909 lines
32 KiB
C++
909 lines
32 KiB
C++
/* Definition of RISC-V target for GNU compiler.
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Copyright (C) 2011-2017 Free Software Foundation, Inc.
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Contributed by Andrew Waterman (andrew@sifive.com).
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Based on MIPS target for GNU compiler.
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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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#ifndef GCC_RISCV_H
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#define GCC_RISCV_H
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#include "config/riscv/riscv-opts.h"
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/* Target CPU builtins. */
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#define TARGET_CPU_CPP_BUILTINS() riscv_cpu_cpp_builtins (pfile)
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/* Default target_flags if no switches are 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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#ifndef RISCV_TUNE_STRING_DEFAULT
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#define RISCV_TUNE_STRING_DEFAULT "rocket"
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#endif
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/* Support for a compile-time default CPU, et cetera. The rules are:
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--with-arch is ignored if -march is specified.
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--with-abi is ignored if -mabi is specified.
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--with-tune is ignored if -mtune is specified. */
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#define OPTION_DEFAULT_SPECS \
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{"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
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{"arch", "%{!march=*:-march=%(VALUE)}" }, \
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{"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
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#ifdef IN_LIBGCC2
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#undef TARGET_64BIT
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/* Make this compile time constant for libgcc2 */
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#define TARGET_64BIT (__riscv_xlen == 64)
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#endif /* IN_LIBGCC2 */
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#undef ASM_SPEC
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#define ASM_SPEC "\
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%(subtarget_asm_debugging_spec) \
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%{" FPIE_OR_FPIC_SPEC ":-fpic} \
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%{march=*} \
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%{mabi=*} \
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%(subtarget_asm_spec)"
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#define TARGET_DEFAULT_CMODEL CM_MEDLOW
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#define LOCAL_LABEL_PREFIX "."
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#define USER_LABEL_PREFIX ""
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/* Offsets recorded in opcodes are a multiple of this alignment factor.
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The default for this in 64-bit mode is 8, which causes problems with
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SFmode register saves. */
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#define DWARF_CIE_DATA_ALIGNMENT -4
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/* The mapping from gcc register number to DWARF 2 CFA column number. */
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#define DWARF_FRAME_REGNUM(REGNO) \
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(GP_REG_P (REGNO) || FP_REG_P (REGNO) ? REGNO : INVALID_REGNUM)
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/* The DWARF 2 CFA column which tracks the return address. */
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#define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM
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#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM)
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/* Describe how we implement __builtin_eh_return. */
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#define EH_RETURN_DATA_REGNO(N) \
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((N) < 4 ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
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#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_ARG_FIRST + 4)
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/* Target machine storage layout */
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#define BITS_BIG_ENDIAN 0
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#define BYTES_BIG_ENDIAN 0
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#define WORDS_BIG_ENDIAN 0
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#define MAX_BITS_PER_WORD 64
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/* Width of a word, in units (bytes). */
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#define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
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#ifndef IN_LIBGCC2
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#define MIN_UNITS_PER_WORD 4
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#endif
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/* The `Q' extension is not yet supported. */
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#define UNITS_PER_FP_REG (TARGET_DOUBLE_FLOAT ? 8 : 4)
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/* The largest type that can be passed in floating-point registers. */
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#define UNITS_PER_FP_ARG \
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(riscv_abi == ABI_ILP32 || riscv_abi == ABI_LP64 ? 0 : \
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riscv_abi == ABI_ILP32F || riscv_abi == ABI_LP64F ? 4 : 8) \
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/* Set the sizes of the core types. */
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#define SHORT_TYPE_SIZE 16
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#define INT_TYPE_SIZE 32
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#define LONG_LONG_TYPE_SIZE 64
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#define POINTER_SIZE (riscv_abi >= ABI_LP64 ? 64 : 32)
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#define LONG_TYPE_SIZE POINTER_SIZE
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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 128
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/* Allocation boundary (in *bits*) for storing arguments in argument list. */
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#define PARM_BOUNDARY BITS_PER_WORD
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/* Allocation boundary (in *bits*) for the code of a function. */
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#define FUNCTION_BOUNDARY (TARGET_RVC ? 16 : 32)
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/* There is no point aligning anything to a rounder boundary than this. */
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#define BIGGEST_ALIGNMENT 128
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/* The user-level ISA permits unaligned accesses, but they are not required
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of the privileged architecture. */
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#define STRICT_ALIGNMENT TARGET_STRICT_ALIGN
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#define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) riscv_slow_unaligned_access
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/* Define this if you wish to imitate the way many other C compilers
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handle alignment of bitfields and the structures that contain
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them.
