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jeremybenn |
/* Target Definitions for moxie.
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Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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Contributed by Anthony Green.
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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 it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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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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#ifndef GCC_MOXIE_H
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#define GCC_MOXIE_H
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/* This is defined by svr4.h, which is included prior to this file.
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However, we should undefine it for moxie-elf, since we don't provide
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functions like access() and mkdir() in newlib. This will have to
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be defined again for a Linux port. */
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#undef TARGET_POSIX_IO
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/* Another C string constant used much like `LINK_SPEC'. The difference
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between the two is that `STARTFILE_SPEC' is used at the very beginning of
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the command given to the linker.
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If this macro is not defined, a default is provided that loads the standard
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C startup file from the usual place. See `gcc.c'.
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Defined in svr4.h. */
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC "crt0%O%s crti.o%s crtbegin.o%s"
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/* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
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magical crtend.o file (see crtstuff.c) which provides part of the
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support for getting C++ file-scope static object constructed before
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entering `main', followed by the normal svr3/svr4 "finalizer" file,
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which is either `gcrtn.o' or `crtn.o'. */
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
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/* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
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standard C library (unless we are building a shared library) and
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the simulator BSP code. */
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#undef LIB_SPEC
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#define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
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/* Layout of Source Language Data Types */
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#define INT_TYPE_SIZE 32
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#define SHORT_TYPE_SIZE 16
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#define LONG_TYPE_SIZE 32
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#define LONG_LONG_TYPE_SIZE 64
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#define FLOAT_TYPE_SIZE 32
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#define DOUBLE_TYPE_SIZE 64
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#define LONG_DOUBLE_TYPE_SIZE 64
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#define DEFAULT_SIGNED_CHAR 1
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/* Registers...
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$fp - frame pointer
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$sp - stack pointer
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$r0 - general purpose 32-bit register.
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$r1 - general purpose 32-bit register.
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$r2 - general purpose 32-bit register.
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$r3 - general purpose 32-bit register.
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$r4 - general purpose 32-bit register.
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$r5 - general purpose 32-bit register.
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$r6 - general purpose 32-bit register.
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$r7 - general purpose 32-bit register.
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$r8 - general purpose 32-bit register.
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$r9 - general purpose 32-bit register.
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$r10 - general purpose 32-bit register.
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$r11 - general purpose 32-bit register.
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$r12 - general purpose 32-bit register.
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$r13 - reserved for execution environment.
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Special Registers...
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$pc - 32-bit program counter.
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*/
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#define REGISTER_NAMES { \
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"$fp", "$sp", "$r0", "$r1", \
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"$r2", "$r3", "$r4", "$r5", \
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"$r6", "$r7", "$r8", "$r9", \
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"$r10", "$r11", "$r12", "$r13", \
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"?fp", "?ap", "$pc", "?cc" }
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#define MOXIE_FP 0
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#define MOXIE_SP 1
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#define MOXIE_R0 2
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#define MOXIE_R1 3
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#define MOXIE_R2 4
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#define MOXIE_R3 5
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#define MOXIE_R4 6
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#define MOXIE_R5 7
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#define MOXIE_R6 8
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#define MOXIE_R7 9
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#define MOXIE_R8 10
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#define MOXIE_R9 11
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#define MOXIE_R10 12
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#define MOXIE_R11 13
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#define MOXIE_R12 14
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#define MOXIE_R13 15
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#define MOXIE_QFP 16
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#define MOXIE_QAP 17
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#define MOXIE_PC 18
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#define MOXIE_CC 19
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#define FIRST_PSEUDO_REGISTER 20
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enum reg_class
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{
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NO_REGS,
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GENERAL_REGS,
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SPECIAL_REGS,
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CC_REGS,
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ALL_REGS,
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LIM_REG_CLASSES
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};
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/* The following macro defines cover classes for Integrated Register
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Allocator. Cover classes is a set of non-intersected register
