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/* Target Definitions for ft32.
Copyright (C) 2015-2022 Free Software Foundation, Inc.
Contributed by FTDI <support@ftdi.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_FT32_H
#define GCC_FT32_H
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "crt0%O%s %{msim:crti.o%s} %{!msim:crti-hw.o%s} crtbegin.o%s"
/* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
magical crtend.o file (see crtstuff.c) which provides part of the
support for getting C++ file-scope static object constructed before
entering `main', followed by the normal svr3/svr4 "finalizer" file,
which is either `gcrtn.o' or `crtn.o'. */
#undef ENDFILE_SPEC
#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
/* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
standard C library (unless we are building a shared library) and
the simulator BSP code. */
#undef LIB_SPEC
#define LIB_SPEC "%{!shared:%{!symbolic:-lc}} \
%{mcompress:--relax} \
%{msim:-Tsim.ld}"
#undef LINK_SPEC
#define LINK_SPEC "%{h*} %{v:-V} \
%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}"
/* Layout of Source Language Data Types */
#define INT_TYPE_SIZE 32
#define SHORT_TYPE_SIZE 16
#define LONG_TYPE_SIZE 32
#define LONG_LONG_TYPE_SIZE 64
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 64
#define LONG_DOUBLE_TYPE_SIZE 64
#define DEFAULT_SIGNED_CHAR 1
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
#undef WCHAR_TYPE
#define WCHAR_TYPE "long int"
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
#define REGISTER_NAMES { \
"$fp", "$sp", "$r0", "$r1", \
"$r2", "$r3", "$r4", "$r5", \
"$r6", "$r7", "$r8", "$r9", \
"$r10", "$r11", "$r12", "$r13", \
"$r14", "$r15", "$r16", "$r17", "$r18", "$r19", "$r20", "$r21", "$r22", "$r23", "$r24", "$r25", "$r26", "$r27", "$r28", "$cc", \
"?fp", "?ap", "$pc", "?cc" }
#define FT32_FP 0
#define FT32_SP 1
#define FT32_R0 2
#define FT32_R1 3
#define FT32_R2 4
#define FT32_R3 5
#define FT32_R4 6
#define FT32_R5 7
#define FT32_R6 8
#define FT32_R7 9
#define FT32_R8 10
#define FT32_R9 11
#define FT32_R10 12
#define FT32_R11 13
#define FT32_R12 14
#define FT32_R13 15
#define FT32_R14 16
#define FT32_R15 17
#define FT32_R16 18
#define FT32_R17 19
#define FT32_R18 20
#define FT32_R19 21
#define FT32_R20 22
#define FT32_R21 23
#define FT32_R22 24
#define FT32_R23 25
#define FT32_R24 26
#define FT32_R25 27
#define FT32_R26 28
#define FT32_R27 29
#define FT32_R28 30
#define FT32_R29 31
#define FT32_QAP (32 + 1)
#define FT32_PC (32 + 2)
#define FT32_CC (32 + 3)
#define FIRST_PSEUDO_REGISTER (32 + 4)
enum reg_class
{
NO_REGS,
GENERAL_REGS,
SPECIAL_REGS,
CC_REGS,
ALL_REGS,
LIM_REG_CLASSES
};
#define REG_CLASS_CONTENTS \
{ { 0x00000000, 0x00000000 }, /* Empty */ \
{ 0xFFFFFFFF, 0x00000003 }, /* $fp, $sp, $r0 to $r13, ?fp */ \
