gcc/config/nios2/nios2.h

   1 /* Definitions of target machine for Altera Nios II.
   2    Copyright (C) 2012-2017 Free Software Foundation, Inc.
   3    Contributed by Jonah Graham (jgraham@altera.com),
   4    Will Reece (wreece@altera.com), and Jeff DaSilva (jdasilva@altera.com).
   5    Contributed by Mentor Graphics, Inc.
   6
   7    This file is part of GCC.
   8
   9    GCC is free software; you can redistribute it and/or modify it
  10    under the terms of the GNU General Public License as published
  11    by the Free Software Foundation; either version 3, or (at your
  12    option) any later version.
  13
  14    GCC is distributed in the hope that it will be useful, but WITHOUT
  15    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  17    License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with GCC; see the file COPYING3.  If not see
  21    <http://www.gnu.org/licenses/>.  */
  22
  23 #ifndef GCC_NIOS2_H
  24 #define GCC_NIOS2_H
  25
  26 /* Indicate R2 ISA level support.  */
  27 #define TARGET_ARCH_R2 (nios2_arch_option == ARCH_R2)
  28
  29 /* FPU insn codes declared here.  */
  30 #include "config/nios2/nios2-opts.h"
  31
  32 /* Define built-in preprocessor macros.  */
  33 #define TARGET_CPU_CPP_BUILTINS()                   \
  34   do                                                \
  35     {                                               \
  36       builtin_define_std ("NIOS2");                 \
  37       builtin_define_std ("nios2");                 \
  38       if (TARGET_BIG_ENDIAN)                        \
  39         builtin_define_std ("nios2_big_endian");    \
  40       else                                          \
  41         builtin_define_std ("nios2_little_endian"); \
  42       builtin_define_with_int_value (               \
  43         "__nios2_arch__", (int) nios2_arch_option); \
  44     }                                               \
  45   while (0)
  46
  47 /* We're little endian, unless otherwise specified by defining
  48    BIG_ENDIAN_FLAG.  */
  49 #ifndef TARGET_ENDIAN_DEFAULT
  50 # define TARGET_ENDIAN_DEFAULT 0
  51 #endif
  52
  53 /* Default target_flags if no switches specified.  */
  54 #ifndef TARGET_DEFAULT
  55 # define TARGET_DEFAULT (MASK_HAS_MUL | TARGET_ENDIAN_DEFAULT)
  56 #endif
  57
  58 #define OPTION_DEFAULT_SPECS \
  59   {"arch", "%{!march=*:%{!mcpu=*:-march=%(VALUE)}}" }
  60
  61 #define CC1_SPEC "%{G*}"
  62
  63 #if TARGET_ENDIAN_DEFAULT == 0
  64 # define ASM_SPEC "%{!meb:-EL} %{meb:-EB} %{march=*:-march=%*}"
  65 # define LINK_SPEC_ENDIAN "%{!meb:-EL} %{meb:-EB}"
  66 # define MULTILIB_DEFAULTS { "EL" }
  67 #else
  68 # define ASM_SPEC "%{!mel:-EB} %{mel:-EL} %{march=*:-march=%*}"
  69 # define LINK_SPEC_ENDIAN "%{!mel:-EB} %{mel:-EL}"
  70 # define MULTILIB_DEFAULTS { "EB" }
  71 #endif
  72
  73 #define LINK_SPEC LINK_SPEC_ENDIAN \
  74   " %{shared:-shared} \
  75     %{static:-Bstatic}"
  76
  77
  78 /* Storage layout.  */
  79
  80 #define DEFAULT_SIGNED_CHAR 1
  81 #define BITS_BIG_ENDIAN 0
  82 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
  83 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
  84 #define BITS_PER_WORD 32
  85 #define UNITS_PER_WORD 4
  86 #define POINTER_SIZE 32
  87 #define BIGGEST_ALIGNMENT 32
  88 #define STRICT_ALIGNMENT 1
  89 #define FUNCTION_BOUNDARY 32
  90 #define PARM_BOUNDARY 32
  91 #define STACK_BOUNDARY 32
  92 #define PREFERRED_STACK_BOUNDARY 32
  93 #define MAX_FIXED_MODE_SIZE 64
  94
  95 #define CONSTANT_ALIGNMENT(EXP, ALIGN)                          \
  96   ((TREE_CODE (EXP) == STRING_CST)                              \
  97    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
  98
  99 #define LABEL_ALIGN(LABEL) nios2_label_align (LABEL)
 100
 101 /* Layout of source language data types.  */
 102
 103 #define INT_TYPE_SIZE 32
 104 #define SHORT_TYPE_SIZE 16
 105 #define LONG_TYPE_SIZE 32
 106 #define LONG_LONG_TYPE_SIZE 64
 107 #define FLOAT_TYPE_SIZE 32
 108 #define DOUBLE_TYPE_SIZE 64
 109 #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
 110
 111 #undef SIZE_TYPE
