9d4dd4e9ce
From-SVN: r3955
1118 lines
39 KiB
C++
1118 lines
39 KiB
C++
/* Definitions of target machine for GNU compiler.
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Hitachi H8/300 version generating coff
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Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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Contributed by Steve Chamberlain (sac@cygnus.com)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Names to predefine in the preprocessor for this target machine. */
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#define CPP_PREDEFINES "-D__H8300__ -D_DOUBLE_IS_32BITS"
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#define LIB_SPEC "%{mrelax:-relax} %{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
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/* Print subsidiary information on the compiler version in use. */
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#define TARGET_VERSION fprintf (stderr, " (Hitachi H8/300)");
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/* Run-time compilation parameters selecting different hardware subsets. */
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int target_flags;
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/* Macros used in the machine description to test the flags. */
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/* Macro to define tables used to set the flags.
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This is a list in braces of pairs in braces,
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each pair being { "NAME", VALUE }
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where VALUE is the bits to set or minus the bits to clear.
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An empty string NAME is used to identify the default VALUE. */
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#define TARGET_SWITCHES \
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{ {"int32",8}, \
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{"long16",16}, \
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{"double64",32}, \
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{"addresses",64 }, \
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{"quickcall",128}, \
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{"slowbyte",256}, \
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{"noquick",512}, \
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{"relax",1024}, \
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{ "", TARGET_DEFAULT}}
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#define OPTIMIZATION_OPTIONS(OPTIMIZE) \
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{ \
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obey_regdecls = 0; \
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flag_omit_frame_pointer = (OPTIMIZE > 1); \
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}
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#define OVERRIDE_OPTIONS \
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{ \
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flag_no_function_cse = 1; \
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}
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#define TARGET_INT32 (target_flags & 8)
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#define TARGET_LONG16 (target_flags & 16)
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#define TARGET_DOUBLE32 (!(target_flags & 32))
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#define TARGET_ADDRESSES (target_flags & 64)
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#define TARGET_QUICKCALL (target_flags & 128)
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#define TARGET_SLOWBYTE (target_flags & 256)
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#define TARGET_NOQUICK (target_flags & 512)
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/* Default target_flags if no switches specified. */
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#ifndef TARGET_DEFAULT
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#define TARGET_DEFAULT 0
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#endif
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#define TARGET_NO_IMPORT (target_flags & MASK_NO_IMPORT)
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/* Target machine storage layout. */
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/* Define this if most significant bit is lowest numbered
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in instructions that operate on numbered bit-fields.
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This is not true on the H8/300. */
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#define BITS_BIG_ENDIAN 0
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/* Define this if most significant byte of a word is the lowest numbered. */
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/* That is true on the H8/300. */
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#define BYTES_BIG_ENDIAN 1
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/* Define this if most significant word of a multiword number is lowest
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numbered.
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This is true on an H8/300 (actually we can make it up, but we choose to
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be consistent. */
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#define WORDS_BIG_ENDIAN 1
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/* Number of bits in an addressable storage unit */
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#define BITS_PER_UNIT 8
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#define UNITS_PER_PTR 2
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/* Width in bits of a "word", which is the contents of a machine register.
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Note that this is not necessarily the width of data type `int';
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if using 16-bit ints on a 68000, this would still be 32.
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But on a machine with 16-bit registers, this would be 16. */
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#define BITS_PER_WORD 16
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#define MAX_BITS_PER_WORD 16
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/* Width of a word, in units (bytes). */
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#define UNITS_PER_WORD 2
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/* Width in bits of a pointer.
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See also the macro `Pmode' defined below. */
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#define POINTER_SIZE 16
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#define SHORT_TYPE_SIZE 16
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#define INT_TYPE_SIZE (TARGET_INT32 ? 32 : 16)
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#define LONG_TYPE_SIZE 32
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#define LONG_LONG_TYPE_SIZE 32
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#define DOUBLE_TYPE_SIZE (TARGET_DOUBLE32 ? 32 : 64)
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#define FLOAT_TYPE_SIZE 32
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#define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
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#define MAX_FIXED_MODE_SIZE 32
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/* Allocation boundary (in *bits*) for storing arguments in argument list. */
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#define PARM_BOUNDARY 16
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/* Allocation boundary (in *bits*) for the code of a function. */
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#define FUNCTION_BOUNDARY 16
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/* Alignment of field after `int : 0' in a structure. */
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#define EMPTY_FIELD_BOUNDARY (16)
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/* Every structure's size must be a multiple of this. */
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#define STRUCTURE_SIZE_BOUNDARY 16
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/* A bitfield declared as `int' forces `int' alignment for the struct. */
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#define PCC_BITFIELD_TYPE_MATTERS 0
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/* No data type wants to be aligned rounder than this. */
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#define BIGGEST_ALIGNMENT 16
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/* No structure field wants to be aligned rounder than this. */
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#define BIGGEST_FIELD_ALIGNMENT 16
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/* The stack goes in 16 bit lumps. */
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#define STACK_BOUNDARY 16
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/* Define this if move instructions will actually fail to work
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when given unaligned data. */
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#define STRICT_ALIGNMENT 1
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/* Standard register usage. */
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/* Number of actual hardware registers.
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The hardware registers are assigned numbers for the compiler
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from 0 to just below FIRST_PSEUDO_REGISTER.
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All registers that the compiler knows about must be given numbers,
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even those that are not normally considered general registers.
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Reg 8 does not correspond to any hardware register, but instead
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appears in the RTL as an argument pointer prior to reload, and is
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eliminated during reloading in favor of either the stack or frame
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pointer. */
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#define FIRST_PSEUDO_REGISTER 9
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/* 1 for registers that have pervasive standard uses
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and are not available for the register allocator.
