489 lines
16 KiB
C
489 lines
16 KiB
C
/* Target Definitions for ft32.
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Copyright (C) 2015-2021 Free Software Foundation, Inc.
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Contributed by FTDI <support@ftdi.com>
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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_FT32_H
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#define GCC_FT32_H
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC "crt0%O%s %{msim:crti.o%s} %{!msim:crti-hw.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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%{mcompress:--relax} \
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%{msim:-Tsim.ld}"
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#undef LINK_SPEC
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#define LINK_SPEC "%{h*} %{v:-V} \
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%{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}"
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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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#undef SIZE_TYPE
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#define SIZE_TYPE "unsigned int"
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "long int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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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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"$r14", "$r15", "$r16", "$r17", "$r18", "$r19", "$r20", "$r21", "$r22", "$r23", "$r24", "$r25", "$r26", "$r27", "$r28", "$cc", \
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"?fp", "?ap", "$pc", "?cc" }
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#define FT32_FP 0
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#define FT32_SP 1
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#define FT32_R0 2
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#define FT32_R1 3
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#define FT32_R2 4
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#define FT32_R3 5
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#define FT32_R4 6
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#define FT32_R5 7
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#define FT32_R6 8
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#define FT32_R7 9
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#define FT32_R8 10
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#define FT32_R9 11
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#define FT32_R10 12
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#define FT32_R11 13
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#define FT32_R12 14
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#define FT32_R13 15
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#define FT32_R14 16
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#define FT32_R15 17
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#define FT32_R16 18
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#define FT32_R17 19
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#define FT32_R18 20
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#define FT32_R19 21
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#define FT32_R20 22
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#define FT32_R21 23
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#define FT32_R22 24
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#define FT32_R23 25
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#define FT32_R24 26
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#define FT32_R25 27
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#define FT32_R26 28
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#define FT32_R27 29
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#define FT32_R28 30
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#define FT32_R29 31
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#define FT32_QAP (32 + 1)
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#define FT32_PC (32 + 2)
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#define FT32_CC (32 + 3)
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#define FIRST_PSEUDO_REGISTER (32 + 4)
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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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#define REG_CLASS_CONTENTS \
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{ { 0x00000000, 0x00000000 }, /* Empty */ \
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{ 0xFFFFFFFF, 0x00000003 }, /* $fp, $sp, $r0 to $r13, ?fp */ \
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{ 0x00000000, 0x00000004 }, /* $pc */ \
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{ 0x00000000, 0x00000008 }, /* ?cc */ \
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{ 0xFFFFFFFF, 0x0000000F } /* 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 /* fp sp r0 r1 */ { 1, 1, 0, 0, \
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/* r2 r3 r4 r5 */ 0, 0, 0, 0, \
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/* r6 r7 r8 r9 */ 0, 0, 0, 0, \
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/* r10 r11 r12 r13 */ 0, 0, 0, 0, \
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/* r14 r15 r16 r17 */ 0, 0, 0, 0, \
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/* r18 r19 r20 r21 */ 0, 0, 0, 0, \
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/* r22 r23 r24 r25 */ 0, 0, 0, 0, \
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/* r26 r27 r28 r29 */ 0, 0, 1, 1, \
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/* r30 r31 */ 1, 1, 1, 1 }
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#define CALL_USED_REGISTERS \
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/* fp sp r0 r1 */ { 1, 1, 1, 1, \
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/* r2 r3 r4 r5 */ 1, 1, 1, 1, \
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/* r6 r7 r8 r9 */ 1, 1, 1, 1, \
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/* r10 r11 r12 r13 */ 1, 1, 1, 0, \
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/* r14 r15 r16 r17 */ 0, 0, 0, 0, \
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/* r18 r19 r20 r21 */ 0, 0, 0, 0, \
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/* r22 r23 r24 r25 */ 0, 0, 0, 0, \
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/* r26 r27 r28 r29 */ 0, 0, 1, 1, \
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/* r30 r31 */ 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 whose value is a register class containing hard
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register REGNO. */
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#define REGNO_REG_CLASS(R) ((R < FT32_PC) ? GENERAL_REGS : \
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(R == FT32_CC ? CC_REGS : SPECIAL_REGS))
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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) ft32_print_operand (STREAM, X, CODE)
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#define PRINT_OPERAND_ADDRESS(STREAM ,X) ft32_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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#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_NOPM ? 0 : 1)
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/* This is how to output an element of a case-vector that is absolute. */
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#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
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fprintf (FILE, "\t.long\t.L%d\n", VALUE) \
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/* Passing Arguments in Registers */
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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 ft32, 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 = FT32_R0)
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/* How Scalar Function Values Are Returned */
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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 1
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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) 0
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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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/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
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the stack pointer does not matter. The value is tested only in
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functions that have frame pointers.