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The behavior is that the type written for a bit-field (`int',
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`short', or other integer type) imposes an alignment for the
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entire structure, as if the structure really did contain an
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ordinary field of that type. In addition, the bit-field is placed
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within the structure so that it would fit within such a field,
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not crossing a boundary for it.
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Thus, on most machines, a bit-field whose type is written as `int'
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would not cross a four-byte boundary, and would force four-byte
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alignment for the whole structure. (The alignment used may not
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be four bytes; it is controlled by the other alignment
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parameters.)
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If the macro is defined, its definition should be a C expression;
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a nonzero value for the expression enables this behavior. */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* If defined, a C expression to compute the alignment given to a
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constant that is being placed in memory. CONSTANT is the constant
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and ALIGN is the alignment that the object would ordinarily have.
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The value of this macro is used instead of that alignment to align
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the object.
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If this macro is not defined, then ALIGN is used.
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The typical use of this macro is to increase alignment for string
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constants to be word aligned so that `strcpy' calls that copy
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constants can be done inline. */
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#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
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((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
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&& (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
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/* If defined, a C expression to compute the alignment for a static
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variable. TYPE is the data type, and ALIGN is the alignment that
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the object would ordinarily have. The value of this macro is used
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instead of that alignment to align the object.
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If this macro is not defined, then ALIGN is used.
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One use of this macro is to increase alignment of medium-size
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data to make it all fit in fewer cache lines. Another is to
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cause character arrays to be word-aligned so that `strcpy' calls
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that copy constants to character arrays can be done inline. */
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#define DATA_ALIGNMENT(TYPE, ALIGN) \
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((((ALIGN) < BITS_PER_WORD) \
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&& (TREE_CODE (TYPE) == ARRAY_TYPE \
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|| TREE_CODE (TYPE) == UNION_TYPE \
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|| TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
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/* We need this for the same reason as DATA_ALIGNMENT, namely to cause
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character arrays to be word-aligned so that `strcpy' calls that copy
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constants to character arrays can be done inline, and 'strcmp' can be
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optimised to use word loads. */
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#define LOCAL_ALIGNMENT(TYPE, ALIGN) \
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DATA_ALIGNMENT (TYPE, ALIGN)
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/* Define if operations between registers always perform the operation
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on the full register even if a narrower mode is specified. */
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#define WORD_REGISTER_OPERATIONS 1
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/* When in 64-bit mode, move insns will sign extend SImode and CCmode
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moves. All other references are zero extended. */
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#define LOAD_EXTEND_OP(MODE) \
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(TARGET_64BIT && (MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND)
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/* Define this macro if it is advisable to hold scalars in registers
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in a wider mode than that declared by the program. In such cases,
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the value is constrained to be within the bounds of the declared
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type, but kept valid in the wider mode. The signedness of the
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extension may differ from that of the type. */
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#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
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if (GET_MODE_CLASS (MODE) == MODE_INT \
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&& GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
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{ \
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if ((MODE) == SImode) \
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(UNSIGNEDP) = 0; \
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(MODE) = word_mode; \
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}
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/* Pmode is always the same as ptr_mode, but not always the same as word_mode.
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Extensions of pointers to word_mode must be signed. */
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#define POINTERS_EXTEND_UNSIGNED false
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/* When floating-point registers are wider than integer ones, moves between
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them must go through memory. */
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#define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \
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(GET_MODE_SIZE (MODE) > UNITS_PER_WORD \
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&& ((CLASS1) == FP_REGS) != ((CLASS2) == FP_REGS))
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/* Define if loading short immediate values into registers sign extends. */
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#define SHORT_IMMEDIATES_SIGN_EXTEND 1
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/* Standard register usage. */
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/* Number of hardware registers. We have:
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- 32 integer registers
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- 32 floating point registers
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- 2 fake registers:
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- ARG_POINTER_REGNUM
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- FRAME_POINTER_REGNUM */
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#define FIRST_PSEUDO_REGISTER 66
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/* x0, sp, gp, and tp are fixed. */
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#define FIXED_REGISTERS \
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{ /* General registers. */ \
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1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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/* Floating-point registers. */ \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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/* Others. */ \
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1, 1 \
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}
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/* a0-a7, t0-a6, fa0-fa7, and ft0-ft11 are volatile across calls.
