1 /* Definition of RISC-V target for GNU compiler.
2 Copyright (C) 2011-2022 Free Software Foundation, Inc.
3 Contributed by Andrew Waterman (andrew@sifive.com).
4 Based on MIPS target for GNU compiler.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "config/riscv/riscv-opts.h"
27 /* Target CPU builtins. */
28 #define TARGET_CPU_CPP_BUILTINS() riscv_cpu_cpp_builtins (pfile)
30 /* Target hooks for D language. */
31 #define TARGET_D_CPU_VERSIONS riscv_d_target_versions
32 #define TARGET_D_REGISTER_CPU_TARGET_INFO riscv_d_register_target_info
34 #ifdef TARGET_BIG_ENDIAN_DEFAULT
35 #define DEFAULT_ENDIAN_SPEC "b"
37 #define DEFAULT_ENDIAN_SPEC "l"
40 /* Default target_flags if no switches are specified */
42 #ifndef TARGET_DEFAULT
43 #define TARGET_DEFAULT 0
46 #ifndef RISCV_TUNE_STRING_DEFAULT
47 #define RISCV_TUNE_STRING_DEFAULT "rocket"
50 extern const char *riscv_expand_arch (int argc
, const char **argv
);
51 extern const char *riscv_expand_arch_from_cpu (int argc
, const char **argv
);
52 extern const char *riscv_default_mtune (int argc
, const char **argv
);
54 # define EXTRA_SPEC_FUNCTIONS \
55 { "riscv_expand_arch", riscv_expand_arch }, \
56 { "riscv_expand_arch_from_cpu", riscv_expand_arch_from_cpu }, \
57 { "riscv_default_mtune", riscv_default_mtune },
59 /* Support for a compile-time default CPU, et cetera. The rules are:
60 --with-arch is ignored if -march or -mcpu is specified.
61 --with-abi is ignored if -mabi is specified.
62 --with-tune is ignored if -mtune or -mcpu is specified.
63 --with-isa-spec is ignored if -misa-spec is specified.
65 But using default -march/-mtune value if -mcpu don't have valid option. */
66 #define OPTION_DEFAULT_SPECS \
67 {"tune", "%{!mtune=*:" \
68 " %{!mcpu=*:-mtune=%(VALUE)}" \
69 " %{mcpu=*:-mtune=%:riscv_default_mtune(%* %(VALUE))}}" }, \
70 {"arch", "%{!march=*:" \
71 " %{!mcpu=*:-march=%(VALUE)}" \
72 " %{mcpu=*:%:riscv_expand_arch_from_cpu(%* %(VALUE))}}" }, \
73 {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
74 {"isa_spec", "%{!misa-spec=*:-misa-spec=%(VALUE)}" }, \
78 /* Make this compile time constant for libgcc2 */
79 #define TARGET_64BIT (__riscv_xlen == 64)
80 #endif /* IN_LIBGCC2 */
82 #ifdef HAVE_AS_MISA_SPEC
83 #define ASM_MISA_SPEC "%{misa-spec=*}"
85 #define ASM_MISA_SPEC ""
89 https://gcc.gnu.org/onlinedocs/cpp/Stringizing.html#Stringizing */
90 #define STRINGIZING(s) __STRINGIZING(s)
91 #define __STRINGIZING(s) #s
93 #define MULTILIB_DEFAULTS \
94 {"march=" STRINGIZING (TARGET_RISCV_DEFAULT_ARCH), \
95 "mabi=" STRINGIZING (TARGET_RISCV_DEFAULT_ABI) }
99 %(subtarget_asm_debugging_spec) \
100 %{" FPIE_OR_FPIC_SPEC ":-fpic} \
106 %(subtarget_asm_spec)" \
109 #undef DRIVER_SELF_SPECS
110 #define DRIVER_SELF_SPECS \
111 "%{march=*:%:riscv_expand_arch(%*)} " \
112 "%{!march=*:%{mcpu=*:%:riscv_expand_arch_from_cpu(%*)}} "
114 #define TARGET_DEFAULT_CMODEL CM_MEDLOW
116 #define LOCAL_LABEL_PREFIX "."
117 #define USER_LABEL_PREFIX ""
119 /* Offsets recorded in opcodes are a multiple of this alignment factor.
