 4 byte alignment code. */ |
| #undef TARGET_8ALIGN |
| #define TARGET_8ALIGN 1 |
| |
| extern char * mcore_current_function_name; |
| |
| /* The MCore ABI says that bitfields are unsigned by default. */ |
| #define CC1_SPEC "-funsigned-bitfields" |
| |
| /* What options are we going to default to specific settings when |
| -O* happens; the user can subsequently override these settings. |
| |
| Omitting the frame pointer is a very good idea on the MCore. |
| Scheduling isn't worth anything on the current MCore implementation. */ |
| #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \ |
| { \ |
| if (LEVEL) \ |
| { \ |
| flag_no_function_cse = 1; \ |
| flag_omit_frame_pointer = 1; \ |
| \ |
| if (LEVEL >= 2) \ |
| { \ |
| flag_caller_saves = 0; \ |
| flag_schedule_insns = 0; \ |
| flag_schedule_insns_after_reload = 0; \ |
| } \ |
| } \ |
| if (SIZE) \ |
| { \ |
| target_flags &= ~MASK_HARDLIT; \ |
| } \ |
| } |
| |
| /* What options are we going to force to specific settings, |
| regardless of what the user thought he wanted. |
| We also use this for some post-processing of options. */ |
| #define OVERRIDE_OPTIONS mcore_override_options () |
| |
| /* Target machine storage Layout. */ |
| |
| #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ |
| if (GET_MODE_CLASS (MODE) == MODE_INT \ |
| && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ |
| { \ |
| (MODE) = SImode; \ |
| (UNSIGNEDP) = 1; \ |
| } |
| |
| /* Define this if most significant bit is lowest numbered |
| in instructions that operate on numbered bit-fields. */ |
| #define BITS_BIG_ENDIAN 0 |
| |
| /* Define this if most significant byte of a word is the lowest numbered. */ |
| #define BYTES_BIG_ENDIAN (! TARGET_LITTLE_END) |
| |
| /* Define this if most significant word of a multiword number is the lowest |
| numbered. */ |
| #define WORDS_BIG_ENDIAN (! TARGET_LITTLE_END) |
| |
| #define LIBGCC2_WORDS_BIG_ENDIAN 1 |
| #ifdef __MCORELE__ |
| #undef LIBGCC2_WORDS_BIG_ENDIAN |
| #define LIBGCC2_WORDS_BIG_ENDIAN 0 |
| #endif |
| |
| #define MAX_BITS_PER_WORD 32 |
| |
| /* Width of a word, in units (bytes). */ |
| #define UNITS_PER_WORD 4 |
| |
| /* A C expression for the size in bits of the type `long long' on the |
| target machine. If you don't define this, the default is two |
| words. */ |
| #define LONG_LONG_TYPE_SIZE 64 |
| |
| /* Allocation boundary (in *bits*) for storing arguments in argument list. */ |
| #define PARM_BOUNDARY 32 |
| |
| /* Doubles must be aligned to an 8 byte boundary. */ |
| #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ |
| ((MODE != BLKmode && (GET_MODE_SIZE (MODE) == 8)) \ |
| ? BIGGEST_ALIGNMENT : PARM_BOUNDARY) |
| |
| /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
| #define STACK_BOUNDARY (TARGET_8ALIGN ? 64 : 32) |
| |
| /* Largest increment in UNITS we allow the stack to grow in a single operation. */ |
| extern int mcore_stack_increment; |
| #define STACK_UNITS_MAXSTEP 4096 |
| |
| /* Allocation boundary (in *bits*) for the code of a function. */ |
| #define FUNCTION_BOUNDARY ((TARGET_OVERALIGN_FUNC) ? 32 : 16) |
| |
| /* Alignment of field after `int : 0' in a structure. */ |
| #define EMPTY_FIELD_BOUNDARY 32 |
| |
| /* No data type wants to be aligned rounder than this. */ |
| #define BIGGEST_ALIGNMENT (TARGET_8ALIGN ? 64 : 32) |
| |
| /* The best alignment to use in cases where we have a choice. */ |
| #define FASTEST_ALIGNMENT 32 |