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classes covering all hard registers used for register allocation
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purpose. Any move between two registers of a cover class should be
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cheaper than load or store of the registers. The macro value is
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array of register classes with LIM_REG_CLASSES used as the end
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marker. */
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#define IRA_COVER_CLASSES { GENERAL_REGS, LIM_REG_CLASSES }
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#define REG_CLASS_CONTENTS \
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{ { 0x00000000 }, /* Empty */ \
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{ 0x0003FFFF }, /* $fp, $sp, $r0 to $r13, ?fp */ \
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{ 0x00040000 }, /* $pc */ \
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{ 0x00080000 }, /* ?cc */ \
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{ 0x000FFFFF } /* All registers */ \
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}
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#define N_REG_CLASSES LIM_REG_CLASSES
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#define REG_CLASS_NAMES {\
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"NO_REGS", \
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"GENERAL_REGS", \
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"SPECIAL_REGS", \
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"CC_REGS", \
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"ALL_REGS" }
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#define FIXED_REGISTERS { 1, 1, 0, 0, \
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0, 0, 0, 0, \
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0, 0, 0, 0, \
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0, 0, 0, 1, \
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1, 1, 1, 1 }
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#define CALL_USED_REGISTERS { 1, 1, 1, 1, \
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1, 1, 1, 1, \
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0, 0, 0, 0, \
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0, 0, 1, 1, \
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1, 1, 1, 1 }
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/* We can't copy to or from our CC register. */
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#define AVOID_CCMODE_COPIES 1
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/* A C expression that is nonzero if it is permissible to store a
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value of mode MODE in hard register number REGNO (or in several
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registers starting with that one). All gstore registers are
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equivalent, so we can set this to 1. */
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#define HARD_REGNO_MODE_OK(R,M) 1
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/* A C expression whose value is a register class containing hard
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register REGNO. */
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#define REGNO_REG_CLASS(R) ((R < MOXIE_PC) ? GENERAL_REGS : \
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(R == MOXIE_CC ? CC_REGS : SPECIAL_REGS))
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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 mode
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MODE. */
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#define HARD_REGNO_NREGS(REGNO, MODE) \
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((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
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/ UNITS_PER_WORD)
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/* A C expression that is nonzero if a value of mode MODE1 is
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accessible in mode MODE2 without copying. */
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#define MODES_TIEABLE_P(MODE1, MODE2) 1
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/* A C expression for the maximum number of consecutive registers of
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class CLASS needed to hold a value of mode MODE. */
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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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/* A C expression that places additional restrictions on the register
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class to use when it is necessary to copy value X into a register
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in class CLASS. */
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#define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
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/* The Overall Framework of an Assembler File */
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#undef ASM_SPEC
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#define ASM_COMMENT_START "#"
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#define ASM_APP_ON ""
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#define ASM_APP_OFF ""
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#define FILE_ASM_OP "\t.file\n"
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/* Switch to the text or data segment. */
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#define TEXT_SECTION_ASM_OP "\t.text"
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#define DATA_SECTION_ASM_OP "\t.data"
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/* Assembler Commands for Alignment */
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#define ASM_OUTPUT_ALIGN(STREAM,POWER) \
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fprintf (STREAM, "\t.p2align\t%d\n", POWER);
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/* A C compound statement to output to stdio stream STREAM the
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assembler syntax for an instruction operand X. */
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#define PRINT_OPERAND(STREAM, X, CODE) moxie_print_operand (STREAM, X, CODE)
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#define PRINT_OPERAND_ADDRESS(STREAM ,X) moxie_print_operand_address (STREAM, X)
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/* Output and Generation of Labels */
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#define GLOBAL_ASM_OP "\t.global\t"
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/* Passing Arguments in Registers */
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/* A C expression that controls whether a function argument is passed
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in a register, and which register. */
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#define FUNCTION_ARG(CUM,MODE,TYPE,NAMED) \
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moxie_function_arg(CUM,MODE,TYPE,NAMED)
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/* A C type for declaring a variable that is used as the first
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argument of `FUNCTION_ARG' and other related values. */
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#define CUMULATIVE_ARGS unsigned int
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/* If defined, the maximum amount of space required for outgoing arguments
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will be computed and placed into the variable
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`current_function_outgoing_args_size'. No space will be pushed
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onto the stack for each call; instead, the function prologue should
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increase the stack frame size by this amount. */
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#define ACCUMULATE_OUTGOING_ARGS 1
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/* A C statement (sans semicolon) for initializing the variable CUM
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for the state at the beginning of the argument list.