 112 #define SIZE_TYPE "unsigned int"
 113
 114 #undef PTRDIFF_TYPE
 115 #define PTRDIFF_TYPE "int"
 116
 117
 118 /* Basic characteristics of Nios II registers:
 119
 120    Regno  Name
 121    0      r0       zero    always zero
 122    1      r1       at      Assembler Temporary
 123    2-3    r2-r3            Return Location
 124    4-7    r4-r7            Register Arguments
 125    8-15   r8-r15           Caller Saved Registers
 126    16-22  r16-r22          Callee Saved Registers
 127    22     r22              Global Offset Table pointer (Linux ABI only)
 128    23     r23              Thread pointer (Linux ABI only)
 129    24     r24      et      Exception Temporary
 130    25     r25      bt      Breakpoint Temporary
 131    26     r26      gp      Global Pointer
 132    27     r27      sp      Stack Pointer
 133    28     r28      fp      Frame Pointer
 134    29     r29      ea      Exception Return Address
 135    30     r30      ba      Breakpoint Return Address
 136    31     r31      ra      Return Address
 137
 138    32     ctl0     status
 139    33     ctl1     estatus STATUS saved by exception
 140    34     ctl2     bstatus STATUS saved by break
 141    35     ctl3     ipri    Interrupt Priority Mask
 142    36     ctl4     ecause  Exception Cause
 143
 144    37     pc               Not an actual register
 145
 146    38     fake_fp          Fake Frame Pointer (always eliminated)
 147    39     fake_ap          Fake Argument Pointer (always eliminated)
 148    40                      First Pseudo Register
 149
 150    In addition, r12 is used as the static chain register and r13, r14, and r15
 151    are clobbered by PLT code sequences.
 152
 153    The definitions for all the hard register numbers are located in nios2.md.
 154 */
 155
 156 #define FIXED_REGISTERS                      \
 157   {                                          \
 158 /*        +0  1  2  3  4  5  6  7  8  9 */   \
 159 /*   0 */  1, 1, 0, 0, 0, 0, 0, 0, 0, 0,     \
 160 /*  10 */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,     \
 161 /*  20 */  0, 0, TARGET_LINUX_ABI, TARGET_LINUX_ABI, 1, 1, 1, 1, 0, 1,     \
 162 /*  30 */  1, 0, 1, 1, 1, 1, 1, 1, 1, 1,     \
 163   }
 164
 165 /* Call used == caller saved + fixed regs + args + ret vals.  */
 166 #define CALL_USED_REGISTERS                  \
 167   {                                          \
 168 /*        +0  1  2  3  4  5  6  7  8  9 */   \
 169 /*   0 */  1, 1, 1, 1, 1, 1, 1, 1, 1, 1,     \
 170 /*  10 */  1, 1, 1, 1, 1, 1, 0, 0, 0, 0,     \
 171 /*  20 */  0, 0, TARGET_LINUX_ABI, TARGET_LINUX_ABI, 1, 1, 1, 1, 0, 1,     \
 172 /*  30 */  1, 1, 1, 1, 1, 1, 1, 1, 1, 1,     \
 173   }
 174
 175 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 176 #define HARD_REGNO_NREGS(REGNO, MODE)            \
 177   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 178
 179 /* Order in which to allocate registers.  Each register must be
 180    listed once.  This is the default ordering for R1 and non-CDX R2
 181    code.  For CDX, we overwrite this in ADJUST_REG_ALLOC_ORDER.  */
 182 #define REG_ALLOC_ORDER                                                 \
 183   { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, \
 184       20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, \
 185       37, 38, 39 }
 186
 187 #define ADJUST_REG_ALLOC_ORDER nios2_adjust_reg_alloc_order ()
 188
 189 /* Caller-save costs can be less emphasized under R2 CDX, where we can
 190    use push.n/pop.n.  */
 191 #define HONOR_REG_ALLOC_ORDER (TARGET_HAS_CDX)
 192
 193 /* Register Classes.  */
 194
 195 enum reg_class
 196 {
 197   NO_REGS,
 198   SIB_REGS,
 199   IJMP_REGS,
 200   GP_REGS,
 201   ALL_REGS,
 202   LIM_REG_CLASSES
 203 };
 204
 205 #define N_REG_CLASSES (int) LIM_REG_CLASSES
 206
 207 #define REG_CLASS_NAMES   \
 208   {  "NO_REGS",           \
 209      "SIB_REGS",          \
 210      "IJMP_REGS",         \
 211      "GP_REGS",           \
 212      "ALL_REGS" }
 213
 214 #define GENERAL_REGS ALL_REGS
 215
 216 #define REG_CLASS_CONTENTS                      \
 217   {                                             \