{ 0x00000000, 0x00000004 }, /* $pc */ \
{ 0x00000000, 0x00000008 }, /* ?cc */ \
{ 0xFFFFFFFF, 0x0000000F } /* All registers */ \
}
#define N_REG_CLASSES LIM_REG_CLASSES
#define REG_CLASS_NAMES {\
"NO_REGS", \
"GENERAL_REGS", \
"SPECIAL_REGS", \
"CC_REGS", \
"ALL_REGS" }
#define FIXED_REGISTERS /* fp sp r0 r1 */ { 1, 1, 0, 0, \
/* r2 r3 r4 r5 */ 0, 0, 0, 0, \
/* r6 r7 r8 r9 */ 0, 0, 0, 0, \
/* r10 r11 r12 r13 */ 0, 0, 0, 0, \
/* r14 r15 r16 r17 */ 0, 0, 0, 0, \
/* r18 r19 r20 r21 */ 0, 0, 0, 0, \
/* r22 r23 r24 r25 */ 0, 0, 0, 0, \
/* r26 r27 r28 r29 */ 0, 0, 1, 1, \
/* r30 r31 */ 1, 1, 1, 1 }
#define CALL_USED_REGISTERS \
/* fp sp r0 r1 */ { 1, 1, 1, 1, \
/* r2 r3 r4 r5 */ 1, 1, 1, 1, \
/* r6 r7 r8 r9 */ 1, 1, 1, 1, \
/* r10 r11 r12 r13 */ 1, 1, 1, 0, \
/* r14 r15 r16 r17 */ 0, 0, 0, 0, \
/* r18 r19 r20 r21 */ 0, 0, 0, 0, \
/* r22 r23 r24 r25 */ 0, 0, 0, 0, \
/* r26 r27 r28 r29 */ 0, 0, 1, 1, \
/* r30 r31 */ 1, 1, 1, 1 }
/* We can't copy to or from our CC register. */
#define AVOID_CCMODE_COPIES 1
/* A C expression whose value is a register class containing hard
register REGNO. */
#define REGNO_REG_CLASS(R) ((R < FT32_PC) ? GENERAL_REGS : \
(R == FT32_CC ? CC_REGS : SPECIAL_REGS))
/* The Overall Framework of an Assembler File */
#undef ASM_SPEC
#define ASM_COMMENT_START "#"
#define ASM_APP_ON ""
#define ASM_APP_OFF ""
#define FILE_ASM_OP "\t.file\n"
/* Switch to the text or data segment. */
#define TEXT_SECTION_ASM_OP "\t.text"
#define DATA_SECTION_ASM_OP "\t.data"
/* Assembler Commands for Alignment */
#define ASM_OUTPUT_ALIGN(STREAM,POWER) \
fprintf (STREAM, "\t.p2align\t%d\n", POWER);
/* A C compound statement to output to stdio stream STREAM the
assembler syntax for an instruction operand X. */
#define PRINT_OPERAND(STREAM, X, CODE) ft32_print_operand (STREAM, X, CODE)
#define PRINT_OPERAND_ADDRESS(STREAM ,X) ft32_print_operand_address (STREAM, X)
/* Output and Generation of Labels */
#define GLOBAL_ASM_OP "\t.global\t"
#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_NOPM ? 0 : 1)
/* 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.long\t.L%d\n", VALUE) \
/* Passing Arguments in Registers */
/* A C type for declaring a variable that is used as the first
argument of `FUNCTION_ARG' and other related values. */
#define CUMULATIVE_ARGS unsigned int
/* If defined, the maximum amount of space required for outgoing arguments
will be computed and placed into the variable
`current_function_outgoing_args_size'. No space will be pushed
onto the stack for each call; instead, the function prologue should
increase the stack frame size by this amount. */
#define ACCUMULATE_OUTGOING_ARGS 1
/* A C statement (sans semicolon) for initializing the variable CUM
for the state at the beginning of the argument list.