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For moxie, the first arg is passed in register 2 (aka $r0). */
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#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \
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(CUM = MOXIE_R0)
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#define MOXIE_FUNCTION_ARG_SIZE(MODE, TYPE) \
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((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
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: (unsigned) int_size_in_bytes (TYPE))
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#define FUNCTION_ARG_ADVANCE(CUM,MODE,TYPE,NAMED) \
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(CUM = (CUM < MOXIE_R6 ? \
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CUM + ((3 + MOXIE_FUNCTION_ARG_SIZE(MODE,TYPE))/4) : CUM ))
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/* How Scalar Function Values Are Returned */
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/* These macros are deprecated, but we still need them for now since
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the version of gcc we're using doesn't fully support
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TARGET_FUNCTION_VALUE. */
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#define FUNCTION_VALUE(VALTYPE, FUNC) \
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moxie_function_value (VALTYPE, FUNC, 0)
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#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
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moxie_function_value (VALTYPE, FUNC, 1)
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/* A C expression to create an RTX representing the place where a
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library function returns a value of mode MODE. */
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#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 2)
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/* STACK AND CALLING */
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/* Define this macro if pushing a word onto the stack moves the stack
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pointer to a smaller address. */
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#define STACK_GROWS_DOWNWARD
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#define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0
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/* Offset from the frame pointer to the first local variable slot to
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be allocated. */
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#define STARTING_FRAME_OFFSET 0
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/* Define this if the above stack space is to be considered part of the
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space allocated by the caller. */
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#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
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#define STACK_PARMS_IN_REG_PARM_AREA
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/* Define this if it is the responsibility of the caller to allocate
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the area reserved for arguments passed in registers. */
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#define REG_PARM_STACK_SPACE(FNDECL) (6 * UNITS_PER_WORD)
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/* Offset from the argument pointer register to the first argument's
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address. On some machines it may depend on the data type of the
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function. */
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#define FIRST_PARM_OFFSET(F) 12
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/* Define this macro to nonzero value if the addresses of local variable slots
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are at negative offsets from the frame pointer. */
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#define FRAME_GROWS_DOWNWARD 1
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/* Define this macro as a C expression that is nonzero for registers that are
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used by the epilogue or the return pattern. The stack and frame
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pointer registers are already assumed to be used as needed. */
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#define EPILOGUE_USES(R) (R == MOXIE_R5)
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#define OVERRIDE_OPTIONS moxie_override_options ()
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/* Storage Layout */
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#define BITS_BIG_ENDIAN 0
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#define BYTES_BIG_ENDIAN 1
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#define WORDS_BIG_ENDIAN 1
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/* Alignment required for a function entry point, in bits. */
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#define FUNCTION_BOUNDARY 16
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/* Define this macro as a C expression which is nonzero if accessing
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less than a word of memory (i.e. a `char' or a `short') is no
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faster than accessing a word of memory. */
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#define SLOW_BYTE_ACCESS 1
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/* Number of storage units in a word; normally the size of a
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general-purpose register, a power of two from 1 or 8. */
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#define UNITS_PER_WORD 4
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/* Define this macro to the minimum alignment enforced by hardware
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for the stack pointer on this machine. The definition is a C
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expression for the desired alignment (measured in bits). */
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#define STACK_BOUNDARY 32
|
342 |
|
|
|
343 |
|
|
/* Normal alignment required for function parameters on the stack, in
|
344 |
|
|
bits. All stack parameters receive at least this much alignment
|
345 |
|
|
regardless of data type. */
|
346 |
|
|
#define PARM_BOUNDARY 32
|
347 |
|
|
|
348 |
|
|
/* Alignment of field after `int : 0' in a structure. */
|
349 |
|
|
#define EMPTY_FIELD_BOUNDARY 32
|
350 |
|
|
|
351 |
|
|
/* No data type wants to be aligned rounder than this. */
|
352 |
|
|
#define BIGGEST_ALIGNMENT 32
|
353 |
|
|
|
354 |
|
|
/* The best alignment to use in cases where we have a choice. */
|
355 |
|
|
#define FASTEST_ALIGNMENT 32
|
356 |
|
|
|
357 |
|
|
/* Every structures size must be a multiple of 8 bits. */
|
358 |
|
|
#define STRUCTURE_SIZE_BOUNDARY 8
|
359 |
|
|
|
360 |
|
|
/* Look at the fundamental type that is used for a bit-field and use
|
361 |
|
|
that to impose alignment on the enclosing structure.
