1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP
27 #define CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP
28
29 #include "asm/assembler.hpp"
30
31 // MacroAssembler extends Assembler by frequently used macros.
32 //
33 // Instructions for which a 'better' code sequence exists depending
34 // on arguments should also go in here.
35
36 class MacroAssembler: public Assembler {
37 friend class LIR_Assembler;
38
39 public:
40 using Assembler::mov;
41 using Assembler::movi;
42
43 protected:
44
45 // Support for VM calls
46 //
47 // This is the base routine called by the different versions of call_VM_leaf. The interpreter
48 // may customize this version by overriding it for its purposes (e.g., to save/restore
49 // additional registers when doing a VM call).
50 virtual void call_VM_leaf_base(
51 address entry_point, // the entry point
52 int number_of_arguments, // the number of arguments to pop after the call
53 Label *retaddr = NULL
54 );
55
56 virtual void call_VM_leaf_base(
57 address entry_point, // the entry point
58 int number_of_arguments, // the number of arguments to pop after the call
59 Label &retaddr) {
60 call_VM_leaf_base(entry_point, number_of_arguments, &retaddr);
61 }
62
63 // This is the base routine called by the different versions of call_VM. The interpreter
64 // may customize this version by overriding it for its purposes (e.g., to save/restore
65 // additional registers when doing a VM call).
66 //
67 // If no java_thread register is specified (noreg) than rthread will be used instead. call_VM_base
68 // returns the register which contains the thread upon return. If a thread register has been
69 // specified, the return value will correspond to that register. If no last_java_sp is specified
70 // (noreg) than rsp will be used instead.
71 virtual void call_VM_base( // returns the register containing the thread upon return
72 Register oop_result, // where an oop-result ends up if any; use noreg otherwise
73 Register java_thread, // the thread if computed before ; use noreg otherwise
74 Register last_java_sp, // to set up last_Java_frame in stubs; use noreg otherwise
75 address entry_point, // the entry point
76 int number_of_arguments, // the number of arguments (w/o thread) to pop after the call
77 bool check_exceptions // whether to check for pending exceptions after return
78 );
79
80 void call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions = true);
81
82 // True if an XOR can be used to expand narrow klass references.
83 bool use_XOR_for_compressed_class_base;
84
85 public:
86 MacroAssembler(CodeBuffer* code) : Assembler(code) {
87 use_XOR_for_compressed_class_base
88 = (operand_valid_for_logical_immediate(false /*is32*/,
89 (uint64_t)Universe::narrow_klass_base())
90 && ((uint64_t)Universe::narrow_klass_base()
91 > (1UL << log2_intptr(Universe::narrow_klass_range()))));
92 }
93
94 // These routines should emit JVMTI PopFrame and ForceEarlyReturn handling code.
95 // The implementation is only non-empty for the InterpreterMacroAssembler,
96 // as only the interpreter handles PopFrame and ForceEarlyReturn requests.
97 virtual void check_and_handle_popframe(Register java_thread);
98 virtual void check_and_handle_earlyret(Register java_thread);
99
100 void safepoint_poll(Label& slow_path);
101 void safepoint_poll_acquire(Label& slow_path);
102
103 // Biased locking support
104 // lock_reg and obj_reg must be loaded up with the appropriate values.
105 // swap_reg is killed.
106 // tmp_reg must be supplied and must not be rscratch1 or rscratch2
107 // Optional slow case is for implementations (interpreter and C1) which branch to
108 // slow case directly. Leaves condition codes set for C2's Fast_Lock node.
109 // Returns offset of first potentially-faulting instruction for null
110 // check info (currently consumed only by C1). If
111 // swap_reg_contains_mark is true then returns -1 as it is assumed
112 // the calling code has already passed any potential faults.
113 int biased_locking_enter(Register lock_reg, Register obj_reg,
114 Register swap_reg, Register tmp_reg,
115 bool swap_reg_contains_mark,
116 Label& done, Label* slow_case = NULL,
117 BiasedLockingCounters* counters = NULL);
118 void biased_locking_exit (Register obj_reg, Register temp_reg, Label& done);
119
120
121 // Helper functions for statistics gathering.
122 // Unconditional atomic increment.
123 void atomic_incw(Register counter_addr, Register tmp, Register tmp2);
124 void atomic_incw(Address counter_addr, Register tmp1, Register tmp2, Register tmp3) {
125 lea(tmp1, counter_addr);
126 atomic_incw(tmp1, tmp2, tmp3);
127 }
128 // Load Effective Address
129 void lea(Register r, const Address &a) {
130 InstructionMark im(this);
131 code_section()->relocate(inst_mark(), a.rspec());
132 a.lea(this, r);
133 }
134
135 void addmw(Address a, Register incr, Register scratch) {
136 ldrw(scratch, a);
137 addw(scratch, scratch, incr);
138 strw(scratch, a);
139 }
140
141 // Add constant to memory word
142 void addmw(Address a, int imm, Register scratch) {
143 ldrw(scratch, a);
144 if (imm > 0)
145 addw(scratch, scratch, (unsigned)imm);
146 else
147 subw(scratch, scratch, (unsigned)-imm);
148 strw(scratch, a);
149 }
150
151 void bind(Label& L) {
152 Assembler::bind(L);
153 code()->clear_last_insn();
154 }
155
156 void membar(Membar_mask_bits order_constraint);
157
158 using Assembler::ldr;
159 using Assembler::str;
160
161 void ldr(Register Rx, const Address &adr);
162 void ldrw(Register Rw, const Address &adr);
163 void str(Register Rx, const Address &adr);
164 void strw(Register Rx, const Address &adr);
165
166 // Frame creation and destruction shared between JITs.