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No definition is equivalent to always zero. */
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#define EXIT_IGNORE_STACK 0
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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 == FT32_R5)
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/* A C expression whose value is RTL representing the location of the
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incoming return address at the beginning of any function, before
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the prologue. */
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#define INCOMING_RETURN_ADDR_RTX \
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gen_frame_mem (Pmode, \
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plus_constant (Pmode, stack_pointer_rtx, 333 * UNITS_PER_WORD))
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#define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
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((COUNT) == 0 \
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? gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (-4))) \
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: NULL_RTX)
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/* Describe how we implement __builtin_eh_return. */
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#define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N+2) : INVALID_REGNUM)
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/* Store the return handler into the call frame. */
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#define EH_RETURN_HANDLER_RTX \
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gen_frame_mem (Pmode, \
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plus_constant (Pmode, frame_pointer_rtx, UNITS_PER_WORD))
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/* 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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/* Alignment required for a function entry point, in bits. */
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#define FUNCTION_BOUNDARY 32
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#define BRANCH_COST(speed_p, predictable_p) 2
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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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#define STORE_FLAG_VALUE 1
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#define MOVE_RATIO(speed) ((speed) ? 6 : 2)
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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
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/* Normal alignment required for function parameters on the stack, in
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bits. All stack parameters receive at least this much alignment
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regardless of data type. */
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#define PARM_BOUNDARY 32
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/* Alignment of field after `int : 0' in a structure. */
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#define EMPTY_FIELD_BOUNDARY 32
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/* No data type wants to be aligned rounder than this. */
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#define BIGGEST_ALIGNMENT 32
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/* The best alignment to use in cases where we have a choice. */
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#define FASTEST_ALIGNMENT 32
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/* Align definitions of arrays, unions and structures so that
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initializations and copies can be made more efficient. This is not
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ABI-changing, so it only affects places where we can see the
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definition. Increasing the alignment tends to introduce padding,
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so don't do this when optimizing for size/conserving stack space. */
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#define FT32_EXPAND_ALIGNMENT(COND, EXP, ALIGN) \
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(((COND) && ((ALIGN) < BITS_PER_WORD) \
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&& (TREE_CODE (EXP) == ARRAY_TYPE \
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|| TREE_CODE (EXP) == UNION_TYPE \
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|| TREE_CODE (EXP) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
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/* Make arrays of chars word-aligned for the same reasons. */
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#define DATA_ALIGNMENT(TYPE, ALIGN) \
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(TREE_CODE (TYPE) == ARRAY_TYPE \
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&& TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
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&& (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
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/* Similarly, make sure that objects on the stack are sensibly aligned. */
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#define LOCAL_ALIGNMENT(EXP, ALIGN) \
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FT32_EXPAND_ALIGNMENT(/*!flag_conserve_stack*/ 1, EXP, ALIGN)
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/* Every structures size must be a multiple of 8 bits. */
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#define STRUCTURE_SIZE_BOUNDARY 8
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/* Look at the fundamental type that is used for a bit-field and use
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that to impose alignment on the enclosing structure.