120 The default for this in 64-bit mode is 8, which causes problems with
121 SFmode register saves. */
122 #define DWARF_CIE_DATA_ALIGNMENT -4
124 /* The mapping from gcc register number to DWARF 2 CFA column number. */
125 #define DWARF_FRAME_REGNUM(REGNO) \
126 (VL_REG_P (REGNO) ? RISCV_DWARF_VL \
127 : VTYPE_REG_P (REGNO) \
128 ? RISCV_DWARF_VTYPE \
129 : (GP_REG_P (REGNO) || FP_REG_P (REGNO) || V_REG_P (REGNO) \
133 /* The DWARF 2 CFA column which tracks the return address. */
134 #define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM
135 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM)
137 /* Describe how we implement __builtin_eh_return. */
138 #define EH_RETURN_DATA_REGNO(N) \
139 ((N) < 4 ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
141 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_ARG_FIRST + 4)
143 /* Target machine storage layout */
145 #define BITS_BIG_ENDIAN 0
146 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
147 #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN)
149 #define MAX_BITS_PER_WORD 64
151 /* Width of a word, in units (bytes). */
152 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
154 #define MIN_UNITS_PER_WORD 4
157 /* Allows SImode op in builtin overflow pattern, see internal-fn.cc. */
158 #undef TARGET_MIN_ARITHMETIC_PRECISION
159 #define TARGET_MIN_ARITHMETIC_PRECISION riscv_min_arithmetic_precision
161 /* The `Q' extension is not yet supported. */
162 #define UNITS_PER_FP_REG (TARGET_DOUBLE_FLOAT ? 8 : 4)
163 /* Size per vector register. For zve32*, size = poly (4, 4). Otherwise, size = poly (8, 8). */
164 #define UNITS_PER_V_REG (riscv_vector_chunks * riscv_bytes_per_vector_chunk)
166 /* The largest type that can be passed in floating-point registers. */
167 #define UNITS_PER_FP_ARG \
168 ((riscv_abi == ABI_ILP32 || riscv_abi == ABI_ILP32E \
169 || riscv_abi == ABI_LP64) \
171 : ((riscv_abi == ABI_ILP32F || riscv_abi == ABI_LP64F) ? 4 : 8))
173 /* Set the sizes of the core types. */
174 #define SHORT_TYPE_SIZE 16
175 #define INT_TYPE_SIZE 32
176 #define LONG_LONG_TYPE_SIZE 64
177 #define POINTER_SIZE (riscv_abi >= ABI_LP64 ? 64 : 32)
178 #define LONG_TYPE_SIZE POINTER_SIZE
180 #define FLOAT_TYPE_SIZE 32
181 #define DOUBLE_TYPE_SIZE 64
182 #define LONG_DOUBLE_TYPE_SIZE 128
184 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
185 #define PARM_BOUNDARY BITS_PER_WORD
187 /* Allocation boundary (in *bits*) for the code of a function. */
188 #define FUNCTION_BOUNDARY (TARGET_RVC ? 16 : 32)
190 /* The smallest supported stack boundary the calling convention supports. */
191 #define STACK_BOUNDARY \
192 (riscv_abi == ABI_ILP32E ? BITS_PER_WORD : 2 * BITS_PER_WORD)
194 /* The ABI stack alignment. */
195 #define ABI_STACK_BOUNDARY (riscv_abi == ABI_ILP32E ? BITS_PER_WORD : 128)
197 /* There is no point aligning anything to a rounder boundary than this. */
198 #define BIGGEST_ALIGNMENT 128
200 /* The user-level ISA permits unaligned accesses, but they are not required
201 of the privileged architecture. */
202 #define STRICT_ALIGNMENT TARGET_STRICT_ALIGN
204 /* Define this if you wish to imitate the way many other C compilers
205 handle alignment of bitfields and the structures that contain
208 The behavior is that the type written for a bit-field (`int',
209 `short', or other integer type) imposes an alignment for the
210 entire structure, as if the structure really did contain an
211 ordinary field of that type. In addition, the bit-field is placed
212 within the structure so that it would fit within such a field,
213 not crossing a boundary for it.
215 Thus, on most machines, a bit-field whose type is written as `int'
216 would not cross a four-byte boundary, and would force four-byte
217 alignment for the whole structure. (The alignment used may not
218 be four bytes; it is controlled by the other alignment
221 If the macro is defined, its definition should be a C expression;
222 a nonzero value for the expression enables this behavior. */
224 #define PCC_BITFIELD_TYPE_MATTERS 1
226 /* An integer expression for the size in bits of the largest integer machine
227 mode that should actually be used. We allow pairs of registers. */
228 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TARGET_64BIT ? TImode : DImode)
230 /* DATA_ALIGNMENT and LOCAL_ALIGNMENT common definition. */
231 #define RISCV_EXPAND_ALIGNMENT(COND, TYPE, ALIGN) \
232 (((COND) && ((ALIGN) < BITS_PER_WORD) \
233 && (TREE_CODE (TYPE) == ARRAY_TYPE \
234 || TREE_CODE (TYPE) == UNION_TYPE \
235 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
237 /* If defined, a C expression to compute the alignment for a static
238 variable. TYPE is the data type, and ALIGN is the alignment that
239 the object would ordinarily have. The value of this macro is used
240 instead of that alignment to align the object.
242 If this macro is not defined, then ALIGN is used.
244 One use of this macro is to increase alignment of medium-size
245 data to make it all fit in fewer cache lines. Another is to
246 cause character arrays to be word-aligned so that `strcpy' calls
247 that copy constants to character arrays can be done inline. */
249 #define DATA_ALIGNMENT(TYPE, ALIGN) \
250 RISCV_EXPAND_ALIGNMENT (riscv_align_data_type == riscv_align_data_type_xlen, \
253 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause
254 character arrays to be word-aligned so that `strcpy' calls that copy
255 constants to character arrays can be done inline, and 'strcmp' can be
256 optimised to use word loads. */
257 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
258 RISCV_EXPAND_ALIGNMENT (true, TYPE, ALIGN)
260 /* Define if operations between registers always perform the operation
261 on the full register even if a narrower mode is specified. */
262 #define WORD_REGISTER_OPERATIONS 1
264 /* When in 64-bit mode, move insns will sign extend SImode and CCmode
265 moves. All other references are zero extended. */
266 #define LOAD_EXTEND_OP(MODE) \
267 (TARGET_64BIT && (MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND)
269 /* Define this macro if it is advisable to hold scalars in registers
270 in a wider mode than that declared by the program. In such cases,
271 the value is constrained to be within the bounds of the declared
272 type, but kept valid in the wider mode. The signedness of the
273 extension may differ from that of the type. */
275 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
276 if (GET_MODE_CLASS (MODE) == MODE_INT \
277 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
279 if ((MODE) == SImode) \
281 (MODE) = word_mode; \
284 /* Pmode is always the same as ptr_mode, but not always the same as word_mode.