|
362 |
|
|
struct s {int a:8}; should have same alignment as "int", not "char". */
|
363 |
|
|
#define PCC_BITFIELD_TYPE_MATTERS 1
|
364 |
|
|
|
365 |
|
|
/* Largest integer machine mode for structures. If undefined, the default
|
366 |
|
|
is GET_MODE_SIZE(DImode). */
|
367 |
|
|
#define MAX_FIXED_MODE_SIZE 32
|
368 |
|
|
|
369 |
|
|
/* Make strings word-aligned so strcpy from constants will be faster. */
|
370 |
|
|
#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
|
371 |
|
|
((TREE_CODE (EXP) == STRING_CST \
|
372 |
|
|
&& (ALIGN) < FASTEST_ALIGNMENT) \
|
373 |
|
|
? FASTEST_ALIGNMENT : (ALIGN))
|
374 |
|
|
|
375 |
|
|
/* Make arrays of chars word-aligned for the same reasons. */
|
376 |
|
|
#define DATA_ALIGNMENT(TYPE, ALIGN) \
|
377 |
|
|
(TREE_CODE (TYPE) == ARRAY_TYPE \
|
378 |
|
|
&& TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
|
379 |
|
|
&& (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
|
380 |
|
|
|
381 |
|
|
/* Set this nonzero if move instructions will actually fail to work
|
382 |
|
|
when given unaligned data. */
|
383 |
|
|
#define STRICT_ALIGNMENT 1
|
384 |
|
|
|
385 |
|
|
/* Generating Code for Profiling */
|
386 |
|
|
#define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0)
|
387 |
|
|
|
388 |
|
|
/* Trampolines for Nested Functions. */
|
389 |
|
|
#define TRAMPOLINE_SIZE (2 + 6 + 6 + 2 + 2 + 6)
|
390 |
|
|
|
391 |
|
|
/* Alignment required for trampolines, in bits. */
|
392 |
|
|
#define TRAMPOLINE_ALIGNMENT 32
|
393 |
|
|
|
394 |
|
|
/* An alias for the machine mode for pointers. */
|
395 |
|
|
#define Pmode SImode
|
396 |
|
|
|
397 |
|
|
/* An alias for the machine mode used for memory references to
|
398 |
|
|
functions being called, in `call' RTL expressions. */
|
399 |
|
|
#define FUNCTION_MODE QImode
|
400 |
|
|
|
401 |
|
|
/* The register number of the stack pointer register, which must also
|
402 |
|
|
be a fixed register according to `FIXED_REGISTERS'. */
|
403 |
|
|
#define STACK_POINTER_REGNUM MOXIE_SP
|
404 |
|
|
|
405 |
|
|
/* The register number of the frame pointer register, which is used to
|
406 |
|
|
access automatic variables in the stack frame. */
|
407 |
|
|
#define FRAME_POINTER_REGNUM MOXIE_QFP
|
408 |
|
|
|
409 |
|
|
/* The register number of the arg pointer register, which is used to
|
410 |
|
|
access the function's argument list. */
|
411 |
|
|
#define ARG_POINTER_REGNUM MOXIE_QAP
|
412 |
|
|
|
413 |
|
|
#define HARD_FRAME_POINTER_REGNUM MOXIE_FP
|
414 |
|
|
|
415 |
|
|
#define ELIMINABLE_REGS \
|
416 |
|
|
{{ FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
|
417 |
|
|
{ ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }}
|
418 |
|
|
|
419 |
|
|
/* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
|
420 |
|
|
specifies the initial difference between the specified pair of
|
421 |
|
|
registers. This macro must be defined if `ELIMINABLE_REGS' is
|
422 |
|
|
defined. */
|
423 |
|
|
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
|
424 |
|
|
do { \
|
425 |
|
|
(OFFSET) = moxie_initial_elimination_offset ((FROM), (TO)); \
|
426 |
|
|
} while (0)
|
427 |
|
|
|
428 |
|
|
/* A C expression that is nonzero if REGNO is the number of a hard
|
429 |
|
|
register in which function arguments are sometimes passed. */
|
430 |
|
|
#define FUNCTION_ARG_REGNO_P(r) (r >= MOXIE_R0 && r <= MOXIE_R5)
|
431 |
|
|
|
432 |
|
|
/* A C expression that is nonzero if REGNO is the number of a hard
|
433 |
|
|
register in which the values of called function may come back. */
|
434 |
|
|
#define FUNCTION_VALUE_REGNO_P(r) (r == MOXIE_R0)
|
435 |
|
|
|
436 |
|
|