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The call RTLs themselves clobber ra. */
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#define CALL_USED_REGISTERS \
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{ /* General registers. */ \
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1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
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1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
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/* Floating-point registers. */ \
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1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
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1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
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/* Others. */ \
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1, 1 \
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}
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/* Internal macros to classify an ISA register's type. */
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#define GP_REG_FIRST 0
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#define GP_REG_LAST 31
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#define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
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#define FP_REG_FIRST 32
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#define FP_REG_LAST 63
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#define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
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/* The DWARF 2 CFA column which tracks the return address from a
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signal handler context. This means that to maintain backwards
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compatibility, no hard register can be assigned this column if it
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would need to be handled by the DWARF unwinder. */
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#define DWARF_ALT_FRAME_RETURN_COLUMN 64
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#define GP_REG_P(REGNO) \
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((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
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#define FP_REG_P(REGNO) \
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((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
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#define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
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#define HARD_REGNO_NREGS(REGNO, MODE) riscv_hard_regno_nregs (REGNO, MODE)
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#define HARD_REGNO_MODE_OK(REGNO, MODE) \
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riscv_hard_regno_mode_ok_p (REGNO, MODE)
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/* Don't allow floating-point modes to be tied, since type punning of
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single-precision and double-precision is implementation defined. */
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#define MODES_TIEABLE_P(MODE1, MODE2) \
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((MODE1) == (MODE2) \
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|| !(GET_MODE_CLASS (MODE1) == MODE_FLOAT \
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&& GET_MODE_CLASS (MODE2) == MODE_FLOAT))
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/* Use s0 as the frame pointer if it is so requested. */
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#define HARD_FRAME_POINTER_REGNUM 8
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#define STACK_POINTER_REGNUM 2
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#define THREAD_POINTER_REGNUM 4
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/* These two registers don't really exist: they get eliminated to either
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the stack or hard frame pointer. */
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#define ARG_POINTER_REGNUM 64
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#define FRAME_POINTER_REGNUM 65
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/* Register in which static-chain is passed to a function. */
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#define STATIC_CHAIN_REGNUM (GP_TEMP_FIRST + 2)
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/* Registers used as temporaries in prologue/epilogue code.
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The prologue registers mustn't conflict with any
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incoming arguments, the static chain pointer, or the frame pointer.
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The epilogue temporary mustn't conflict with the return registers,
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the frame pointer, the EH stack adjustment, or the EH data registers. */
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#define RISCV_PROLOGUE_TEMP_REGNUM (GP_TEMP_FIRST + 1)
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#define RISCV_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, RISCV_PROLOGUE_TEMP_REGNUM)
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#define MCOUNT_NAME "_mcount"
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#define NO_PROFILE_COUNTERS 1
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/* Emit rtl for profiling. Output assembler code to FILE
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to call "_mcount" for profiling a function entry. */
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#define PROFILE_HOOK(LABEL) \
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{ \
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rtx fun, ra; \
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ra = get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM); \
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fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_NAME); \
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emit_library_call (fun, LCT_NORMAL, VOIDmode, 1, ra, Pmode); \
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}
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/* All the work done in PROFILE_HOOK, but still required. */
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#define FUNCTION_PROFILER(STREAM, LABELNO) do { } while (0)
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/* Define this macro if it is as good or better to call a constant
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function address than to call an address kept in a register. */
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#define NO_FUNCTION_CSE 1
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/* Define the classes of registers for register constraints in the
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machine description. Also define ranges of constants.
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One of the classes must always be named ALL_REGS and include all hard regs.
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If there is more than one class, another class must be named NO_REGS
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and contain no registers.
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The name GENERAL_REGS must be the name of a class (or an alias for
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another name such as ALL_REGS). This is the class of registers
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that is allowed by "g" or "r" in a register constraint.
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Also, registers outside this class are allocated only when
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instructions express preferences for them.
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The classes must be numbered in nondecreasing order; that is,
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a larger-numbered class must never be contained completely
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in a smaller-numbered class.
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For any two classes, it is very desirable that there be another
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class that represents their union. */
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enum reg_class
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{
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NO_REGS, /* no registers in set */
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SIBCALL_REGS, /* registers used by indirect sibcalls */
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JALR_REGS, /* registers used by indirect calls */
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GR_REGS, /* integer registers */
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FP_REGS, /* floating-point registers */
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FRAME_REGS, /* arg pointer and frame pointer */
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ALL_REGS, /* all registers */
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LIM_REG_CLASSES /* max value + 1 */
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};
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#define N_REG_CLASSES (int) LIM_REG_CLASSES
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#define GENERAL_REGS GR_REGS
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/* An initializer containing the names of the register classes as C
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string constants. These names are used in writing some of the
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debugging dumps. */
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#define REG_CLASS_NAMES \
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{ \
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"NO_REGS", \
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"SIBCALL_REGS", \
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"JALR_REGS", \
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"GR_REGS", \
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"FP_REGS", \
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"FRAME_REGS", \
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"ALL_REGS" \
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}
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/* An initializer containing the contents of the register classes,
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as integers which are bit masks. The Nth integer specifies the
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contents of class N. The way the integer MASK is interpreted is
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that register R is in the class if `MASK & (1 << R)' is 1.