285 Extensions of pointers to word_mode must be signed. */
286 #define POINTERS_EXTEND_UNSIGNED false
288 /* Define if loading short immediate values into registers sign extends. */
289 #define SHORT_IMMEDIATES_SIGN_EXTEND 1
291 /* Standard register usage. */
293 /* Number of hardware registers. We have:
295 - 32 integer registers
296 - 32 floating point registers
299 - FRAME_POINTER_REGNUM
302 - 30 unused registers for future expansion
303 - 32 vector registers */
305 #define FIRST_PSEUDO_REGISTER 128
307 /* x0, sp, gp, and tp are fixed. */
309 #define FIXED_REGISTERS \
310 { /* General registers. */ \
311 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
312 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
313 /* Floating-point registers. */ \
314 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
315 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
317 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
318 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
319 /* Vector registers. */ \
320 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
321 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \
324 /* a0-a7, t0-t6, fa0-fa7, and ft0-ft11 are volatile across calls.
325 The call RTLs themselves clobber ra. */
327 #define CALL_USED_REGISTERS \
328 { /* General registers. */ \
329 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
330 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
331 /* Floating-point registers. */ \
332 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
333 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
335 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
336 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
337 /* Vector registers. */ \
338 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
339 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
342 /* Select a register mode required for caller save of hard regno REGNO.
343 Contrary to what is documented, the default is not the smallest suitable
344 mode but the largest suitable mode for the given (REGNO, NREGS) pair and
345 it quickly creates paradoxical subregs that can be problematic. */
346 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
347 ((MODE) == VOIDmode ? choose_hard_reg_mode (REGNO, NREGS, NULL) : (MODE))
349 /* Internal macros to classify an ISA register's type. */
351 #define GP_REG_FIRST 0
352 #define GP_REG_LAST (TARGET_RVE ? 15 : 31)
353 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
355 #define FP_REG_FIRST 32
356 #define FP_REG_LAST 63
357 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
359 #define V_REG_FIRST 96
360 #define V_REG_LAST 127
361 #define V_REG_NUM (V_REG_LAST - V_REG_FIRST + 1)
363 /* The DWARF 2 CFA column which tracks the return address from a
364 signal handler context. This means that to maintain backwards
365 compatibility, no hard register can be assigned this column if it
366 would need to be handled by the DWARF unwinder. */
367 #define DWARF_ALT_FRAME_RETURN_COLUMN 64
369 #define GP_REG_P(REGNO) \
370 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
371 #define FP_REG_P(REGNO) \
372 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
373 #define V_REG_P(REGNO) \
374 ((unsigned int) ((int) (REGNO) - V_REG_FIRST) < V_REG_NUM)
375 #define VL_REG_P(REGNO) ((REGNO) == VL_REGNUM)
376 #define VTYPE_REG_P(REGNO) ((REGNO) == VTYPE_REGNUM)
378 /* True when REGNO is in SIBCALL_REGS set. */
379 #define SIBCALL_REG_P(REGNO) \
380 TEST_HARD_REG_BIT (reg_class_contents[SIBCALL_REGS], REGNO)
382 #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
384 /* Use s0 as the frame pointer if it is so requested. */
385 #define HARD_FRAME_POINTER_REGNUM 8
386 #define STACK_POINTER_REGNUM 2
387 #define THREAD_POINTER_REGNUM 4
389 /* These two registers don't really exist: they get eliminated to either
390 the stack or hard frame pointer. */
391 #define ARG_POINTER_REGNUM 64
392 #define FRAME_POINTER_REGNUM 65
394 /* Define Dwarf for RVV. */
395 #define RISCV_DWARF_VL (4096 + 0xc20)
396 #define RISCV_DWARF_VTYPE (4096 + 0xc21)
398 /* Register in which static-chain is passed to a function. */
399 #define STATIC_CHAIN_REGNUM (GP_TEMP_FIRST + 2)
401 /* Registers used as temporaries in prologue/epilogue code.
403 The prologue registers mustn't conflict with any
404 incoming arguments, the static chain pointer, or the frame pointer.
405 The epilogue temporary mustn't conflict with the return registers,
406 the frame pointer, the EH stack adjustment, or the EH data registers. */
408 #define RISCV_PROLOGUE_TEMP_REGNUM (GP_TEMP_FIRST)
409 #define RISCV_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, RISCV_PROLOGUE_TEMP_REGNUM)
411 #define RISCV_CALL_ADDRESS_TEMP_REGNUM (GP_TEMP_FIRST + 1)
412 #define RISCV_CALL_ADDRESS_TEMP(MODE) \
413 gen_rtx_REG (MODE, RISCV_CALL_ADDRESS_TEMP_REGNUM)
415 #define MCOUNT_NAME "_mcount"
417 #define NO_PROFILE_COUNTERS 1
419 /* Emit rtl for profiling. Output assembler code to FILE
420 to call "_mcount" for profiling a function entry. */
421 #define PROFILE_HOOK(LABEL) \
424 ra = get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM); \
425 fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_NAME); \
426 emit_library_call (fun, LCT_NORMAL, VOIDmode, ra, Pmode); \
429 /* All the work done in PROFILE_HOOK, but still required. */
430 #define FUNCTION_PROFILER(STREAM, LABELNO) do { } while (0)
432 /* Define this macro if it is as good or better to call a constant
433 function address than to call an address kept in a register. */
434 #define NO_FUNCTION_CSE 1
436 /* Define the classes of registers for register constraints in the
437 machine description. Also define ranges of constants.