| |
| /* Every structures size must be a multiple of 8 bits. */ |
| #define STRUCTURE_SIZE_BOUNDARY 8 |
| |
| /* Look at the fundamental type that is used for a bit-field and use |
| that to impose alignment on the enclosing structure. |
| struct s {int a:8}; should have same alignment as "int", not "char". */ |
| #define PCC_BITFIELD_TYPE_MATTERS 1 |
| |
| /* Largest integer machine mode for structures. If undefined, the default |
| is GET_MODE_SIZE(DImode). */ |
| #define MAX_FIXED_MODE_SIZE 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. */ |
| #define STRICT_ALIGNMENT 1 |
| |
| /* Standard register usage. */ |
| |
| /* Register allocation for our first guess |
| |
| r0 stack pointer |
| r1 scratch, target reg for xtrb? |
| r2-r7 arguments. |
| r8-r14 call saved |
| r15 link register |
| ap arg pointer (doesn't really exist, always eliminated) |
| c c bit |
| fp frame pointer (doesn't really exist, always eliminated) |
| x19 two control registers. */ |
| |
| /* 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. |
| |
| MCore has 16 integer registers and 2 control registers + the arg |
| pointer. */ |
| |
| #define FIRST_PSEUDO_REGISTER 20 |
| |
| #define R1_REG 1 /* Where literals are forced. */ |
| #define LK_REG 15 /* Overloaded on general register. */ |
| #define AP_REG 16 /* Fake arg pointer register. */ |
| /* RBE: mcore.md depends on CC_REG being set to 17. */ |
| #define CC_REG 17 /* Can't name it C_REG. */ |
| #define FP_REG 18 /* Fake frame pointer register. */ |
| |
| /* Specify the registers used for certain standard purposes. |
| The values of these macros are register numbers. */ |
| |
| |
| #undef PC_REGNUM /* Define this if the program counter is overloaded on a register. */ |
| #define STACK_POINTER_REGNUM 0 /* Register to use for pushing function arguments. */ |
| #define FRAME_POINTER_REGNUM 8 /* When we need FP, use r8. */ |
| |
| /* The assembler's names for the registers. RFP need not always be used as |
| the Real framepointer; it can also be used as a normal general register. |
| Note that the name `fp' is horribly misleading since `fp' is in fact only |
| the argument-and-return-context pointer. */ |
| #define REGISTER_NAMES \ |
| { \ |
| "sp", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ |
| "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ |
| "apvirtual", "c", "fpvirtual", "x19" \ |
| } |
| |
| /* 1 for registers that have pervasive standard uses |
| and are not available for the register allocator. */ |
| #define FIXED_REGISTERS \ |
| /* r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 ap c fp x19 */ \ |
| { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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. */ |
| |
| /* RBE: r15 {link register} not available across calls, |
| But we don't mark it that way here.... */ |
| #define CALL_USED_REGISTERS \ |
| /* r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 ap c fp x19 */ \ |
| { 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} |
| |
| /* The order in which register should be allocated. */ |
| #define REG_ALLOC_ORDER \ |
| /* r7 r6 r5 r4 r3 r2 r15 r14 r13 r12 r11 r10 r9 r8 r1 r0 ap c fp x19*/ \ |
| { 7, 6, 5, 4, 3, 2, 15, 14, 13, 12, 11, 10, 9, 8, 1, 0, 16, 17, 18, 19} |
| |
| /* 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. |
| |
| On the MCore regs are UNITS_PER_WORD bits wide; */ |
