1471 lines
59 KiB
C++
1471 lines
59 KiB
C++
/* Definitions of target machine for GNU compiler.
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Motorola 68HC11 and 68HC12.
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Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
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Free Software Foundation, Inc.
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Contributed by Stephane Carrez (stcarrez@nerim.fr)
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This file is part of GCC.
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GCC 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 3, or (at your option)
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any later version.
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GCC 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 GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>.
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Note:
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A first 68HC11 port was made by Otto Lind (otto@coactive.com)
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on gcc 2.6.3. I have used it as a starting point for this port.
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However, this new port is a complete re-write. Its internal
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design is completely different. The generated code is not
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compatible with the gcc 2.6.3 port.
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The gcc 2.6.3 port is available at:
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ftp.unina.it/pub/electronics/motorola/68hc11/gcc/gcc-6811-fsf.tar.gz
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*/
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/*****************************************************************************
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**
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** Controlling the Compilation Driver, `gcc'
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**
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*****************************************************************************/
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#undef ENDFILE_SPEC
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/* Compile and assemble for a 68hc11 unless there is a -m68hc12 option. */
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#ifndef ASM_SPEC
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#define ASM_SPEC \
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"%{m68hc12:-m68hc12}" \
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"%{m68hcs12:-m68hcs12}" \
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"%{!m68hc12:%{!m68hcs12:-m68hc11}} " \
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"%{mshort:-mshort}%{!mshort:-mlong} " \
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"%{fshort-double:-mshort-double}%{!fshort-double:-mlong-double}"
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#endif
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/* We need to tell the linker the target elf format. Just pass an
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emulation option. This can be overridden by -Wl option of gcc. */
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#ifndef LINK_SPEC
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#define LINK_SPEC \
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"%{m68hc12:-m m68hc12elf}" \
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"%{m68hcs12:-m m68hc12elf}" \
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"%{!m68hc12:%{!m68hcs12:-m m68hc11elf}} " \
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"%{!mnorelax:%{!m68hc12:%{!m68hcs12:-relax}}}"
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#endif
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#ifndef LIB_SPEC
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#define LIB_SPEC ""
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#endif
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#ifndef CC1_SPEC
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#define CC1_SPEC ""
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#endif
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#ifndef CPP_SPEC
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#define CPP_SPEC \
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"%{mshort:-D__HAVE_SHORT_INT__ -D__INT__=16}\
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%{!mshort:-D__INT__=32}\
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%{m68hc12:-Dmc6812 -DMC6812 -Dmc68hc12}\
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%{m68hcs12:-Dmc6812 -DMC6812 -Dmc68hcs12}\
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%{!m68hc12:%{!m68hcs12:-Dmc6811 -DMC6811 -Dmc68hc11}}\
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%{fshort-double:-D__HAVE_SHORT_DOUBLE__}\
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%{mlong-calls:-D__USE_RTC__}"
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#endif
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC "crt1%O%s"
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/* Names to predefine in the preprocessor for this target machine. */
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#define TARGET_CPU_CPP_BUILTINS() \
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do \
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{ \
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builtin_define_std ("mc68hc1x"); \
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} \
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while (0)
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/* As an embedded target, we have no libc. */
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#ifndef inhibit_libc
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# define inhibit_libc
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#endif
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/* Forward type declaration for prototypes definitions.
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rtx_ptr is equivalent to rtx. Can't use the same name. */
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struct rtx_def;
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typedef struct rtx_def *rtx_ptr;
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union tree_node;
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typedef union tree_node *tree_ptr;
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/* We can't declare enum machine_mode forward nor include 'machmode.h' here.
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Prototypes defined here will use an int instead. It's better than no
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prototype at all. */
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typedef int enum_machine_mode;
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/*****************************************************************************
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**
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** Run-time Target Specification
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**
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*****************************************************************************/
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/* Run-time compilation parameters selecting different hardware subsets. */
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extern short *reg_renumber; /* def in local_alloc.c */
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#define TARGET_OP_TIME (optimize && optimize_size == 0)
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#define TARGET_RELAX (TARGET_NO_DIRECT_MODE)
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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 this macro as a C expression for the initializer of an
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array of string to tell the driver program which options are
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defaults for this target and thus do not need to be handled
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specially when using `MULTILIB_OPTIONS'. */
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#ifndef MULTILIB_DEFAULTS
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# if TARGET_DEFAULT & MASK_M6811
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# define MULTILIB_DEFAULTS { "m68hc11" }
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# else
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# define MULTILIB_DEFAULTS { "m68hc12" }
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# endif
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#endif
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/* Print subsidiary information on the compiler version in use. */
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#define TARGET_VERSION fprintf (stderr, " (MC68HC11/MC68HC12/MC68HCS12)")
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/* Sometimes certain combinations of command options do not make
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sense on a particular target machine. You can define a macro
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`OVERRIDE_OPTIONS' to take account of this. This macro, if
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defined, is executed once just after all the command options have
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been parsed.
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Don't use this macro to turn on various extra optimizations for
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`-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
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#define OVERRIDE_OPTIONS m68hc11_override_options ()
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/* Define cost parameters for a given processor variant. */
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struct processor_costs {
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const int add; /* cost of an add instruction */
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const int logical; /* cost of a logical instruction */
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const int shift_var;
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const int shiftQI_const[8];
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const int shiftHI_const[16];
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const int multQI;
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const int multHI;
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const int multSI;
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const int divQI;
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const int divHI;
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const int divSI;
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};
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/* Costs for the current processor. */
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extern const struct processor_costs *m68hc11_cost;
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/* target machine storage layout */
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/* Define this if most significant byte of a word is the lowest numbered. */
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#define BYTES_BIG_ENDIAN 1
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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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#define BITS_BIG_ENDIAN 0
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/* Define this if most significant word of a multiword number is numbered. */
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#define WORDS_BIG_ENDIAN 1
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/* Width of a word, in units (bytes). */
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#define UNITS_PER_WORD 2
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/* Definition of size_t. This is really an unsigned short as the
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68hc11 only handles a 64K address space. */
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#define SIZE_TYPE "short unsigned int"
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/* A C expression for a string describing the name of the data type
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to use for the result of subtracting two pointers. The typedef
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name `ptrdiff_t' is defined using the contents of the string.
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The 68hc11 only has a 64K address space. */
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#define PTRDIFF_TYPE "short int"
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/* Allocation boundary (bits) for storing pointers in memory. */
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#define POINTER_BOUNDARY 8
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/* Normal alignment required for function parameters on the stack, in bits.
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This can't be less than BITS_PER_WORD */
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#define PARM_BOUNDARY (BITS_PER_WORD)
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/* Boundary (bits) on which stack pointer should be aligned. */
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#define STACK_BOUNDARY 8
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/* Allocation boundary (bits) for the code of a function. */
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#define FUNCTION_BOUNDARY 8
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#define BIGGEST_ALIGNMENT 8
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/* Alignment of field after `int : 0' in a structure. */
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#define EMPTY_FIELD_BOUNDARY 8
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/* Every structure's size must be a multiple of this. */
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#define STRUCTURE_SIZE_BOUNDARY 8
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/* Define this if instructions will fail to work if given data not
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on the nominal alignment. If instructions will merely go slower
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in that case, do not define this macro. */
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#define STRICT_ALIGNMENT 0
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/* An integer expression for the size in bits of the largest integer
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machine mode that should actually be used. All integer machine modes of
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this size or smaller can be used for structures and unions with the
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appropriate sizes. */
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#define MAX_FIXED_MODE_SIZE 64
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/* target machine storage layout */
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/* Size (bits) of the type "int" on target machine
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(If undefined, default is BITS_PER_WORD). */
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#define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32)
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/* Size (bits) of the type "short" on target machine */
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#define SHORT_TYPE_SIZE 16
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/* Size (bits) of the type "long" on target machine */
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#define LONG_TYPE_SIZE 32
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/* Size (bits) of the type "long long" on target machine */
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#define LONG_LONG_TYPE_SIZE 64
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/* A C expression for the size in bits of the type `float' on the
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target machine. If you don't define this, the default is one word.
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Don't use default: a word is only 16. */
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#define FLOAT_TYPE_SIZE 32
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/* A C expression for the size in bits of the type double on the target
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machine. If you don't define this, the default is two words.
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Be IEEE compliant. */
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#define DOUBLE_TYPE_SIZE 64
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#define LONG_DOUBLE_TYPE_SIZE 64
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/* Define this as 1 if `char' should by default be signed; else as 0. */
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#define DEFAULT_SIGNED_CHAR 0
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/* Define these to avoid dependence on meaning of `int'.