439 One of the classes must always be named ALL_REGS and include all hard regs.
440 If there is more than one class, another class must be named NO_REGS
441 and contain no registers.
443 The name GENERAL_REGS must be the name of a class (or an alias for
444 another name such as ALL_REGS). This is the class of registers
445 that is allowed by "g" or "r" in a register constraint.
446 Also, registers outside this class are allocated only when
447 instructions express preferences for them.
449 The classes must be numbered in nondecreasing order; that is,
450 a larger-numbered class must never be contained completely
451 in a smaller-numbered class.
453 For any two classes, it is very desirable that there be another
454 class that represents their union. */
458 NO_REGS
, /* no registers in set */
459 SIBCALL_REGS
, /* registers used by indirect sibcalls */
460 JALR_REGS
, /* registers used by indirect calls */
461 GR_REGS
, /* integer registers */
462 FP_REGS
, /* floating-point registers */
463 FRAME_REGS
, /* arg pointer and frame pointer */
464 VL_REGS
, /* vl register */
465 VTYPE_REGS
, /* vype register */
466 VM_REGS
, /* v0.t registers */
467 VD_REGS
, /* vector registers except v0.t */
468 V_REGS
, /* vector registers */
469 ALL_REGS
, /* all registers */
470 LIM_REG_CLASSES
/* max value + 1 */
473 #define N_REG_CLASSES (int) LIM_REG_CLASSES
475 #define GENERAL_REGS GR_REGS
477 /* An initializer containing the names of the register classes as C
478 string constants. These names are used in writing some of the
481 #define REG_CLASS_NAMES \
497 /* An initializer containing the contents of the register classes,
498 as integers which are bit masks. The Nth integer specifies the
499 contents of class N. The way the integer MASK is interpreted is
500 that register R is in the class if `MASK & (1 << R)' is 1.
502 When the machine has more than 32 registers, an integer does not
503 suffice. Then the integers are replaced by sub-initializers,
504 braced groupings containing several integers. Each
505 sub-initializer must be suitable as an initializer for the type
506 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
508 #define REG_CLASS_CONTENTS \
510 { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
511 { 0xf003fcc0, 0x00000000, 0x00000000, 0x00000000 }, /* SIBCALL_REGS */ \
512 { 0xffffffc0, 0x00000000, 0x00000000, 0x00000000 }, /* JALR_REGS */ \
513 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000 }, /* GR_REGS */ \
514 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000 }, /* FP_REGS */ \
515 { 0x00000000, 0x00000000, 0x00000003, 0x00000000 }, /* FRAME_REGS */ \
516 { 0x00000000, 0x00000000, 0x00000004, 0x00000000 }, /* VL_REGS */ \
517 { 0x00000000, 0x00000000, 0x00000008, 0x00000000 }, /* VTYPE_REGS */ \
518 { 0x00000000, 0x00000000, 0x00000000, 0x00000001 }, /* V0_REGS */ \
519 { 0x00000000, 0x00000000, 0x00000000, 0xfffffffe }, /* VNoV0_REGS */ \
520 { 0x00000000, 0x00000000, 0x00000000, 0xffffffff }, /* V_REGS */ \
521 { 0xffffffff, 0xffffffff, 0x00000003, 0x00000000 } /* ALL_REGS */ \
524 /* A C expression whose value is a register class containing hard
525 register REGNO. In general there is more that one such class;
526 choose a class which is "minimal", meaning that no smaller class
527 also contains the register. */
529 #define REGNO_REG_CLASS(REGNO) riscv_regno_to_class[ (REGNO) ]
531 /* A macro whose definition is the name of the class to which a
532 valid base register must belong. A base register is one used in
533 an address which is the register value plus a displacement. */
535 #define BASE_REG_CLASS GR_REGS
537 /* A macro whose definition is the name of the class to which a
538 valid index register must belong. An index register is one used
539 in an address where its value is either multiplied by a scale
540 factor or added to another register (as well as added to a
543 #define INDEX_REG_CLASS NO_REGS
545 /* We generally want to put call-clobbered registers ahead of
546 call-saved ones. (IRA expects this.) */
548 #define REG_ALLOC_ORDER \
550 /* Call-clobbered GPRs. */ \
551 15, 14, 13, 12, 11, 10, 16, 17, 6, 28, 29, 30, 31, 5, 7, 1, \
552 /* Call-saved GPRs. */ \
553 8, 9, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, \
554 /* GPRs that can never be exposed to the register allocator. */ \
556 /* Call-clobbered FPRs. */ \
557 47, 46, 45, 44, 43, 42, 32, 33, 34, 35, 36, 37, 38, 39, 48, 49, \
559 /* Call-saved FPRs. */ \
560 40, 41, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