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r7 is the stack pointer, r8 is the arg pointer. */
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#define FIXED_REGISTERS \
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{ 0,0,0,0, 0,0,0,1, 1 }
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/* 1 for registers not available across function calls.
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These must include the FIXED_REGISTERS and also any
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registers that can be used without being saved.
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The latter must include the registers where values are returned
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and the register where structure-value addresses are passed.
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Aside from that, you can include as many other registers as you
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like.
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The H8/300 destroys r0, r1, r4 and r5. */
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#define CALL_USED_REGISTERS \
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{1,1,0,0, 1,1,0,1, 1 }
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/* This is the order in which to allocate registers
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normally. */
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#define REG_ALLOC_ORDER { 0, 1, 4, 5, 2, 3, 6, 7, 8 }
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/* Return number of consecutive hard regs needed starting at reg REGNO
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to hold something of mode MODE.
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This is ordinarily the length in words of a value of mode MODE
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but can be less for certain modes in special long registers. */
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#define HARD_REGNO_NREGS(REGNO, MODE) \
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((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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/* Value is 1 if hard register REGNO can hold a value of machine-mode
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MODE.
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If an even reg, then anything goes. Otherwise the mode must be QI
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or HI. */
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#define HARD_REGNO_MODE_OK(REGNO, MODE) \
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((((REGNO) & 1) == 0) || (MODE == HImode) || (MODE == QImode))
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/* Value is 1 if it is a good idea to tie two pseudo registers
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when one has mode MODE1 and one has mode MODE2.
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If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
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for any hard reg, then this must be 0 for correct output. */
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#define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) == (MODE2))
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/* Specify the registers used for certain standard purposes.
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The values of these macros are register numbers. */
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/* H8/300 pc is not overloaded on a register. */
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/*#define PC_REGNUM 15*/
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/* Register to use for pushing function arguments. */
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#define STACK_POINTER_REGNUM 7
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/* Base register for access to local variables of the function. */
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#define FRAME_POINTER_REGNUM 6
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/* Value should be nonzero if functions must have frame pointers.
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Zero means the frame pointer need not be set up (and parms
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may be accessed via the stack pointer) in functions that seem suitable.
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This is computed in `reload', in reload1.c. */
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#define FRAME_POINTER_REQUIRED 0
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/* Base register for access to arguments of the function. */
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#define ARG_POINTER_REGNUM 8
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/* Register in which static-chain is passed to a function. */
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#define STATIC_CHAIN_REGNUM 0
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/* Define the classes of registers for register constraints in the
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machine description. Also define ranges of constants.
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One of the classes must always be named ALL_REGS and include all hard regs.
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If there is more than one class, another class must be named NO_REGS
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and contain no registers.
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The name GENERAL_REGS must be the name of a class (or an alias for
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another name such as ALL_REGS). This is the class of registers
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that is allowed by "g" or "r" in a register constraint.
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Also, registers outside this class are allocated only when
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instructions express preferences for them.
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The classes must be numbered in nondecreasing order; that is,
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a larger-numbered class must never be contained completely
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in a smaller-numbered class.
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For any two classes, it is very desirable that there be another
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class that represents their union. */
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/* The H8/300 has only one kind of register, but we mustn't do byte by
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byte operations on the sp, so we keep it as a different class. */
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enum reg_class { NO_REGS, LONG_REGS, GENERAL_REGS, SP_REG, ALL_REGS, LIM_REG_CLASSES };
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#define N_REG_CLASSES (int) LIM_REG_CLASSES
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/* Give names of register classes as strings for dump file. */
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#define REG_CLASS_NAMES \
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{"NO_REGS", "LONG_REGS", "GENERAL_REGS", "SP_REG", "ALL_REGS", "LIM_REGS"}
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/* Define which registers fit in which classes.
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This is an initializer for a vector of HARD_REG_SET
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of length N_REG_CLASSES. */
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#define REG_CLASS_CONTENTS \
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{ 0, /* No regs */ \
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0x7f, /* LONG_REGS */ \
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0x7f, /* GENERAL_REGS */ \
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0x80, /* SP_REG */ \
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0xff, /* ALL_REGS */ \
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}
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/* The same information, inverted:
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Return the class number of the smallest class containing
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reg number REGNO. This could be a conditional expression
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or could index an array. */
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#define REGNO_REG_CLASS(REGNO) \
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((REGNO) >= STACK_POINTER_REGNUM \
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? ((REGNO) >= FRAME_POINTER_REGNUM \
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? SP_REG \
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: GENERAL_REGS) \
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: LONG_REGS)
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/* The class value for index registers, and the one for base regs. */
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#define INDEX_REG_CLASS NO_REGS
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#define BASE_REG_CLASS GENERAL_REGS
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/* Get reg_class from a letter such as appears in the machine description. */
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#define REG_CLASS_FROM_LETTER(C) \
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((C) == 'a' ? SP_REG : (((C) == 'l') ? LONG_REGS : NO_REGS))
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/* The letters I, J, K, L, M, N, O, P in a register constraint string
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can be used to stand for particular ranges of immediate operands.
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This macro defines what the ranges are.
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C is the letter, and VALUE is a constant value.