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Note that WCHAR_TYPE_SIZE is used in cexp.y,
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where TARGET_SHORT is not available. */
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#define WCHAR_TYPE "short int"
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#define WCHAR_TYPE_SIZE 16
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/* Standard register usage. */
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#define HARD_REG_SIZE (UNITS_PER_WORD)
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/* Assign names to real MC68HC11 registers.
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A and B registers are not really used (A+B = D)
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X register is first so that GCC allocates X+D for 32-bit integers and
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the lowpart of that integer will be D. Having the lower part in D is
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better for 32<->16bit conversions and for many arithmetic operations. */
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#define HARD_X_REGNUM 0
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#define HARD_D_REGNUM 1
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#define HARD_Y_REGNUM 2
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#define HARD_SP_REGNUM 3
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#define HARD_PC_REGNUM 4
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#define HARD_A_REGNUM 5
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#define HARD_B_REGNUM 6
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#define HARD_CCR_REGNUM 7
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/* The Z register does not really exist in the 68HC11. This a fake register
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for GCC. It is treated exactly as an index register (X or Y). It is only
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in the A_REGS class, which is the BASE_REG_CLASS for GCC. Defining this
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register helps the reload pass of GCC. Otherwise, the reload often dies
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with register spill failures.
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The Z register is replaced by either X or Y during the machine specific
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reorg (m68hc11_reorg). It is saved in the SOFT_Z_REGNUM soft-register
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when this is necessary.
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It's possible to tell GCC not to use this register with -ffixed-z. */
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#define HARD_Z_REGNUM 8
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/* The frame pointer is a soft-register. It's treated as such by GCC:
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it is not and must not be part of the BASE_REG_CLASS. */
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#define DEFAULT_HARD_FP_REGNUM (9)
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#define HARD_FP_REGNUM (9)
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#define HARD_AP_REGNUM (HARD_FP_REGNUM)
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/* Temporary soft-register used in some cases when an operand came
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up into a bad register class (D, X, Y, SP) and gcc failed to
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recognize this. This register is never allocated by GCC. */
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#define SOFT_TMP_REGNUM 10
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/* The soft-register which is used to save the Z register
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(see Z register replacement notes in m68hc11.c). */
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#define SOFT_Z_REGNUM 11
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/* The soft-register which is used to save either X or Y. */
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#define SOFT_SAVED_XY_REGNUM 12
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/* A fake clobber register for 68HC12 patterns. */
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#define FAKE_CLOBBER_REGNUM (13)
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/* Define 32 soft-registers of 16-bit each. By default,
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only 12 of them are enabled and can be used by GCC. The
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-msoft-reg-count=<n> option allows to control the number of valid
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soft-registers. GCC can put 32-bit values in them
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by allocating consecutive registers. The first 3 soft-registers
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are never allocated by GCC. They are used in case the insn template needs
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a temporary register, or for the Z register replacement. */
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#define MAX_SOFT_REG_COUNT (32)
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#define SOFT_REG_FIXED 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 1, 1, 1, 1, \
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1, 1, 1, 1, 1, 1, 1, 1, \
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1, 1, 1, 1, 1, 1, 1, 1
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#define SOFT_REG_USED 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 1, 1, 1, 1, \
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1, 1, 1, 1, 1, 1, 1, 1, \
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1, 1, 1, 1, 1, 1, 1, 1
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#define SOFT_REG_ORDER \
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SOFT_REG_FIRST, SOFT_REG_FIRST+1,SOFT_REG_FIRST+2,SOFT_REG_FIRST+3,\
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SOFT_REG_FIRST+4, SOFT_REG_FIRST+5,SOFT_REG_FIRST+6,SOFT_REG_FIRST+7,\
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SOFT_REG_FIRST+8, SOFT_REG_FIRST+9,SOFT_REG_FIRST+10,SOFT_REG_FIRST+11,\
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SOFT_REG_FIRST+12, SOFT_REG_FIRST+13,SOFT_REG_FIRST+14,SOFT_REG_FIRST+15,\
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SOFT_REG_FIRST+16, SOFT_REG_FIRST+17,SOFT_REG_FIRST+18,SOFT_REG_FIRST+19,\
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SOFT_REG_FIRST+20, SOFT_REG_FIRST+21,SOFT_REG_FIRST+22,SOFT_REG_FIRST+23,\
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SOFT_REG_FIRST+24, SOFT_REG_FIRST+25,SOFT_REG_FIRST+26,SOFT_REG_FIRST+27,\
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SOFT_REG_FIRST+28, SOFT_REG_FIRST+29,SOFT_REG_FIRST+30,SOFT_REG_FIRST+31
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#define SOFT_REG_NAMES \
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"*_.d1", "*_.d2", "*_.d3", "*_.d4", \
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"*_.d5", "*_.d6", "*_.d7", "*_.d8", \
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"*_.d9", "*_.d10", "*_.d11", "*_.d12", \
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"*_.d13", "*_.d14", "*_.d15", "*_.d16", \
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"*_.d17", "*_.d18", "*_.d19", "*_.d20", \
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"*_.d21", "*_.d22", "*_.d23", "*_.d24", \
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"*_.d25", "*_.d26", "*_.d27", "*_.d28", \
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"*_.d29", "*_.d30", "*_.d31", "*_.d32"
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/* First available soft-register for GCC. */
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#define SOFT_REG_FIRST (SOFT_SAVED_XY_REGNUM+2)
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/* Last available soft-register for GCC. */
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#define SOFT_REG_LAST (SOFT_REG_FIRST+MAX_SOFT_REG_COUNT)
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#define SOFT_FP_REGNUM (SOFT_REG_LAST)
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#define SOFT_AP_REGNUM (SOFT_FP_REGNUM+1)
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/* Number of actual hardware registers. The hardware registers are assigned
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numbers for the compiler from 0 to just below FIRST_PSEUDO_REGISTER.
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All registers that the compiler knows about must be given numbers, even
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those that are not normally considered general registers. */
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#define FIRST_PSEUDO_REGISTER (SOFT_REG_LAST+2)
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/* 1 for registers that have pervasive standard uses and are not available
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for the register allocator. */
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#define FIXED_REGISTERS \
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{0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1,1, 1, SOFT_REG_FIXED, 1, 1}
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/* X, D, Y, SP,PC,A, B, CCR, Z, FP,ZTMP,ZR,XYR, FK, D1 - D32, SOFT-FP, AP */
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/* 1 for registers not available across function calls. For our pseudo
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registers, all are available. */
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#define CALL_USED_REGISTERS \
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{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,1, 1, SOFT_REG_USED, 1, 1}
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/* X, D, Y, SP,PC,A, B, CCR, Z, FP, ZTMP,ZR,XYR, D1 - 32, SOFT-FP, AP */
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/* Define this macro to change register usage conditional on target flags.
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The soft-registers are disabled or enabled according to the
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-msoft-reg-count=<n> option. */
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#define CONDITIONAL_REGISTER_USAGE (m68hc11_conditional_register_usage ())
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/* List the order in which to allocate registers. Each register must be
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listed once, even those in FIXED_REGISTERS. */
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#define REG_ALLOC_ORDER \
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{ HARD_D_REGNUM, HARD_X_REGNUM, HARD_Y_REGNUM, \
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SOFT_REG_ORDER, HARD_Z_REGNUM, HARD_PC_REGNUM, HARD_A_REGNUM, \
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HARD_B_REGNUM, HARD_CCR_REGNUM, HARD_FP_REGNUM, SOFT_FP_REGNUM, \
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HARD_SP_REGNUM, SOFT_TMP_REGNUM, SOFT_Z_REGNUM, SOFT_SAVED_XY_REGNUM, \
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SOFT_AP_REGNUM, FAKE_CLOBBER_REGNUM }
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/* A C expression for the number of consecutive hard registers,
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starting at register number REGNO, required to hold a value of
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mode MODE. */
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#define HARD_REGNO_NREGS(REGNO, MODE) \
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((Q_REGNO_P (REGNO)) ? (GET_MODE_SIZE (MODE)) : \
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((GET_MODE_SIZE (MODE) + HARD_REG_SIZE - 1) / HARD_REG_SIZE))
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/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
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- 8-bit values are stored anywhere (except the SP register).
