| /* Definitions of target machine for GNU compiler, for DEC Alpha. |
| Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 2000, 2001, 2002, 2004, 2005 Free Software Foundation, Inc. |
| Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) |
| |
| 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. */ |
| |
| /* Target CPU builtins. */ |
| #define TARGET_CPU_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__alpha"); \ |
| builtin_define ("__alpha__"); \ |
| builtin_assert ("cpu=alpha"); \ |
| builtin_assert ("machine=alpha"); \ |
| if (TARGET_CIX) \ |
| { \ |
| builtin_define ("__alpha_cix__"); \ |
| builtin_assert ("cpu=cix"); \ |
| } \ |
| if (TARGET_FIX) \ |
| { \ |
| builtin_define ("__alpha_fix__"); \ |
| builtin_assert ("cpu=fix"); \ |
| } \ |
| if (TARGET_BWX) \ |
| { \ |
| builtin_define ("__alpha_bwx__"); \ |
| builtin_assert ("cpu=bwx"); \ |
| } \ |
| if (TARGET_MAX) \ |
| { \ |
| builtin_define ("__alpha_max__"); \ |
| builtin_assert ("cpu=max"); \ |
| } \ |
| if (alpha_cpu == PROCESSOR_EV6) \ |
| { \ |
| builtin_define ("__alpha_ev6__"); \ |
| builtin_assert ("cpu=ev6"); \ |
| } \ |
| else if (alpha_cpu == PROCESSOR_EV5) \ |
| { \ |
| builtin_define ("__alpha_ev5__"); \ |
| builtin_assert ("cpu=ev5"); \ |
| } \ |
| else /* Presumably ev4. */ \ |
| { \ |
| builtin_define ("__alpha_ev4__"); \ |
| builtin_assert ("cpu=ev4"); \ |
| } \ |
| if (TARGET_IEEE || TARGET_IEEE_WITH_INEXACT) \ |
| builtin_define ("_IEEE_FP"); \ |
| if (TARGET_IEEE_WITH_INEXACT) \ |
| builtin_define ("_IEEE_FP_INEXACT"); \ |
| if (TARGET_LONG_DOUBLE_128) \ |
| builtin_define ("__LONG_DOUBLE_128__"); \ |
| \ |
| /* Macros dependent on the C dialect. */ \ |
| SUBTARGET_LANGUAGE_CPP_BUILTINS(); \ |
| } while (0) |
| |
| #ifndef SUBTARGET_LANGUAGE_CPP_BUILTINS |
| #define SUBTARGET_LANGUAGE_CPP_BUILTINS() \ |
| do \ |
| { \ |
| if (preprocessing_asm_p ()) \ |
| builtin_define_std ("LANGUAGE_ASSEMBLY"); \ |
| else if (c_dialect_cxx ()) \ |
| { \ |
| builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \ |
| builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \ |
| } \ |
| else \ |
| builtin_define_std ("LANGUAGE_C"); \ |
| if (c_dialect_objc ()) \ |
| { \ |
| builtin_define ("__LANGUAGE_OBJECTIVE_C"); \ |
| builtin_define ("__LANGUAGE_OBJECTIVE_C__"); \ |
| } \ |
| } \ |
| while (0) |
| #endif |
| |
| #define CPP_SPEC "%(cpp_subtarget)" |
| |
| #ifndef CPP_SUBTARGET_SPEC |
| #define CPP_SUBTARGET_SPEC "" |
| #endif |
| |
| #define WORD_SWITCH_TAKES_ARG(STR) \ |
| (!strcmp (STR, "rpath") || DEFAULT_WORD_SWITCH_TAKES_ARG(STR)) |
| |
| /* Print subsidiary information on the compiler version in use. */ |
| #define TARGET_VERSION |
| |
| /* Run-time compilation parameters selecting different hardware subsets. */ |
| |
| /* Which processor to schedule for. The cpu attribute defines a list that |
| mirrors this list, so changes to alpha.md must be made at the same time. */ |
| |
| enum processor_type |
| { |
| PROCESSOR_EV4, /* 2106[46]{a,} */ |
| PROCESSOR_EV5, /* 21164{a,pc,} */ |
| PROCESSOR_EV6, /* 21264 */ |
| PROCESSOR_MAX |
| }; |
| |
| extern enum processor_type alpha_cpu; |
| extern enum processor_type alpha_tune; |
| |
| enum alpha_trap_precision |
| { |
| ALPHA_TP_PROG, /* No precision (default). */ |
| ALPHA_TP_FUNC, /* Trap contained within originating function. */ |
| ALPHA_TP_INSN /* Instruction accuracy and code is resumption safe. */ |
| }; |
| |
| enum alpha_fp_rounding_mode |
| { |
| ALPHA_FPRM_NORM, /* Normal rounding mode. */ |
| ALPHA_FPRM_MINF, /* Round towards minus-infinity. */ |
| ALPHA_FPRM_CHOP, /* Chopped rounding mode (towards 0). */ |
| ALPHA_FPRM_DYN /* Dynamic rounding mode. */ |
| }; |
| |
| enum alpha_fp_trap_mode |
| { |
| ALPHA_FPTM_N, /* Normal trap mode. */ |
| ALPHA_FPTM_U, /* Underflow traps enabled. */ |
| ALPHA_FPTM_SU, /* Software completion, w/underflow traps */ |
| ALPHA_FPTM_SUI /* Software completion, w/underflow & inexact traps */ |
| }; |
| |
| extern int target_flags; |
| |
| extern enum alpha_trap_precision alpha_tp; |
| extern enum alpha_fp_rounding_mode alpha_fprm; |
| extern enum alpha_fp_trap_mode alpha_fptm; |
| |
| /* Invert the easy way to make options work. */ |
| #define TARGET_FP (!TARGET_SOFT_FP) |
| |
| /* These are for target os support and cannot be changed at runtime. */ |
| #define TARGET_ABI_WINDOWS_NT 0 |
| #define TARGET_ABI_OPEN_VMS 0 |
| #define TARGET_ABI_UNICOSMK 0 |
| #define TARGET_ABI_OSF (!TARGET_ABI_WINDOWS_NT \ |
| && !TARGET_ABI_OPEN_VMS \ |
| && !TARGET_ABI_UNICOSMK) |
| |
| #ifndef TARGET_AS_CAN_SUBTRACT_LABELS |
| #define TARGET_AS_CAN_SUBTRACT_LABELS TARGET_GAS |
| #endif |
| #ifndef TARGET_AS_SLASH_BEFORE_SUFFIX |
| #define TARGET_AS_SLASH_BEFORE_SUFFIX TARGET_GAS |
| #endif |
| #ifndef TARGET_CAN_FAULT_IN_PROLOGUE |
| #define TARGET_CAN_FAULT_IN_PROLOGUE 0 |
| #endif |
| #ifndef TARGET_HAS_XFLOATING_LIBS |
| #define TARGET_HAS_XFLOATING_LIBS TARGET_LONG_DOUBLE_128 |
| #endif |
| #ifndef TARGET_PROFILING_NEEDS_GP |
| #define TARGET_PROFILING_NEEDS_GP 0 |
| #endif |
| #ifndef TARGET_LD_BUGGY_LDGP |
| #define TARGET_LD_BUGGY_LDGP 0 |
| #endif |
| #ifndef TARGET_FIXUP_EV5_PREFETCH |
| #define TARGET_FIXUP_EV5_PREFETCH 0 |
| #endif |
| #ifndef HAVE_AS_TLS |
| #define HAVE_AS_TLS 0 |
| #endif |
| |
| #define TARGET_DEFAULT MASK_FPREGS |
| |
| #ifndef TARGET_CPU_DEFAULT |
| #define TARGET_CPU_DEFAULT 0 |
| #endif |
| |
| #ifndef TARGET_DEFAULT_EXPLICIT_RELOCS |
| #ifdef HAVE_AS_EXPLICIT_RELOCS |
| #define TARGET_DEFAULT_EXPLICIT_RELOCS MASK_EXPLICIT_RELOCS |
| #define TARGET_SUPPORT_ARCH 1 |
| #else |
| #define TARGET_DEFAULT_EXPLICIT_RELOCS 0 |
| #endif |
| #endif |
| |
| #ifndef TARGET_SUPPORT_ARCH |
| #define TARGET_SUPPORT_ARCH 0 |
| #endif |
| |
| /* Support for a compile-time default CPU, et cetera. The rules are: |
| --with-cpu is ignored if -mcpu is specified. |
| --with-tune is ignored if -mtune is specified. */ |
| #define OPTION_DEFAULT_SPECS \ |
| {"cpu", "%{!mcpu=*:-mcpu=%(VALUE)}" }, \ |
| {"tune", "%{!mtune=*:-mtune=%(VALUE)}" } |
| |
| /* This macro defines names of additional specifications to put in the |
| specs that can be used in various specifications like CC1_SPEC. Its |
| definition is an initializer with a subgrouping for each command option. |
| |
| Each subgrouping contains a string constant, that defines the |