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When the machine has more than 32 registers, an integer does not
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suffice. Then the integers are replaced by sub-initializers,
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braced groupings containing several integers. Each
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sub-initializer must be suitable as an initializer for the type
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`HARD_REG_SET' which is defined in `hard-reg-set.h'. */
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#define REG_CLASS_CONTENTS \
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{ \
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{ 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
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{ 0xf00000c0, 0x00000000, 0x00000000 }, /* SIBCALL_REGS */ \
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{ 0xffffffc0, 0x00000000, 0x00000000 }, /* JALR_REGS */ \
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{ 0xffffffff, 0x00000000, 0x00000000 }, /* GR_REGS */ \
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{ 0x00000000, 0xffffffff, 0x00000000 }, /* FP_REGS */ \
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{ 0x00000000, 0x00000000, 0x00000003 }, /* FRAME_REGS */ \
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{ 0xffffffff, 0xffffffff, 0x00000003 } /* ALL_REGS */ \
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}
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/* A C expression whose value is a register class containing hard
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register REGNO. In general there is more that one such class;
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choose a class which is "minimal", meaning that no smaller class
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also contains the register. */
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#define REGNO_REG_CLASS(REGNO) riscv_regno_to_class[ (REGNO) ]
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/* A macro whose definition is the name of the class to which a
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valid base register must belong. A base register is one used in
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an address which is the register value plus a displacement. */
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#define BASE_REG_CLASS GR_REGS
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/* A macro whose definition is the name of the class to which a
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valid index register must belong. An index register is one used
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in an address where its value is either multiplied by a scale
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factor or added to another register (as well as added to a
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displacement). */
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#define INDEX_REG_CLASS NO_REGS
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/* We generally want to put call-clobbered registers ahead of
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call-saved ones. (IRA expects this.) */
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#define REG_ALLOC_ORDER \
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{ \
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/* Call-clobbered GPRs. */ \
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15, 14, 13, 12, 11, 10, 16, 17, 6, 28, 29, 30, 31, 5, 7, 1, \
|
||
/* Call-saved GPRs. */ \
|
||
8, 9, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, \
|
||
/* GPRs that can never be exposed to the register allocator. */ \
|
||
0, 2, 3, 4, \
|
||
/* Call-clobbered FPRs. */ \
|
||
47, 46, 45, 44, 43, 42, 32, 33, 34, 35, 36, 37, 38, 39, 48, 49, \
|
||
60, 61, 62, 63, \
|
||
/* Call-saved FPRs. */ \
|
||
40, 41, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
|
||
/* None of the remaining classes have defined call-saved \
|
||
registers. */ \
|
||
64, 65 \
|
||
}
|
||
|
||
/* True if VALUE is a signed 12-bit number. */
|
||
|
||
#define SMALL_OPERAND(VALUE) \
|
||
((unsigned HOST_WIDE_INT) (VALUE) + IMM_REACH/2 < IMM_REACH)
|
||
|
||
/* True if VALUE can be loaded into a register using LUI. */
|
||
|
||
#define LUI_OPERAND(VALUE) \
|
||
(((VALUE) | ((1UL<<31) - IMM_REACH)) == ((1UL<<31) - IMM_REACH) \
|
||
|| ((VALUE) | ((1UL<<31) - IMM_REACH)) + IMM_REACH == 0)
|
||
|
||
#define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
|
||
reg_classes_intersect_p (FP_REGS, CLASS)
|
||
|
||
/* Stack layout; function entry, exit and calling. */
|
||
|
||
#define STACK_GROWS_DOWNWARD 1
|
||
|
||
#define FRAME_GROWS_DOWNWARD 1
|
||
|
||
#define STARTING_FRAME_OFFSET 0
|
||
|
||
#define RETURN_ADDR_RTX riscv_return_addr
|
||
|
||
#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 INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
|
||
(OFFSET) = riscv_initial_elimination_offset (FROM, TO)
|
||
|
||
/* Allocate stack space for arguments at the beginning of each function. */
|
||
#define ACCUMULATE_OUTGOING_ARGS 1
|
||
|
||
/* The argument pointer always points to the first argument. */
|
||
#define FIRST_PARM_OFFSET(FNDECL) 0
|
||
|
||
#define REG_PARM_STACK_SPACE(FNDECL) 0
|
||
|
||
/* Define this if it is the responsibility of the caller to
|
||
allocate the area reserved for arguments passed in registers.