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- 16-bit values can be stored in any register whose mode is 16
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- 32-bit values can be stored in D, X registers or in a soft register
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(except the last one because we need 2 soft registers)
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- Values whose size is > 32 bit are not stored in real hard
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registers. They may be stored in soft registers if there are
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enough of them. */
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#define HARD_REGNO_MODE_OK(REGNO, MODE) \
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hard_regno_mode_ok (REGNO,MODE)
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/* Value is 1 if it is a good idea to tie two pseudo registers when one has
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mode MODE1 and one has mode MODE2. If HARD_REGNO_MODE_OK could produce
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different values for MODE1 and MODE2, for any hard reg, then this must be
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0 for correct output.
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All modes are tieable except QImode. */
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#define MODES_TIEABLE_P(MODE1, MODE2) \
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(((MODE1) == (MODE2)) \
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|| ((MODE1) != QImode && (MODE2) != QImode))
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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,
|
||
a larger-numbered class must never be contained completely
|
||
in a smaller-numbered class.
|
||
|
||
For any two classes, it is very desirable that there be another
|
||
class that represents their union. */
|
||
|
||
/* The M68hc11 has so few registers that it's not possible for GCC to
|
||
do any register allocation without breaking. We extend the processor
|
||
registers by having soft registers. These registers are treated as
|
||
hard registers by GCC but they are located in memory and accessed by page0
|
||
accesses (IND mode). */
|
||
enum reg_class
|
||
{
|
||
NO_REGS,
|
||
D_REGS, /* 16-bit data register */
|
||
X_REGS, /* 16-bit X register */
|
||
Y_REGS, /* 16-bit Y register */
|
||
SP_REGS, /* 16-bit stack pointer */
|
||
DA_REGS, /* 8-bit A reg. */
|
||
DB_REGS, /* 8-bit B reg. */
|
||
Z_REGS, /* 16-bit fake Z register */
|
||
D8_REGS, /* 8-bit A or B reg. */
|
||
Q_REGS, /* 8-bit (byte (QI)) data (A, B or D) */
|
||
D_OR_X_REGS, /* D or X register */
|
||
D_OR_Y_REGS, /* D or Y register */
|
||
D_OR_SP_REGS, /* D or SP register */
|
||
X_OR_Y_REGS, /* IX or Y register */
|
||
A_REGS, /* 16-bit address register (X, Y, Z) */
|
||
X_OR_SP_REGS, /* X or SP register */
|
||
Y_OR_SP_REGS, /* Y or SP register */
|
||
X_OR_Y_OR_D_REGS, /* X, Y or D */
|
||
A_OR_D_REGS, /* X, Y, Z or D */
|
||
A_OR_SP_REGS, /* X, Y, Z or SP */
|
||
H_REGS, /* 16-bit hard register (D, X, Y, Z, SP) */
|
||
S_REGS, /* 16-bit soft register */
|
||
D_OR_S_REGS, /* 16-bit soft register or D register */
|
||
X_OR_S_REGS, /* 16-bit soft register or X register */
|
||
Y_OR_S_REGS, /* 16-bit soft register or Y register */
|
||
Z_OR_S_REGS, /* 16-bit soft register or Z register */
|
||
SP_OR_S_REGS, /* 16-bit soft register or SP register */
|
||
D_OR_X_OR_S_REGS, /* 16-bit soft register or D or X register */
|
||
D_OR_Y_OR_S_REGS, /* 16-bit soft register or D or Y register */
|
||
D_OR_SP_OR_S_REGS, /* 16-bit soft register or D or SP register */
|
||
A_OR_S_REGS, /* 16-bit soft register or X, Y registers */
|
||
D_OR_A_OR_S_REGS, /* 16-bit soft register or D, X, Y registers */
|
||
TMP_REGS, /* 16-bit fake scratch register */
|
||
D_OR_A_OR_TMP_REGS, /* General scratch register */
|
||
G_REGS, /* 16-bit general register
|
||
(H_REGS + soft registers) */
|
||
ALL_REGS,
|
||
LIM_REG_CLASSES
|
||
};
|
||
|
||
/* alias GENERAL_REGS to G_REGS. */
|
||
#define GENERAL_REGS G_REGS
|
||
|
||
#define N_REG_CLASSES (int) LIM_REG_CLASSES
|
||
|
||
/* Give names of register classes as strings for dump file. */
|
||
#define REG_CLASS_NAMES \
|
||
{ "NO_REGS", \
|
||
"D_REGS", \
|
||
"X_REGS", \
|
||
"Y_REGS", \
|
||
"SP_REGS", \
|
||
"DA_REGS", \
|
||
"DB_REGS", \
|
||
"D8_REGS", \
|
||
"Z_REGS", \
|
||
"Q_REGS", \
|
||
"D_OR_X_REGS", \
|
||
"D_OR_Y_REGS", \
|
||
"D_OR_SP_REGS", \
|
||
"X_OR_Y_REGS", \
|
||
"A_REGS", \
|
||
"X_OR_SP_REGS", \
|
||
"Y_OR_SP_REGS", \
|
||
"X_OR_Y_OR_D_REGS", \
|
||
"A_OR_D_REGS", \
|
||
"A_OR_SP_REGS", \
|
||
"H_REGS", \
|
||
"S_REGS", \
|
||
"D_OR_S_REGS", \
|
||
"X_OR_S_REGS", \
|
||
"Y_OR_S_REGS", \
|
||
"Z_OR_S_REGS", \
|
||
"SP_OR_S_REGS", \
|
||
"D_OR_X_OR_S_REGS", \
|
||
"D_OR_Y_OR_S_REGS", \
|
||
"D_OR_SP_OR_S_REGS", \
|
||
"A_OR_S_REGS", \
|
||
"D_OR_A_OR_S_REGS", \
|
||
"TMP_REGS", \
|
||
"D_OR_A_OR_TMP_REGS", \
|
||
"G_REGS", \
|
||
"ALL_REGS" }
|
||
|
||
/* An initializer containing the contents of the register classes,
|
||
as integers which are bit masks. The Nth integer specifies the
|
||
contents of class N. The way the integer MASK is interpreted is
|
||
that register R is in the class if `MASK & (1 << R)' is 1. */
|
||
|
||
/*--------------------------------------------------------------
|
||
X 0x00000001
|
||
D 0x00000002
|
||
Y 0x00000004
|
||
SP 0x00000008
|
||
PC 0x00000010
|
||
A 0x00000020
|
||
B 0x00000040
|
||
CCR 0x00000080
|
||
Z 0x00000100
|
||
FRAME 0x00000200
|
||
ZTMP 0x00000400
|
||
ZREG 0x00000800
|
||
XYREG 0x00001000
|
||
FAKE 0x00002000
|
||
Di 0xFFFFc000, 0x03FFF
|
||
SFRAME 0x00000000, 0x04000
|
||
AP 0x00000000, 0x08000
|
||
|
||
D_OR_X_REGS represents D+X. It is used for 32-bits numbers.
|
||
A_REGS represents a valid base register for indexing. It represents
|
||
X,Y and the Z register.
|
||
S_REGS represents the soft-registers. This includes the hard frame
|
||
and soft frame registers.