| specification name, and a string constant that used by the GCC driver |
| program. |
| |
| Do not define this macro if it does not need to do anything. */ |
| |
| #ifndef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS |
| #endif |
| |
| #define EXTRA_SPECS \ |
| { "cpp_subtarget", CPP_SUBTARGET_SPEC }, \ |
| SUBTARGET_EXTRA_SPECS |
| |
| |
| /* 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. |
| |
| On the Alpha, it is used to translate target-option strings into |
| numeric values. */ |
| |
| #define OVERRIDE_OPTIONS override_options () |
| |
| |
| /* Define this macro to change register usage conditional on target flags. |
| |
| On the Alpha, we use this to disable the floating-point registers when |
| they don't exist. */ |
| |
| #define CONDITIONAL_REGISTER_USAGE \ |
| { \ |
| int i; \ |
| if (! TARGET_FPREGS) \ |
| for (i = 32; i < 63; i++) \ |
| fixed_regs[i] = call_used_regs[i] = 1; \ |
| } |
| |
| |
| /* Show we can debug even without a frame pointer. */ |
| #define CAN_DEBUG_WITHOUT_FP |
| |
| /* target machine storage layout */ |
| |
| /* Define the size of `int'. The default is the same as the word size. */ |
| #define INT_TYPE_SIZE 32 |
| |
| /* Define the size of `long long'. The default is the twice the word size. */ |
| #define LONG_LONG_TYPE_SIZE 64 |
| |
| /* We're IEEE unless someone says to use VAX. */ |
| #define TARGET_FLOAT_FORMAT \ |
| (TARGET_FLOAT_VAX ? VAX_FLOAT_FORMAT : IEEE_FLOAT_FORMAT) |
| |
| /* The two floating-point formats we support are S-floating, which is |
| 4 bytes, and T-floating, which is 8 bytes. `float' is S and `double' |
| and `long double' are T. */ |
| |
| #define FLOAT_TYPE_SIZE 32 |
| #define DOUBLE_TYPE_SIZE 64 |
| #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) |
| |
| /* Define this to set long double type size to use in libgcc2.c, which can |
| not depend on target_flags. */ |
| #ifdef __LONG_DOUBLE_128__ |
| #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 |
| #else |
| #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 |
| #endif |
| |
| /* Work around target_flags dependency in ada/targtyps.c. */ |
| #define WIDEST_HARDWARE_FP_SIZE 64 |
| |
| #define WCHAR_TYPE "unsigned int" |
| #define WCHAR_TYPE_SIZE 32 |
| |
| /* 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. |
| |
| For Alpha, we always store objects in a full register. 32-bit integers |
| are always sign-extended, but smaller objects retain their signedness. |
| |
| Note that small vector types can get mapped onto integer modes at the |
| whim of not appearing in alpha-modes.def. We never promoted these |
| values before; don't do so now that we've trimmed the set of modes to |
| those actually implemented in the backend. */ |
| |
| #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ |
| if (GET_MODE_CLASS (MODE) == MODE_INT \ |
| && (TYPE == NULL || TREE_CODE (TYPE) != VECTOR_TYPE) \ |
| && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ |
| { \ |
| if ((MODE) == SImode) \ |
| (UNSIGNEDP) = 0; \ |
| (MODE) = DImode; \ |
| } |
| |
| /* Define this if most significant bit is lowest numbered |
| in instructions that operate on numbered bit-fields. |
| |
| There are no such instructions on the Alpha, but the documentation |
| is little endian. */ |
| #define BITS_BIG_ENDIAN 0 |
| |
| /* Define this if most significant byte of a word is the lowest numbered. |
| This is false on the Alpha. */ |
| #define BYTES_BIG_ENDIAN 0 |
| |
| /* Define this if most significant word of a multiword number is lowest |
| numbered. |
| |
| For Alpha we can decide arbitrarily since there are no machine instructions |
| for them. Might as well be consistent with bytes. */ |
| #define WORDS_BIG_ENDIAN 0 |
| |
| /* Width of a word, in units (bytes). */ |
| #define UNITS_PER_WORD 8 |
| |
| /* Width in bits of a pointer. |
| See also the macro `Pmode' defined below. */ |
| #define POINTER_SIZE 64 |
| |
| /* Allocation boundary (in *bits*) for storing arguments in argument list. */ |
| #define PARM_BOUNDARY 64 |
| |
| /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
| #define STACK_BOUNDARY 128 |
| |
| /* 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 64 |
| |
| /* 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. */ |
| #define BIGGEST_ALIGNMENT 128 |
| |
| /* For atomic access to objects, must have at least 32-bit alignment |
| unless the machine has byte operations. */ |
| #define MINIMUM_ATOMIC_ALIGNMENT ((unsigned int) (TARGET_BWX ? 8 : 32)) |
| |
| /* Align all constants and variables to at least a word boundary so |
| we can pick up pieces of them faster. */ |
| /* ??? Only if block-move stuff knows about different source/destination |
| alignment. */ |
| #if 0 |
| #define CONSTANT_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) |
| #define DATA_ALIGNMENT(EXP, ALIGN) MAX ((ALIGN), BITS_PER_WORD) |
| #endif |
| |
| /* Set this nonzero if move instructions will actually fail to work |
| when given unaligned data. |
| |
| Since we get an error message when we do one, call them invalid. */ |
| |
| #define STRICT_ALIGNMENT 1 |
| |
| /* Set this nonzero if unaligned move instructions are extremely slow. |
| |
| On the Alpha, they trap. */ |
| |
| #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1 |
| |
| /* Standard register usage. */ |
| |
| /* Number of actual hardware registers. |
| The hardware registers are assigned numbers for the compiler |
| from 0 to just below FIRST_PSEUDO_REGISTER. |
| All registers that the compiler knows about must be given numbers, |
| even those that are not normally considered general registers. |
| |
| We define all 32 integer registers, even though $31 is always zero, |
| and all 32 floating-point registers, even though $f31 is also |
| always zero. We do not bother defining the FP status register and |
| there are no other registers. |
| |
| Since $31 is always zero, we will use register number 31 as the |
| argument pointer. It will never appear in the generated code |
| because we will always be eliminating it in favor of the stack |
| pointer or hardware frame pointer. |
| |
| Likewise, we use $f31 for the frame pointer, which will always |
| be eliminated in favor of the hardware frame pointer or the |
| stack pointer. */ |
| |
| #define FIRST_PSEUDO_REGISTER 64 |