562 120, 121, 122, 123, 124, 125, 126, 127, \
564 104, 105, 106, 107, 108, 109, 110, 111, \
565 112, 113, 114, 115, 116, 117, 118, 119, \
567 96, 97, 98, 99, 100, 101, 102, 103, \
568 /* None of the remaining classes have defined call-saved \
573 /* True if VALUE is a signed 12-bit number. */
575 #define SMALL_OPERAND(VALUE) \
576 ((unsigned HOST_WIDE_INT) (VALUE) + IMM_REACH/2 < IMM_REACH)
578 #define POLY_SMALL_OPERAND_P(POLY_VALUE) \
579 (POLY_VALUE.is_constant () ? \
580 SMALL_OPERAND (POLY_VALUE.to_constant ()) : false)
582 /* True if VALUE can be loaded into a register using LUI. */
584 #define LUI_OPERAND(VALUE) \
585 (((VALUE) | ((1UL<<31) - IMM_REACH)) == ((1UL<<31) - IMM_REACH) \
586 || ((VALUE) | ((1UL<<31) - IMM_REACH)) + IMM_REACH == 0)
588 /* If this is a single bit mask, then we can load it with bseti. Special
589 handling of SImode 0x80000000 on RV64 is done in riscv_build_integer_1. */
590 #define SINGLE_BIT_MASK_OPERAND(VALUE) \
591 (pow2p_hwi (TARGET_64BIT \
593 : ((VALUE) & ((HOST_WIDE_INT_1U << 32)-1))))
595 /* Stack layout; function entry, exit and calling. */
597 #define STACK_GROWS_DOWNWARD 1
599 #define FRAME_GROWS_DOWNWARD 1
601 #define RETURN_ADDR_RTX riscv_return_addr
603 #define ELIMINABLE_REGS \
604 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
605 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
606 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
607 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} \
609 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
610 (OFFSET) = riscv_initial_elimination_offset (FROM, TO)
612 /* Allocate stack space for arguments at the beginning of each function. */
613 #define ACCUMULATE_OUTGOING_ARGS 1
615 /* The argument pointer always points to the first argument. */
616 #define FIRST_PARM_OFFSET(FNDECL) 0
618 #define REG_PARM_STACK_SPACE(FNDECL) 0
620 /* Define this if it is the responsibility of the caller to
621 allocate the area reserved for arguments passed in registers.
622 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
623 of this macro is to determine whether the space is included in
624 `crtl->outgoing_args_size'. */
625 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
627 #define PREFERRED_STACK_BOUNDARY riscv_stack_boundary
629 /* Symbolic macros for the registers used to return integer and floating
632 #define GP_RETURN GP_ARG_FIRST
633 #define FP_RETURN (UNITS_PER_FP_ARG == 0 ? GP_RETURN : FP_ARG_FIRST)
635 #define MAX_ARGS_IN_REGISTERS (riscv_abi == ABI_ILP32E ? 6 : 8)
637 /* Symbolic macros for the first/last argument registers. */
639 #define GP_ARG_FIRST (GP_REG_FIRST + 10)
640 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
641 #define GP_TEMP_FIRST (GP_REG_FIRST + 5)
642 #define FP_ARG_FIRST (FP_REG_FIRST + 10)
643 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
645 #define CALLEE_SAVED_REG_NUMBER(REGNO) \
646 ((REGNO) >= 8 && (REGNO) <= 9 ? (REGNO) - 8 : \
647 (REGNO) >= 18 && (REGNO) <= 27 ? (REGNO) - 16 : -1)
649 #define LIBCALL_VALUE(MODE) \
650 riscv_function_value (NULL_TREE, NULL_TREE, MODE)
652 #define FUNCTION_VALUE(VALTYPE, FUNC) \
653 riscv_function_value (VALTYPE, FUNC, VOIDmode)
655 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN)
657 /* 1 if N is a possible register number for function argument passing.
658 We have no FP argument registers when soft-float. */
660 /* Accept arguments in a0-a7, and in fa0-fa7 if permitted by the ABI. */
661 #define FUNCTION_ARG_REGNO_P(N) \
662 (IN_RANGE ((N), GP_ARG_FIRST, GP_ARG_LAST) \
663 || (UNITS_PER_FP_ARG && IN_RANGE ((N), FP_ARG_FIRST, FP_ARG_LAST)))
666 /* Number of integer registers used so far, up to MAX_ARGS_IN_REGISTERS. */
667 unsigned int num_gprs
;
669 /* Number of floating-point registers used so far, likewise. */
670 unsigned int num_fprs
;
673 /* Initialize a variable CUM of type CUMULATIVE_ARGS
674 for a call to a function whose data type is FNTYPE.
675 For a library call, FNTYPE is 0. */
677 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
678 memset (&(CUM), 0, sizeof (CUM))
680 #define EPILOGUE_USES(REGNO) riscv_epilogue_uses (REGNO)
682 /* Align based on stack boundary, which might have been set by the user. */
683 #define RISCV_STACK_ALIGN(LOC) \
684 (((LOC) + ((PREFERRED_STACK_BOUNDARY/8)-1)) & -(PREFERRED_STACK_BOUNDARY/8))
686 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
687 the stack pointer does not matter. The value is tested only in
688 functions that have frame pointers.