|
||
--------------------------------------------------------------*/
|
||
|
||
#define REG_CLASS_CONTENTS \
|
||
/* NO_REGS */ {{ 0x00000000, 0x00000000 }, \
|
||
/* D_REGS */ { 0x00000002, 0x00000000 }, /* D */ \
|
||
/* X_REGS */ { 0x00000001, 0x00000000 }, /* X */ \
|
||
/* Y_REGS */ { 0x00000004, 0x00000000 }, /* Y */ \
|
||
/* SP_REGS */ { 0x00000008, 0x00000000 }, /* SP */ \
|
||
/* DA_REGS */ { 0x00000020, 0x00000000 }, /* A */ \
|
||
/* DB_REGS */ { 0x00000040, 0x00000000 }, /* B */ \
|
||
/* Z_REGS */ { 0x00000100, 0x00000000 }, /* Z */ \
|
||
/* D8_REGS */ { 0x00000060, 0x00000000 }, /* A B */ \
|
||
/* Q_REGS */ { 0x00000062, 0x00000000 }, /* A B D */ \
|
||
/* D_OR_X_REGS */ { 0x00000003, 0x00000000 }, /* D X */ \
|
||
/* D_OR_Y_REGS */ { 0x00000006, 0x00000000 }, /* D Y */ \
|
||
/* D_OR_SP_REGS */ { 0x0000000A, 0x00000000 }, /* D SP */ \
|
||
/* X_OR_Y_REGS */ { 0x00000005, 0x00000000 }, /* X Y */ \
|
||
/* A_REGS */ { 0x00000105, 0x00000000 }, /* X Y Z */ \
|
||
/* X_OR_SP_REGS */ { 0x00000009, 0x00000000 }, /* X SP */ \
|
||
/* Y_OR_SP_REGS */ { 0x0000000C, 0x00000000 }, /* Y SP */ \
|
||
/* X_OR_Y_OR_D_REGS */ { 0x00000007, 0x00000000 }, /* D X Y */ \
|
||
/* A_OR_D_REGS */ { 0x00000107, 0x00000000 }, /* D X Y Z */ \
|
||
/* A_OR_SP_REGS */ { 0x0000010D, 0x00000000 }, /* X Y SP */ \
|
||
/* H_REGS */ { 0x0000010F, 0x00000000 }, /* D X Y SP */ \
|
||
/* S_REGS */ { 0xFFFFDE00, 0x00007FFF }, /* _.D,..,FP,Z* */ \
|
||
/* D_OR_S_REGS */ { 0xFFFFDE02, 0x00007FFF }, /* D _.D */ \
|
||
/* X_OR_S_REGS */ { 0xFFFFDE01, 0x00007FFF }, /* X _.D */ \
|
||
/* Y_OR_S_REGS */ { 0xFFFFDE04, 0x00007FFF }, /* Y _.D */ \
|
||
/* Z_OR_S_REGS */ { 0xFFFFDF00, 0x00007FFF }, /* Z _.D */ \
|
||
/* SP_OR_S_REGS */ { 0xFFFFDE08, 0x00007FFF }, /* SP _.D */ \
|
||
/* D_OR_X_OR_S_REGS */ { 0xFFFFDE03, 0x00007FFF }, /* D X _.D */ \
|
||
/* D_OR_Y_OR_S_REGS */ { 0xFFFFDE06, 0x00007FFF }, /* D Y _.D */ \
|
||
/* D_OR_SP_OR_S_REGS */ { 0xFFFFDE0A, 0x00007FFF }, /* D SP _.D */ \
|
||
/* A_OR_S_REGS */ { 0xFFFFDF05, 0x00007FFF }, /* X Y _.D */ \
|
||
/* D_OR_A_OR_S_REGS */ { 0xFFFFDF07, 0x00007FFF }, /* D X Y _.D */ \
|
||
/* TMP_REGS */ { 0x00002000, 0x00000000 }, /* FAKE */ \
|
||
/* D_OR_A_OR_TMP_REGS*/ { 0x00002107, 0x00000000 }, /* D X Y Z Fake */ \
|
||
/* G_REGS */ { 0xFFFFFF1F, 0x00007FFF }, /* ? _.D D X Y */ \
|
||
/* ALL_REGS*/ { 0xFFFFFFFF, 0x00007FFF }}
|
||
|
||
|
||
/* set up a C expression whose value is a register class containing hard
|
||
register REGNO */
|
||
#define Q_REGNO_P(REGNO) ((REGNO) == HARD_A_REGNUM \
|
||
|| (REGNO) == HARD_B_REGNUM)
|
||
#define Q_REG_P(X) (REG_P (X) && Q_REGNO_P (REGNO (X)))
|
||
|
||
#define D_REGNO_P(REGNO) ((REGNO) == HARD_D_REGNUM)
|
||
#define D_REG_P(X) (REG_P (X) && D_REGNO_P (REGNO (X)))
|
||
|
||
#define DB_REGNO_P(REGNO) ((REGNO) == HARD_B_REGNUM)
|
||
#define DB_REG_P(X) (REG_P (X) && DB_REGNO_P (REGNO (X)))
|
||
#define DA_REGNO_P(REGNO) ((REGNO) == HARD_A_REGNUM)
|
||
#define DA_REG_P(X) (REG_P (X) && DA_REGNO_P (REGNO (X)))
|
||
|
||
#define X_REGNO_P(REGNO) ((REGNO) == HARD_X_REGNUM)
|
||
#define X_REG_P(X) (REG_P (X) && X_REGNO_P (REGNO (X)))
|
||
|
||
#define Y_REGNO_P(REGNO) ((REGNO) == HARD_Y_REGNUM)
|
||
#define Y_REG_P(X) (REG_P (X) && Y_REGNO_P (REGNO (X)))
|
||
|
||
#define Z_REGNO_P(REGNO) ((REGNO) == HARD_Z_REGNUM)
|
||
#define Z_REG_P(X) (REG_P (X) && Z_REGNO_P (REGNO (X)))
|
||
|
||
#define SP_REGNO_P(REGNO) ((REGNO) == HARD_SP_REGNUM)
|
||
#define SP_REG_P(X) (REG_P (X) && SP_REGNO_P (REGNO (X)))
|
||
|
||
/* Address register. */
|
||
#define A_REGNO_P(REGNO) ((REGNO) == HARD_X_REGNUM \
|
||
|| (REGNO) == HARD_Y_REGNUM \
|
||
|| (REGNO) == HARD_Z_REGNUM)
|
||
#define A_REG_P(X) (REG_P (X) && A_REGNO_P (REGNO (X)))
|
||
|
||
/* M68hc11 hard registers. */
|
||
#define H_REGNO_P(REGNO) (D_REGNO_P (REGNO) || A_REGNO_P (REGNO) \
|
||
|| SP_REGNO_P (REGNO) || Q_REGNO_P (REGNO))
|
||
#define H_REG_P(X) (REG_P (X) && H_REGNO_P (REGNO (X)))
|
||
|
||
#define FAKE_REGNO_P(REGNO) ((REGNO) == FAKE_CLOBBER_REGNUM)
|
||
#define FAKE_REG_P(X) (REG_P (X) && FAKE_REGNO_P (REGNO (X)))
|
||
|
||
/* Soft registers (or register emulation for gcc). The temporary register
|
||
used by insn template must be part of the S_REGS class so that it
|
||
matches the 'u' constraint. */
|
||
#define S_REGNO_P(REGNO) ((REGNO) >= SOFT_TMP_REGNUM \
|
||
&& (REGNO) <= SOFT_REG_LAST \
|
||
&& (REGNO) != FAKE_CLOBBER_REGNUM)
|
||
#define S_REG_P(X) (REG_P (X) && S_REGNO_P (REGNO (X)))
|
||
|
||
#define Z_REGNO_P(REGNO) ((REGNO) == HARD_Z_REGNUM)
|
||
#define Z_REG_P(X) (REG_P (X) && Z_REGNO_P (REGNO (X)))
|
||
|
||
/* General register. */
|
||
#define G_REGNO_P(REGNO) (H_REGNO_P (REGNO) || S_REGNO_P (REGNO) \
|
||
|| ((REGNO) == HARD_PC_REGNUM) \
|
||
|| ((REGNO) == HARD_FP_REGNUM) \
|
||
|| ((REGNO) == SOFT_FP_REGNUM) \
|
||
|| ((REGNO) == FAKE_CLOBBER_REGNUM) \
|
||
|| ((REGNO) == SOFT_AP_REGNUM))
|
||
|
||
#define G_REG_P(X) (REG_P (X) && G_REGNO_P (REGNO (X)))
|
||
|
||
#define REGNO_REG_CLASS(REGNO) \
|
||
(D_REGNO_P (REGNO) ? D_REGS : \
|
||
(X_REGNO_P (REGNO) ? X_REGS : \
|
||
(Y_REGNO_P (REGNO) ? Y_REGS : \
|
||
(SP_REGNO_P (REGNO) ? SP_REGS : \
|
||
(Z_REGNO_P (REGNO) ? Z_REGS : \
|
||
(H_REGNO_P (REGNO) ? H_REGS : \
|
||
(FAKE_REGNO_P (REGNO) ? TMP_REGS : \
|
||
(S_REGNO_P (REGNO) ? S_REGS : \
|
||
(DA_REGNO_P (REGNO) ? DA_REGS: \
|
||
(DB_REGNO_P (REGNO) ? DB_REGS: \
|
||
(G_REGNO_P (REGNO) ? G_REGS : ALL_REGS)))))))))))
|
||
|
||
|
||
/* Get reg_class from a letter in the machine description. */
|
||
|
||
extern enum reg_class m68hc11_tmp_regs_class;
|
||
#define REG_CLASS_FROM_LETTER(C) \
|
||
((C) == 'a' ? DA_REGS : \
|
||
(C) == 'A' ? A_REGS : \
|
||
(C) == 'b' ? DB_REGS : \
|
||
(C) == 'B' ? X_OR_Y_REGS : \
|
||
(C) == 'd' ? D_REGS : \
|
||
(C) == 'D' ? D_OR_X_REGS : \
|
||
(C) == 'q' ? Q_REGS : \
|
||
(C) == 'h' ? H_REGS : \
|
||
(C) == 't' ? TMP_REGS : \
|
||
(C) == 'u' ? S_REGS : \
|
||
(C) == 'v' ? m68hc11_tmp_regs_class : \
|
||
(C) == 'w' ? SP_REGS : \
|
||
(C) == 'x' ? X_REGS : \
|
||
(C) == 'y' ? Y_REGS : \
|
||
(C) == 'z' ? Z_REGS : NO_REGS)
|
||
|
||
#define PREFERRED_RELOAD_CLASS(X,CLASS) preferred_reload_class(X,CLASS)
|
||
|
||
#define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
|
||
|
||
/* A C expression that is nonzero if hard register number REGNO2 can be
|
||
considered for use as a rename register for REGNO1 */
|
||
|
||
#define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) \
|
||
m68hc11_hard_regno_rename_ok ((REGNO1), (REGNO2))
|
||
|
||
/* A C expression whose value is nonzero if pseudos that have been
|
||
assigned to registers of class CLASS would likely be spilled
|
||
because registers of CLASS are needed for spill registers.