| |
| /* 1 for registers that have pervasive standard uses |
| and are not available for the register allocator. */ |
| |
| #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, 0, 0, 1, 1, 1, \ |
| 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, 0, 0, 0, 0, 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, 0, 0, 0, 0, 0, 0, 0, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 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 } |
| |
| /* List the order in which to allocate registers. Each register must be |
| listed once, even those in FIXED_REGISTERS. */ |
| |
| #define REG_ALLOC_ORDER { \ |
| 1, 2, 3, 4, 5, 6, 7, 8, /* nonsaved integer registers */ \ |
| 22, 23, 24, 25, 28, /* likewise */ \ |
| 0, /* likewise, but return value */ \ |
| 21, 20, 19, 18, 17, 16, /* likewise, but input args */ \ |
| 27, /* likewise, but OSF procedure value */ \ |
| \ |
| 42, 43, 44, 45, 46, 47, /* nonsaved floating-point registers */ \ |
| 54, 55, 56, 57, 58, 59, /* likewise */ \ |
| 60, 61, 62, /* likewise */ \ |
| 32, 33, /* likewise, but return values */ \ |
| 53, 52, 51, 50, 49, 48, /* likewise, but input args */ \ |
| \ |
| 9, 10, 11, 12, 13, 14, /* saved integer registers */ \ |
| 26, /* return address */ \ |
| 15, /* hard frame pointer */ \ |
| \ |
| 34, 35, 36, 37, 38, 39, /* saved floating-point registers */ \ |
| 40, 41, /* likewise */ \ |
| \ |
| 29, 30, 31, 63 /* gp, sp, ap, sfp */ \ |
| } |
| |
| /* 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. |
| On Alpha, the integer registers can hold any mode. The floating-point |
| registers can hold 64-bit integers as well, but not smaller values. */ |
| |
| #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
| ((REGNO) >= 32 && (REGNO) <= 62 \ |
| ? (MODE) == SFmode || (MODE) == DFmode || (MODE) == DImode \ |
| || (MODE) == SCmode || (MODE) == DCmode \ |
| : 1) |
| |
| /* A C expression that is nonzero if a value of mode |
| MODE1 is accessible in mode MODE2 without copying. |
| |
| This asymmetric test is true when MODE1 could be put |
| in an FP register but MODE2 could not. */ |
| |
| #define MODES_TIEABLE_P(MODE1, MODE2) \ |
| (HARD_REGNO_MODE_OK (32, (MODE1)) \ |
| ? HARD_REGNO_MODE_OK (32, (MODE2)) \ |
| : 1) |
| |
| /* Specify the registers used for certain standard purposes. |
| The values of these macros are register numbers. */ |
| |
| /* Alpha pc isn't overloaded on a register that the compiler knows about. */ |
| /* #define PC_REGNUM */ |
| |
| /* Register to use for pushing function arguments. */ |
| #define STACK_POINTER_REGNUM 30 |
| |
| /* Base register for access to local variables of the function. */ |
| #define HARD_FRAME_POINTER_REGNUM 15 |
| |
| /* Value should be nonzero if functions must have frame pointers. |
| Zero means the frame pointer need not be set up (and parms |
| may be accessed via the stack pointer) in functions that seem suitable. |
| This is computed in `reload', in reload1.c. */ |
| #define FRAME_POINTER_REQUIRED 0 |
| |
| /* Base register for access to arguments of the function. */ |
| #define ARG_POINTER_REGNUM 31 |
| |
| /* Base register for access to local variables of function. */ |
| #define FRAME_POINTER_REGNUM 63 |
| |
| /* Register in which static-chain is passed to a function. |
| |
| For the Alpha, this is based on an example; the calling sequence |
| doesn't seem to specify this. */ |
| #define STATIC_CHAIN_REGNUM 1 |
| |
| /* The register number of the register used to address a table of |
| static data addresses in memory. */ |
| #define PIC_OFFSET_TABLE_REGNUM 29 |
| |
| /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' |
| is clobbered by calls. */ |
| /* ??? It is and it isn't. It's required to be valid for a given |
| function when the function returns. It isn't clobbered by |
| current_file functions. Moreover, we do not expose the ldgp |
| until after reload, so we're probably safe. */ |
| /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */ |
| |
| /* 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, R0_REG, R24_REG, R25_REG, R27_REG, |
| GENERAL_REGS, FLOAT_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", "R0_REG", "R24_REG", "R25_REG", "R27_REG", \ |
| "GENERAL_REGS", "FLOAT_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 \ |
| { {0x00000000, 0x00000000}, /* NO_REGS */ \ |
| {0x00000001, 0x00000000}, /* R0_REG */ \ |
| {0x01000000, 0x00000000}, /* R24_REG */ \ |
| {0x02000000, 0x00000000}, /* R25_REG */ \ |
| {0x08000000, 0x00000000}, /* R27_REG */ \ |
| {0xffffffff, 0x80000000}, /* GENERAL_REGS */ \ |
| {0x00000000, 0x7fffffff}, /* FLOAT_REGS */ \ |
| {0xffffffff, 0xffffffff} } |
| |
| /* 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) == 0 ? R0_REG \ |
| : (REGNO) == 24 ? R24_REG \ |
| : (REGNO) == 25 ? R25_REG \ |
| : (REGNO) == 27 ? R27_REG \ |
| : (REGNO) >= 32 && (REGNO) <= 62 ? FLOAT_REGS \ |
| : GENERAL_REGS) |
| |
| /* The class value for index registers, and the one for base regs. */ |
| #define INDEX_REG_CLASS NO_REGS |
| #define BASE_REG_CLASS GENERAL_REGS |
| |
| /* Get reg_class from a letter such as appears in the machine description. */ |
| |
| #define REG_CLASS_FROM_LETTER(C) \ |
| ((C) == 'a' ? R24_REG \ |
| : (C) == 'b' ? R25_REG \ |
| : (C) == 'c' ? R27_REG \ |
| : (C) == 'f' ? FLOAT_REGS \ |
| : (C) == 'v' ? R0_REG \ |
| : NO_REGS) |
| |
| /* Define this macro to change register usage conditional on target flags. */ |
| /* #define CONDITIONAL_REGISTER_USAGE */ |
| |
| /* 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. |
| |
| For Alpha: |
| `I' is used for the range of constants most insns can contain. |
| `J' is the constant zero. |
| `K' is used for the constant in an LDA insn. |
| `L' is used for the constant in a LDAH insn. |
| `M' is used for the constants that can be AND'ed with using a ZAP insn. |
| `N' is used for complemented 8-bit constants. |
| `O' is used for negated 8-bit constants. |
| `P' is used for the constants 1, 2 and 3. */ |
| |
| #define CONST_OK_FOR_LETTER_P alpha_const_ok_for_letter_p |
| |
| /* Similar, but for floating or large integer constants, and defining letters |
| G and H. Here VALUE is the CONST_DOUBLE rtx itself. |
| |
| For Alpha, `G' is the floating-point constant zero. `H' is a CONST_DOUBLE |
| that is the operand of a ZAP insn. */ |
| |