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Return 1 if VALUE is in the range specified by C. */
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#define CONST_OK_FOR_LETTER_P(VALUE, C) \
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((C) == 'I' ? (VALUE) == 0 : \
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(C) == 'J' ? (((VALUE) & 0xff00) == 0) : \
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(C) == 'K' ? ((VALUE) == 1 || (VALUE) == 2) : \
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(C) == 'L' ? ((VALUE) == -1 || (VALUE) == -2) : \
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(C) == 'M' ? ((VALUE) == 3 || (VALUE) == 4) : \
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(C) == 'N' ? ((VALUE) == -3 || (VALUE) == -4) : \
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(C) == 'O' ? (potg8 (VALUE)) : \
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(C) == 'P' ? (potl8 (VALUE)) : \
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0)
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/* Similar, but for floating constants, and defining letters G and H.
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Here VALUE is the CONST_DOUBLE rtx itself.
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`G' is a floating-point zero. */
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#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
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((C) == 'G' ? ((VALUE) == CONST0_RTX (DFmode) \
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|| (VALUE) == CONST0_RTX (DFmode)) \
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: 0)
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/* Extra constraints - 'U' if for an operand valid for a bset
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destination; i.e. a register or register indirect target. */
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#define EXTRA_CONSTRAINT(OP, C) \
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(((C) == 'U') \
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? ((GET_CODE (OP) == REG) \
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|| ((GET_CODE (OP) == MEM) \
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&& GET_CODE (XEXP (OP, 0)) == REG)) \
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: 0)
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/* Given an rtx X being reloaded into a reg required to be
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in class CLASS, return the class of reg to actually use.
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In general this is just CLASS; but on some machines
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in some cases it is preferable to use a more restrictive class. */
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#define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
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/* Return the maximum number of consecutive registers
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needed to represent mode MODE in a register of class CLASS. */
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/* On the H8, this is the size of MODE in words,
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except in the FP regs, where a single reg is always enough. */
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#define CLASS_MAX_NREGS(CLASS, MODE) \
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((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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/* Any SI register to register move may need to be reloaded,
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so define REGISTER_MOVE_COST to be > 2 so that reload never
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shortcuts. */
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#define REGISTER_MOVE_COST(CLASS1, CLASS2) 3
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/* Stack layout; function entry, exit and calling. */
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/* Define this if pushing a word on the stack
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makes the stack pointer a smaller address. */
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#define STACK_GROWS_DOWNWARD
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/* Define this if the nominal address of the stack frame
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is at the high-address end of the local variables;
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that is, each additional local variable allocated
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goes at a more negative offset in the frame. */
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#define FRAME_GROWS_DOWNWARD
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/* Offset within stack frame to start allocating local variables at.
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If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
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first local allocated. Otherwise, it is the offset to the BEGINNING
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of the first local allocated. */
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#define STARTING_FRAME_OFFSET 0
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/* If we generate an insn to push BYTES bytes,
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this says how many the stack pointer really advances by.
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On the H8/300, @-sp really pushes a byte if you ask it to - but that's
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dangerous, so we claim that it always pushes a word, then we catch
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the mov.b rx,@-sp and turn it into a mov.w rx,@-sp on output. */
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#define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
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/* Offset of first parameter from the argument pointer register value. */
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/* Is equal to the size of the saved fp + pc, even if an fp isn't
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saved since the value is used before we know. */
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#define FIRST_PARM_OFFSET(FNDECL) 0
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|
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/* Value is the number of bytes of arguments automatically
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popped when returning from a subroutine call.
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FUNTYPE is the data type of the function (as a tree),
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or for a library call it is an identifier node for the subroutine name.
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SIZE is the number of bytes of arguments passed on the stack.
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On the H8/300 the return does not pop anything. */
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#define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
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|
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/* Definitions for register eliminations.
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This is an array of structures. Each structure initializes one pair
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of eliminable registers. The "from" register number is given first,
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followed by "to". Eliminations of the same "from" register are listed
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||
in order of preference.
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|
||
We have two registers that can be eliminated on the i386. First, the
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frame pointer register can often be eliminated in favor of the stack
|
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pointer register. Secondly, the argument pointer register can always be
|
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eliminated; it is replaced with either the stack or frame pointer. */
|
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#define ELIMINABLE_REGS \
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{{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
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{ ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
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{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
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#define CAN_ELIMINATE(FROM, TO) \
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((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
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? ! frame_pointer_needed \
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: 1)
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|
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/* Define the offset between two registers, one to be eliminated, and the other
|
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its replacement, at the start of a routine. */
|
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#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) OFFSET = io (FROM,TO)
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|
||
/* Define how to find the value returned by a function.
|
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VALTYPE is the data type of the value (as a tree).
|
||
If the precise function being called is known, FUNC is its FUNCTION_DECL;
|
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otherwise, FUNC is 0.
|
||
|
||
On the H8/300 the return value is in R0/R1. */
|
||
#define FUNCTION_VALUE(VALTYPE, FUNC) \
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gen_rtx (REG, TYPE_MODE (VALTYPE), 0)
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|
||
/* Define how to find the value returned by a library function
|
||
assuming the value has mode MODE. */
|
||
|
||
/* On the H8/300 the return value is in R0/R1. */
|
||
#define LIBCALL_VALUE(MODE) \
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gen_rtx (REG, MODE, 0)
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|
||
/* 1 if N is a possible register number for a function value.
|
||
On the H8/300, R0 is the only register thus used. */
|
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#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
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|
||
/* Define this if PCC uses the nonreentrant convention for returning
|
||
structure and union values. */
|
||
#define PCC_STATIC_STRUCT_RETURN
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|
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/* 1 if N is a possible register number for function argument passing.