| #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. |
| We may keep double values in even registers. */ |
| #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
| ((TARGET_8ALIGN && GET_MODE_SIZE (MODE) > UNITS_PER_WORD) ? (((REGNO) & 1) == 0) : (REGNO < 18)) |
| |
| /* 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) || GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2)) |
| |
| /* 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. */ |
| #define FRAME_POINTER_REQUIRED 0 |
| |
| /* Definitions for register eliminations. |
| |
| We have two registers that can be eliminated on the MCore. 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. */ |
| |
| /* Base register for access to arguments of the function. */ |
| #define ARG_POINTER_REGNUM 16 |
| |
| /* Register in which the static-chain is passed to a function. */ |
| #define STATIC_CHAIN_REGNUM 1 |
| |
| /* 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. */ |
| #define ELIMINABLE_REGS \ |
| {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
| { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
| { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},} |
| |
| /* Given FROM and TO register numbers, say whether this elimination |
| is allowed. */ |
| #define CAN_ELIMINATE(FROM, TO) \ |
| (!((FROM) == FRAME_POINTER_REGNUM && FRAME_POINTER_REQUIRED)) |
| |
| /* 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 = mcore_initial_elimination_offset (FROM, TO) |
| |
| /* 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 MCore has only general registers. There are |
| also some special purpose registers: the T bit register, the |
| procedure Link and the Count Registers. */ |
| enum reg_class |
| { |
| NO_REGS, |
| ONLYR1_REGS, |
| LRW_REGS, |
| GENERAL_REGS, |
| C_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", \ |
| "ONLYR1_REGS", \ |
| "LRW_REGS", \ |
| "GENERAL_REGS", \ |
| "C_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. */ |
| |
| /* ??? STACK_POINTER_REGNUM should be excluded from LRW_REGS. */ |
| #define REG_CLASS_CONTENTS \ |
| { \ |
| {0x000000}, /* NO_REGS */ \ |
| {0x000002}, /* ONLYR1_REGS */ \ |
| {0x007FFE}, /* LRW_REGS */ \ |
| {0x01FFFF}, /* GENERAL_REGS */ \ |
| {0x020000}, /* C_REGS */ \ |
| {0x0FFFFF} /* 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. */ |
| |
| extern const int regno_reg_class[FIRST_PSEUDO_REGISTER]; |
| #define REGNO_REG_CLASS(REGNO) regno_reg_class[REGNO] |
| |
| /* 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 1 |
| |
| /* 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. */ |
| extern const enum reg_class reg_class_from_letter[]; |
| |
| #define REG_CLASS_FROM_LETTER(C) \ |
| (ISLOWER (C) ? reg_class_from_letter[(C) - 'a'] : NO_REGS) |
| |
| /* The letters I, J, K, L, M, N, O, and 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: loadable by movi (0..127) |
| J: arithmetic operand 1..32 |
| K: shift operand 0..31 |
| L: negative arithmetic operand -1..-32 |
| M: powers of two, constants loadable by bgeni |
| N: powers of two minus 1, constants loadable by bmaski, including -1 |
| O: allowed by cmov with two constants +/- 1 of each other |
| P: values we will generate 'inline' -- without an 'lrw' |
| |
| Others defined for use after reload |
| Q: constant 1 |
| R: a label |
| S: 0/1/2 cleared bits out of 32 [for bclri's] |
| T: 2 set bits out of 32 [for bseti's] |
| U: constant 0 |