| #define CONST_DOUBLE_OK_FOR_LETTER_P alpha_const_double_ok_for_letter_p |
| |
| /* Optional extra constraints for this machine. |
| |
| For the Alpha, `Q' means that this is a memory operand but not a |
| reference to an unaligned location. |
| |
| `R' is a SYMBOL_REF that has SYMBOL_REF_FLAG set or is the current |
| function. |
| |
| 'S' is a 6-bit constant (valid for a shift insn). |
| |
| 'T' is a HIGH. |
| |
| 'U' is a symbolic operand. |
| |
| 'W' is a vector zero. */ |
| |
| #define EXTRA_CONSTRAINT alpha_extra_constraint |
| |
| /* 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 alpha_preferred_reload_class |
| |
| /* Loading and storing HImode or QImode values to and from memory |
| usually requires a scratch register. The exceptions are loading |
| QImode and HImode from an aligned address to a general register |
| unless byte instructions are permitted. |
| We also cannot load an unaligned address or a paradoxical SUBREG into an |
| FP register. */ |
| |
| #define SECONDARY_INPUT_RELOAD_CLASS(CLASS,MODE,IN) \ |
| alpha_secondary_reload_class((CLASS), (MODE), (IN), 1) |
| |
| #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS,MODE,OUT) \ |
| alpha_secondary_reload_class((CLASS), (MODE), (OUT), 0) |
| |
| /* If we are copying between general and FP registers, we need a memory |
| location unless the FIX extension is available. */ |
| |
| #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \ |
| (! TARGET_FIX && (((CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS) \ |
| || ((CLASS2) == FLOAT_REGS && (CLASS1) != FLOAT_REGS))) |
| |
| /* Specify the mode to be used for memory when a secondary memory |
| location is needed. If MODE is floating-point, use it. Otherwise, |
| widen to a word like the default. This is needed because we always |
| store integers in FP registers in quadword format. This whole |
| area is very tricky! */ |
| #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \ |
| (GET_MODE_CLASS (MODE) == MODE_FLOAT ? (MODE) \ |
| : GET_MODE_SIZE (MODE) >= 4 ? (MODE) \ |
| : mode_for_size (BITS_PER_WORD, GET_MODE_CLASS (MODE), 0)) |
| |
| /* 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) |
| |
| /* Return the class of registers that cannot change mode from FROM to TO. */ |
| |
| #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ |
| (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) \ |
| ? reg_classes_intersect_p (FLOAT_REGS, CLASS) : 0) |
| |
| /* Define the cost of moving between registers of various classes. Moving |
| between FLOAT_REGS and anything else except float regs is expensive. |
| In fact, we make it quite expensive because we really don't want to |
| do these moves unless it is clearly worth it. Optimizations may |
| reduce the impact of not being able to allocate a pseudo to a |
| hard register. */ |
| |
| #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ |
| (((CLASS1) == FLOAT_REGS) == ((CLASS2) == FLOAT_REGS) ? 2 \ |
| : TARGET_FIX ? ((CLASS1) == FLOAT_REGS ? 6 : 8) \ |
| : 4+2*alpha_memory_latency) |
| |
| /* A C expressions returning the cost of moving data of MODE from a register to |
| or from memory. |
| |
| On the Alpha, bump this up a bit. */ |
| |
| extern int alpha_memory_latency; |
| #define MEMORY_MOVE_COST(MODE,CLASS,IN) (2*alpha_memory_latency) |
| |
| /* Provide the cost of a branch. Exact meaning under development. */ |
| #define BRANCH_COST 5 |
| |
| /* Stack layout; function entry, exit and calling. */ |
| |
| /* Define this if pushing a word on the stack |
| makes the stack pointer a smaller address. */ |
| #define STACK_GROWS_DOWNWARD |
| |
| /* Define this 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 0 */ |
| |
| /* Offset within stack frame to start allocating local variables at. |
| If FRAME_GROWS_DOWNWARD, this is the offset to the END of the |
| first local allocated. Otherwise, it is the offset to the BEGINNING |
| of the first local allocated. */ |
| |
| #define STARTING_FRAME_OFFSET 0 |
| |
| /* If we generate an insn to push BYTES bytes, |
| this says how many the stack pointer really advances by. |
| On Alpha, don't define this because there are no push insns. */ |
| /* #define PUSH_ROUNDING(BYTES) */ |
| |
| /* Define this to be nonzero if stack checking is built into the ABI. */ |
| #define STACK_CHECK_BUILTIN 1 |
| |
| /* Define this if the maximum size of all the outgoing args is to be |
| accumulated and pushed during the prologue. The amount can be |
| found in the variable current_function_outgoing_args_size. */ |
| #define ACCUMULATE_OUTGOING_ARGS 1 |
| |
| /* Offset of first parameter from the argument pointer register value. */ |
| |
| #define FIRST_PARM_OFFSET(FNDECL) 0 |
| |
| /* Definitions for register eliminations. |
| |
| We have two registers that can be eliminated on the Alpha. 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. */ |
| |
| /* 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 \ |
| {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
| { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ |
| { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
| { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} |
| |
| /* Given FROM and TO register numbers, say whether this elimination is allowed. |
| Frame pointer elimination is automatically handled. |
| |
| All eliminations are valid since the cases where FP can't be |
| eliminated are already handled. */ |
| |
| #define CAN_ELIMINATE(FROM, TO) 1 |
| |
| /* Round up to a multiple of 16 bytes. */ |
| #define ALPHA_ROUND(X) (((X) + 15) & ~ 15) |
| |
| /* 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) = alpha_initial_elimination_offset(FROM, TO)) |
| |
| /* Define this if stack space is still allocated for a parameter passed |
| in a register. */ |
| /* #define REG_PARM_STACK_SPACE */ |
| |
| /* 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(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. |
| |
| On Alpha the value is found in $0 for integer functions and |
| $f0 for floating-point functions. */ |
| |
| #define FUNCTION_VALUE(VALTYPE, FUNC) \ |
| function_value (VALTYPE, FUNC, VOIDmode) |
| |
| /* Define how to find the value returned by a library function |
| assuming the value has mode MODE. */ |
| |
| #define LIBCALL_VALUE(MODE) \ |