689 No definition is equivalent to always zero. */
691 #define EXIT_IGNORE_STACK 1
694 /* Trampolines are a block of code followed by two pointers. */
696 #define TRAMPOLINE_CODE_SIZE 16
697 #define TRAMPOLINE_SIZE \
699 ? TRAMPOLINE_CODE_SIZE \
700 : (TRAMPOLINE_CODE_SIZE + POINTER_SIZE * 2))
701 #define TRAMPOLINE_ALIGNMENT POINTER_SIZE
703 /* Addressing modes, and classification of registers for them. */
705 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
706 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
707 riscv_regno_mode_ok_for_base_p (REGNO, MODE, 1)
709 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
710 and check its validity for a certain class.
711 We have two alternate definitions for each of them.
712 The usual definition accepts all pseudo regs; the other rejects them all.
713 The symbol REG_OK_STRICT causes the latter definition to be used.
715 Most source files want to accept pseudo regs in the hope that
716 they will get allocated to the class that the insn wants them to be in.
717 Some source files that are used after register allocation
718 need to be strict. */
720 #ifndef REG_OK_STRICT
721 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
722 riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
724 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
725 riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
728 #define REG_OK_FOR_INDEX_P(X) 0
730 /* Maximum number of registers that can appear in a valid memory address. */
732 #define MAX_REGS_PER_ADDRESS 1
734 #define CONSTANT_ADDRESS_P(X) \
735 (CONSTANT_P (X) && memory_address_p (SImode, X))
737 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
738 'the start of the function that this code is output in'. */
740 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
742 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
743 asm_fprintf ((FILE), "%U%s", \
744 XSTR (XEXP (DECL_RTL (current_function_decl), \
747 asm_fprintf ((FILE), "%U%s", (NAME)); \
750 #define JUMP_TABLES_IN_TEXT_SECTION 0
751 #define CASE_VECTOR_MODE SImode
752 #define CASE_VECTOR_PC_RELATIVE (riscv_cmodel != CM_MEDLOW)
754 /* The load-address macro is used for PC-relative addressing of symbols
755 that bind locally. Don't use it for symbols that should be addressed
756 via the GOT. Also, avoid it for CM_MEDLOW, where LUI addressing
757 currently results in more opportunities for linker relaxation. */
758 #define USE_LOAD_ADDRESS_MACRO(sym) \
759 (!TARGET_EXPLICIT_RELOCS && \
761 && ((SYMBOL_REF_P (sym) && SYMBOL_REF_LOCAL_P (sym)) \
762 || ((GET_CODE (sym) == CONST) \
763 && SYMBOL_REF_P (XEXP (XEXP (sym, 0),0)) \
764 && SYMBOL_REF_LOCAL_P (XEXP (XEXP (sym, 0),0))))) \
765 || riscv_cmodel == CM_MEDANY))
767 /* Define this as 1 if `char' should by default be signed; else as 0. */
768 #define DEFAULT_SIGNED_CHAR 0
770 #define MOVE_MAX UNITS_PER_WORD
771 #define MAX_MOVE_MAX 8
773 /* The SPARC port says:
774 Nonzero if access to memory by bytes is slow and undesirable.
775 For RISC chips, it means that access to memory by bytes is no
776 better than access by words when possible, so grab a whole word
777 and maybe make use of that. */
778 #define SLOW_BYTE_ACCESS 1
780 /* Using SHIFT_COUNT_TRUNCATED is discouraged, so we handle this with patterns
781 in the md file instead. */
782 #define SHIFT_COUNT_TRUNCATED 0
784 /* Specify the machine mode that pointers have.
785 After generation of rtl, the compiler makes no further distinction
786 between pointers and any other objects of this machine mode. */
788 #define Pmode word_mode
790 /* Give call MEMs SImode since it is the "most permissive" mode
791 for both 32-bit and 64-bit targets. */
793 #define FUNCTION_MODE SImode
795 /* A C expression for the cost of a branch instruction. A value of 2
796 seems to minimize code size. */
798 #define BRANCH_COST(speed_p, predictable_p) \
799 ((!(speed_p) || (predictable_p)) ? 2 : riscv_branch_cost)
801 /* True if the target optimizes short forward branches around integer
802 arithmetic instructions into predicated operations, e.g., for
803 conditional-move operations. The macro assumes that all branch
804 instructions (BEQ, BNE, BLT, BLTU, BGE, BGEU, C.BEQZ, and C.BNEZ)