| xxxS: 1 cleared bit out of 32 (complement of power of 2). for bclri |
| xxxT: 2 cleared bits out of 32. for pairs of bclris. */ |
| #define CONST_OK_FOR_I(VALUE) (((int)(VALUE)) >= 0 && ((int)(VALUE)) <= 0x7f) |
| #define CONST_OK_FOR_J(VALUE) (((int)(VALUE)) > 0 && ((int)(VALUE)) <= 32) |
| #define CONST_OK_FOR_L(VALUE) (((int)(VALUE)) < 0 && ((int)(VALUE)) >= -32) |
| #define CONST_OK_FOR_K(VALUE) (((int)(VALUE)) >= 0 && ((int)(VALUE)) <= 31) |
| #define CONST_OK_FOR_M(VALUE) (exact_log2 (VALUE) >= 0) |
| #define CONST_OK_FOR_N(VALUE) (((int)(VALUE)) == -1 || exact_log2 ((VALUE) + 1) >= 0) |
| #define CONST_OK_FOR_O(VALUE) (CONST_OK_FOR_I(VALUE) || \ |
| CONST_OK_FOR_M(VALUE) || \ |
| CONST_OK_FOR_N(VALUE) || \ |
| CONST_OK_FOR_M((int)(VALUE) - 1) || \ |
| CONST_OK_FOR_N((int)(VALUE) + 1)) |
| |
| #define CONST_OK_FOR_P(VALUE) (mcore_const_ok_for_inline (VALUE)) |
| |
| #define CONST_OK_FOR_LETTER_P(VALUE, C) \ |
| ((C) == 'I' ? CONST_OK_FOR_I (VALUE) \ |
| : (C) == 'J' ? CONST_OK_FOR_J (VALUE) \ |
| : (C) == 'L' ? CONST_OK_FOR_L (VALUE) \ |
| : (C) == 'K' ? CONST_OK_FOR_K (VALUE) \ |
| : (C) == 'M' ? CONST_OK_FOR_M (VALUE) \ |
| : (C) == 'N' ? CONST_OK_FOR_N (VALUE) \ |
| : (C) == 'P' ? CONST_OK_FOR_P (VALUE) \ |
| : (C) == 'O' ? CONST_OK_FOR_O (VALUE) \ |
| : 0) |
| |
| /* 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) \ |
| ((C) == 'G' ? CONST_OK_FOR_I (CONST_DOUBLE_HIGH (VALUE)) \ |
| && CONST_OK_FOR_I (CONST_DOUBLE_LOW (VALUE)) \ |
| : 0) |
| |
| /* Letters in the range `Q' through `U' in a register constraint string |
| may be defined in a machine-dependent fashion to stand for arbitrary |
| operand types. */ |
| #define EXTRA_CONSTRAINT(OP, C) \ |
| ((C) == 'R' ? (GET_CODE (OP) == MEM \ |
| && GET_CODE (XEXP (OP, 0)) == LABEL_REF) \ |
| : (C) == 'S' ? (GET_CODE (OP) == CONST_INT \ |
| && mcore_num_zeros (INTVAL (OP)) <= 2) \ |
| : (C) == 'T' ? (GET_CODE (OP) == CONST_INT \ |
| && mcore_num_ones (INTVAL (OP)) == 2) \ |
| : (C) == 'Q' ? (GET_CODE (OP) == CONST_INT \ |
| && INTVAL(OP) == 1) \ |
| : (C) == 'U' ? (GET_CODE (OP) == CONST_INT \ |
| && INTVAL(OP) == 0) \ |
| : 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) mcore_reload_class (X, CLASS) |
| |
| /* Return the register class of a scratch register needed to copy IN into |
| or out of a register in CLASS in MODE. If it can be done directly, |
| NO_REGS is returned. */ |
| #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ |
| mcore_secondary_reload_class (CLASS, MODE, X) |
| |
| /* Return the maximum number of consecutive registers |
| needed to represent mode MODE in a register of class CLASS. |
| |
| On MCore this is the size of MODE in words. */ |
| #define CLASS_MAX_NREGS(CLASS, MODE) \ |
| (ROUND_ADVANCE (GET_MODE_SIZE (MODE))) |
| |
| /* Stack layout; function entry, exit and calling. */ |
| |
| /* Define the number of register that can hold parameters. |
| These two macros are used only in other macro definitions below. */ |
| #define NPARM_REGS 6 |
| #define FIRST_PARM_REG 2 |
| #define FIRST_RET_REG 2 |
| |
| /* Define this if pushing a word on the stack |
| makes the stack pointer a smaller address. */ |
| #define STACK_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 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 |
| |
| /* Offset of first parameter from the argument pointer register value. */ |
| #define FIRST_PARM_OFFSET(FNDECL) 0 |
| |