| function_value (NULL, NULL, MODE) |
| |
| /* 1 if N is a possible register number for a function value |
| as seen by the caller. */ |
| |
| #define FUNCTION_VALUE_REGNO_P(N) \ |
| ((N) == 0 || (N) == 1 || (N) == 32 || (N) == 33) |
| |
| /* 1 if N is a possible register number for function argument passing. |
| On Alpha, these are $16-$21 and $f16-$f21. */ |
| |
| #define FUNCTION_ARG_REGNO_P(N) \ |
| (((N) >= 16 && (N) <= 21) || ((N) >= 16 + 32 && (N) <= 21 + 32)) |
| |
| /* 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 Alpha, this is a single integer, which is a number of words |
| of arguments scanned so far. |
| Thus 6 or more means all following args should go on the stack. */ |
| |
| #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 |
| |
| /* Define intermediate macro to compute the size (in registers) of an argument |
| for the Alpha. */ |
| |
| #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED) \ |
| ((MODE) == TFmode || (MODE) == TCmode ? 1 \ |
| : (((MODE) == BLKmode ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \ |
| + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) |
| |
| /* 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) += \ |
| (targetm.calls.must_pass_in_stack (MODE, TYPE)) \ |
| ? 6 : ALPHA_ARG_SIZE (MODE, TYPE, NAMED)) |
| |
| /* 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 Alpha the first 6 words of args are normally in registers |
| and the rest are pushed. */ |
| |
| #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ |
| function_arg((CUM), (MODE), (TYPE), (NAMED)) |
| |
| /* Try to output insns to set TARGET equal to the constant C if it can be |
| done in less than N insns. Do all computations in MODE. Returns the place |
| where the output has been placed if it can be done and the insns have been |
| emitted. If it would take more than N insns, zero is returned and no |
| insns and emitted. */ |
| |
| /* 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! */ |
| |
| struct alpha_compare |
| { |
| struct rtx_def *op0, *op1; |
| int fp_p; |
| }; |
| |
| extern struct alpha_compare alpha_compare; |
| |
| /* Make (or fake) .linkage entry for function call. |
| IS_LOCAL is 0 if name is used in call, 1 if name is used in definition. */ |
| |
| /* This macro defines the start of an assembly comment. */ |
| |
| #define ASM_COMMENT_START " #" |
| |
| /* This macro produces the initial definition of a function. */ |
| |
| #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \ |
| alpha_start_function(FILE,NAME,DECL); |
| |
| /* This macro closes up a function definition for the assembler. */ |
| |
| #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \ |
| alpha_end_function(FILE,NAME,DECL) |
| |
| /* Output any profiling code before the prologue. */ |
| |
| #define PROFILE_BEFORE_PROLOGUE 1 |
| |
| /* Never use profile counters. */ |
| |
| #define NO_PROFILE_COUNTERS 1 |
| |
| /* Output assembler code to FILE to increment profiler label # LABELNO |
| for profiling a function entry. Under OSF/1, profiling is enabled |
| by simply passing -pg to the assembler and linker. */ |
| |
| #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 1 |
| |
| /* Define registers used by the epilogue and return instruction. */ |
| |
| #define EPILOGUE_USES(REGNO) ((REGNO) == 26) |
| |
| /* Output assembler code for a block containing the constant parts |
| of a trampoline, leaving space for the variable parts. |
| |
| The trampoline should set the static chain pointer to value placed |
| into the trampoline and should branch to the specified routine. |
| Note that $27 has been set to the address of the trampoline, so we can |
| use it for addressability of the two data items. */ |
| |
| #define TRAMPOLINE_TEMPLATE(FILE) \ |
| do { \ |
| fprintf (FILE, "\tldq $1,24($27)\n"); \ |
| fprintf (FILE, "\tldq $27,16($27)\n"); \ |
| fprintf (FILE, "\tjmp $31,($27),0\n"); \ |
| fprintf (FILE, "\tnop\n"); \ |
| fprintf (FILE, "\t.quad 0,0\n"); \ |
| } while (0) |
| |
| /* Section in which to place the trampoline. On Alpha, instructions |
| may only be placed in a text segment. */ |
| |
| #define TRAMPOLINE_SECTION text_section |
| |
| /* Length in units of the trampoline for entering a nested function. */ |
| |
| #define TRAMPOLINE_SIZE 32 |
| |
| /* The alignment of a trampoline, in bits. */ |
| |
| #define TRAMPOLINE_ALIGNMENT 64 |
| |
| /* 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) \ |
| alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, 8) |
| |
| /* 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. */ |
| |
| #define RETURN_ADDR_RTX alpha_return_addr |
| |
| /* Before the prologue, RA lives in $26. */ |
| #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 26) |
| #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (26) |
| #define DWARF_ALT_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (64) |
| #define DWARF_ZERO_REG 31 |
| |
| /* Describe how we implement __builtin_eh_return. */ |
| #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 16 : INVALID_REGNUM) |
| #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 28) |
| #define EH_RETURN_HANDLER_RTX \ |
| gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, \ |
| current_function_outgoing_args_size)) |
| |
| /* Addressing modes, and classification of registers for them. */ |
| |
| /* Macros to check register numbers against specific register classes. */ |
| |
| /* These assume that REGNO is a hard or pseudo reg number. |
| They give nonzero only if REGNO is a hard reg of the suitable class |
| or a pseudo reg currently allocated to a suitable hard reg. |
| Since they use reg_renumber, they are safe only once reg_renumber |
| has been allocated, which happens in local-alloc.c. */ |
| |
| #define REGNO_OK_FOR_INDEX_P(REGNO) 0 |
| #define REGNO_OK_FOR_BASE_P(REGNO) \ |
| ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32 \ |
| || (REGNO) == 63 || reg_renumber[REGNO] == 63) |
| |
| /* 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. For the Alpha, |
| there are only constants none since we want to use LDA to load any |
| symbolic addresses into registers. */ |
| |
| #define CONSTANT_ADDRESS_P(X) \ |
| (GET_CODE (X) == CONST_INT \ |
| && (unsigned HOST_WIDE_INT) (INTVAL (X) + 0x8000) < 0x10000) |
| |
| /* Include all constant integers and constant doubles, but not |