 218     /* NO_REGS    */ { 0, 0},                   \
 219     /* SIB_REGS   */ { 0xfe0c, 0},              \
 220     /* IJMP_REGS  */ { 0x7fffffff, 0},          \
 221     /* GP_REGS    */ {~0, 0},                   \
 222     /* ALL_REGS   */ {~0,~0}                    \
 223   }
 224
 225
 226 #define GP_REG_P(REGNO) ((unsigned)(REGNO) <= LAST_GP_REG)
 227 #define REGNO_REG_CLASS(REGNO) (GP_REG_P (REGNO) ? GP_REGS : ALL_REGS)
 228 #define CLASS_MAX_NREGS(CLASS, MODE)                                    \
 229   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 230
 231 #define CDX_REG_P(REGNO)                                                \
 232   ((REGNO) == 16 || (REGNO) == 17 || (2 <= (REGNO) && (REGNO) <= 7))
 233
 234 /* Tests for various kinds of constants used in the Nios II port.  */
 235
 236 #define SMALL_INT(X) ((unsigned HOST_WIDE_INT)(X) + 0x8000 < 0x10000)
 237 #define SMALL_INT12(X) ((unsigned HOST_WIDE_INT)(X) + 0x800 < 0x1000)
 238 #define SMALL_INT_UNSIGNED(X) ((X) >= 0 && (X) < 0x10000)
 239 #define UPPER16_INT(X) (((X) & 0xffff) == 0)
 240 #define SHIFT_INT(X) ((X) >= 0 && (X) <= 31)
 241 #define RDWRCTL_INT(X) ((X) >= 0 && (X) <= 31)
 242 #define CUSTOM_INSN_OPCODE(X) ((X) >= 0 && (X) <= 255)
 243 #define ANDCLEAR_INT(X) \
 244   (((X) & 0xffff) == 0xffff || (((X) >> 16) & 0xffff) == 0xffff)
 245
 246 /* Say that the epilogue uses the return address register.  Note that
 247    in the case of sibcalls, the values "used by the epilogue" are
 248    considered live at the start of the called function.  */
 249 #define EPILOGUE_USES(REGNO) (epilogue_completed && (REGNO) == RA_REGNO)
 250
 251 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
 252    the stack pointer does not matter.  The value is tested only in
 253    functions that have frame pointers.
 254    No definition is equivalent to always zero.  */
 255
 256 #define EXIT_IGNORE_STACK 1
 257
 258 /* Trampolines use a 5-instruction sequence.  */
 259 #define TRAMPOLINE_SIZE 20
 260
 261 /* Stack layout.  */
 262 #define STACK_GROWS_DOWNWARD 1
 263 #define STARTING_FRAME_OFFSET 0
 264 #define FIRST_PARM_OFFSET(FUNDECL) 0
 265
 266 /* Before the prologue, RA lives in r31.  */
 267 #define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (Pmode, RA_REGNO)
 268 #define RETURN_ADDR_RTX(C,F) nios2_get_return_address (C)
 269
 270 #define DWARF_FRAME_RETURN_COLUMN RA_REGNO
 271
 272 /* The CFA includes the pretend args.  */
 273 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
 274   (gcc_assert ((FNDECL) == current_function_decl), \
 275    FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
 276
 277 /* Frame/arg pointer elimination settings.  */
 278 #define ELIMINABLE_REGS                                                 \
 279 {{ ARG_POINTER_REGNUM,   STACK_POINTER_REGNUM},                         \
 280  { ARG_POINTER_REGNUM,   HARD_FRAME_POINTER_REGNUM},                    \
 281  { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},                         \
 282  { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}
 283
 284 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
 285   (OFFSET) = nios2_initial_elimination_offset ((FROM), (TO))
 286
 287 /* Calling convention definitions.  */
 288 typedef struct nios2_args
 289 {
 290   int regs_used;
 291 } CUMULATIVE_ARGS;
 292
 293 #define NUM_ARG_REGS (LAST_ARG_REGNO - FIRST_ARG_REGNO + 1)
 294
 295 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 296   do { (CUM).regs_used = 0; } while (0)
 297
 298 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
 299   (nios2_function_arg_padding ((MODE), (TYPE)))
 300
 301 #define PAD_VARARGS_DOWN \
 302   (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
 303
 304 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
 305   (nios2_block_reg_padding ((MODE), (TYPE), (FIRST)))
 306
 307 #define FUNCTION_ARG_REGNO_P(REGNO) \
 308   ((REGNO) >= FIRST_ARG_REGNO && (REGNO) <= LAST_ARG_REGNO)
 309
 310 /* Passing function arguments on stack.  */
 311 #define PUSH_ARGS 0
 312 #define ACCUMULATE_OUTGOING_ARGS 1
 313