|
||
On the H8/300, no registers are used in this way. */
|
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#define FUNCTION_ARG_REGNO_P(N) 0
|
||
|
||
/* Register in which address to store a structure value
|
||
is passed to a function. */
|
||
#define STRUCT_VALUE 0
|
||
#define STRUCT_VALUE_REGNUM 0
|
||
#define STRUCT_VALUE_INCOMING 0
|
||
|
||
/* Return true if X should be returned in memory. */
|
||
#define RETURN_IN_MEMORY(X) \
|
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(TYPE_MODE (X) == BLKmode || GET_MODE_SIZE (TYPE_MODE (X)) > 4)
|
||
|
||
/* Don't default to pcc-struct-return, because we have already specified
|
||
exactly how to return structures in the RETURN_IN_MEMORY macro. */
|
||
#define DEFAULT_PCC_STRUCT_RETURN 0
|
||
|
||
/* When defined, the compiler allows registers explicitly used in the
|
||
rtl to be used as spill registers but prevents the compiler from
|
||
extending the lifetime of these registers. */
|
||
#define SMALL_REGISTER_CLASSES
|
||
|
||
/* Define a data type for recording info about an argument list
|
||
during the scan of that argument list. This data type should
|
||
Hold all necessary information about the function itself
|
||
and about the args processed so far, enough to enable macros
|
||
such as FUNCTION_ARG to determine where the next arg should go.
|
||
|
||
On the H8/300, this is a two item struct, the first is the number of bytes
|
||
scanned so far, the second the name of any libcall. */
|
||
|
||
#define CUMULATIVE_ARGS struct cum_arg
|
||
struct cum_arg { int nbytes; struct rtx_def* libcall; };
|
||
|
||
/* Initialize a variable CUM of type CUMULATIVE_ARGS
|
||
for a call to a function whose data type is FNTYPE.
|
||
For a library call, FNTYPE is 0.
|
||
|
||
On the H8/300, the offset starts at 0. */
|
||
#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \
|
||
((CUM).nbytes = 0, (CUM).libcall = LIBNAME)
|
||
|
||
/* Update the data in CUM to advance over an argument
|
||
of mode MODE and data type TYPE.
|
||
|
||
All sizes rounded up to even bytes. */
|
||
|
||
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
|
||
((CUM).nbytes += ((MODE) != BLKmode \
|
||
? (GET_MODE_SIZE (MODE) + 1) & ~1 \
|
||
: (int_size_in_bytes (TYPE) + 1) & ~1))
|
||
|
||
/* Define where to put the arguments to a function.
|
||
Value is zero to push the argument on the stack,
|
||
or a hard register in which to store the argument.
|
||
|
||
MODE is the argument's machine mode.
|
||
TYPE is the data type of the argument (as a tree).
|
||
This is null for libcalls where that information may
|
||
not be available.
|
||
CUM is a variable of type CUMULATIVE_ARGS which gives info about
|
||
the preceding args and about the function being called.
|
||
NAMED is nonzero if this argument is a named parameter
|
||
(otherwise it is an extra parameter matching an ellipsis). */
|
||
|
||
/* On the H8/300 all normal args are pushed, we pass args to named
|
||
functions in registers. */
|
||
|
||
extern struct rtx_def *function_arg();
|
||
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
|
||
function_arg (&CUM, MODE, TYPE, NAMED)
|
||
|
||
/* This macro generates the assembly code for function entry.
|
||
FILE is a stdio stream to output the code to.
|
||
SIZE is an int: how many units of temporary storage to allocate.
|
||
Refer to the array `regs_ever_live' to determine which registers
|
||
to save; `regs_ever_live[I]' is nonzero if register number I
|
||
is ever used in the function. This macro is responsible for
|
||
knowing which registers should not be saved even if used. */
|
||
|
||
#define FUNCTION_PROLOGUE(FILE, SIZE) \
|
||
function_prologue (FILE, SIZE)
|
||
|
||
/* Output assembler code to FILE to increment profiler label # LABELNO
|
||
for profiling a function entry. */
|
||
|
||
#define FUNCTION_PROFILER(FILE, LABELNO) \
|
||
fprintf (FILE, "\t; not implemented\n", (LABELNO));
|
||
|
||
/* Output assembler code to FILE to initialize this source file's
|
||
basic block profiling info, if that has not already been done. */
|
||
|
||
#define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
|
||
fprintf (FILE, "\t; not implemented \n", LABELNO, LABELNO);
|
||
|
||
/* Output assembler code to FILE to increment the entry-count for
|
||
the BLOCKNO'th basic block in this source file. */
|
||
|
||
#define BLOCK_PROFILER(FILE, BLOCKNO) \
|
||
fprintf (FILE, "\t; not implemented\n");
|
||
|
||
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
|
||
the stack pointer does not matter. The value is tested only in
|
||
functions that have frame pointers.
|
||
No definition is equivalent to always zero. */
|
||
|
||
#define EXIT_IGNORE_STACK 0
|
||
|
||
/* This macro generates the assembly code for function exit,
|
||
on machines that need it. If FUNCTION_EPILOGUE is not defined
|
||
then individual return instructions are generated for each
|
||
return statement. Args are same as for FUNCTION_PROLOGUE. */
|
||
|
||
#define FUNCTION_EPILOGUE(FILE, SIZE) \
|
||
function_epilogue (FILE, SIZE)
|
||
|
||
/* Output assembler code for a block containing the constant parts
|
||
of a trampoline, leaving space for the variable parts. */
|
||
|
||
#define TRAMPOLINE_TEMPLATE(FILE) \
|
||
fprintf (FILE, " trampolines not implemented\n");
|
||
|
||
/* Length in units of the trampoline for entering a nested function. */
|
||
|
||
#define TRAMPOLINE_SIZE 15
|
||
|
||
/* Emit RTL insns to initialize the variable parts of a trampoline.
