1 /* Target Definitions for moxie. 2 Copyright (C) 2008-2020 Free Software Foundation, Inc. 3 Contributed by Anthony Green. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GCC_MOXIE_H 22 #define GCC_MOXIE_H 23 24 #undef STARTFILE_SPEC 25 #define STARTFILE_SPEC "%{!mno-crt0:crt0%O%s} crti.o%s crtbegin.o%s" 26 27 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own 28 magical crtend.o file (see crtstuff.c) which provides part of the 29 support for getting C++ file-scope static object constructed before 30 entering `main', followed by the normal svr3/svr4 "finalizer" file, 31 which is either `gcrtn.o' or `crtn.o'. */ 32 33 #undef ENDFILE_SPEC 34 #define ENDFILE_SPEC "crtend.o%s crtn.o%s" 35 36 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default 37 standard C library (unless we are building a shared library) and 38 the simulator BSP code. */ 39 40 #undef LIB_SPEC 41 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}" 42 43 #undef LINK_SPEC 44 #define LINK_SPEC "%{h*} %{v:-V} %{!mel:-EB} %{mel:-EL}\ 45 %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}" 46 47 #ifndef MULTILIB_DEFAULTS 48 #define MULTILIB_DEFAULTS { "meb" } 49 #endif 50 51 /* Layout of Source Language Data Types */ 52 53 #define INT_TYPE_SIZE 32 54 #define SHORT_TYPE_SIZE 16 55 #define LONG_TYPE_SIZE 32 56 #define LONG_LONG_TYPE_SIZE 64 57 58 #define FLOAT_TYPE_SIZE 32 59 #define DOUBLE_TYPE_SIZE 64 60 #define LONG_DOUBLE_TYPE_SIZE 64 61 62 #define DEFAULT_SIGNED_CHAR 0 63 64 #undef SIZE_TYPE 65 #define SIZE_TYPE "unsigned int" 66 67 #undef PTRDIFF_TYPE 68 #define PTRDIFF_TYPE "int" 69 70 #undef WCHAR_TYPE 71 #define WCHAR_TYPE "unsigned int" 72 73 #undef WCHAR_TYPE_SIZE 74 #define WCHAR_TYPE_SIZE BITS_PER_WORD 75 76 /* Registers... 77 78 $fp - frame pointer 79 $sp - stack pointer 80 $r0 - general purpose 32-bit register. 81 $r1 - general purpose 32-bit register. 82 $r2 - general purpose 32-bit register. 83 $r3 - general purpose 32-bit register. 84 $r4 - general purpose 32-bit register. 85 $r5 - general purpose 32-bit register. 86 $r6 - general purpose 32-bit register. 87 $r7 - general purpose 32-bit register. 88 $r8 - general purpose 32-bit register. 89 $r9 - general purpose 32-bit register. 90 $r10 - general purpose 32-bit register. 91 $r11 - general purpose 32-bit register. 92 $r12 - general purpose 32-bit register. 93 $r13 - reserved for execution environment. 94 95 Special Registers... 96 97 $pc - 32-bit program counter. 98 99 */ 100 101 #define REGISTER_NAMES { \ 102 "$fp", "$sp", "$r0", "$r1", \ 103 "$r2", "$r3", "$r4", "$r5", \ 104 "$r6", "$r7", "$r8", "$r9", \ 105 "$r10", "$r11", "$r12", "$r13", \ 106 "?fp", "?ap", "$pc", "?cc" } 107 108 #define MOXIE_FP 0 109 #define MOXIE_SP 1 110 #define MOXIE_R0 2 111 #define MOXIE_R1 3 112 #define MOXIE_R2 4 113 #define MOXIE_R3 5 114 #define MOXIE_R4 6 115 #define MOXIE_R5 7 116 #define MOXIE_R6 8 117 #define MOXIE_R7 9 118 #define MOXIE_R8 10 119 #define MOXIE_R9 11 120 #define MOXIE_R10 12 121 #define MOXIE_R11 13 122 #define MOXIE_R12 14 123 #define MOXIE_R13 15 124 #define MOXIE_QFP 16 125 #define MOXIE_QAP 17 126 #define MOXIE_PC 18 127 #define MOXIE_CC 19 128 129 #define FIRST_PSEUDO_REGISTER 20 130 131 enum reg_class 132 { 133 NO_REGS, 134 GENERAL_REGS, 135 SPECIAL_REGS, 136 CC_REGS, 137 ALL_REGS, 138 LIM_REG_CLASSES 139 }; 140 141 142 #define REG_CLASS_CONTENTS \ 143 { { 0x00000000 }, /* Empty */ \ 144 { 0x0003FFFF }, /* $fp, $sp, $r0 to $r13, ?fp */ \ 