|
||
|
||
The default value of this macro returns 1 if CLASS has exactly one
|
||
register and zero otherwise. On most machines, this default
|
||
should be used. Only define this macro to some other expression
|
||
if pseudo allocated by `local-alloc.c' end up in memory because
|
||
their hard registers were needed for spill registers. If this
|
||
macro returns nonzero for those classes, those pseudos will only
|
||
be allocated by `global.c', which knows how to reallocate the
|
||
pseudo to another register. If there would not be another
|
||
register available for reallocation, you should not change the
|
||
definition of this macro since the only effect of such a
|
||
definition would be to slow down register allocation. */
|
||
|
||
#define CLASS_LIKELY_SPILLED_P(CLASS) \
|
||
(((CLASS) == D_REGS) \
|
||
|| ((CLASS) == X_REGS) \
|
||
|| ((CLASS) == Y_REGS) \
|
||
|| ((CLASS) == A_REGS) \
|
||
|| ((CLASS) == SP_REGS) \
|
||
|| ((CLASS) == D_OR_X_REGS) \
|
||
|| ((CLASS) == D_OR_Y_REGS) \
|
||
|| ((CLASS) == X_OR_SP_REGS) \
|
||
|| ((CLASS) == Y_OR_SP_REGS) \
|
||
|| ((CLASS) == D_OR_SP_REGS))
|
||
|
||
/* Return the maximum number of consecutive registers needed to represent
|
||
mode MODE in a register of class CLASS. */
|
||
#define CLASS_MAX_NREGS(CLASS, MODE) \
|
||
(((CLASS) == DA_REGS || (CLASS) == DB_REGS \
|
||
|| (CLASS) == D8_REGS || (CLASS) == Q_REGS) ? GET_MODE_SIZE (MODE) \
|
||
: ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
|
||
|
||
/* The letters I, J, K, L and M in a register constraint string
|
||
can be used to stand for particular ranges of immediate operands.
|
||
This macro defines what the ranges are.
|
||
C is the letter, and VALUE is a constant value.
|
||
Return 1 if VALUE is in the range specified by C.
|
||
|
||
`K' is for 0.
|
||
`L' is for range -65536 to 65536
|
||
`M' is for values whose 16-bit low part is 0
|
||
'N' is for +1 or -1.
|
||
'O' is for 16 (for rotate using swap).
|
||
'P' is for range -8 to 2 (used by addhi_sp)
|
||
|
||
'I', 'J' are not used. */
|
||
|
||
#define CONST_OK_FOR_LETTER_P(VALUE, C) \
|
||
((C) == 'K' ? (VALUE) == 0 : \
|
||
(C) == 'L' ? ((VALUE) >= -65536 && (VALUE) <= 65535) : \
|
||
(C) == 'M' ? ((VALUE) & 0x0ffffL) == 0 : \
|
||
(C) == 'N' ? ((VALUE) == 1 || (VALUE) == -1) : \
|
||
(C) == 'I' ? ((VALUE) >= -2 && (VALUE) <= 2) : \
|
||
(C) == 'O' ? (VALUE) == 16 : \
|
||
(C) == 'P' ? ((VALUE) <= 2 && (VALUE) >= -8) : 0)
|
||
|
||
/* Similar, but for floating constants, and defining letters G and H.
|
||
|
||
`G' is for 0.0. */
|
||
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
|
||
((C) == 'G' ? (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
|
||
&& VALUE == CONST0_RTX (GET_MODE (VALUE))) : 0)
|
||
|
||
/* 'U' represents certain kind of memory indexed operand for 68HC12.
|
||
and any memory operand for 68HC11.
|
||
'R' represents indexed addressing mode or access to page0 for 68HC11.
|
||
For 68HC12, it represents any memory operand. */
|
||
#define EXTRA_CONSTRAINT(OP, C) \
|
||
((C) == 'U' ? m68hc11_small_indexed_indirect_p (OP, GET_MODE (OP)) \
|
||
: (C) == 'Q' ? m68hc11_symbolic_p (OP, GET_MODE (OP)) \
|
||
: (C) == 'R' ? m68hc11_indirect_p (OP, GET_MODE (OP)) \
|
||
: (C) == 'S' ? (memory_operand (OP, GET_MODE (OP)) \
|
||
&& non_push_operand (OP, GET_MODE (OP))) : 0)
|
||
|
||
|
||
/* 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 to 0 for 68HC11, the frame pointer is the bottom
|
||
of local variables. */
|
||
#define FRAME_GROWS_DOWNWARD 0
|
||
|
||
/* Define this if successive arguments to a function occupy decreasing
|
||
addresses in the stack. */
|
||
/* #define ARGS_GROW_DOWNWARD */
|
||
|
||
/* Offset within stack frame to start allocating local variables at.
|
||
If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
|
||
first local allocated. Otherwise, it is the offset to the BEGINNING
|
||
of the first local allocated. */
|
||
#define STARTING_FRAME_OFFSET 0
|
||
|
||
/* Offset of first parameter from the argument pointer register value. */
|
||
|
||
#define FIRST_PARM_OFFSET(FNDECL) 2
|
||
|
||
/* After the prologue, RA is at 0(AP) in the current frame. */
|
||
#define RETURN_ADDR_RTX(COUNT, FRAME) \
|
||
((COUNT) == 0 \
|
||
? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
|
||
: 0)
|
||
|
||
/* Before the prologue, the top of the frame is at 2(sp). */
|
||
#define INCOMING_FRAME_SP_OFFSET 2
|
||
|
||
/* Define this if functions should assume that stack space has been
|
||
allocated for arguments even when their values are passed in
|
||
registers.
|
||
|
||
The value of this macro is the size, in bytes, of the area reserved for
|
||
arguments passed in registers.
|
||
|
||
This space can either be allocated by the caller or be a part of the
|
||
machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE'
|
||
says which. */
|
||
/* #define REG_PARM_STACK_SPACE(FNDECL) 2 */
|
||
|
||
/* Define this macro if REG_PARM_STACK_SPACE is defined but stack
|
||
parameters don't skip the area specified by REG_PARM_STACK_SPACE.
|
||
Normally, when a parameter is not passed in registers, it is placed on
|
||
the stack beyond the REG_PARM_STACK_SPACE area. Defining this macro
|
||
suppresses this behavior and causes the parameter to be passed on the
|
||
stack in its natural location. */
|
||
/* #define STACK_PARMS_IN_REG_PARM_AREA */
|
||
|
||
/* Register to use for pushing function arguments. */
|
||
#define STACK_POINTER_REGNUM HARD_SP_REGNUM
|
||
|
||
/* Base register for access to local variables of the function. */
|
||
#define FRAME_POINTER_REGNUM SOFT_FP_REGNUM
|
||
|
||
#define HARD_FRAME_POINTER_REGNUM HARD_FP_REGNUM
|
||
|
||
/* Base register for access to arguments of the function. */
|
||
#define ARG_POINTER_REGNUM SOFT_AP_REGNUM
|
||
|
||
/* Register in which static-chain is passed to a function. */
|
||
#define STATIC_CHAIN_REGNUM SOFT_Z_REGNUM
|
||
|
||
|
||
/* Definitions for register eliminations.
|
||
|
||
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.