|
||
If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
|
||
of this macro is to determine whether the space is included in
|
||
`crtl->outgoing_args_size'. */
|
||
#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
|
||
|
||
#define STACK_BOUNDARY 128
|
||
|
||
/* Symbolic macros for the registers used to return integer and floating
|
||
point values. */
|
||
|
||
#define GP_RETURN GP_ARG_FIRST
|
||
#define FP_RETURN (UNITS_PER_FP_ARG == 0 ? GP_RETURN : FP_ARG_FIRST)
|
||
|
||
#define MAX_ARGS_IN_REGISTERS 8
|
||
|
||
/* Symbolic macros for the first/last argument registers. */
|
||
|
||
#define GP_ARG_FIRST (GP_REG_FIRST + 10)
|
||
#define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
|
||
#define GP_TEMP_FIRST (GP_REG_FIRST + 5)
|
||
#define FP_ARG_FIRST (FP_REG_FIRST + 10)
|
||
#define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
|
||
|
||
#define CALLEE_SAVED_REG_NUMBER(REGNO) \
|
||
((REGNO) >= 8 && (REGNO) <= 9 ? (REGNO) - 8 : \
|
||
(REGNO) >= 18 && (REGNO) <= 27 ? (REGNO) - 16 : -1)
|
||
|
||
#define LIBCALL_VALUE(MODE) \
|
||
riscv_function_value (NULL_TREE, NULL_TREE, MODE)
|
||
|
||
#define FUNCTION_VALUE(VALTYPE, FUNC) \
|
||
riscv_function_value (VALTYPE, FUNC, VOIDmode)
|
||
|
||
#define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN)
|
||
|
||
/* 1 if N is a possible register number for function argument passing.
|
||
We have no FP argument registers when soft-float. When FP registers
|
||
are 32 bits, we can't directly reference the odd numbered ones. */
|
||
|
||
/* Accept arguments in a0-a7, and in fa0-fa7 if permitted by the ABI. */
|
||
#define FUNCTION_ARG_REGNO_P(N) \
|
||
(IN_RANGE ((N), GP_ARG_FIRST, GP_ARG_LAST) \
|
||
|| (UNITS_PER_FP_ARG && IN_RANGE ((N), FP_ARG_FIRST, FP_ARG_LAST)))
|
||
|
||
typedef struct {
|
||
/* Number of integer registers used so far, up to MAX_ARGS_IN_REGISTERS. */
|
||
unsigned int num_gprs;
|
||
|
||
/* Number of floating-point registers used so far, likewise. */
|
||
unsigned int num_fprs;
|
||
} CUMULATIVE_ARGS;
|
||
|
||
/* 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) \
|
||
memset (&(CUM), 0, sizeof (CUM))
|
||
|
||
#define EPILOGUE_USES(REGNO) ((REGNO) == RETURN_ADDR_REGNUM)
|
||
|
||
/* ABI requires 16-byte alignment, even on RV32. */
|
||
#define RISCV_STACK_ALIGN(LOC) (((LOC) + 15) & -16)
|
||
|
||
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
|
||
the stack pointer does not matter. The value is tested only in
|
||
functions that have frame pointers.
|
||
No definition is equivalent to always zero. */
|
||
|
||
#define EXIT_IGNORE_STACK 1
|
||
|
||
|
||
/* Trampolines are a block of code followed by two pointers. */
|
||
|
||
#define TRAMPOLINE_CODE_SIZE 16
|
||
#define TRAMPOLINE_SIZE \
|
||
((Pmode == SImode) \
|
||
? TRAMPOLINE_CODE_SIZE \
|
||
: (TRAMPOLINE_CODE_SIZE + POINTER_SIZE * 2))
|
||
#define TRAMPOLINE_ALIGNMENT POINTER_SIZE
|
||
|
||
/* Addressing modes, and classification of registers for them. */
|
||
|
||
#define REGNO_OK_FOR_INDEX_P(REGNO) 0
|
||
#define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
|
||
riscv_regno_mode_ok_for_base_p (REGNO, MODE, 1)
|
||
|
||
/* 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 all.
|
||
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.