|
||
FNADDR is an RTX for the address of the function's pure code.
|
||
CXT is an RTX for the static chain value for the function. */
|
||
|
||
/* We copy the register-mask from the function's pure code
|
||
to the start of the trampoline. */
|
||
#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
|
||
{ \
|
||
emit_move_insn (gen_rtx (MEM, HImode, TRAMP), \
|
||
gen_rtx (MEM, HImode, FNADDR)); \
|
||
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)), CXT);\
|
||
emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 11)), \
|
||
plus_constant (FNADDR, 2)); \
|
||
}
|
||
|
||
/* Addressing modes, and classification of registers for them.
|
||
Although the H8/300 has pre decrement destinations and post
|
||
increment sources on moves, they are not general enough to be much
|
||
use to gcc */
|
||
|
||
/*#define HAVE_POST_INCREMENT*/
|
||
/*#define HAVE_POST_DECREMENT */
|
||
|
||
/*#define HAVE_PRE_DECREMENT*/
|
||
/*#define HAVE_PRE_INCREMENT */
|
||
|
||
/* Macros to check register numbers against specific register classes. */
|
||
|
||
/* These assume that REGNO is a hard or pseudo reg number.
|
||
They give nonzero only if REGNO is a hard reg of the suitable class
|
||
or a pseudo reg currently allocated to a suitable hard reg.
|
||
Since they use reg_renumber, they are safe only once reg_renumber
|
||
has been allocated, which happens in local-alloc.c. */
|
||
|
||
#define REGNO_OK_FOR_INDEX_P(regno) 0
|
||
|
||
#define REGNO_OK_FOR_BASE_P(regno) \
|
||
((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
|
||
|
||
/* Maximum number of registers that can appear in a valid memory address. */
|
||
|
||
#define MAX_REGS_PER_ADDRESS 1
|
||
|
||
/* 1 if X is an rtx for a constant that is a valid address. */
|
||
|
||
#define CONSTANT_ADDRESS_P(X) \
|
||
(GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
|
||
|| GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
|
||
|| GET_CODE (X) == HIGH)
|
||
|
||
/* Nonzero if the constant value X is a legitimate general operand.
|
||
It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
|
||
|
||
#define LEGITIMATE_CONSTANT_P(X) (GET_CODE (X) != CONST_DOUBLE)
|
||
|
||
/* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
|
||
and check its validity for a certain class.
|
||
We have two alternate definitions for each of them.
|
||
The usual definition accepts all pseudo regs; the other rejects
|
||
them unless they have been allocated suitable hard regs.
|
||
The symbol REG_OK_STRICT causes the latter definition to be used.
|
||
|
||
Most source files want to accept pseudo regs in the hope that
|
||
they will get allocated to the class that the insn wants them to be in.
|
||
Source files for reload pass need to be strict.
|
||
After reload, it makes no difference, since pseudo regs have
|
||
been eliminated by then. */
|
||
|
||
#ifndef REG_OK_STRICT
|
||
|
||
/* Nonzero if X is a hard reg that can be used as an index
|
||
or if it is a pseudo reg. */
|
||
#define REG_OK_FOR_INDEX_P(X) 0
|
||
/* Nonzero if X is a hard reg that can be used as a base reg
|
||
or if it is a pseudo reg. */
|
||
#define REG_OK_FOR_BASE_P(X) 1
|
||
|
||
#define REG_OK_FOR_INDEX_P_STRICT(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
|
||
#define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
|
||
|
||
#else
|
||
|
||
/* Nonzero if X is a hard reg that can be used as an index. */
|
||
#define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
|
||
/* Nonzero if X is a hard reg that can be used as a base reg. */
|
||
#define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
|
||
|
||
#endif
|
||
|
||
/* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
|
||
that is a valid memory address for an instruction.
|
||
The MODE argument is the machine mode for the MEM expression
|
||
that wants to use this address.
|
||
|
||
The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
|
||
except for CONSTANT_ADDRESS_P which is actually
|
||
machine-independent.
|
||
|
||
|
||
On the H8/300, a legitimate address has the form
|
||
REG, REG+CONSTANT_ADDRESS or CONSTANT_ADDRESS. */
|
||
|
||
/* Accept either REG or SUBREG where a register is valid. */
|
||
|
||
#define RTX_OK_FOR_BASE_P(X) \
|
||
((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
|
||
|| (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
|
||
&& REG_OK_FOR_BASE_P (SUBREG_REG (X))))
|
||
|
||
#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
|
||
if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
|
||
if (CONSTANT_ADDRESS_P (X)) goto ADDR; \
|
||
if (GET_CODE (X) == PLUS \
|
||
&& CONSTANT_ADDRESS_P (XEXP (X, 1)) \
|
||
&& RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR;
|
||
|
||
/* Try machine-dependent ways of modifying an illegitimate address
|
||
to be legitimate. If we find one, return the new, valid address.
|
||
This macro is used in only one place: `memory_address' in explow.c.
|
||
|
||
OLDX is the address as it was before break_out_memory_refs was called.
|
||
In some cases it is useful to look at this to decide what needs to be done.
|
||
|
||
MODE and WIN are passed so that this macro can use
|
||
GO_IF_LEGITIMATE_ADDRESS.
|
||
|
||
It is always safe for this macro to do nothing. It exists to recognize
|
||
opportunities to optimize the output.
|
||
|
||
For the H8/300, don't do anything. */
|
||
|
||
#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
|
||
|
||
/* Go to LABEL if ADDR (a legitimate address expression)
|
||
has an effect that depends on the machine mode it is used for.