|
||
|
||
We have two registers that are eliminated on the 6811. The pseudo arg
|
||
pointer and pseudo frame pointer registers can always be eliminated;
|
||
they are replaced with either the stack or the real frame pointer. */
|
||
|
||
#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}}
|
||
|
||
/* 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 = m68hc11_initial_elimination_offset (FROM, TO); }
|
||
|
||
|
||
/* Passing Function Arguments on the Stack. */
|
||
|
||
/* If we generate an insn to push BYTES bytes, this says how many the
|
||
stack pointer really advances by. No rounding or alignment needed
|
||
for MC6811. */
|
||
#define PUSH_ROUNDING(BYTES) (BYTES)
|
||
|
||
/* Value is 1 if returning from a function call automatically pops the
|
||
arguments described by the number-of-args field in the call. FUNTYPE is
|
||
the data type of the function (as a tree), or for a library call it is
|
||
an identifier node for the subroutine name.
|
||
|
||
The standard MC6811 call, with arg count word, includes popping the
|
||
args as part of the call template. */
|
||
#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
|
||
|
||
/* Passing Arguments in Registers. */
|
||
|
||
/* 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. */
|
||
|
||
typedef struct m68hc11_args
|
||
{
|
||
int words;
|
||
int nregs;
|
||
} CUMULATIVE_ARGS;
|
||
|
||
/* If defined, a C expression which determines whether, and in which direction,
|
||
to pad out an argument with extra space. The value should be of type
|
||
`enum direction': either `upward' to pad above the argument,
|
||
`downward' to pad below, or `none' to inhibit padding.
|
||
|
||
Structures are stored left shifted in their argument slot. */
|
||
#define FUNCTION_ARG_PADDING(MODE, TYPE) \
|
||
m68hc11_function_arg_padding ((MODE), (TYPE))
|
||
|
||
#undef PAD_VARARGS_DOWN
|
||
#define PAD_VARARGS_DOWN \
|
||
(m68hc11_function_arg_padding (TYPE_MODE (type), type) == downward)
|
||
|
||
/* 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) \
|
||
(m68hc11_init_cumulative_args (&CUM, FNTYPE, LIBNAME))
|
||
|
||
/* 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) \
|
||
(m68hc11_function_arg_advance (&CUM, MODE, TYPE, NAMED))
|
||
|
||
/* 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). */
|
||
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
|
||
(m68hc11_function_arg (&CUM, MODE, TYPE, NAMED))
|
||
|
||
/* Define the profitability of saving registers around calls.
|
||
|
||
Disable this because the saving instructions generated by
|
||
caller-save need a reload and the way it is implemented,
|
||
it forbids all spill registers at that point. Enabling
|
||
caller saving results in spill failure. */
|
||
#define CALLER_SAVE_PROFITABLE(REFS,CALLS) 0
|
||
|
||
/* 1 if N is a possible register number for function argument passing.
|
||
D is for 16-bit values, X is for 32-bit (X+D). */
|
||
#define FUNCTION_ARG_REGNO_P(N) \
|
||
(((N) == HARD_D_REGNUM) || ((N) == HARD_X_REGNUM))
|
||
|
||
/* All return values are in the D or X+D registers:
|
||
- 8 and 16-bit values are returned in D.
|
||
BLKmode are passed in D as pointer.
|
||
- 32-bit values are returned in X + D.
|
||
The high part is passed in X and the low part in D.
|
||
For GCC, the register number must be HARD_X_REGNUM. */
|
||
#define FUNCTION_VALUE(VALTYPE, FUNC) \
|
||
gen_rtx_REG (TYPE_MODE (VALTYPE), \
|
||
((TYPE_MODE (VALTYPE) == BLKmode \
|
||
|| GET_MODE_SIZE (TYPE_MODE (VALTYPE)) <= 2) \
|
||
? HARD_D_REGNUM : HARD_X_REGNUM))
|
||
|
||
#define LIBCALL_VALUE(MODE) \
|
||
gen_rtx_REG (MODE, \
|
||
(((MODE) == BLKmode || GET_MODE_SIZE (MODE) <= 2) \
|
||
? HARD_D_REGNUM : HARD_X_REGNUM))
|
||
|
||
/* 1 if N is a possible register number for a function value. */
|
||
#define FUNCTION_VALUE_REGNO_P(N) \
|
||
((N) == HARD_D_REGNUM || (N) == HARD_X_REGNUM)
|
||
|
||
/* 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
|
||
|
||
|
||
/* Generating Code for Profiling. */
|
||
|
||
/* Output assembler code to FILE to increment profiler label # LABELNO
|
||
for profiling a function entry. */
|
||
#define FUNCTION_PROFILER(FILE, LABELNO) \
|
||
fprintf (FILE, "\tldy\t.LP%d\n\tjsr mcount\n", (LABELNO))
|
||
|
||
/* Length in units of the trampoline for entering a nested function. */
|
||
#define TRAMPOLINE_SIZE (TARGET_M6811 ? 11 : 9)
|
||
|
||
|
||
/* Addressing modes, and classification of registers for them. */
|
||
|
||
#define ADDR_STRICT 0x01 /* Accept only registers in class A_REGS */
|
||
#define ADDR_INCDEC 0x02 /* Post/Pre inc/dec */
|
||
#define ADDR_INDEXED 0x04 /* D-reg index */
|
||
#define ADDR_OFFSET 0x08
|
||
#define ADDR_INDIRECT 0x10 /* Accept (mem (mem ...)) for [n,X] */
|
||
#define ADDR_CONST 0x20 /* Accept const and symbol_ref */
|
||
|
||
/* The 68HC12 has all the post/pre increment/decrement modes. */
|
||
#define HAVE_POST_INCREMENT (TARGET_M6812 && TARGET_AUTO_INC_DEC)
|
||
#define HAVE_PRE_INCREMENT (TARGET_M6812 && TARGET_AUTO_INC_DEC)
|
||
#define HAVE_POST_DECREMENT (TARGET_M6812 && TARGET_AUTO_INC_DEC)
|
||
#define HAVE_PRE_DECREMENT (TARGET_M6812 && TARGET_AUTO_INC_DEC)
|
||
|
||
/* The class value for base registers. This depends on the target:
|
||
A_REGS for 68HC11 and A_OR_SP_REGS for 68HC12. The class value
|
||
is stored at init time. */
|
||
extern enum reg_class m68hc11_base_reg_class;
|
||
#define BASE_REG_CLASS m68hc11_base_reg_class
|
||
|
||
/* The class value for index registers. This is NO_REGS for 68HC11. */
|
||
|
||
extern enum reg_class m68hc11_index_reg_class;
|
||
#define INDEX_REG_CLASS m68hc11_index_reg_class
|
||
|
||
/* 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. */
|
||
|
||
|
||
extern unsigned char m68hc11_reg_valid_for_base[FIRST_PSEUDO_REGISTER];
|
||
#define REG_VALID_FOR_BASE_P(REGNO) \
|
||
((REGNO) < FIRST_PSEUDO_REGISTER \
|
||
&& m68hc11_reg_valid_for_base[REGNO])
|
||
|
||
/* Internal macro, return 1 if REGNO is a valid index register. */
|
||
extern unsigned char m68hc11_reg_valid_for_index[FIRST_PSEUDO_REGISTER];
|
||
#define REG_VALID_FOR_INDEX_P(REGNO) \
|
||
((REGNO) < FIRST_PSEUDO_REGISTER \
|
||