For ft32, the first arg is passed in register 2 (aka $r0). */
#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \
(CUM = FT32_R0)
/* How Scalar Function Values Are Returned */
/* STACK AND CALLING */
/* Define this macro if pushing a word onto the stack moves the stack
pointer to a smaller address. */
#define STACK_GROWS_DOWNWARD 1
/* Offset from the argument pointer register to the first argument's
address. On some machines it may depend on the data type of the
function. */
#define FIRST_PARM_OFFSET(F) 0
/* Define this macro to nonzero value if the addresses of local variable slots
are at negative offsets from the frame pointer. */
#define FRAME_GROWS_DOWNWARD 1
/* 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
/* Define this macro as a C expression that is nonzero for registers that are
used by the epilogue or the return pattern. The stack and frame
pointer registers are already assumed to be used as needed. */
#define EPILOGUE_USES(R) (R == FT32_R5)
/* A C expression whose value is RTL representing the location of the
incoming return address at the beginning of any function, before
the prologue. */
#define INCOMING_RETURN_ADDR_RTX \
gen_frame_mem (Pmode, \
plus_constant (Pmode, stack_pointer_rtx, 333 * UNITS_PER_WORD))
#define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
((COUNT) == 0 \
? gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (-4))) \
: NULL_RTX)
/* Describe how we implement __builtin_eh_return. */
#define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N+2) : INVALID_REGNUM)
/* Store the return handler into the call frame. */
#define EH_RETURN_HANDLER_RTX \
gen_frame_mem (Pmode, \
plus_constant (Pmode, frame_pointer_rtx, UNITS_PER_WORD))
/* Storage Layout */
#define BITS_BIG_ENDIAN 0
#define BYTES_BIG_ENDIAN 0
#define WORDS_BIG_ENDIAN 0
/* Alignment required for a function entry point, in bits. */
#define FUNCTION_BOUNDARY 32
#define BRANCH_COST(speed_p, predictable_p) 2
/* Define this macro as a C expression which is nonzero if accessing
less than a word of memory (i.e. a `char' or a `short') is no
faster than accessing a word of memory. */
#define SLOW_BYTE_ACCESS 1
#define STORE_FLAG_VALUE 1
#define MOVE_RATIO(speed) ((speed) ? 6 : 2)
/* Number of storage units in a word; normally the size of a
general-purpose register, a power of two from 1 or 8. */
#define UNITS_PER_WORD 4
/* Define this macro to the minimum alignment enforced by hardware
for the stack pointer on this machine. The definition is a C
expression for the desired alignment (measured in bits). */
#define STACK_BOUNDARY 32
/* Normal alignment required for function parameters on the stack, in
bits. All stack parameters receive at least this much alignment
regardless of data type. */
#define PARM_BOUNDARY 32
/* Alignment of field after `int : 0' in a structure. */
#define EMPTY_FIELD_BOUNDARY 32
/* No data type wants to be aligned rounder than this. */
#define BIGGEST_ALIGNMENT 32
/* The best alignment to use in cases where we have a choice. */
#define FASTEST_ALIGNMENT 32
/* Align definitions of arrays, unions and structures so that
initializations and copies can be made more efficient. This is not
ABI-changing, so it only affects places where we can see the
definition. Increasing the alignment tends to introduce padding,
so don't do this when optimizing for size/conserving stack space. */
#define FT32_EXPAND_ALIGNMENT(COND, EXP, ALIGN) \
(((COND) && ((ALIGN) < BITS_PER_WORD) \
&& (TREE_CODE (EXP) == ARRAY_TYPE \
|| TREE_CODE (EXP) == UNION_TYPE \
|| TREE_CODE (EXP) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
/* Make arrays of chars word-aligned for the same reasons. */
#define DATA_ALIGNMENT(TYPE, ALIGN) \
(TREE_CODE (TYPE) == ARRAY_TYPE \
&& TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
&& (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
/* Similarly, make sure that objects on the stack are sensibly aligned. */
#define LOCAL_ALIGNMENT(EXP, ALIGN) \
FT32_EXPAND_ALIGNMENT(/*!flag_conserve_stack*/ 1, EXP, ALIGN)
/* Every structures size must be a multiple of 8 bits. */
#define STRUCTURE_SIZE_BOUNDARY 8
/* Look at the fundamental type that is used for a bit-field and use
that to impose alignment on the enclosing structure.