805 support this feature. The macro further assumes that any integer
806 arithmetic and logical operation (ADD[I], SUB, SLL[I], SRL[I], SRA[I],
807 SLT[I][U], AND[I], XOR[I], OR[I], LUI, AUIPC, and their compressed
808 counterparts, including C.MV and C.LI) can be in the branch shadow. */
810 #define TARGET_SFB_ALU (riscv_microarchitecture == sifive_7)
812 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
814 /* Control the assembler format that we output. */
816 /* Output to assembler file text saying following lines
817 may contain character constants, extra white space, comments, etc. */
820 #define ASM_APP_ON " #APP\n"
823 /* Output to assembler file text saying following lines
824 no longer contain unusual constructs. */
827 #define ASM_APP_OFF " #NO_APP\n"
830 #define REGISTER_NAMES \
831 { "zero","ra", "sp", "gp", "tp", "t0", "t1", "t2", \
832 "s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", \
833 "a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7", \
834 "s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6", \
835 "ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", \
836 "fs0", "fs1", "fa0", "fa1", "fa2", "fa3", "fa4", "fa5", \
837 "fa6", "fa7", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", \
838 "fs8", "fs9", "fs10","fs11","ft8", "ft9", "ft10","ft11", \
839 "arg", "frame", "vl", "vtype", "N/A", "N/A", "N/A", "N/A", \
840 "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", \
841 "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", \
842 "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", \
843 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
844 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
845 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
846 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31",}
848 #define ADDITIONAL_REGISTER_NAMES \
850 { "x0", 0 + GP_REG_FIRST }, \
851 { "x1", 1 + GP_REG_FIRST }, \
852 { "x2", 2 + GP_REG_FIRST }, \
853 { "x3", 3 + GP_REG_FIRST }, \
854 { "x4", 4 + GP_REG_FIRST }, \
855 { "x5", 5 + GP_REG_FIRST }, \
856 { "x6", 6 + GP_REG_FIRST }, \
857 { "x7", 7 + GP_REG_FIRST }, \
858 { "x8", 8 + GP_REG_FIRST }, \
859 { "x9", 9 + GP_REG_FIRST }, \
860 { "x10", 10 + GP_REG_FIRST }, \
861 { "x11", 11 + GP_REG_FIRST }, \
862 { "x12", 12 + GP_REG_FIRST }, \
863 { "x13", 13 + GP_REG_FIRST }, \
864 { "x14", 14 + GP_REG_FIRST }, \
865 { "x15", 15 + GP_REG_FIRST }, \
866 { "x16", 16 + GP_REG_FIRST }, \
867 { "x17", 17 + GP_REG_FIRST }, \
868 { "x18", 18 + GP_REG_FIRST }, \
869 { "x19", 19 + GP_REG_FIRST }, \
870 { "x20", 20 + GP_REG_FIRST }, \
871 { "x21", 21 + GP_REG_FIRST }, \
872 { "x22", 22 + GP_REG_FIRST }, \
873 { "x23", 23 + GP_REG_FIRST }, \
874 { "x24", 24 + GP_REG_FIRST }, \
875 { "x25", 25 + GP_REG_FIRST }, \
876 { "x26", 26 + GP_REG_FIRST }, \
877 { "x27", 27 + GP_REG_FIRST }, \
878 { "x28", 28 + GP_REG_FIRST }, \
879 { "x29", 29 + GP_REG_FIRST }, \
880 { "x30", 30 + GP_REG_FIRST }, \
881 { "x31", 31 + GP_REG_FIRST }, \
882 { "f0", 0 + FP_REG_FIRST }, \
883 { "f1", 1 + FP_REG_FIRST }, \
884 { "f2", 2 + FP_REG_FIRST }, \
885 { "f3", 3 + FP_REG_FIRST }, \
886 { "f4", 4 + FP_REG_FIRST }, \
887 { "f5", 5 + FP_REG_FIRST }, \
888 { "f6", 6 + FP_REG_FIRST }, \
889 { "f7", 7 + FP_REG_FIRST }, \
890 { "f8", 8 + FP_REG_FIRST }, \
891 { "f9", 9 + FP_REG_FIRST }, \
892 { "f10", 10 + FP_REG_FIRST }, \
893 { "f11", 11 + FP_REG_FIRST }, \
894 { "f12", 12 + FP_REG_FIRST }, \
895 { "f13", 13 + FP_REG_FIRST }, \
896 { "f14", 14 + FP_REG_FIRST }, \
897 { "f15", 15 + FP_REG_FIRST }, \
898 { "f16", 16 + FP_REG_FIRST }, \
899 { "f17", 17 + FP_REG_FIRST }, \
900 { "f18", 18 + FP_REG_FIRST }, \
901 { "f19", 19 + FP_REG_FIRST }, \
902 { "f20", 20 + FP_REG_FIRST }, \
903 { "f21", 21 + FP_REG_FIRST }, \
904 { "f22", 22 + FP_REG_FIRST }, \
905 { "f23", 23 + FP_REG_FIRST }, \
906 { "f24", 24 + FP_REG_FIRST }, \
907 { "f25", 25 + FP_REG_FIRST }, \
908 { "f26", 26 + FP_REG_FIRST }, \
909 { "f27", 27 + FP_REG_FIRST }, \
910 { "f28", 28 + FP_REG_FIRST }, \
911 { "f29", 29 + FP_REG_FIRST }, \
912 { "f30", 30 + FP_REG_FIRST }, \
913 { "f31", 31 + FP_REG_FIRST }, \
916 /* Globalizing directive for a label. */
917 #define GLOBAL_ASM_OP "\t.globl\t"