|
||
|
||
On the H8/300, the predecrement and postincrement address depend thus
|
||
(the amount of decrement or increment being the length of the operand)
|
||
and all indexed address depend thus (because the index scale factor
|
||
is the length of the operand). */
|
||
|
||
#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
|
||
if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL;
|
||
|
||
/* Specify the machine mode that this machine uses
|
||
for the index in the tablejump instruction. */
|
||
#define CASE_VECTOR_MODE HImode
|
||
|
||
/* Define this if the case instruction expects the table
|
||
to contain offsets from the address of the table.
|
||
Do not define this if the table should contain absolute addresses. */
|
||
/*#define CASE_VECTOR_PC_RELATIVE*/
|
||
|
||
/* Define this if the case instruction drops through after the table
|
||
when the index is out of range. Don't define it if the case insn
|
||
jumps to the default label instead. */
|
||
#define CASE_DROPS_THROUGH
|
||
|
||
/* Specify the tree operation to be used to convert reals to integers. */
|
||
#define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
|
||
|
||
/* This is the kind of divide that is easiest to do in the general case. */
|
||
#define EASY_DIV_EXPR TRUNC_DIV_EXPR
|
||
|
||
/* Define this as 1 if `char' should by default be signed; else as 0.
|
||
|
||
On the H8/300, sign extension is expensive, so we'll say that chars
|
||
are unsigned. */
|
||
#define DEFAULT_SIGNED_CHAR 0
|
||
|
||
/* This flag, if defined, says the same insns that convert to a signed fixnum
|
||
also convert validly to an unsigned one. */
|
||
#define FIXUNS_TRUNC_LIKE_FIX_TRUNC
|
||
|
||
/* Max number of bytes we can move from memory to memory
|
||
in one reasonably fast instruction. */
|
||
#define MOVE_MAX 2
|
||
|
||
/* Define this if zero-extension is slow (more than one real instruction). */
|
||
/* #define SLOW_ZERO_EXTEND */
|
||
|
||
/* Nonzero if access to memory by bytes is slow and undesirable. */
|
||
#define SLOW_BYTE_ACCESS TARGET_SLOWBYTE
|
||
|
||
/* Define if shifts truncate the shift count
|
||
which implies one can omit a sign-extension or zero-extension
|
||
of a shift count. */
|
||
/* #define SHIFT_COUNT_TRUNCATED */
|
||
|
||
/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
|
||
is done just by pretending it is already truncated. */
|
||
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
|
||
|
||
/* Specify the machine mode that pointers have.
|
||
After generation of rtl, the compiler makes no further distinction
|
||
between pointers and any other objects of this machine mode. */
|
||
#define Pmode HImode
|
||
|
||
#define SIZE_TYPE "unsigned int"
|
||
#define PTRDIFF_TYPE "int"
|
||
|
||
/* A function address in a call instruction
|
||
is a byte address (for indexing purposes)
|
||
so give the MEM rtx a byte's mode. */
|
||
#define FUNCTION_MODE QImode
|
||
|
||
/* Compute the cost of computing a constant rtl expression RTX
|
||
whose rtx-code is CODE. The body of this macro is a portion
|
||
of a switch statement. If the code is computed here,
|
||
return it with a return statement. Otherwise, break from the switch. */
|
||
|
||
#define CONST_COSTS(RTX,CODE,OUTER_CODE) \
|
||
case CONST_INT: \
|
||
switch (INTVAL (RTX)) \
|
||
{ \
|
||
case 0: \
|
||
case 1: \
|
||
case 2: \
|
||
case -1: \
|
||
case -2: \
|
||
return 0; \
|
||
default: \
|
||
return 1; \
|
||
} \
|
||
case CONST: \
|
||
case LABEL_REF: \
|
||
case SYMBOL_REF: \
|
||
return 3; \
|
||
case CONST_DOUBLE: \
|
||
return 20;
|
||
|
||
#define BRANCH_COST 2
|
||
|
||
/* Provide the costs of a rtl expression. This is in the body of a
|
||
switch on CODE. */
|
||
|
||
#define RTX_COSTS(RTX,CODE,OUTER_CODE) \
|
||
case MOD: \
|
||
case DIV: \
|
||
return 60; \
|
||
case MULT: \
|
||
return 20; \
|
||
case LSHIFT: \
|
||
case ASHIFT: \
|
||
case ASHIFTRT: \
|
||
case LSHIFTRT: \
|
||
case ROTATE: \
|
||
case ROTATERT: \
|
||
if (GET_MODE (RTX) == HImode) \
|
||
return 2; \
|
||
return 10; \
|
||
|
||
/* Tell final.c how to eliminate redundant test instructions. */
|
||
|
||
/* Store in cc_status the expressions that the condition codes will describe
|
||
after execution of an instruction whose pattern is EXP. Do not
|
||
alter them if the instruction would not alter the cc's. */
|
||
|
||
#define NOTICE_UPDATE_CC(EXP, INSN) \
|
||
switch (get_attr_cc (INSN)) \
|
||
{ \
|
||
case CC_NONE: \
|
||
/* Insn does not affect the CC at all. */ \
|
||
break; \
|
||
case CC_NONE_0HIT: \
|
||
/* Insn does not change the CC, but the 0'th operand has been \
|
||
changed. */ \
|
||
if (cc_status.value1 != 0 \
|
||
&& reg_overlap_mentioned_p (recog_operand[0], cc_status.value1))\
|
||
cc_status.value1 = 0; \
|
||
\
|
||
if (cc_status.value2 != 0 \
|
||
&& reg_overlap_mentioned_p (recog_operand[0], cc_status.value2))\
|
||
cc_status.value2 = 0; \
|
||
break; \
|
||
case CC_SET: \
|
||
/* Insn sets CC to recog_operand[0], but overflow is impossible. */\
|
||
CC_STATUS_INIT; \
|
||
cc_status.flags |= CC_NO_OVERFLOW; \
|
||
cc_status.value1 = recog_operand[0]; \
|
||
break; \
|
||