struct s {int a:8}; should have same alignment as "int", not "char". */
#define PCC_BITFIELD_TYPE_MATTERS 1
/* Largest integer machine mode for structures. If undefined, the default
is GET_MODE_SIZE(DImode). */
#define MAX_FIXED_MODE_SIZE 32
/* Set this nonzero if move instructions will actually fail to work
when given unaligned data. */
#define STRICT_ALIGNMENT 1
/* Generating Code for Profiling */
#define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0)
/* Trampolines for Nested Functions. */
#define TRAMPOLINE_SIZE (2 + 6 + 6 + 2 + 2 + 6)
/* Alignment required for trampolines, in bits. */
#define TRAMPOLINE_ALIGNMENT 32
/* An alias for the machine mode for pointers. */
#define Pmode SImode
#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
do { \
if (((MODE) == HImode) \
|| ((MODE) == QImode)) \
(MODE) = SImode; \
} while (0)
/* An alias for the machine mode used for memory references to
functions being called, in `call' RTL expressions. */
#define FUNCTION_MODE QImode
#define STATIC_CHAIN_REGNUM FT32_R28
/* The register number of the stack pointer register, which must also
be a fixed register according to `FIXED_REGISTERS'. */
#define STACK_POINTER_REGNUM FT32_SP
/* The register number of the frame pointer register, which is used to
access automatic variables in the stack frame. */
#define FRAME_POINTER_REGNUM FT32_FP
/* The register number of the arg pointer register, which is used to
access the function's argument list. */
#define ARG_POINTER_REGNUM FT32_QAP
#define ELIMINABLE_REGS \
{{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
/* This macro returns the initial difference between the specified pair
of registers. */
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
do { \
(OFFSET) = ft32_initial_elimination_offset ((FROM), (TO)); \
} while (0)
/* A C expression that is nonzero if REGNO is the number of a hard
register in which function arguments are sometimes passed. */
#define FUNCTION_ARG_REGNO_P(r) (r >= FT32_R0 && r <= FT32_R5)
/* A macro whose definition is the name of the class to which a valid
base register must belong. A base register is one used in an
address which is the register value plus a displacement. */
#define BASE_REG_CLASS GENERAL_REGS
#define INDEX_REG_CLASS NO_REGS
#define HARD_REGNO_OK_FOR_BASE_P(NUM) \
((unsigned) (NUM) < FIRST_PSEUDO_REGISTER \
&& (REGNO_REG_CLASS(NUM) == GENERAL_REGS \
|| (NUM) == HARD_FRAME_POINTER_REGNUM))
/* A C expression which is nonzero if register number NUM is suitable
for use as a base register in operand addresses. */
#ifdef REG_OK_STRICT
#define REGNO_OK_FOR_BASE_P(NUM) \
(HARD_REGNO_OK_FOR_BASE_P(NUM) \
|| HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)]))
#else
#define REGNO_OK_FOR_BASE_P(NUM) \
((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM))
#endif
/* A C expression which is nonzero if register number NUM is suitable
for use as an index register in operand addresses. */
#define REGNO_OK_FOR_INDEX_P(NUM) FT32_FP
/* The maximum number of bytes that a single instruction can move
quickly between memory and registers or between two memory
locations. */
#define MOVE_MAX 4
/* Define this to be nonzero if shift instructions ignore all but the low-order
few bits. */
#define SHIFT_COUNT_TRUNCATED 1
/* All load operations zero extend. */
#define LOAD_EXTEND_OP(MEM) ZERO_EXTEND
/* A number, the maximum number of registers that can appear in a
valid memory address. */
#define MAX_REGS_PER_ADDRESS 1
/* An alias for a machine mode name. This is the machine mode that
elements of a jump-table should have. */
#define CASE_VECTOR_MODE SImode
/* Run-time Target Specification */
#define TARGET_CPU_CPP_BUILTINS() \
{ \
builtin_define ("__FT32__"); \
}
#define HAS_LONG_UNCOND_BRANCH true
#define NO_FUNCTION_CSE 1
#define ADDR_SPACE_PM 1
#define REGISTER_TARGET_PRAGMAS() do { \
c_register_addr_space ("__flash__", TARGET_NOPM ? 0 : ADDR_SPACE_PM); \
} while (0)
extern int ft32_is_mem_pm(rtx o);
#define ASM_OUTPUT_SYMBOL_REF(stream, sym) \
do { \
assemble_name (stream, XSTR (sym, 0)); \
int section_debug = in_section && \
(SECTION_STYLE (in_section) == SECTION_NAMED) && \
(in_section->named.common.flags & SECTION_DEBUG); \
if (!section_debug && SYMBOL_REF_FLAGS (sym) & 0x1000) \
asm_fprintf (stream, "-0x800000"); \
} while (0)
#endif /* GCC_FT32_H */
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