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struct s {int a:8}; should have same alignment as "int", not "char". */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* Largest integer machine mode for structures. If undefined, the default
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is GET_MODE_SIZE(DImode). */
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#define MAX_FIXED_MODE_SIZE 32
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/* Set this nonzero if move instructions will actually fail to work
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when given unaligned data. */
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#define STRICT_ALIGNMENT 1
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/* Generating Code for Profiling */
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#define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0)
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/* Trampolines for Nested Functions. */
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#define TRAMPOLINE_SIZE (2 + 6 + 6 + 2 + 2 + 6)
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/* Alignment required for trampolines, in bits. */
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#define TRAMPOLINE_ALIGNMENT 32
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/* An alias for the machine mode for pointers. */
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#define Pmode SImode
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#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
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do { \
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if (((MODE) == HImode) \
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|| ((MODE) == QImode)) \
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(MODE) = SImode; \
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} while (0)
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/* An alias for the machine mode used for memory references to
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functions being called, in `call' RTL expressions. */
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#define FUNCTION_MODE QImode
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#define STATIC_CHAIN_REGNUM FT32_R28
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/* The register number of the stack pointer register, which must also
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be a fixed register according to `FIXED_REGISTERS'. */
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#define STACK_POINTER_REGNUM FT32_SP
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/* The register number of the frame pointer register, which is used to
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access automatic variables in the stack frame. */
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#define FRAME_POINTER_REGNUM FT32_FP
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/* The register number of the arg pointer register, which is used to
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access the function's argument list. */
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#define ARG_POINTER_REGNUM FT32_QAP
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#define ELIMINABLE_REGS \
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{{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
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{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
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{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
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/* This macro returns the initial difference between the specified pair
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of registers. */
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#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
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do { \
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(OFFSET) = ft32_initial_elimination_offset ((FROM), (TO)); \
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} while (0)
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/* A C expression that is nonzero if REGNO is the number of a hard
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register in which function arguments are sometimes passed. */
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#define FUNCTION_ARG_REGNO_P(r) (r >= FT32_R0 && r <= FT32_R5)
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/* A macro whose definition is the name of the class to which a valid
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base register must belong. A base register is one used in an
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address which is the register value plus a displacement. */
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#define BASE_REG_CLASS GENERAL_REGS
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#define INDEX_REG_CLASS NO_REGS
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#define HARD_REGNO_OK_FOR_BASE_P(NUM) \
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((unsigned) (NUM) < FIRST_PSEUDO_REGISTER \
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&& (REGNO_REG_CLASS(NUM) == GENERAL_REGS \
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|| (NUM) == HARD_FRAME_POINTER_REGNUM))
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/* A C expression which is nonzero if register number NUM is suitable
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for use as a base register in operand addresses. */
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#ifdef REG_OK_STRICT
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#define REGNO_OK_FOR_BASE_P(NUM) \
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(HARD_REGNO_OK_FOR_BASE_P(NUM) \
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|| HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)]))
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#else
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#define REGNO_OK_FOR_BASE_P(NUM) \
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((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM))
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#endif
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/* A C expression which is nonzero if register number NUM is suitable
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for use as an index register in operand addresses. */
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#define REGNO_OK_FOR_INDEX_P(NUM) FT32_FP
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/* The maximum number of bytes that a single instruction can move
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quickly between memory and registers or between two memory
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locations. */
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#define MOVE_MAX 4
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/* Define this to be nonzero if shift instructions ignore all but the low-order
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few bits. */
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#define SHIFT_COUNT_TRUNCATED 1
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/* All load operations zero extend. */
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#define LOAD_EXTEND_OP(MEM) ZERO_EXTEND
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/* A number, the maximum number of registers that can appear in a
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valid memory address. */
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#define MAX_REGS_PER_ADDRESS 1
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/* An alias for a machine mode name. This is the machine mode that
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elements of a jump-table should have. */
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#define CASE_VECTOR_MODE SImode
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/* Run-time Target Specification */
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#define TARGET_CPU_CPP_BUILTINS() \
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{ \
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builtin_define ("__FT32__"); \
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}
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#define HAS_LONG_UNCOND_BRANCH true
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#define NO_FUNCTION_CSE 1
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#define ADDR_SPACE_PM 1
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#define REGISTER_TARGET_PRAGMAS() do { \
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c_register_addr_space ("__flash__", TARGET_NOPM ? 0 : ADDR_SPACE_PM); \
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} while (0)
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extern int ft32_is_mem_pm(rtx o);
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#define ASM_OUTPUT_SYMBOL_REF(stream, sym) \
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do { \
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assemble_name (stream, XSTR (sym, 0)); \
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int section_debug = in_section && \
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(SECTION_STYLE (in_section) == SECTION_NAMED) && \
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(in_section->named.common.flags & SECTION_DEBUG); \
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if (!section_debug && SYMBOL_REF_FLAGS (sym) & 0x1000) \
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asm_fprintf (stream, "-0x800000"); \
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} while (0)
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#endif /* GCC_FT32_H */
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