&& m68hc11_reg_valid_for_index[REGNO])
|
||
|
||
/* Internal macro, the nonstrict definition for REGNO_OK_FOR_BASE_P. */
|
||
#define REGNO_OK_FOR_BASE_NONSTRICT_P(REGNO) \
|
||
((REGNO) >= FIRST_PSEUDO_REGISTER \
|
||
|| REG_VALID_FOR_BASE_P (REGNO) \
|
||
|| (REGNO) == FRAME_POINTER_REGNUM \
|
||
|| (REGNO) == HARD_FRAME_POINTER_REGNUM \
|
||
|| (REGNO) == ARG_POINTER_REGNUM \
|
||
|| (reg_renumber && REG_VALID_FOR_BASE_P (reg_renumber[REGNO])))
|
||
|
||
/* Internal macro, the nonstrict definition for REGNO_OK_FOR_INDEX_P. */
|
||
#define REGNO_OK_FOR_INDEX_NONSTRICT_P(REGNO) \
|
||
(TARGET_M6812 \
|
||
&& ((REGNO) >= FIRST_PSEUDO_REGISTER \
|
||
|| REG_VALID_FOR_INDEX_P (REGNO) \
|
||
|| (reg_renumber && REG_VALID_FOR_INDEX_P (reg_renumber[REGNO]))))
|
||
|
||
/* Internal macro, the strict definition for REGNO_OK_FOR_BASE_P. */
|
||
#define REGNO_OK_FOR_BASE_STRICT_P(REGNO) \
|
||
((REGNO) < FIRST_PSEUDO_REGISTER ? REG_VALID_FOR_BASE_P (REGNO) \
|
||
: (reg_renumber && REG_VALID_FOR_BASE_P (reg_renumber[REGNO])))
|
||
|
||
/* Internal macro, the strict definition for REGNO_OK_FOR_INDEX_P. */
|
||
#define REGNO_OK_FOR_INDEX_STRICT_P(REGNO) \
|
||
(TARGET_M6812 \
|
||
&& ((REGNO) < FIRST_PSEUDO_REGISTER ? REG_VALID_FOR_INDEX_P (REGNO) \
|
||
: (reg_renumber && REG_VALID_FOR_INDEX_P (reg_renumber[REGNO]))))
|
||
|
||
#define REGNO_OK_FOR_BASE_P2(REGNO,STRICT) \
|
||
((STRICT) ? (REGNO_OK_FOR_BASE_STRICT_P (REGNO)) \
|
||
: (REGNO_OK_FOR_BASE_NONSTRICT_P (REGNO)))
|
||
|
||
#define REGNO_OK_FOR_INDEX_P2(REGNO,STRICT) \
|
||
((STRICT) ? (REGNO_OK_FOR_INDEX_STRICT_P (REGNO)) \
|
||
: (REGNO_OK_FOR_INDEX_NONSTRICT_P (REGNO)))
|
||
|
||
#define REGNO_OK_FOR_BASE_P(REGNO) REGNO_OK_FOR_BASE_STRICT_P (REGNO)
|
||
#define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_INDEX_STRICT_P (REGNO)
|
||
|
||
#define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_STRICT_P (REGNO (X))
|
||
#define REG_OK_FOR_BASE_NONSTRICT_P(X) REGNO_OK_FOR_BASE_NONSTRICT_P (REGNO (X))
|
||
#define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_STRICT_P (REGNO (X))
|
||
#define REG_OK_FOR_INDEX_NONSTRICT_P(X) REGNO_OK_FOR_INDEX_NONSTRICT_P (REGNO (X))
|
||
|
||
/* see PUSH_POP_ADDRESS_P() below for an explanation of this. */
|
||
#define IS_STACK_PUSH(operand) \
|
||
((GET_CODE (operand) == MEM) \
|
||
&& (GET_CODE (XEXP (operand, 0)) == PRE_DEC) \
|
||
&& (SP_REG_P (XEXP (XEXP (operand, 0), 0))))
|
||
|
||
#define IS_STACK_POP(operand) \
|
||
((GET_CODE (operand) == MEM) \
|
||
&& (GET_CODE (XEXP (operand, 0)) == POST_INC) \
|
||
&& (SP_REG_P (XEXP (XEXP (operand, 0), 0))))
|
||
|
||
/* Maximum number of registers that can appear in a valid memory address */
|
||
#define MAX_REGS_PER_ADDRESS 2
|
||
|
||
/* TARGET_LEGITIMATE_ADDRESS_P 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. */
|
||
|
||
/*--------------------------------------------------------------
|
||
Valid addresses are either direct or indirect (MEM) versions
|
||
of the following forms:
|
||
constant N
|
||
register ,X
|
||
indexed N,X
|
||
--------------------------------------------------------------*/
|
||
|
||
/* The range of index that is allowed by indirect addressing. */
|
||
|
||
#define VALID_MIN_OFFSET m68hc11_min_offset
|
||
#define VALID_MAX_OFFSET m68hc11_max_offset
|
||
|
||
/* The offset values which are allowed by the n,x and n,y addressing modes.
|
||
Take into account the size of the mode because we may have to add
|
||
a mode offset to access the lowest part of the data.
|
||
(For example, for an SImode, the last valid offset is 252.) */
|
||
#define VALID_CONSTANT_OFFSET_P(X,MODE) \
|
||
(((GET_CODE (X) == CONST_INT) && \
|
||
((INTVAL (X) >= VALID_MIN_OFFSET) \
|
||
&& ((INTVAL (X) <= VALID_MAX_OFFSET \
|
||
- (HOST_WIDE_INT) (GET_MODE_SIZE (MODE) + 1))))) \
|
||
|| (TARGET_M6812 \
|
||
&& ((GET_CODE (X) == SYMBOL_REF) \
|
||
|| GET_CODE (X) == LABEL_REF \
|
||
|| GET_CODE (X) == CONST)))
|
||
|
||
/* This is included to allow stack push/pop operations. Special hacks in the
|
||
md and m6811.c files exist to support this. */
|
||
#define PUSH_POP_ADDRESS_P(X) \
|
||
(((GET_CODE (X) == PRE_DEC) || (GET_CODE (X) == POST_INC)) \
|
||
&& SP_REG_P (XEXP (X, 0)))
|
||
|
||
/* 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 a base reg. */
|
||
#define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P(X)
|
||
|
||
/* Nonzero if X is a hard reg that can be used as an index. */
|
||
#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P(X)
|
||
#else
|
||
#define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P(X)
|
||
#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P(X)
|
||
#endif
|
||
|
||
|
||
/* 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) 1
|
||
|
||
|
||
/* Tell final.c how to eliminate redundant test instructions. */
|
||
|
||
#define NOTICE_UPDATE_CC(EXP, INSN) \
|
||
m68hc11_notice_update_cc ((EXP), (INSN))
|
||
|
||
/* Move costs between classes of registers */
|
||
#define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \
|
||
(m68hc11_register_move_cost (MODE, CLASS1, CLASS2))
|
||
|
||
/* Move cost between register and memory.
|
||
- Move to a 16-bit register is reasonable,
|
||
- Move to a soft register can be expensive. */
|
||
#define MEMORY_MOVE_COST(MODE,CLASS,IN) \
|
||
m68hc11_memory_move_cost ((MODE),(CLASS),(IN))
|
||
|
||
/* A C expression for the cost of a branch instruction. A value of 1
|
||
is the default; other values are interpreted relative to that.
|
||
|
||
Pretend branches are cheap because GCC generates sub-optimal code
|
||
for the default value. */
|
||
#define BRANCH_COST(speed_p, predictable_p) 0
|
||
|
||
/* Nonzero if access to memory by bytes is slow and undesirable. */
|
||
#define SLOW_BYTE_ACCESS 0
|
||
|
||
/* It is as good to call a constant function address as to call an address
|
||
kept in a register. */
|
||
#define NO_FUNCTION_CSE
|
||
|
||
/* 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.
|
||
|
||
For M68HC11, we handle large displacements of a base register
|
||
by splitting the addend across an addhi3 insn.
|
||
|
||
For M68HC12, the 64K offset range is available.