|
||
Some source files that are used after register allocation
|
||
need to be strict. */
|
||
|
||
#ifndef REG_OK_STRICT
|
||
#define REG_MODE_OK_FOR_BASE_P(X, MODE) \
|
||
riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
|
||
#else
|
||
#define REG_MODE_OK_FOR_BASE_P(X, MODE) \
|
||
riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
|
||
#endif
|
||
|
||
#define REG_OK_FOR_INDEX_P(X) 0
|
||
|
||
/* Maximum number of registers that can appear in a valid memory address. */
|
||
|
||
#define MAX_REGS_PER_ADDRESS 1
|
||
|
||
#define CONSTANT_ADDRESS_P(X) \
|
||
(CONSTANT_P (X) && memory_address_p (SImode, X))
|
||
|
||
/* This handles the magic '..CURRENT_FUNCTION' symbol, which means
|
||
'the start of the function that this code is output in'. */
|
||
|
||
#define ASM_OUTPUT_LABELREF(FILE,NAME) \
|
||
if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
|
||
asm_fprintf ((FILE), "%U%s", \
|
||
XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
|
||
else \
|
||
asm_fprintf ((FILE), "%U%s", (NAME))
|
||
|
||
#define JUMP_TABLES_IN_TEXT_SECTION 0
|
||
#define CASE_VECTOR_MODE SImode
|
||
#define CASE_VECTOR_PC_RELATIVE (riscv_cmodel != CM_MEDLOW)
|
||
|
||
/* The load-address macro is used for PC-relative addressing of symbols
|
||
that bind locally. Don't use it for symbols that should be addressed
|
||
via the GOT. Also, avoid it for CM_MEDLOW, where LUI addressing
|
||
currently results in more opportunities for linker relaxation. */
|
||
#define USE_LOAD_ADDRESS_MACRO(sym) \
|
||
(!TARGET_EXPLICIT_RELOCS && \
|
||
((flag_pic \
|
||
&& ((SYMBOL_REF_P (sym) && SYMBOL_REF_LOCAL_P (sym)) \
|
||
|| ((GET_CODE (sym) == CONST) \
|
||
&& SYMBOL_REF_P (XEXP (XEXP (sym, 0),0)) \
|
||
&& SYMBOL_REF_LOCAL_P (XEXP (XEXP (sym, 0),0))))) \
|
||
|| riscv_cmodel == CM_MEDANY))
|
||
|
||
/* Define this as 1 if `char' should by default be signed; else as 0. */
|
||
#define DEFAULT_SIGNED_CHAR 0
|
||
|
||
#define MOVE_MAX UNITS_PER_WORD
|
||
#define MAX_MOVE_MAX 8
|
||
|
||
#define SLOW_BYTE_ACCESS 0
|
||
|
||
#define SHIFT_COUNT_TRUNCATED 1
|
||
|
||
#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 word_mode
|
||
|
||
/* Give call MEMs SImode since it is the "most permissive" mode
|
||
for both 32-bit and 64-bit targets. */
|
||
|
||
#define FUNCTION_MODE SImode
|
||
|
||
/* A C expression for the cost of a branch instruction. A value of 2
|
||
seems to minimize code size. */
|
||
|
||
#define BRANCH_COST(speed_p, predictable_p) \
|
||
((!(speed_p) || (predictable_p)) ? 2 : riscv_branch_cost)
|
||
|
||
#define LOGICAL_OP_NON_SHORT_CIRCUIT 0
|
||
|
||
/* Control the assembler format that we output. */
|
||
|
||
/* Output to assembler file text saying following lines
|
||
may contain character constants, extra white space, comments, etc. */
|
||
|
||
#ifndef ASM_APP_ON
|
||
#define ASM_APP_ON " #APP\n"
|
||
#endif
|
||
|
||
/* Output to assembler file text saying following lines
|
||
no longer contain unusual constructs. */
|
||
|
||
#ifndef ASM_APP_OFF
|
||
#define ASM_APP_OFF " #NO_APP\n"
|
||
#endif
|
||
|
||
#define REGISTER_NAMES \
|
||
{ "zero","ra", "sp", "gp", "tp", "t0", "t1", "t2", \
|