| /* Value is the number of byte 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 MCore, the callee does not pop any of its arguments that were passed |
| on the stack. */ |
| #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0 |
| |
| /* 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) mcore_function_value (VALTYPE, FUNC) |
| |
| /* Don't default to pcc-struct-return, because gcc is the only compiler, and |
| we want to retain compatibility with older gcc versions. */ |
| #define DEFAULT_PCC_STRUCT_RETURN 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, FIRST_RET_REG) |
| |
| /* 1 if N is a possible register number for a function value. |
| On the MCore, only r4 can return results. */ |
| #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == FIRST_RET_REG) |
| |
| /* 1 if N is a possible register number for function argument passing. */ |
| #define FUNCTION_ARG_REGNO_P(REGNO) \ |
| ((REGNO) >= FIRST_PARM_REG && (REGNO) < (NPARM_REGS + FIRST_PARM_REG)) |
| |
| /* 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 MCore, this is a single integer, which is a number of words |
| of arguments scanned so far (including the invisible argument, |
| if any, which holds the structure-value-address). |
| Thus NARGREGS or more means all following args should go on the stack. */ |
| #define CUMULATIVE_ARGS int |
| |
| #define ROUND_ADVANCE(SIZE) \ |
| ((SIZE + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
| |
| /* Round a register number up to a proper boundary for an arg of mode |
| MODE. |
| |
| We round to an even reg for things larger than a word. */ |
| #define ROUND_REG(X, MODE) \ |
| ((TARGET_8ALIGN \ |
| && GET_MODE_UNIT_SIZE ((MODE)) > UNITS_PER_WORD) \ |
| ? ((X) + ((X) & 1)) : (X)) |
| |
| |
| /* 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 MCore, the offset always starts at 0: the first parm reg is always |
| the same reg. */ |
| #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
| ((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) = (ROUND_REG ((CUM), (MODE)) \ |
| + ((NAMED) * mcore_num_arg_regs (MODE, TYPE)))) \ |
| |
| /* Define where to put the arguments to a function. */ |
| #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ |
| mcore_function_arg (CUM, MODE, TYPE, NAMED) |
| |
| /* Call the function profiler with a given profile label. */ |
| #define FUNCTION_PROFILER(STREAM,LABELNO) \ |
| { \ |
| fprintf (STREAM, " trap 1\n"); \ |
| fprintf (STREAM, " .align 2\n"); \ |
| fprintf (STREAM, " .long LP%d\n", (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 |
| |
| /* Output assembler code for a block containing the constant parts |
| of a trampoline, leaving space for the variable parts. |
| |
| On the MCore, the trampoline looks like: |
| lrw r1, function |
| lrw r13, area |
| jmp r13 |
| or r0, r0 |
| .literals */ |
| #define TRAMPOLINE_TEMPLATE(FILE) \ |
| { \ |
| fprintf ((FILE), " .short 0x7102\n"); \ |
| fprintf ((FILE), " .short 0x7d02\n"); \ |
| fprintf ((FILE), " .short 0x00cd\n"); \ |
| fprintf ((FILE), " .short 0x1e00\n"); \ |
| fprintf ((FILE), " .long 0\n"); \ |
| fprintf ((FILE), " .long 0\n"); \ |
| } |
| |
| /* Length in units of the trampoline for entering a nested function. */ |
| #define TRAMPOLINE_SIZE 12 |
| |
| /* Alignment required for a trampoline in bits. */ |
| #define TRAMPOLINE_ALIGNMENT 32 |
| |
| /* 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) \ |