/* A macro whose definition is the name of the class to which a valid
|
437 |
|
|
base register must belong. A base register is one used in an
|
438 |
|
|
address which is the register value plus a displacement. */
|
439 |
|
|
#define BASE_REG_CLASS GENERAL_REGS
|
440 |
|
|
|
441 |
|
|
#define INDEX_REG_CLASS NO_REGS
|
442 |
|
|
|
443 |
|
|
#define HARD_REGNO_OK_FOR_BASE_P(NUM) \
|
444 |
|
|
((NUM) >= 0 && (NUM) < FIRST_PSEUDO_REGISTER \
|
445 |
|
|
&& (REGNO_REG_CLASS(NUM) == GENERAL_REGS \
|
446 |
|
|
|| (NUM) == HARD_FRAME_POINTER_REGNUM))
|
447 |
|
|
|
448 |
|
|
/* A C expression which is nonzero if register number NUM is suitable
|
449 |
|
|
for use as a base register in operand addresses. */
|
450 |
|
|
#ifdef REG_OK_STRICT
|
451 |
|
|
#define REGNO_OK_FOR_BASE_P(NUM) \
|
452 |
|
|
(HARD_REGNO_OK_FOR_BASE_P(NUM) \
|
453 |
|
|
|| HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)]))
|
454 |
|
|
#else
|
455 |
|
|
#define REGNO_OK_FOR_BASE_P(NUM) \
|
456 |
|
|
((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM))
|
457 |
|
|
#endif
|
458 |
|
|
|
459 |
|
|
/* A C expression which is nonzero if register number NUM is suitable
|
460 |
|
|
for use as an index register in operand addresses. */
|
461 |
|
|
#define REGNO_OK_FOR_INDEX_P(NUM) MOXIE_FP
|
462 |
|
|
|
463 |
|
|
/* The maximum number of bytes that a single instruction can move
|
464 |
|
|
quickly between memory and registers or between two memory
|
465 |
|
|
locations. */
|
466 |
|
|
#define MOVE_MAX 4
|
467 |
|
|
#define TRULY_NOOP_TRUNCATION(op,ip) 1
|
468 |
|
|
|
469 |
|
|
/* All load operations zero extend. */
|
470 |
|
|
#define LOAD_EXTEND_OP(MEM) ZERO_EXTEND
|
471 |
|
|
|
472 |
|
|
#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
|
473 |
|
|
|
474 |
|
|
/* A C expression that is nonzero if X is a legitimate constant for
|
475 |
|
|
an immediate operand on the target machine. */
|
476 |
|
|
#define LEGITIMATE_CONSTANT_P(X) 1
|
477 |
|
|
|
478 |
|
|
/* A number, the maximum number of registers that can appear in a
|
479 |
|
|
valid memory address. */
|
480 |
|
|
#define MAX_REGS_PER_ADDRESS 1
|
481 |
|
|
|
482 |
|
|
#define TRULY_NOOP_TRUNCATION(op,ip) 1
|
483 |
|
|
|
484 |
|
|
/* An alias for a machine mode name. This is the machine mode that
|
485 |
|
|
elements of a jump-table should have. */
|
486 |
|
|
#define CASE_VECTOR_MODE SImode
|
487 |
|
|
|
488 |
|
|
/* A C compound statement with a conditional `goto LABEL;' executed
|
489 |
|
|
if X (an RTX) is a legitimate memory address on the target machine
|
490 |
|
|
for a memory operand of mode MODE. */
|
491 |
|
|
#define GO_IF_LEGITIMATE_ADDRESS(MODE,X,LABEL) \
|
492 |
|
|
do { \
|
493 |
|
|
if (GET_CODE(X) == PLUS) \
|
494 |
|
|
{ \
|
495 |
|
|
rtx op1,op2; \
|
496 |
|
|
op1 = XEXP(X,0); \
|
497 |
|
|
op2 = XEXP(X,1); \
|
498 |
|
|
if (GET_CODE(op1) == REG \
|
499 |
|
|
&& CONSTANT_ADDRESS_P(op2) \
|
500 |
|
|
&& REGNO_OK_FOR_BASE_P(REGNO(op1))) \
|
501 |
|
|
goto LABEL; \
|
502 |
|
|
} \
|
503 |
|
|
if (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X))) \
|
504 |
|
|
goto LABEL; \
|
505 |
|
|
if (GET_CODE (X) == SYMBOL_REF \
|
506 |
|
|
|| GET_CODE (X) == LABEL_REF \
|
507 |
|
|
|| GET_CODE (X) == CONST) \
|
508 |
|
|
goto LABEL; \
|
509 |
|
|
} while (0)
|
510 |
|
|
|
511 |
|
|
/* Run-time Target Specification */
|
512 |
|
|
|
513 |
|
|
#define TARGET_CPU_CPP_BUILTINS() \
|
514 |
|
|
{ \
|
515 |
|
|
builtin_define_std ("moxie"); \
|
516 |
|
|
builtin_define_std ("MOXIE"); \
|
517 |
|
|
}
|
518 |
|
|
|
519 |
|
|
#define HAS_LONG_UNCOND_BRANCH true
|
520 |
|
|
|
521 |
|
|
#endif /* GCC_MOXIE_H */
|