919 /* This is how to store into the string LABEL
920 the symbol_ref name of an internal numbered label where
921 PREFIX is the class of label and NUM is the number within the class.
922 This is suitable for output with `assemble_name'. */
924 #undef ASM_GENERATE_INTERNAL_LABEL
925 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
926 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
928 /* This is how to output an element of a case-vector that is absolute. */
930 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
931 fprintf (STREAM, "\t.word\t%sL%d\n", LOCAL_LABEL_PREFIX, VALUE)
933 /* This is how to output an element of a PIC case-vector. */
935 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
936 fprintf (STREAM, "\t.word\t%sL%d-%sL%d\n", \
937 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL)
939 /* This is how to output an assembler line
940 that says to advance the location counter
941 to a multiple of 2**LOG bytes. */
943 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
944 fprintf (STREAM, "\t.align\t%d\n", (LOG))
946 /* Define the strings to put out for each section in the object file. */
947 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
948 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
949 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
950 #define BSS_SECTION_ASM_OP "\t.bss"
951 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\",@nobits"
952 #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\",@progbits"
954 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
957 fprintf (STREAM, "\taddi\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
958 reg_names[STACK_POINTER_REGNUM], \
959 reg_names[STACK_POINTER_REGNUM], \
960 TARGET_64BIT ? "sd" : "sw", \
962 reg_names[STACK_POINTER_REGNUM]); \
966 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
969 fprintf (STREAM, "\t%s\t%s,0(%s)\n\taddi\t%s,%s,8\n", \
970 TARGET_64BIT ? "ld" : "lw", \
972 reg_names[STACK_POINTER_REGNUM], \
973 reg_names[STACK_POINTER_REGNUM], \
974 reg_names[STACK_POINTER_REGNUM]); \
978 #define ASM_COMMENT_START "#"
981 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
984 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
986 /* The maximum number of bytes copied by one iteration of a cpymemsi loop. */
988 #define RISCV_MAX_MOVE_BYTES_PER_LOOP_ITER (UNITS_PER_WORD * 4)
990 /* The maximum number of bytes that can be copied by a straight-line
991 cpymemsi implementation. */
993 #define RISCV_MAX_MOVE_BYTES_STRAIGHT (RISCV_MAX_MOVE_BYTES_PER_LOOP_ITER * 3)
995 /* If a memory-to-memory move would take MOVE_RATIO or more simple
996 move-instruction pairs, we will do a cpymem or libcall instead.
997 Do not use move_by_pieces at all when strict alignment is not
998 in effect but the target has slow unaligned accesses; in this
999 case, cpymem or libcall is more efficient. */
1001 #define MOVE_RATIO(speed) \
1002 (!STRICT_ALIGNMENT && riscv_slow_unaligned_access_p ? 1 : \
1003 (speed) ? RISCV_MAX_MOVE_BYTES_PER_LOOP_ITER / UNITS_PER_WORD : \
1004 CLEAR_RATIO (speed) / 2)
1006 /* For CLEAR_RATIO, when optimizing for size, give a better estimate
1007 of the length of a memset call, but use the default otherwise. */
1009 #define CLEAR_RATIO(speed) ((speed) ? 16 : 6)
1011 /* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
1012 optimizing for size adjust the ratio to account for the overhead of
1013 loading the constant and replicating it across the word. */
1015 #define SET_RATIO(speed) (CLEAR_RATIO (speed) - ((speed) ? 0 : 2))
1017 #ifndef USED_FOR_TARGET
1018 extern const enum reg_class riscv_regno_to_class
[];
1019 extern bool riscv_slow_unaligned_access_p
;
1020 extern unsigned riscv_stack_boundary
;
1021 extern unsigned riscv_bytes_per_vector_chunk
;
1022 extern poly_uint16 riscv_vector_chunks
;
1023 /* The number of bits and bytes in a RVV vector. */
1024 #define BITS_PER_RISCV_VECTOR (poly_uint16 (riscv_vector_chunks * riscv_bytes_per_vector_chunk * 8))
1025 #define BYTES_PER_RISCV_VECTOR (poly_uint16 (riscv_vector_chunks * riscv_bytes_per_vector_chunk))
1028 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
1029 (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
1032 "%{march=rv32*:32}" \
1033 "%{march=rv64*:64}" \
1036 "%{mabi=ilp32:ilp32}" \
1037 "%{mabi=ilp32e:ilp32e}" \
1038 "%{mabi=ilp32f:ilp32f}" \
1039 "%{mabi=ilp32d:ilp32d}" \
1040 "%{mabi=lp64:lp64}" \
1041 "%{mabi=lp64f:lp64f}" \
1042 "%{mabi=lp64d:lp64d}" \
1044 /* ISA constants needed for code generation. */
1045 #define OPCODE_LW 0x2003
1046 #define OPCODE_LD 0x3003
1047 #define OPCODE_AUIPC 0x17
1048 #define OPCODE_JALR 0x67
1049 #define OPCODE_LUI 0x37
1050 #define OPCODE_ADDI 0x13
1052 #define SHIFT_RS1 15
1053 #define SHIFT_IMM 20
1056 #define C_SxSP_BITS 6
1058 #define IMM_REACH (1LL << IMM_BITS)
1059 #define CONST_HIGH_PART(VALUE) (((VALUE) + (IMM_REACH/2)) & ~(IMM_REACH-1))
1060 #define CONST_LOW_PART(VALUE) ((VALUE) - CONST_HIGH_PART (VALUE))
1062 #define SWSP_REACH (4LL << C_SxSP_BITS)
1063 #define SDSP_REACH (8LL << C_SxSP_BITS)
1065 /* This is the maximum value that can be represented in a compressed load/store
1066 offset (an unsigned 5-bit value scaled by 4). */
1067 #define CSW_MAX_OFFSET (((4LL << C_S_BITS) - 1) & ~3)
1069 /* Called from RISCV_REORG, this is defined in riscv-sr.cc. */
1071 extern void riscv_remove_unneeded_save_restore_calls (void);
1073 #define HARD_REGNO_RENAME_OK(FROM, TO) riscv_hard_regno_rename_ok (FROM, TO)
1075 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1076 ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
1077 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1078 ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
1080 #define TARGET_SUPPORTS_WIDE_INT 1
1082 #endif /* ! GCC_RISCV_H */