| { \ |
| emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 8)), \ |
| (CXT)); \ |
| emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 12)), \ |
| (FNADDR)); \ |
| } |
| |
| /* 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) \ |
| ((REGNO) < AP_REG || (unsigned) reg_renumber[(REGNO)] < AP_REG) |
| |
| #define REGNO_OK_FOR_INDEX_P(REGNO) 0 |
| |
| /* 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) (GET_CODE (X) == LABEL_REF) |
| |
| /* Nonzero if the constant value X is a legitimate general operand. |
| It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. |
| |
| On the MCore, allow anything but a 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. */ |
| #ifndef REG_OK_STRICT |
| |
| /* 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) \ |
| (REGNO (X) <= 16 || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
| |
| /* 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 |
| |
| #else |
| |
| /* 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)) |
| |
| /* Nonzero if X is a hard reg that can be used as an index. */ |
| #define REG_OK_FOR_INDEX_P(X) 0 |
| |
| #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. */ |
| #define BASE_REGISTER_RTX_P(X) \ |
| (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) |
| |
| #define INDEX_REGISTER_RTX_P(X) \ |
| (GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X)) |
| |
| |
| /* Jump to LABEL if X is a valid address RTX. This must also take |
| REG_OK_STRICT into account when deciding about valid registers, but it uses |
| the above macros so we are in luck. |
| |
| Allow REG |
| REG+disp |
| |
| A legitimate index for a QI is 0..15, for HI is 0..30, for SI is 0..60, |
| and for DI is 0..56 because we use two SI loads, etc. */ |
| #define GO_IF_LEGITIMATE_INDEX(MODE, REGNO, OP, LABEL) \ |
| do \ |
| { \ |
| if (GET_CODE (OP) == CONST_INT) \ |
| { \ |
| if (GET_MODE_SIZE (MODE) >= 4 \ |
| && (((unsigned)INTVAL (OP)) % 4) == 0 \ |
| && ((unsigned)INTVAL (OP)) <= 64 - GET_MODE_SIZE (MODE)) \ |
| goto LABEL; \ |
| if (GET_MODE_SIZE (MODE) == 2 \ |
| && (((unsigned)INTVAL (OP)) % 2) == 0 \ |
| && ((unsigned)INTVAL (OP)) <= 30) \ |
| goto LABEL; \ |
| if (GET_MODE_SIZE (MODE) == 1 \ |
| && ((unsigned)INTVAL (OP)) <= 15) \ |
| goto LABEL; \ |
| } \ |
| } \ |
| while (0) |
| |
| #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ |
| { \ |
| if (BASE_REGISTER_RTX_P (X)) \ |
| goto LABEL; \ |
| else if (GET_CODE (X) == PLUS || GET_CODE (X) == LO_SUM) \ |
| { \ |
| rtx xop0 = XEXP (X,0); \ |
| rtx xop1 = XEXP (X,1); \ |
| if (BASE_REGISTER_RTX_P (xop0)) \ |
| GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop0), xop1, LABEL); \ |
| if (BASE_REGISTER_RTX_P (xop1)) \ |
| GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop1), xop0, LABEL); \ |
| } \ |
| } |
| |
| /* 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 || GET_CODE (ADDR) == POST_DEC \ |
| || GET_CODE (ADDR) == PRE_INC || GET_CODE (ADDR) == POST_INC) \ |
| goto LABEL; \ |
| } |
| |
| /* Specify the machine mode that this machine uses |
| for the index in the tablejump instruction. */ |
| #define CASE_VECTOR_MODE SImode |
| |
| /* 'char' is signed by default. */ |
| #define DEFAULT_SIGNED_CHAR 0 |
| |
| /* The type of size_t unsigned int. */ |
| #define SIZE_TYPE "unsigned int" |
| |
| /* Max number of bytes we can move from memory to memory |
| in one reasonably fast instruction. */ |