145 { 0x00040000 }, /* $pc */ \ 146 { 0x00080000 }, /* ?cc */ \ 147 { 0x000FFFFF } /* All registers */ \ 148 } 149 150 #define N_REG_CLASSES LIM_REG_CLASSES 151 152 #define REG_CLASS_NAMES {\ 153 "NO_REGS", \ 154 "GENERAL_REGS", \ 155 "SPECIAL_REGS", \ 156 "CC_REGS", \ 157 "ALL_REGS" } 158 159 #define FIXED_REGISTERS { 1, 1, 0, 0, \ 160 0, 0, 0, 0, \ 161 0, 0, 0, 0, \ 162 0, 0, 0, 1, \ 163 1, 1, 1, 1 } 164 165 #define CALL_USED_REGISTERS { 1, 1, 1, 1, \ 166 1, 1, 1, 1, \ 167 0, 0, 0, 0, \ 168 0, 0, 1, 1, \ 169 1, 1, 1, 1 } 170 171 /* We can't copy to or from our CC register. */ 172 #define AVOID_CCMODE_COPIES 1 173 174 /* A C expression whose value is a register class containing hard 175 register REGNO. */ 176 #define REGNO_REG_CLASS(R) ((R < MOXIE_PC) ? GENERAL_REGS : \ 177 (R == MOXIE_CC ? CC_REGS : SPECIAL_REGS)) 178 179 /* The Overall Framework of an Assembler File */ 180 181 #undef ASM_SPEC 182 #define ASM_SPEC "%{!mel:-EB} %{mel:-EL}" 183 #define ASM_COMMENT_START "#" 184 #define ASM_APP_ON "" 185 #define ASM_APP_OFF "" 186 187 #define FILE_ASM_OP "\t.file\n" 188 189 /* Switch to the text or data segment. */ 190 #define TEXT_SECTION_ASM_OP "\t.text" 191 #define DATA_SECTION_ASM_OP "\t.data" 192 193 /* Assembler Commands for Alignment */ 194 195 #define ASM_OUTPUT_ALIGN(STREAM,POWER) \ 196 fprintf (STREAM, "\t.p2align\t%d\n", POWER); 197 198 /* Output and Generation of Labels */ 199 200 #define GLOBAL_ASM_OP "\t.global\t" 201 202 /* Passing Arguments in Registers */ 203 204 /* A C type for declaring a variable that is used as the first 205 argument of `FUNCTION_ARG' and other related values. */ 206 #define CUMULATIVE_ARGS unsigned int 207 208 /* If defined, the maximum amount of space required for outgoing arguments 209 will be computed and placed into the variable 210 `current_function_outgoing_args_size'. No space will be pushed 211 onto the stack for each call; instead, the function prologue should 212 increase the stack frame size by this amount. */ 213 #define ACCUMULATE_OUTGOING_ARGS 1 214 215 /* A C statement (sans semicolon) for initializing the variable CUM 216 for the state at the beginning of the argument list. 217 For moxie, the first arg is passed in register 2 (aka $r0). */ 218 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \ 219 (CUM = MOXIE_R0) 220 221 /* How Scalar Function Values Are Returned */ 222 223 /* STACK AND CALLING */ 224 225 /* Define this macro if pushing a word onto the stack moves the stack 226 pointer to a smaller address. */ 227 #define STACK_GROWS_DOWNWARD 1 228 229 /* Define this if the above stack space is to be considered part of the 230 space allocated by the caller. */ 231 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1 232 #define STACK_PARMS_IN_REG_PARM_AREA 233 234 /* Define this if it is the responsibility of the caller to allocate 235 the area reserved for arguments passed in registers. */ 236 #define REG_PARM_STACK_SPACE(FNDECL) (6 * UNITS_PER_WORD) 237 238 /* Offset from the argument pointer register to the first argument's 239 address. On some machines it may depend on the data type of the 240 function. */ 241 #define FIRST_PARM_OFFSET(F) 12 242 243 /* Define this macro to nonzero value if the addresses of local variable slots 244 are at negative offsets from the frame pointer. */ 245 #define FRAME_GROWS_DOWNWARD 1 246 247 /* Define this macro as a C expression that is nonzero for registers that are 248 used by the epilogue or the