| floating-point, except for floating-point zero. */ |
| |
| #define LEGITIMATE_CONSTANT_P alpha_legitimate_constant_p |
| |
| /* 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. */ |
| |
| /* Nonzero if X is a hard reg that can be used as an index |
| or if it is a pseudo reg. */ |
| #define REG_OK_FOR_INDEX_P(X) 0 |
| |
| /* Nonzero if X is a hard reg that can be used as a base reg |
| or if it is a pseudo reg. */ |
| #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ |
| (REGNO (X) < 32 || REGNO (X) == 63 || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
| |
| /* ??? Nonzero if X is the frame pointer, or some virtual register |
| that may eliminate to the frame pointer. These will be allowed to |
| have offsets greater than 32K. This is done because register |
| elimination offsets will change the hi/lo split, and if we split |
| before reload, we will require additional instructions. */ |
| #define NONSTRICT_REG_OK_FP_BASE_P(X) \ |
| (REGNO (X) == 31 || REGNO (X) == 63 \ |
| || (REGNO (X) >= FIRST_PSEUDO_REGISTER \ |
| && REGNO (X) < LAST_VIRTUAL_REGISTER)) |
| |
| /* Nonzero if X is a hard reg that can be used as a base reg. */ |
| #define STRICT_REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) |
| |
| #ifdef REG_OK_STRICT |
| #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P (X) |
| #else |
| #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P (X) |
| #endif |
| |
| /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression that is a |
| valid memory address for an instruction. */ |
| |
| #ifdef REG_OK_STRICT |
| #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \ |
| do { \ |
| if (alpha_legitimate_address_p (MODE, X, 1)) \ |
| goto WIN; \ |
| } while (0) |
| #else |
| #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \ |
| do { \ |
| if (alpha_legitimate_address_p (MODE, X, 0)) \ |
| goto WIN; \ |
| } while (0) |
| #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. */ |
| |
| #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \ |
| do { \ |
| rtx new_x = alpha_legitimize_address (X, NULL_RTX, MODE); \ |
| if (new_x) \ |
| { \ |
| X = new_x; \ |
| goto WIN; \ |
| } \ |
| } while (0) |
| |
| /* Try a machine-dependent way of reloading an illegitimate address |
| operand. If we find one, push the reload and jump to WIN. This |
| macro is used in only one place: `find_reloads_address' in reload.c. */ |
| |
| #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_L,WIN) \ |
| do { \ |
| rtx new_x = alpha_legitimize_reload_address (X, MODE, OPNUM, TYPE, IND_L); \ |
| if (new_x) \ |
| { \ |
| X = new_x; \ |
| goto WIN; \ |
| } \ |
| } while (0) |
| |
| /* Go to LABEL if ADDR (a legitimate address expression) |
| has an effect that depends on the machine mode it is used for. |
| On the Alpha this is true only for the unaligned modes. We can |
| simplify this test since we know that the address must be valid. */ |
| |
| #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ |
| { if (GET_CODE (ADDR) == AND) goto LABEL; } |
| |
| /* Specify the machine mode that this machine uses |
| for the index in the tablejump instruction. */ |
| #define CASE_VECTOR_MODE SImode |
| |
| /* Define as C expression which evaluates to nonzero 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. |
| On the Alpha, the table is really GP-relative, not relative to the PC |
| of the table, but we pretend that it is PC-relative; this should be OK, |
| but we should try to find some better way sometime. */ |
| #define CASE_VECTOR_PC_RELATIVE 1 |
| |
| /* 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 to or from memory |
| in one reasonably fast instruction. */ |
| |
| #define MOVE_MAX 8 |
| |
| /* If a memory-to-memory move would take MOVE_RATIO or more simple |
| move-instruction pairs, we will do a movmem or libcall instead. |
| |
| Without byte/word accesses, we want no more than four instructions; |
| with, several single byte accesses are better. */ |
| |
| #define MOVE_RATIO (TARGET_BWX ? 7 : 2) |
| |
| /* Largest number of bytes of an object that can be placed in a register. |
| On the Alpha we have plenty of registers, so use TImode. */ |
| #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode) |
| |
| /* Nonzero if access to memory by bytes is no faster than for words. |
| Also nonzero if doing byte operations (specifically shifts) in registers |
| is undesirable. |
| |
| On the Alpha, we want to not use the byte operation and instead use |
| masking operations to access fields; these will save instructions. */ |
| |
| #define SLOW_BYTE_ACCESS 1 |
| |
| /* 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) ((MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND) |
| |
| /* Define if loading short immediate values into registers sign extends. */ |
| #define SHORT_IMMEDIATES_SIGN_EXTEND |
| |
| /* 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 |
| |
| /* The CIX ctlz and cttz instructions return 64 for zero. */ |
| #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) |
| #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, TARGET_CIX) |
| |
| /* Define the value returned by a floating-point comparison instruction. */ |
| |
| #define FLOAT_STORE_FLAG_VALUE(MODE) \ |
| REAL_VALUE_ATOF ((TARGET_FLOAT_VAX ? "0.5" : "2.0"), (MODE)) |
| |
| /* Canonicalize a comparison from one we don't have to one we do have. */ |
| |
| #define CANONICALIZE_COMPARISON(CODE,OP0,OP1) \ |
| do { \ |
| if (((CODE) == GE || (CODE) == GT || (CODE) == GEU || (CODE) == GTU) \ |
| && (GET_CODE (OP1) == REG || (OP1) == const0_rtx)) \ |
| { \ |
| rtx tem = (OP0); \ |
| (OP0) = (OP1); \ |
| (OP1) = tem; \ |
| (CODE) = swap_condition (CODE); \ |
| } \ |
| if (((CODE) == LT || (CODE) == LTU) \ |
| && GET_CODE (OP1) == CONST_INT && INTVAL (OP1) == 256) \ |
| { \ |
| (CODE) = (CODE) == LT ? LE : LEU; \ |
| (OP1) = GEN_INT (255); \ |
| } \ |
| } while (0) |
| |
| /* 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 DImode |
| |
| /* Mode of a function address in a call instruction (for indexing purposes). */ |
| |
| #define FUNCTION_MODE Pmode |
| |
| /* 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. |
| |
| We define this on the Alpha so that gen_call and gen_call_value |
| get to see the SYMBOL_REF (for the hint field of the jsr). It will |