||
"s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", \
|
||
"a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7", \
|
||
"s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6", \
|
||
"ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", \
|
||
"fs0", "fs1", "fa0", "fa1", "fa2", "fa3", "fa4", "fa5", \
|
||
"fa6", "fa7", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", \
|
||
"fs8", "fs9", "fs10","fs11","ft8", "ft9", "ft10","ft11", \
|
||
"arg", "frame", }
|
||
|
||
#define ADDITIONAL_REGISTER_NAMES \
|
||
{ \
|
||
{ "x0", 0 + GP_REG_FIRST }, \
|
||
{ "x1", 1 + GP_REG_FIRST }, \
|
||
{ "x2", 2 + GP_REG_FIRST }, \
|
||
{ "x3", 3 + GP_REG_FIRST }, \
|
||
{ "x4", 4 + GP_REG_FIRST }, \
|
||
{ "x5", 5 + GP_REG_FIRST }, \
|
||
{ "x6", 6 + GP_REG_FIRST }, \
|
||
{ "x7", 7 + GP_REG_FIRST }, \
|
||
{ "x8", 8 + GP_REG_FIRST }, \
|
||
{ "x9", 9 + GP_REG_FIRST }, \
|
||
{ "x10", 10 + GP_REG_FIRST }, \
|
||
{ "x11", 11 + GP_REG_FIRST }, \
|
||
{ "x12", 12 + GP_REG_FIRST }, \
|
||
{ "x13", 13 + GP_REG_FIRST }, \
|
||
{ "x14", 14 + GP_REG_FIRST }, \
|
||
{ "x15", 15 + GP_REG_FIRST }, \
|
||
{ "x16", 16 + GP_REG_FIRST }, \
|
||
{ "x17", 17 + GP_REG_FIRST }, \
|
||
{ "x18", 18 + GP_REG_FIRST }, \
|
||
{ "x19", 19 + GP_REG_FIRST }, \
|
||
{ "x20", 20 + GP_REG_FIRST }, \
|
||
{ "x21", 21 + GP_REG_FIRST }, \
|
||
{ "x22", 22 + GP_REG_FIRST }, \
|
||
{ "x23", 23 + GP_REG_FIRST }, \
|
||
{ "x24", 24 + GP_REG_FIRST }, \
|
||
{ "x25", 25 + GP_REG_FIRST }, \
|
||
{ "x26", 26 + GP_REG_FIRST }, \
|
||
{ "x27", 27 + GP_REG_FIRST }, \
|
||
{ "x28", 28 + GP_REG_FIRST }, \
|
||
{ "x29", 29 + GP_REG_FIRST }, \
|
||
{ "x30", 30 + GP_REG_FIRST }, \
|
||
{ "x31", 31 + GP_REG_FIRST }, \
|
||
{ "f0", 0 + FP_REG_FIRST }, \
|
||
{ "f1", 1 + FP_REG_FIRST }, \
|
||
{ "f2", 2 + FP_REG_FIRST }, \
|
||
{ "f3", 3 + FP_REG_FIRST }, \
|
||
{ "f4", 4 + FP_REG_FIRST }, \
|
||
{ "f5", 5 + FP_REG_FIRST }, \
|
||
{ "f6", 6 + FP_REG_FIRST }, \
|
||
{ "f7", 7 + FP_REG_FIRST }, \
|
||
{ "f8", 8 + FP_REG_FIRST }, \
|
||
{ "f9", 9 + FP_REG_FIRST }, \
|
||
{ "f10", 10 + FP_REG_FIRST }, \
|
||
{ "f11", 11 + FP_REG_FIRST }, \
|
||
{ "f12", 12 + FP_REG_FIRST }, \
|
||
{ "f13", 13 + FP_REG_FIRST }, \
|
||
{ "f14", 14 + FP_REG_FIRST }, \
|
||
{ "f15", 15 + FP_REG_FIRST }, \
|
||
{ "f16", 16 + FP_REG_FIRST }, \
|
||
{ "f17", 17 + FP_REG_FIRST }, \
|
||
{ "f18", 18 + FP_REG_FIRST }, \
|
||
{ "f19", 19 + FP_REG_FIRST }, \
|
||
{ "f20", 20 + FP_REG_FIRST }, \
|
||
{ "f21", 21 + FP_REG_FIRST }, \
|
||
{ "f22", 22 + FP_REG_FIRST }, \
|
||
{ "f23", 23 + FP_REG_FIRST }, \
|
||
{ "f24", 24 + FP_REG_FIRST }, \
|
||
{ "f25", 25 + FP_REG_FIRST }, \
|
||
{ "f26", 26 + FP_REG_FIRST }, \
|
||
{ "f27", 27 + FP_REG_FIRST }, \
|
||
{ "f28", 28 + FP_REG_FIRST }, \
|
||
{ "f29", 29 + FP_REG_FIRST }, \
|
||
{ "f30", 30 + FP_REG_FIRST }, \
|
||
{ "f31", 31 + FP_REG_FIRST }, \
|
||
}
|
||
|
||
/* Globalizing directive for a label. */
|
||
#define GLOBAL_ASM_OP "\t.globl\t"
|
||
|
||
/* This is how to store into the string LABEL
|
||
the symbol_ref name of an internal numbered label where
|
||
PREFIX is the class of label and NUM is the number within the class.