| #define MOVE_MAX 4 |
| |
| /* 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 |
| |
| /* Nonzero if access to memory by bytes is slow and undesirable. */ |
| #define SLOW_BYTE_ACCESS TARGET_SLOW_BYTES |
| |
| /* Shift counts are truncated to 6-bits (0 to 63) instead of the expected |
| 5-bits, so we can not define SHIFT_COUNT_TRUNCATED to true for this |
| target. */ |
| #define SHIFT_COUNT_TRUNCATED 0 |
| |
| /* All integers have the same format so truncation is easy. */ |
| #define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC) 1 |
| |
| /* 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. */ |
| /* Why is this defined??? -- dac */ |
| #define NO_FUNCTION_CSE 1 |
| |
| /* The machine modes of pointers and functions. */ |
| #define Pmode SImode |
| #define FUNCTION_MODE Pmode |
| |
| /* Compute extra cost of moving data between one register class |
| and another. All register moves are cheap. */ |
| #define REGISTER_MOVE_COST(MODE, SRCCLASS, DSTCLASS) 2 |
| |
| #define WORD_REGISTER_OPERATIONS |
| |
| /* Assembler output control. */ |
| #define ASM_COMMENT_START "\t//" |
| |
| #define ASM_APP_ON "// inline asm begin\n" |
| #define ASM_APP_OFF "// inline asm end\n" |
| |
| #define FILE_ASM_OP "\t.file\n" |
| |
| /* Switch to the text or data segment. */ |
| #define TEXT_SECTION_ASM_OP "\t.text" |
| #define DATA_SECTION_ASM_OP "\t.data" |
| |
| /* Switch into a generic section. */ |
| #undef TARGET_ASM_NAMED_SECTION |
| #define TARGET_ASM_NAMED_SECTION mcore_asm_named_section |
| |
| /* 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, "\tsubi\t %s,%d\n\tstw\t %s,(%s)\n", \ |
| reg_names[STACK_POINTER_REGNUM], \ |
| (STACK_BOUNDARY / BITS_PER_UNIT), \ |
| reg_names[REGNO], \ |
| reg_names[STACK_POINTER_REGNUM]) |
| |
| /* Length in instructions of the code output by ASM_OUTPUT_REG_PUSH. */ |
| #define REG_PUSH_LENGTH 2 |
| |
| /* This is how to output an insn to pop a register from the stack. */ |
| #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ |
| fprintf (FILE, "\tldw\t %s,(%s)\n\taddi\t %s,%d\n", \ |
| reg_names[REGNO], \ |
| reg_names[STACK_POINTER_REGNUM], \ |
| reg_names[STACK_POINTER_REGNUM], \ |
| (STACK_BOUNDARY / BITS_PER_UNIT)) |
| |
| |
| /* Output a reference to a label. */ |
| #undef ASM_OUTPUT_LABELREF |
| #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ |
| fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \ |
| (* targetm.strip_name_encoding) (NAME)) |
| |
| /* 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\t%d\n", LOG) |
| |
| #ifndef ASM_DECLARE_RESULT |
| #define ASM_DECLARE_RESULT(FILE, RESULT) |
| #endif |
| |
| #define MULTIPLE_SYMBOL_SPACES 1 |
| |
| #define SUPPORTS_ONE_ONLY 1 |
| |
| /* A pair of macros to output things for the callgraph data. |
| VALUE means (to the tools that reads this info later): |
| 0 a call from src to dst |
| 1 the call is special (e.g. dst is "unknown" or "alloca") |
| 2 the call is special (e.g., the src is a table instead of routine) |
| |
| Frame sizes are augmented with timestamps to help later tools |
| differentiate between static entities with same names in different |
| files. */ |
| extern long mcore_current_compilation_timestamp; |
| #define ASM_OUTPUT_CG_NODE(FILE,SRCNAME,VALUE) \ |
| do \ |
| { \ |
| if (mcore_current_compilation_timestamp == 0) \ |
| mcore_current_compilation_timestamp = time (0); \ |