case CC_COMPARE: \
|
||
/* The insn is a compare instruction. */ \
|
||
CC_STATUS_INIT; \
|
||
cc_status.value1 = recog_operand[0]; \
|
||
cc_status.value1 = recog_operand[1]; \
|
||
break; \
|
||
case CC_WHOOPS: \
|
||
case CC_CLOBBER: \
|
||
/* Insn clobbers CC. */ \
|
||
CC_STATUS_INIT; \
|
||
break; \
|
||
} \
|
||
|
||
#define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \
|
||
{ \
|
||
if (cc_status.flags & CC_NO_OVERFLOW) \
|
||
return NO_OV; \
|
||
return NORMAL; \
|
||
}
|
||
|
||
/* Control the assembler format that we output. */
|
||
|
||
#define ASM_IDENTIFY_GCC /* nothing */
|
||
|
||
/* Output at beginning of assembler file. */
|
||
#define ASM_FILE_START(FILE) \
|
||
{ \
|
||
fprintf (FILE, ";\tGCC For the Hitachi H8/300\n"); \
|
||
if (optimize) \
|
||
fprintf (FILE, "; -O%d\n", optimize); \
|
||
fprintf (FILE, "\n\n"); \
|
||
output_file_directive (FILE, main_input_filename); \
|
||
}
|
||
|
||
#define ASM_FILE_END(FILE) \
|
||
fprintf (FILE, "\t.end\n");
|
||
|
||
/* Output to assembler file text saying following lines
|
||
may contain character constants, extra white space, comments, etc. */
|
||
|
||
#define ASM_APP_ON "; #APP\n"
|
||
|
||
/* Output to assembler file text saying following lines
|
||
no longer contain unusual constructs. */
|
||
|
||
#define ASM_APP_OFF "; #NO_APP\n"
|
||
|
||
#define FILE_ASM_OP "\t.file\n"
|
||
#define IDENT_ASM_OP "\t.ident\n"
|
||
|
||
/* Output before read-only data. */
|
||
|
||
#define TEXT_SECTION_ASM_OP "\t.section .text"
|
||
#define DATA_SECTION_ASM_OP "\t.section .data"
|
||
#define BSS_SECTION_ASM_OP "\t.section .bss"
|
||
|
||
#define EXTRA_SECTIONS in_user
|
||
|
||
#define EXTRA_SECTION_FUNCTIONS \
|
||
void \
|
||
user_section (name) \
|
||
char *name; \
|
||
{ \
|
||
fprintf (asm_out_file, "\t.section\t%s\n", name); \
|
||
in_section = in_user; \
|
||
}
|
||
|
||
#define MAX_TEXT_ALIGN 16
|
||
|
||
/* How to refer to registers in assembler output.
|
||
This sequence is indexed by compiler's hard-register-number (see above). */
|
||
|
||
#define REGISTER_NAMES \
|
||
{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ap"}
|
||
|
||
/* How to renumber registers for dbx and gdb.
|
||
H8/300 needs no change in the numeration. */
|
||
|
||
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
|
||
|
||
/* This is how to output the definition of a user-level label named NAME,
|
||
such as the label on a static function or variable NAME. */
|
||
#define SDB_DEBUGGING_INFO
|
||
#define SDB_DELIM "\n"
|
||
|
||
#define ASM_OUTPUT_LABEL(FILE,NAME) \
|
||
do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
|
||
|
||
/*#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) */
|
||
|
||
/* This is how to output a command to make the user-level label named NAME
|
||
defined for reference from other files. */
|
||
#define ASM_GLOBALIZE_LABEL(FILE,NAME) \
|
||
do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
|
||
|
||
/*#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
|
||
ASM_OUTPUT_LABEL(FILE, NAME); */
|
||
|
||
/* This is how to output a reference to a user-level label named NAME. */
|
||
#define ASM_OUTPUT_LABELREF(FILE, NAME) \
|
||
asm_output_labelref (FILE, NAME)
|
||
|
||
/* This is how to output an internal numbered label where
|
||
PREFIX is the class of label and NUM is the number within the class. */
|
||
|
||
#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
|
||
fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
|
||
|
||
/* This is how to store into the string LABEL
|
||
the symbol_ref name of an internal numbered label where
|
||
PREFIX is the class of label and NUM is the number within the class.
|
||
This is suitable for output with `assemble_name'. */
|
||
|
||
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
|
||
sprintf (LABEL, "*.%s%d", PREFIX, NUM)
|
||
|
||
/* This is how to output an assembler line defining a `double' constant.
|
||
It is .dfloat or .gfloat, depending. */
|
||
|
||
/*#define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
|
||
fprintf (FILE, "\t.double %.20e\n", (VALUE))*/
|
||
|
||
/* This is how to output an assembler line defining a `float' constant. */
|
||
#define ASM_OUTPUT_FLOAT(FILE, VALUE) \
|
||
fprintf (FILE, "\t.float %.20e\n", \
|
||
((VALUE) > 1e30 ? 1e30 \
|
||
: ((VALUE) < -1e30) ? -1e30 : (double) ((float) VALUE)));
|
||
|
||
/* This is how to output an assembler line defining an `int' constant. */
|
||
#define ASM_OUTPUT_INT(FILE, VALUE) \
|
||
( fprintf (FILE, "\t.long "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
/* Likewise for `char' and `short' constants. */
|
||
#define ASM_OUTPUT_CHAR(FILE, VALUE) \
|
||
( fprintf (FILE, "\t.byte "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
#define ASM_OUTPUT_SHORT(FILE, VALUE) \
|
||
( fprintf (FILE, "\t.word "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
/* This is how to output an assembler line for a numeric constant byte. */
|
||
#define ASM_OUTPUT_BYTE(FILE, VALUE) \
|
||
fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
|
||
|
||
/* This is how to output an insn to push a register on the stack.