 314 /* We define TARGET_RETURN_IN_MEMORY, so set to zero.  */
 315 #define DEFAULT_PCC_STRUCT_RETURN 0
 316
 317 /* Profiling.  */
 318 #define PROFILE_BEFORE_PROLOGUE
 319 #define NO_PROFILE_COUNTERS 1
 320 #define FUNCTION_PROFILER(FILE, LABELNO) \
 321   nios2_function_profiler ((FILE), (LABELNO))
 322
 323 /* Addressing modes.  */
 324
 325 #define CONSTANT_ADDRESS_P(X) \
 326   (CONSTANT_P (X) && memory_address_p (SImode, X))
 327
 328 #define MAX_REGS_PER_ADDRESS 1
 329 #define BASE_REG_CLASS ALL_REGS
 330 #define INDEX_REG_CLASS NO_REGS
 331
 332 #define REGNO_OK_FOR_BASE_P(REGNO) nios2_regno_ok_for_base_p ((REGNO), true)
 333 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
 334
 335 /* Describing Relative Costs of Operations.  */
 336 #define MOVE_MAX 4
 337 #define SLOW_BYTE_ACCESS 1
 338
 339 /* It is as good to call a constant function address as to call an address
 340    kept in a register.  */
 341 #define NO_FUNCTION_CSE 1
 342
 343 /* Position independent code.  */
 344
 345 #define PIC_OFFSET_TABLE_REGNUM 22
 346 #define LEGITIMATE_PIC_OPERAND_P(X) nios2_legitimate_pic_operand_p (X)
 347
 348 /* Define output assembler language.  */
 349
 350 #define ASM_APP_ON "#APP\n"
 351 #define ASM_APP_OFF "#NO_APP\n"
 352
 353 #define ASM_COMMENT_START "# "
 354
 355 #define GLOBAL_ASM_OP "\t.global\t"
 356
 357 #define REGISTER_NAMES \
 358   {                    \
 359     "zero", \
 360     "at", \
 361     "r2", \
 362     "r3", \
 363     "r4", \
 364     "r5", \
 365     "r6", \
 366     "r7", \
 367     "r8", \
 368     "r9", \
 369     "r10", \
 370     "r11", \
 371     "r12", \
 372     "r13", \
 373     "r14", \
 374     "r15", \
 375     "r16", \
 376     "r17", \
 377     "r18", \
 378     "r19", \
 379     "r20", \
 380     "r21", \
 381     "r22", \
 382     "r23", \
 383     "et", \
 384     "bt", \
 385     "gp", \
 386     "sp", \
 387     "fp", \
 388     "ta", \
 389     "ba", \
 390     "ra", \
 391     "status", \
 392     "estatus", \
 393     "bstatus", \
 394     "ipri", \
 395     "ecause", \
 396     "pc", \
 397     "fake_fp", \
 398     "fake_ap", \
 399 }
 400
 401 #define ADDITIONAL_REGISTER_NAMES       \
 402 {                                       \
 403   {"r0", 0},                            \
 404   {"r1", 1},                            \
 405   {"r24", 24},                          \
 406   {"r25", 25},                          \
 407   {"r26", 26},                          \
 408   {"r27", 27},                          \
 409   {"r28", 28},                          \
 410   {"r29", 29},                          \
 411   {"r30", 30},                          \
 412   {"r31", 31}                           \
 413 }
 414
 415 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
 416   do                                                                    \
 417     {                                                                   \
 418       fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \
 419       fprintf (FILE, ".L%u\n", (unsigned) (VALUE));                     \
 420     }                                                                   \
 421   while (0)
 422
 423 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)\
 424   do                                                                    \
 425     {                                                                   \
 426       fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), STREAM); \
 427       fprintf (STREAM, ".L%u-.L%u\n", (unsigned) (VALUE), (unsigned) (REL)); \
 428     }                                                                   \
 429   while (0)
 430
 431 /* Section directives.  */
 432
 433 /* Output before read-only data.  */
 434 #define TEXT_SECTION_ASM_OP "\t.section\t.text"
 435
 436 /* Output before writable data.  */
 437 #define DATA_SECTION_ASM_OP "\t.section\t.data"
 438
 439 /* Output before uninitialized data.  */
 440 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
 441
 442 /* Output before 'small' uninitialized data.  */
 443 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss"
 444