| fprintf ((FILE),"\t.equ\t__$frame$size$_%s_$_%08lx,%d\n", \ |
| (SRCNAME), mcore_current_compilation_timestamp, (VALUE)); \ |
| } \ |
| while (0) |
| |
| #define ASM_OUTPUT_CG_EDGE(FILE,SRCNAME,DSTNAME,VALUE) \ |
| do \ |
| { \ |
| fprintf ((FILE),"\t.equ\t__$function$call$_%s_$_%s,%d\n", \ |
| (SRCNAME), (DSTNAME), (VALUE)); \ |
| } \ |
| while (0) |
| |
| /* Globalizing directive for a label. */ |
| #define GLOBAL_ASM_OP "\t.export\t" |
| |
| /* The prefix to add to user-visible assembler symbols. */ |
| #undef USER_LABEL_PREFIX |
| #define USER_LABEL_PREFIX "" |
| |
| /* Make an internal label into a string. */ |
| #undef ASM_GENERATE_INTERNAL_LABEL |
| #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \ |
| sprintf (STRING, "*.%s%ld", PREFIX, (long) NUM) |
| |
| /* Jump tables must be 32 bit aligned. */ |
| #undef ASM_OUTPUT_CASE_LABEL |
| #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE) \ |
| fprintf (STREAM, "\t.align 2\n.%s%d:\n", PREFIX, NUM); |
| |
| /* Output a relative address. Not needed since jump tables are absolute |
| but we must define it anyway. */ |
| #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL) \ |
| fputs ("- - - ASM_OUTPUT_ADDR_DIFF_ELT called!\n", STREAM) |
| |
| /* Output an element of a dispatch table. */ |
| #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE) \ |
| fprintf (STREAM, "\t.long\t.L%d\n", VALUE) |
| |
| /* Output various types of constants. */ |
| |
| /* This is how to output an assembler line |
| that says to advance the location counter by SIZE bytes. */ |
| #undef ASM_OUTPUT_SKIP |
| #define ASM_OUTPUT_SKIP(FILE,SIZE) \ |
| fprintf (FILE, "\t.fill %d, 1\n", (int)(SIZE)) |
| |
| /* This says how to output an assembler line |
| to define a global common symbol, with alignment information. */ |
| /* XXX - for now we ignore the alignment. */ |
| #undef ASM_OUTPUT_ALIGNED_COMMON |
| #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ |
| do \ |
| { \ |
| if (mcore_dllexport_name_p (NAME)) \ |
| MCORE_EXPORT_NAME (FILE, NAME) \ |
| if (! mcore_dllimport_name_p (NAME)) \ |
| { \ |
| fputs ("\t.comm\t", FILE); \ |
| assemble_name (FILE, NAME); \ |
| fprintf (FILE, ",%lu\n", (unsigned long)(SIZE)); \ |
| } \ |
| } \ |
| while (0) |
| |
| /* This says how to output an assembler line |
| to define a local common symbol.... */ |
| #undef ASM_OUTPUT_LOCAL |
| #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ |
| (fputs ("\t.lcomm\t", FILE), \ |
| assemble_name (FILE, NAME), \ |
| fprintf (FILE, ",%d\n", (int)SIZE)) |
| |
| /* ... and how to define a local common symbol whose alignment |
| we wish to specify. ALIGN comes in as bits, we have to turn |
| it into bytes. */ |
| #undef ASM_OUTPUT_ALIGNED_LOCAL |
| #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ |
| do \ |
| { \ |
| fputs ("\t.bss\t", (FILE)); \ |
| assemble_name ((FILE), (NAME)); \ |
| fprintf ((FILE), ",%d,%d\n", (int)(SIZE), (ALIGN) / BITS_PER_UNIT);\ |
| } \ |
| while (0) |
| |
| /* 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(STREAM, X, CODE) mcore_print_operand (STREAM, X, CODE) |
| |
| /* Print a memory address as an operand to reference that memory location. */ |
| #define PRINT_OPERAND_ADDRESS(STREAM,X) mcore_print_operand_address (STREAM, X) |
| |
| #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ |
| ((CHAR)=='.' || (CHAR) == '#' || (CHAR) == '*' || (CHAR) == '^' || (CHAR) == '!') |
| |
| #endif /* ! GCC_MCORE_H */ |