|
||
It need not be very fast code. */
|
||
#define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
|
||
fprintf (FILE, "\tpush %s\n", reg_names[REGNO])
|
||
|
||
/* This is how to output an insn to pop a register from the stack.
|
||
It need not be very fast code. */
|
||
#define ASM_OUTPUT_REG_POP(FILE, REGNO) \
|
||
fprintf (FILE, "\tpop\t%s\n", reg_names[REGNO])
|
||
|
||
/* This is how to output an element of a case-vector that is absolute. */
|
||
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
|
||
asm_fprintf (FILE, "\t.word .L%d\n", VALUE)
|
||
|
||
/* This is how to output an element of a case-vector that is relative. */
|
||
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
|
||
fprintf (FILE, "\t.word.w .L%d-.L%d\n", VALUE, REL)
|
||
|
||
/* This is how to output an assembler line
|
||
that says to advance the location counter
|
||
to a multiple of 2**LOG bytes. */
|
||
#define ASM_OUTPUT_ALIGN(FILE, LOG) \
|
||
if ((LOG) != 0) \
|
||
fprintf (FILE, "\t.align %d\n", 1 << (LOG))
|
||
|
||
/* This is how to output an assembler line
|
||
that says to advance the location counter by SIZE bytes. */
|
||
#define ASM_OUTPUT_IDENT(FILE, NAME) \
|
||
fprintf (FILE, "%s\t \"%s\"\n", IDENT_ASM_OP, NAME)
|
||
|
||
#define ASM_OUTPUT_SKIP(FILE, SIZE) \
|
||
fprintf (FILE, "\t.space %d\n", (SIZE))
|
||
|
||
/* This says how to output an assembler line
|
||
to define a global common symbol. */
|
||
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
|
||
( fputs ("\t.comm ", (FILE)), \
|
||
assemble_name ((FILE), (NAME)), \
|
||
fprintf ((FILE), ",%d\n", (SIZE)))
|
||
|
||
/* This says how to output an assembler line
|
||
to define a local common symbol. */
|
||
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
|
||
( fputs ("\t.lcomm ", (FILE)), \
|
||
assemble_name ((FILE), (NAME)), \
|
||
fprintf ((FILE), ",%d\n", (SIZE)))
|
||
|
||
/* Store in OUTPUT a string (made with alloca) containing
|
||
an assembler-name for a local static variable named NAME.
|
||
LABELNO is an integer which is different for each call. */
|
||
|
||
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
|
||
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
|
||
sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
|
||
|
||
/* Define the parentheses used to group arithmetic operations
|
||
in assembler code. */
|
||
|
||
#define ASM_OPEN_PAREN "("
|
||
#define ASM_CLOSE_PAREN ")"
|
||
|
||
/* Define results of standard character escape sequences. */
|
||
#define TARGET_BELL 007
|
||
#define TARGET_BS 010
|
||
#define TARGET_TAB 011
|
||
#define TARGET_NEWLINE 012
|
||
#define TARGET_VT 013
|
||
#define TARGET_FF 014
|
||
#define TARGET_CR 015
|
||
|
||
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
|
||
((CODE) == '#')
|
||
|
||
#define PRINT_OPERAND(FILE, X, CODE) \
|
||
print_operand (FILE, X, CODE)
|
||
|
||
/* Print a memory operand whose address is X, on file FILE.
|
||
This uses a function in h8300.c. */
|
||
|
||
#define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
|
||
print_operand_address (FILE, ADDR)
|
||
|
||
#define HANDLE_PRAGMA(FILE) handle_pragma (FILE)
|
||
|
||
#define FINAL_PRESCAN_INSN(insn, operand, nop) \
|
||
final_prescan_insn (insn, operand, nop)
|
||
|
||
/* Define this macro if GNU CC should generate calls to the System V
|
||
(and ANSI C) library functions `memcpy' and `memset' rather than
|
||
the BSD functions `bcopy' and `bzero'. */
|
||
#define TARGET_MEM_FUNCTIONS 1
|
||
|
||
/* Define subroutines to call to handle various operations not
|
||
supported in the hardware */
|
||
|
||
#define DIVHI3_LIBCALL "__divhi3"
|
||
#define UDIVHI3_LIBCALL "__udivhi3"
|
||
#define MULHI3_LIBCALL "__mulhi3"
|
||
#define MODHI3_LIBCALL "__modhi3"
|
||
#define UMODHI3_LIBCALL "__umodhi3"
|
||
#define ADDSI3_LIBCALL "__addsi3"
|
||
#define SUBSI3_LIBCALL "__subsi3"
|
||
|
||
#define MOVE_RATIO 3
|
||
|
||
#if 0
|
||
/* This stuff doesn't work currently. */
|
||
#undef SELECT_SECTION
|
||
#define SELECT_SECTION(DECL,RELOC) select_section(DECL, RELOC)
|
||
#define SELECT_FUNCTION_SECTION(a,b) SELECT_SECTION(a,b)
|
||
#endif
|