|
||
*/
|
||
|
||
#define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN) \
|
||
do { \
|
||
/* We must recognize output that we have already generated ourselves. */ \
|
||
if (GET_CODE (X) == PLUS \
|
||
&& GET_CODE (XEXP (X, 0)) == PLUS \
|
||
&& GET_CODE (XEXP (XEXP (X, 0), 0)) == REG \
|
||
&& GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
|
||
&& GET_CODE (XEXP (X, 1)) == CONST_INT) \
|
||
{ \
|
||
push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
|
||
BASE_REG_CLASS, GET_MODE (X), VOIDmode, 0, 0, \
|
||
OPNUM, TYPE); \
|
||
goto WIN; \
|
||
} \
|
||
if (GET_CODE (X) == PLUS \
|
||
&& GET_CODE (XEXP (X, 0)) == REG \
|
||
&& GET_CODE (XEXP (X, 1)) == CONST_INT \
|
||
&& !VALID_CONSTANT_OFFSET_P (XEXP (X, 1), MODE)) \
|
||
{ \
|
||
HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
|
||
HOST_WIDE_INT low, high; \
|
||
high = val & (~0x0FF); \
|
||
low = val & 0x00FF; \
|
||
if (low >= 256-15) { high += 16; low -= 16; } \
|
||
/* Reload the high part into a base reg; leave the low part \
|
||
in the mem directly. */ \
|
||
\
|
||
X = gen_rtx_PLUS (Pmode, \
|
||
gen_rtx_PLUS (Pmode, XEXP (X, 0), \
|
||
GEN_INT (high)), \
|
||
GEN_INT (low)); \
|
||
\
|
||
push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
|
||
BASE_REG_CLASS, GET_MODE (X), VOIDmode, 0, 0, \
|
||
OPNUM, TYPE); \
|
||
goto WIN; \
|
||
} \
|
||
} while (0)
|
||
|
||
|
||
/* Defining the Output Assembler Language. */
|
||
|
||
/* A default list of other sections which we might be "in" at any given
|
||
time. For targets that use additional sections (e.g. .tdesc) you
|
||
should override this definition in the target-specific file which
|
||
includes this file. */
|
||
|
||
/* Output before read-only data. */
|
||
#define TEXT_SECTION_ASM_OP ("\t.sect\t.text")
|
||
|
||
/* Output before writable data. */
|
||
#define DATA_SECTION_ASM_OP ("\t.sect\t.data")
|
||
|
||
/* Output before uninitialized data. */
|
||
#define BSS_SECTION_ASM_OP ("\t.sect\t.bss")
|
||
|
||
/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
|
||
|
||
Same as config/elfos.h but don't mark these section SHF_WRITE since
|
||
there is no shared library problem. */
|
||
#undef CTORS_SECTION_ASM_OP
|
||
#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\""
|
||
|
||
#undef DTORS_SECTION_ASM_OP
|
||
#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\""
|
||
|
||
#define TARGET_ASM_CONSTRUCTOR m68hc11_asm_out_constructor
|
||
#define TARGET_ASM_DESTRUCTOR m68hc11_asm_out_destructor
|
||
|
||
/* Comment character */
|
||
#define ASM_COMMENT_START ";"
|
||
|
||
/* Output to assembler file text saying following lines
|
||
may contain character constants, extra white space, comments, etc. */
|
||
#define ASM_APP_ON "; Begin inline assembler code\n#APP\n"
|
||
|
||
/* Output to assembler file text saying following lines
|
||
no longer contain unusual constructs. */
|
||
#define ASM_APP_OFF "; End of inline assembler code\n#NO_APP\n"
|
||
|
||
/* Write the extra assembler code needed to declare a function properly.
|
||
Some svr4 assemblers need to also have something extra said about the
|
||
function's return value. We allow for that here.
|
||
|
||
For 68HC12 we mark functions that return with 'rtc'. The linker
|
||
will ensure that a 'call' is really made (instead of 'jsr').
|
||
The debugger needs this information to correctly compute the stack frame.
|
||
|
||
For 68HC11/68HC12 we also mark interrupt handlers for gdb to
|
||
compute the correct stack frame. */
|
||
|
||
#undef ASM_DECLARE_FUNCTION_NAME
|
||
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
|
||
do \
|
||
{ \
|
||
fprintf (FILE, "%s", TYPE_ASM_OP); \
|
||
assemble_name (FILE, NAME); \
|
||
putc (',', FILE); \
|
||
fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
|
||
putc ('\n', FILE); \
|
||
\
|
||
if (current_function_far) \
|
||
{ \
|
||
fprintf (FILE, "\t.far\t"); \
|
||
assemble_name (FILE, NAME); \
|
||
putc ('\n', FILE); \
|
||
} \
|
||
else if (current_function_interrupt \
|
||
|| current_function_trap) \
|
||
{ \
|
||
fprintf (FILE, "\t.interrupt\t"); \
|
||
assemble_name (FILE, NAME); \
|
||
putc ('\n', FILE); \
|
||
} \
|
||
ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
|
||
ASM_OUTPUT_LABEL(FILE, NAME); \
|
||
} \
|
||
while (0)
|
||
|
||
/* Output #ident as a .ident. */
|
||
|
||
/* output external reference */
|
||
#undef ASM_OUTPUT_EXTERNAL
|
||
#define ASM_OUTPUT_EXTERNAL(FILE,DECL,NAME) \
|
||
{fputs ("\t; extern\t", FILE); \
|
||
assemble_name (FILE, NAME); \
|
||
fputs ("\n", FILE);}
|
||
|
||
/* How to refer to registers in assembler output. This sequence is indexed
|
||
by compiler's hard-register-number (see above). */
|
||
#define REGISTER_NAMES \
|
||
{ "x", "d", "y", "sp", "pc", "a", "b", "ccr", "z", \
|
||
"*_.frame", "*_.tmp", "*_.z", "*_.xy", "*fake clobber", \
|
||
SOFT_REG_NAMES, "*sframe", "*ap"}
|
||
|
||
/* Print an instruction operand X on file FILE. CODE is the code from the
|
||
%-spec for printing this operand. If `%z3' was used to print operand
|
||
3, then CODE is 'z'. */
|
||
|
||
#define PRINT_OPERAND(FILE, X, CODE) \
|
||
print_operand (FILE, X, CODE)
|
||
|
||
/* Print a memory operand whose address is X, on file FILE. */
|
||
#define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
|
||
print_operand_address (FILE, ADDR)
|
||
|
||
/* This is how to output an insn to push/pop a register on the stack.
|
||
It need not be very fast code.
|
||
|
||
Don't define because we don't know how to handle that with
|
||
the STATIC_CHAIN_REGNUM (soft register). Saving the static
|
||
chain must be made inside FUNCTION_PROFILER. */
|
||
|
||
#undef ASM_OUTPUT_REG_PUSH
|
||
#undef ASM_OUTPUT_REG_POP
|
||
|
||
/* 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\tL%d-L%d\n", integer_asm_op (2, TRUE), VALUE, REL)
|
||
|
||
/* This is how to output an element of a case-vector that is absolute. */
|
||
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
|
||
fprintf (FILE, "\t%s\t.L%d\n", integer_asm_op (2, TRUE), 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) \
|
||
do { \
|
||
if ((LOG) > 1) \
|
||
fprintf ((FILE), "%s\n", ALIGN_ASM_OP); \
|
||
} while (0)
|
||
|
||
|
||
/* Assembler Commands for Exception Regions. */
|
||
|
||
/* Default values provided by GCC should be ok. Assuming that DWARF-2
|
||
frame unwind info is ok for this platform. */
|
||
|
||
#undef PREFERRED_DEBUGGING_TYPE
|
||
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
|
||
|
||
/* For the support of memory banks we need addresses that indicate
|
||
the page number. */
|
||
#define DWARF2_ADDR_SIZE 4
|
||
|
||
/* SCz 2003-07-08: Don't use as dwarf2 .file/.loc directives because
|
||
the linker is doing relaxation and it does not adjust the debug_line
|
||
sections when it shrinks the code. This results in invalid addresses
|
||
when debugging. This does not bless too much the HC11/HC12 as most
|
||
applications are embedded and small, hence a reasonable debug info.
|
||
This problem is known for binutils 2.13, 2.14 and mainline. */
|
||
#undef HAVE_AS_DWARF2_DEBUG_LINE
|
||
|
||
/* The prefix for local labels. You should be able to define this as
|
||
an empty string, or any arbitrary string (such as ".", ".L%", etc)
|
||
without having to make any other changes to account for the specific
|
||
definition. Note it is a string literal, not interpreted by printf
|
||
and friends. */
|
||
#define LOCAL_LABEL_PREFIX "."
|
||
|
||
/* The prefix for immediate operands. */
|
||
#define IMMEDIATE_PREFIX "#"
|
||
#define GLOBAL_ASM_OP "\t.globl\t"
|
||
|
||
|
||
/* Miscellaneous Parameters. */
|
||
|
||
/* Specify the machine mode that this machine uses
|
||
for the index in the tablejump instruction. */
|
||
#define CASE_VECTOR_MODE Pmode
|
||
|
||
/* 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
|
||
|
||
/* MOVE_RATIO is the number of move instructions that is better than a
|
||
block move. Make this small on 6811, since the code size grows very
|
||
large with each move. */
|
||
#define MOVE_RATIO(speed) 3
|
||
|
||
/* 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 1
|
||
|
||
/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
|
||
is done just by pretending it is already truncated. */
|
||
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
|
||
|
||
/* Specify the machine mode that pointers have. After generation of rtl, the
|
||
compiler makes no further distinction between pointers and any other
|
||
objects of this machine mode. */
|
||
#define Pmode HImode
|
||
|
||
/* 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
|
||
|
||
extern int debug_m6811;
|
||
extern int z_replacement_completed;
|
||
extern int current_function_interrupt;
|
||
extern int current_function_trap;
|
||
extern int current_function_far;
|
||
|
||
extern GTY(()) rtx m68hc11_soft_tmp_reg;
|
||
extern GTY(()) rtx ix_reg;
|
||
extern GTY(()) rtx iy_reg;
|
||
extern GTY(()) rtx d_reg;
|