| then copy it into a register, thus actually letting the address be |
| cse'ed. */ |
| |
| #define NO_FUNCTION_CSE |
| |
| /* Define this to be nonzero if shift instructions ignore all but the low-order |
| few bits. */ |
| #define SHIFT_COUNT_TRUNCATED 1 |
| |
| /* Control the assembler format that we output. */ |
| |
| /* Output to assembler file text saying following lines |
| may contain character constants, extra white space, comments, etc. */ |
| #define ASM_APP_ON (TARGET_EXPLICIT_RELOCS ? "\t.set\tmacro\n" : "") |
| |
| /* Output to assembler file text saying following lines |
| no longer contain unusual constructs. */ |
| #define ASM_APP_OFF (TARGET_EXPLICIT_RELOCS ? "\t.set\tnomacro\n" : "") |
| |
| #define TEXT_SECTION_ASM_OP "\t.text" |
| |
| /* Output before read-only data. */ |
| |
| #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" |
| |
| /* Output before writable data. */ |
| |
| #define DATA_SECTION_ASM_OP "\t.data" |
| |
| /* How to refer to registers in assembler output. |
| This sequence is indexed by compiler's hard-register-number (see above). */ |
| |
| #define REGISTER_NAMES \ |
| {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ |
| "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ |
| "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ |
| "$24", "$25", "$26", "$27", "$28", "$29", "$30", "AP", \ |
| "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", \ |
| "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \ |
| "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",\ |
| "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "FP"} |
| |
| /* Strip name encoding when emitting labels. */ |
| |
| #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ |
| do { \ |
| const char *name_ = NAME; \ |
| if (*name_ == '@' || *name_ == '%') \ |
| name_ += 2; \ |
| if (*name_ == '*') \ |
| name_++; \ |
| else \ |
| fputs (user_label_prefix, STREAM); \ |
| fputs (name_, STREAM); \ |
| } while (0) |
| |
| /* Globalizing directive for a label. */ |
| #define GLOBAL_ASM_OP "\t.globl " |
| |
| /* The prefix to add to user-visible assembler symbols. */ |
| |
| #define USER_LABEL_PREFIX "" |
| |
| /* This is how to output a label for a jump table. Arguments are the same as |
| for (*targetm.asm_out.internal_label), except the insn for the jump table is |
| passed. */ |
| |
| #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \ |
| { ASM_OUTPUT_ALIGN (FILE, 2); (*targetm.asm_out.internal_label) (FILE, 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%ld", (PREFIX), (long)(NUM)) |
| |
| /* We use the default ASCII-output routine, except that we don't write more |
| than 50 characters since the assembler doesn't support very long lines. */ |
| |
| #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ |
| do { \ |
| FILE *_hide_asm_out_file = (MYFILE); \ |
| const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ |
| int _hide_thissize = (MYLENGTH); \ |
| int _size_so_far = 0; \ |
| { \ |
| FILE *asm_out_file = _hide_asm_out_file; \ |
| const unsigned char *p = _hide_p; \ |
| int thissize = _hide_thissize; \ |
| int i; \ |
| fprintf (asm_out_file, "\t.ascii \""); \ |
| \ |
| for (i = 0; i < thissize; i++) \ |
| { \ |
| register int c = p[i]; \ |
| \ |
| if (_size_so_far ++ > 50 && i < thissize - 4) \ |
| _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ |
| \ |
| if (c == '\"' || c == '\\') \ |
| putc ('\\', asm_out_file); \ |
| if (c >= ' ' && c < 0177) \ |
| putc (c, asm_out_file); \ |
| else \ |
| { \ |
| fprintf (asm_out_file, "\\%o", c); \ |
| /* After an octal-escape, if a digit follows, \ |
| terminate one string constant and start another. \ |
| The VAX assembler fails to stop reading the escape \ |
| after three digits, so this is the only way we \ |
| can get it to parse the data properly. */ \ |
| if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ |
| _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \""); \ |
| } \ |
| } \ |
| fprintf (asm_out_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) \ |
| fprintf (FILE, "\t.%s $L%d\n", TARGET_ABI_WINDOWS_NT ? "long" : "gprel32", \ |
| (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) \ |
| if ((LOG) != 0) \ |
| fprintf (FILE, "\t.align %d\n", LOG); |
| |
| /* This is how to advance the location counter by SIZE bytes. */ |
| |
| #define ASM_OUTPUT_SKIP(FILE,SIZE) \ |
| fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)) |
| |
| /* This says how to output an assembler line |
| to define a global common symbol. */ |
| |
| #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ |
| ( fputs ("\t.comm ", (FILE)), \ |
| assemble_name ((FILE), (NAME)), \ |
| fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) |
| |
| /* This says how to output an assembler line |
| to define a local common symbol. */ |
| |
| #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ |
| ( fputs ("\t.lcomm ", (FILE)), \ |
| assemble_name ((FILE), (NAME)), \ |
| fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))) |
| |
| |
| /* 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) |
| |
| /* Determine which codes are valid without a following integer. These must |
| not be alphabetic. |
| |
| ~ Generates the name of the current function. |
| |
| / Generates the instruction suffix. The TRAP_SUFFIX and ROUND_SUFFIX |
| attributes are examined to determine what is appropriate. |
| |
| , Generates single precision suffix for floating point |
| instructions (s for IEEE, f for VAX) |
| |
| - Generates double precision suffix for floating point |
| instructions (t for IEEE, g for VAX) |
| |
| + Generates a nop instruction after a noreturn call at the very end |
| of the function |
| */ |
| |
| #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
| ((CODE) == '/' || (CODE) == ',' || (CODE) == '-' || (CODE) == '~' \ |
| || (CODE) == '#' || (CODE) == '*' || (CODE) == '&' || (CODE) == '+') |
| |
| /* Print a memory address as an operand to reference that memory location. */ |
| |
| #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ |
| print_operand_address((FILE), (ADDR)) |
| |
| /* Implement `va_start' for varargs and stdarg. */ |
| #define EXPAND_BUILTIN_VA_START(valist, nextarg) \ |
| alpha_va_start (valist, nextarg) |
| |
| /* Tell collect that the object format is ECOFF. */ |