|
||
This is suitable for output with `assemble_name'. */
|
||
|
||
#undef ASM_GENERATE_INTERNAL_LABEL
|
||
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
|
||
sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
|
||
|
||
/* This is how to output an element of a case-vector that is absolute. */
|
||
|
||
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
|
||
fprintf (STREAM, "\t.word\t%sL%d\n", LOCAL_LABEL_PREFIX, VALUE)
|
||
|
||
/* This is how to output an element of a PIC case-vector. */
|
||
|
||
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
|
||
fprintf (STREAM, "\t.word\t%sL%d-%sL%d\n", \
|
||
LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL)
|
||
|
||
/* This is how to output an assembler line
|
||
that says to advance the location counter
|
||
to a multiple of 2**LOG bytes. */
|
||
|
||
#define ASM_OUTPUT_ALIGN(STREAM,LOG) \
|
||
fprintf (STREAM, "\t.align\t%d\n", (LOG))
|
||
|
||
/* Define the strings to put out for each section in the object file. */
|
||
#define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
|
||
#define DATA_SECTION_ASM_OP "\t.data" /* large data */
|
||
#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
|
||
#define BSS_SECTION_ASM_OP "\t.bss"
|
||
#define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\",@nobits"
|
||
#define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\",@progbits"
|
||
|
||
#define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
|
||
do \
|
||
{ \
|
||
fprintf (STREAM, "\taddi\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
|
||
reg_names[STACK_POINTER_REGNUM], \
|
||
reg_names[STACK_POINTER_REGNUM], \
|
||
TARGET_64BIT ? "sd" : "sw", \
|
||
reg_names[REGNO], \
|
||
reg_names[STACK_POINTER_REGNUM]); \
|
||
} \
|
||
while (0)
|
||
|
||
#define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
|
||
do \
|
||
{ \
|
||
fprintf (STREAM, "\t%s\t%s,0(%s)\n\taddi\t%s,%s,8\n", \
|
||
TARGET_64BIT ? "ld" : "lw", \
|
||
reg_names[REGNO], \
|
||
reg_names[STACK_POINTER_REGNUM], \
|
||
reg_names[STACK_POINTER_REGNUM], \
|
||
reg_names[STACK_POINTER_REGNUM]); \
|
||
} \
|
||
while (0)
|
||
|
||
#define ASM_COMMENT_START "#"
|
||
|
||
#undef SIZE_TYPE
|
||
#define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
|
||
|
||
#undef PTRDIFF_TYPE
|
||
#define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
|
||
|
||
/* If a memory-to-memory move would take MOVE_RATIO or more simple
|
||
move-instruction pairs, we will do a movmem or libcall instead. */
|
||
|
||
#define MOVE_RATIO(speed) (CLEAR_RATIO (speed) / 2)
|
||
|
||
/* For CLEAR_RATIO, when optimizing for size, give a better estimate
|
||
of the length of a memset call, but use the default otherwise. */
|
||
|
||
#define CLEAR_RATIO(speed) ((speed) ? 16 : 6)
|
||
|
||
/* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
|
||
optimizing for size adjust the ratio to account for the overhead of
|
||
loading the constant and replicating it across the word. */
|
||
|
||
#define SET_RATIO(speed) (CLEAR_RATIO (speed) - ((speed) ? 0 : 2))
|
||
|
||
#ifndef USED_FOR_TARGET
|
||
extern const enum reg_class riscv_regno_to_class[];
|
||
extern bool riscv_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
|
||
extern bool riscv_slow_unaligned_access;
|
||
#endif
|
||
|
||
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
|
||
(((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
|
||
|
||
#define XLEN_SPEC \
|
||
"%{march=rv32*:32}" \
|
||
"%{march=rv64*:64}" \
|
||
|
||
#define ABI_SPEC \
|
||
"%{mabi=ilp32:ilp32}" \
|
||
"%{mabi=ilp32f:ilp32f}" \
|
||
"%{mabi=ilp32d:ilp32d}" \
|
||
"%{mabi=lp64:lp64}" \
|
||
"%{mabi=lp64f:lp64f}" \
|
||
"%{mabi=lp64d:lp64d}" \
|
||
|
||
#define STARTFILE_PREFIX_SPEC \
|
||
"/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
|
||
"/usr/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
|
||
"/lib/ " \
|
||
"/usr/lib/ "
|
||
|
||
/* ISA constants needed for code generation. */
|
||
#define OPCODE_LW 0x2003
|
||
#define OPCODE_LD 0x3003
|
||
#define OPCODE_AUIPC 0x17
|
||
#define OPCODE_JALR 0x67
|
||
#define OPCODE_LUI 0x37
|
||
#define OPCODE_ADDI 0x13
|
||
#define SHIFT_RD 7
|
||
#define SHIFT_RS1 15
|
||
#define SHIFT_IMM 20
|
||
#define IMM_BITS 12
|
||
|
||
#define IMM_REACH (1LL << IMM_BITS)
|
||
#define CONST_HIGH_PART(VALUE) (((VALUE) + (IMM_REACH/2)) & ~(IMM_REACH-1))
|
||
#define CONST_LOW_PART(VALUE) ((VALUE) - CONST_HIGH_PART (VALUE))
|
||
|
||
#endif /* ! GCC_RISCV_H */
|