return pattern. The stack and frame 249 pointer registers are already assumed to be used as needed. */ 250 #define EPILOGUE_USES(R) (R == MOXIE_R5) 251 252 /* A C expression whose value is RTL representing the location of the 253 incoming return address at the beginning of any function, before 254 the prologue. */ 255 #define INCOMING_RETURN_ADDR_RTX \ 256 gen_frame_mem (Pmode, \ 257 plus_constant (Pmode, stack_pointer_rtx, UNITS_PER_WORD)) 258 259 /* Describe how we implement __builtin_eh_return. */ 260 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N+2) : INVALID_REGNUM) 261 262 /* Store the return handler into the call frame. */ 263 #define EH_RETURN_HANDLER_RTX \ 264 gen_frame_mem (Pmode, \ 265 plus_constant (Pmode, frame_pointer_rtx, UNITS_PER_WORD)) 266 267 /* Storage Layout */ 268 269 #define BITS_BIG_ENDIAN 0 270 #define BYTES_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN ) 271 #define WORDS_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN ) 272 273 /* Alignment required for a function entry point, in bits. */ 274 #define FUNCTION_BOUNDARY 16 275 276 /* Define this macro as a C expression which is nonzero if accessing 277 less than a word of memory (i.e. a `char' or a `short') is no 278 faster than accessing a word of memory. */ 279 #define SLOW_BYTE_ACCESS 1 280 281 /* Number of storage units in a word; normally the size of a 282 general-purpose register, a power of two from 1 or 8. */ 283 #define UNITS_PER_WORD 4 284 285 /* Define this macro to the minimum alignment enforced by hardware 286 for the stack pointer on this machine. The definition is a C 287 expression for the desired alignment (measured in bits). */ 288 #define STACK_BOUNDARY 32 289 290 /* Normal alignment required for function parameters on the stack, in 291 bits. All stack parameters receive at least this much alignment 292 regardless of data type. */ 293 #define PARM_BOUNDARY 32 294 295 /* Alignment of field after `int : 0' in a structure. */ 296 #define EMPTY_FIELD_BOUNDARY 32 297 298 /* No data type wants to be aligned rounder than this. */ 299 #define BIGGEST_ALIGNMENT 32 300 301 /* The best alignment to use in cases where we have a choice. */ 302 #define FASTEST_ALIGNMENT 32 303 304 /* Every structures size must be a multiple of 8 bits. */ 305 #define STRUCTURE_SIZE_BOUNDARY 8 306 307 /* Look at the fundamental type that is used for a bit-field and use 308 that to impose alignment on the enclosing structure. 309 struct s {int a:8}; should have same alignment as "int", not "char". */ 310 #define PCC_BITFIELD_TYPE_MATTERS 1 311 312 /* Largest integer machine mode for structures. If undefined, the default 313 is GET_MODE_SIZE(DImode). */ 314 #define MAX_FIXED_MODE_SIZE 32 315 316 /* Make arrays of chars word-aligned for the same reasons. */ 317 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 318 (TREE_CODE (TYPE) == ARRAY_TYPE \ 319 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 320 && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) 321 322 /* Set this nonzero if move instructions will actually fail to work 323 when given unaligned data. */ 324 #define STRICT_ALIGNMENT 1 325 326 /* Generating Code for Profiling */ 327 #define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0) 328 329 /* Trampolines for Nested Functions. */ 330 #define TRAMPOLINE_SIZE (2 + 6 + 4 + 2 + 6) 331 332 /* Alignment required for trampolines, in bits. */ 333 #define TRAMPOLINE_ALIGNMENT 32 334 335 /* An alias for the machine mode for pointers. */ 336 #define Pmode SImode 337 338 /* An alias for the machine mode used for memory references to 339 functions being called, in `call' RTL expressions. */ 340 #define FUNCTION_MODE QImode 341 342 /* The register number of the stack pointer register, which must also 343 be a fixed register according to `FIXED_REGISTERS'. */ 344 #define STACK_POINTER_REGNUM MOXIE_SP 345 346 /* The register number of the frame pointer register, which is used to 347 access automatic variables in the stack frame. */ 348 #define FRAME_POINTER_REGNUM MOXIE_QFP 349 350 /* The register number of the arg pointer register, which is used to 351 access the function's argument list. */ 352 #define ARG_POINTER_REGNUM MOXIE_QAP 353 354 #define HARD_FRAME_POINTER_REGNUM MOXIE_FP 355 356 #define ELIMINABLE_REGS \ 357 {{ FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \ 358 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} 359 360 /* This macro returns the initial difference between the specified pair 361 of registers. */ 362 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 363 do { \ 364 (OFFSET) = moxie_initial_elimination_offset ((FROM), (TO)); \ 365 } while (0) 366 367 /* A C expression that is nonzero if REGNO is the number of a hard 368 register in which function arguments are sometimes passed. */ 369 #define FUNCTION_ARG_REGNO_P(r) (r >= MOXIE_R0 && r <= MOXIE_R5) 370 371 /* A macro whose definition is the name of the class to which a valid 372 base register must belong. A base register is one used in an 373 address which is the register value plus a displacement. */ 374 #define BASE_REG_CLASS GENERAL_REGS 375 376 #define INDEX_REG_CLASS NO_REGS 377 378 #define HARD_REGNO_OK_FOR_BASE_P(NUM) \ 379 ((unsigned) (NUM) < FIRST_PSEUDO_REGISTER \ 380 && (REGNO_REG_CLASS(NUM) == GENERAL_REGS \ 381 || (NUM) == HARD_FRAME_POINTER_REGNUM)) 382 383 /* A C expression which is nonzero if register number NUM is suitable 384 for use as a base register in operand addresses. */ 385 #ifdef REG_OK_STRICT 386 #define REGNO_OK_FOR_BASE_P(NUM) \ 387 (HARD_REGNO_OK_FOR_BASE_P(NUM) \ 388 || HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)])) 389 #else 390 #define REGNO_OK_FOR_BASE_P(NUM) \ 391 ((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM)) 392 #endif 393 394 /* A C expression which is nonzero if register number NUM is suitable 395 for use as an index register in operand addresses. */ 396 #define REGNO_OK_FOR_INDEX_P(NUM) MOXIE_FP 397 398 /* The maximum number of bytes that a single instruction can move 399 quickly between memory and registers or between two memory 400 locations. */ 401 #define MOVE_MAX 4 402 403 /* All load operations zero extend. */ 404 #define LOAD_EXTEND_OP(MEM) ZERO_EXTEND 405 406 /* A number, the maximum number of registers that can appear in a 407 valid memory address. */ 408 #define MAX_REGS_PER_ADDRESS 1 409 410 /* An alias for a machine mode name. This is the machine mode that 411 elements of a jump-table should have. */ 412 #define CASE_VECTOR_MODE SImode 413 414 /* Run-time Target Specification */ 415 416 #define TARGET_CPU_CPP_BUILTINS() \ 417 { \ 418 builtin_define_std ("moxie"); \ 419 builtin_define_std ("MOXIE"); \ 420 if (TARGET_LITTLE_ENDIAN) \ 421 builtin_define ("__MOXIE_LITTLE_ENDIAN__"); \ 422 else \ 423 builtin_define ("__MOXIE_BIG_ENDIAN__"); \ 424 } 425 426 #define HAS_LONG_UNCOND_BRANCH true 427 428 #endif /* GCC_MOXIE_H */ 429