 445 #ifndef IN_LIBGCC2
 446 /* Default the definition of "small data" to 8 bytes.  */
 447 extern unsigned HOST_WIDE_INT nios2_section_threshold;
 448 #endif
 449
 450 #define NIOS2_DEFAULT_GVALUE 8
 451
 452 /* This says how to output assembler code to declare an
 453    uninitialized external linkage data object.  Under SVR4,
 454    the linker seems to want the alignment of data objects
 455    to depend on their types.  We do exactly that here.  */
 456 #undef COMMON_ASM_OP
 457 #define COMMON_ASM_OP   "\t.comm\t"
 458
 459 #define ASM_OUTPUT_ALIGN(FILE, LOG)                  \
 460   do {                                               \
 461     fprintf ((FILE), "%s%d\n", ALIGN_ASM_OP, (LOG)); \
 462   } while (0)
 463
 464 #undef  ASM_OUTPUT_ALIGNED_COMMON
 465 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 466 do                                                                      \
 467   {                                                                     \
 468     fprintf ((FILE), "%s", COMMON_ASM_OP);                              \
 469     assemble_name ((FILE), (NAME));                                     \
 470     fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE),   \
 471              (ALIGN) / BITS_PER_UNIT);                                  \
 472   }                                                                     \
 473 while (0)
 474
 475
 476 /* This says how to output assembler code to declare an
 477    uninitialized internal linkage data object.  Under SVR4,
 478    the linker seems to want the alignment of data objects
 479    to depend on their types.  We do exactly that here.  */
 480
 481 #undef  ASM_OUTPUT_ALIGNED_LOCAL
 482 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 483 do {                                                                    \
 484   if ((SIZE) <= nios2_section_threshold)                                \
 485     switch_to_section (sbss_section);                                   \
 486   else                                                                  \
 487     switch_to_section (bss_section);                                    \
 488   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 489   if (!flag_inhibit_size_directive)                                     \
 490     ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                       \
 491   ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT));       \
 492   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 493   ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1);                         \
 494 } while (0)
 495
 496 /* Put the jump tables in .text because when using position-independent code,
 497    Nios II elf has no relocation that can represent arbitrary differences
 498    between symbols in different sections.  */
 499 #define JUMP_TABLES_IN_TEXT_SECTION 1
 500
 501 /* Exception handling.  */
 502
 503 /* Describe __builtin_eh_return.  */
 504 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, LAST_RETVAL_REGNO)
 505 #define EH_RETURN_DATA_REGNO(N) ((N) <= (LAST_ARG_REGNO - FIRST_ARG_REGNO) \
 506                                  ? (N) + FIRST_ARG_REGNO : INVALID_REGNUM)
 507
 508 /* Nios II has no appropriate relocations for a 32-bit PC-relative or
 509    section-relative pointer encoding.  This therefore always chooses an
 510    absolute representation for pointers.  An unfortunate consequence of
 511    this is that ld complains about the absolute fde encoding when linking
 512    with -shared or -fpie, but the warning is harmless and there seems to
 513    be no good way to suppress it.  */
 514 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL)              \
 515   (flag_pic ? DW_EH_PE_aligned : DW_EH_PE_sdata4)
 516
 517 /* Misc. parameters.  */
 518
 519 #define STORE_FLAG_VALUE 1
 520 #define Pmode SImode
 521 #define FUNCTION_MODE QImode
 522
 523 #define CASE_VECTOR_MODE Pmode
 524
 525 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 526
 527 #define LOAD_EXTEND_OP(MODE) (ZERO_EXTEND)
 528
 529 #define WORD_REGISTER_OPERATIONS 1
 530
 531 #endif /* GCC_NIOS2_H */