| #define OBJECT_FORMAT_COFF |
| #define EXTENDED_COFF |
| |
| /* If we use NM, pass -g to it so it only lists globals. */ |
| #define NM_FLAGS "-pg" |
| |
| /* Definitions for debugging. */ |
| |
| #define SDB_DEBUGGING_INFO 1 /* generate info for mips-tfile */ |
| #define DBX_DEBUGGING_INFO 1 /* generate embedded stabs */ |
| #define MIPS_DEBUGGING_INFO 1 /* MIPS specific debugging info */ |
| |
| #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */ |
| #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG |
| #endif |
| |
| |
| /* Correct the offset of automatic variables and arguments. Note that |
| the Alpha debug format wants all automatic variables and arguments |
| to be in terms of two different offsets from the virtual frame pointer, |
| which is the stack pointer before any adjustment in the function. |
| The offset for the argument pointer is fixed for the native compiler, |
| it is either zero (for the no arguments case) or large enough to hold |
| all argument registers. |
| The offset for the auto pointer is the fourth argument to the .frame |
| directive (local_offset). |
| To stay compatible with the native tools we use the same offsets |
| from the virtual frame pointer and adjust the debugger arg/auto offsets |
| accordingly. These debugger offsets are set up in output_prolog. */ |
| |
| extern long alpha_arg_offset; |
| extern long alpha_auto_offset; |
| #define DEBUGGER_AUTO_OFFSET(X) \ |
| ((GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) + alpha_auto_offset) |
| #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET + alpha_arg_offset) |
| |
| /* mips-tfile doesn't understand .stabd directives. */ |
| #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \ |
| dbxout_begin_stabn_sline (LINE); \ |
| dbxout_stab_value_internal_label ("LM", &COUNTER); \ |
| } while (0) |
| |
| /* We want to use MIPS-style .loc directives for SDB line numbers. */ |
| extern int num_source_filenames; |
| #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \ |
| fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE) |
| |
| #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ |
| alpha_output_filename (STREAM, NAME) |
| |
| /* mips-tfile.c limits us to strings of one page. We must underestimate this |
| number, because the real length runs past this up to the next |
| continuation point. This is really a dbxout.c bug. */ |
| #define DBX_CONTIN_LENGTH 3000 |
| |
| /* By default, turn on GDB extensions. */ |
| #define DEFAULT_GDB_EXTENSIONS 1 |
| |
| /* Stabs-in-ECOFF can't handle dbxout_function_end(). */ |
| #define NO_DBX_FUNCTION_END 1 |
| |
| /* If we are smuggling stabs through the ALPHA ECOFF object |
| format, put a comment in front of the .stab<x> operation so |
| that the ALPHA assembler does not choke. The mips-tfile program |
| will correctly put the stab into the object file. */ |
| |
| #define ASM_STABS_OP ((TARGET_GAS) ? "\t.stabs\t" : " #.stabs\t") |
| #define ASM_STABN_OP ((TARGET_GAS) ? "\t.stabn\t" : " #.stabn\t") |
| #define ASM_STABD_OP ((TARGET_GAS) ? "\t.stabd\t" : " #.stabd\t") |
| |
| /* Forward references to tags are allowed. */ |
| #define SDB_ALLOW_FORWARD_REFERENCES |
| |
| /* Unknown tags are also allowed. */ |
| #define SDB_ALLOW_UNKNOWN_REFERENCES |
| |
| #define PUT_SDB_DEF(a) \ |
| do { \ |
| fprintf (asm_out_file, "\t%s.def\t", \ |
| (TARGET_GAS) ? "" : "#"); \ |
| ASM_OUTPUT_LABELREF (asm_out_file, a); \ |
| fputc (';', asm_out_file); \ |
| } while (0) |
| |
| #define PUT_SDB_PLAIN_DEF(a) \ |
| do { \ |
| fprintf (asm_out_file, "\t%s.def\t.%s;", \ |
| (TARGET_GAS) ? "" : "#", (a)); \ |
| } while (0) |
| |
| #define PUT_SDB_TYPE(a) \ |
| do { \ |
| fprintf (asm_out_file, "\t.type\t0x%x;", (a)); \ |
| } while (0) |
| |
| /* For block start and end, we create labels, so that |
| later we can figure out where the correct offset is. |
| The normal .ent/.end serve well enough for functions, |
| so those are just commented out. */ |
| |
| extern int sdb_label_count; /* block start/end next label # */ |
| |
| #define PUT_SDB_BLOCK_START(LINE) \ |
| do { \ |
| fprintf (asm_out_file, \ |
| "$Lb%d:\n\t%s.begin\t$Lb%d\t%d\n", \ |
| sdb_label_count, \ |
| (TARGET_GAS) ? "" : "#", \ |
| sdb_label_count, \ |
| (LINE)); \ |
| sdb_label_count++; \ |
| } while (0) |
| |
| #define PUT_SDB_BLOCK_END(LINE) \ |
| do { \ |
| fprintf (asm_out_file, \ |
| "$Le%d:\n\t%s.bend\t$Le%d\t%d\n", \ |
| sdb_label_count, \ |
| (TARGET_GAS) ? "" : "#", \ |
| sdb_label_count, \ |
| (LINE)); \ |
| sdb_label_count++; \ |
| } while (0) |
| |
| #define PUT_SDB_FUNCTION_START(LINE) |
| |
| #define PUT_SDB_FUNCTION_END(LINE) |
| |
| #define PUT_SDB_EPILOGUE_END(NAME) ((void)(NAME)) |
| |
| /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for |
| mips-tdump.c to print them out. |
| |
| These must match the corresponding definitions in gdb/mipsread.c. |
| Unfortunately, gcc and gdb do not currently share any directories. */ |
| |
| #define CODE_MASK 0x8F300 |
| #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) |
| #define MIPS_MARK_STAB(code) ((code)+CODE_MASK) |
| #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK) |
| |
| /* Override some mips-tfile definitions. */ |
| |
| #define SHASH_SIZE 511 |
| #define THASH_SIZE 55 |
| |
| /* Align ecoff symbol tables to avoid OSF1/1.3 nm complaints. */ |
| |
| #define ALIGN_SYMTABLE_OFFSET(OFFSET) (((OFFSET) + 7) & ~7) |
| |
| /* The system headers under Alpha systems are generally C++-aware. */ |
| #define NO_IMPLICIT_EXTERN_C |
| |
| /* LLVM LOCAL begin */ |
| #ifdef ENABLE_LLVM |
| |
| /* LLVM_TARGET_INTRINSIC_PREFIX - Specify what prefix this target uses for its |
| * intrinsics. |
| */ |
| #define LLVM_TARGET_INTRINSIC_PREFIX "alpha" |
| |
| /* LLVM_TARGET_INTRINSIC_LOWER - To handle builtins, we want to expand the |
| * invocation into normal LLVM code. If the target can handle the builtin, this |
| * macro should call the target TreeToLLVM::TargetIntrinsicLower method and |
| * return true.This macro is invoked from a method in the TreeToLLVM class. |
| */ |
| #define LLVM_TARGET_INTRINSIC_LOWER(EXP, BUILTIN_CODE, DESTLOC, RESULT, \ |
| DESTTY, OPS) \ |
| TargetIntrinsicLower(EXP, BUILTIN_CODE, DESTLOC, RESULT, DESTTY, OPS); |
| #endif /* ENABLE_LLVM */ |
| /* LLVM LOCAL end */ |