167 void build_frame(int framesize);
168 void remove_frame(int framesize);
169
170 virtual void _call_Unimplemented(address call_site) {
171 mov(rscratch2, call_site);
172 haltsim();
173 }
174
175 #define call_Unimplemented() _call_Unimplemented((address)__PRETTY_FUNCTION__)
176
177 virtual void notify(int type);
178
179 // aliases defined in AARCH64 spec
180
181 template<class T>
182 inline void cmpw(Register Rd, T imm) { subsw(zr, Rd, imm); }
183 // imm is limited to 12 bits.
184 inline void cmp(Register Rd, unsigned imm) { subs(zr, Rd, imm); }
185
186 inline void cmnw(Register Rd, unsigned imm) { addsw(zr, Rd, imm); }
187 inline void cmn(Register Rd, unsigned imm) { adds(zr, Rd, imm); }
188
189 void cset(Register Rd, Assembler::Condition cond) {
190 csinc(Rd, zr, zr, ~cond);
191 }
192 void csetw(Register Rd, Assembler::Condition cond) {
193 csincw(Rd, zr, zr, ~cond);
194 }
195
196 void cneg(Register Rd, Register Rn, Assembler::Condition cond) {
197 csneg(Rd, Rn, Rn, ~cond);
198 }
199 void cnegw(Register Rd, Register Rn, Assembler::Condition cond) {
200 csnegw(Rd, Rn, Rn, ~cond);
201 }
202
203 inline void movw(Register Rd, Register Rn) {
204 if (Rd == sp || Rn == sp) {
205 addw(Rd, Rn, 0U);
206 } else {
207 orrw(Rd, zr, Rn);
208 }
209 }
210 inline void mov(Register Rd, Register Rn) {
211 assert(Rd != r31_sp && Rn != r31_sp, "should be");
212 if (Rd == Rn) {
213 } else if (Rd == sp || Rn == sp) {
214 add(Rd, Rn, 0U);
215 } else {
216 orr(Rd, zr, Rn);
217 }
218 }
219
220 inline void moviw(Register Rd, unsigned imm) { orrw(Rd, zr, imm); }
221 inline void movi(Register Rd, unsigned imm) { orr(Rd, zr, imm); }
222
223 inline void tstw(Register Rd, Register Rn) { andsw(zr, Rd, Rn); }
224 inline void tst(Register Rd, Register Rn) { ands(zr, Rd, Rn); }
225
226 inline void tstw(Register Rd, uint64_t imm) { andsw(zr, Rd, imm); }
227 inline void tst(Register Rd, uint64_t imm) { ands(zr, Rd, imm); }
228
229 inline void bfiw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
230 bfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1));
231 }
232 inline void bfi(Register Rd, Register Rn, unsigned lsb, unsigned width) {
233 bfm(Rd, Rn, ((64 - lsb) & 63), (width - 1));
234 }
235
236 inline void bfxilw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
237 bfmw(Rd, Rn, lsb, (lsb + width - 1));
238 }
239 inline void bfxil(Register Rd, Register Rn, unsigned lsb, unsigned width) {
240 bfm(Rd, Rn, lsb , (lsb + width - 1));
241 }
242
243 inline void sbfizw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
244 sbfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1));
245 }
246 inline void sbfiz(Register Rd, Register Rn, unsigned lsb, unsigned width) {
247 sbfm(Rd, Rn, ((64 - lsb) & 63), (width - 1));
248 }
249
250 inline void sbfxw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
251 sbfmw(Rd, Rn, lsb, (lsb + width - 1));
252 }
253 inline void sbfx(Register Rd, Register Rn, unsigned lsb, unsigned width) {
254 sbfm(Rd, Rn, lsb , (lsb + width - 1));
255 }
256
257 inline void ubfizw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
258 ubfmw(Rd, Rn, ((32 - lsb) & 31), (width - 1));
259 }
260 inline void ubfiz(Register Rd, Register Rn, unsigned lsb, unsigned width) {
261 ubfm(Rd, Rn, ((64 - lsb) & 63), (width - 1));
262 }
263
264 inline void ubfxw(Register Rd, Register Rn, unsigned lsb, unsigned width) {
265 ubfmw(Rd, Rn, lsb, (lsb + width - 1));
266 }
267 inline void ubfx(Register Rd, Register Rn, unsigned lsb, unsigned width) {
268 ubfm(Rd, Rn, lsb , (lsb + width - 1));
269 }
270
271 inline void asrw(Register Rd, Register Rn, unsigned imm) {
272 sbfmw(Rd, Rn, imm, 31);
273 }
274
275 inline void asr(Register Rd, Register Rn, unsigned imm) {
276 sbfm(Rd, Rn, imm, 63);
277 }
278
279 inline void lslw(Register Rd, Register Rn, unsigned imm) {
280 ubfmw(Rd, Rn, ((32 - imm) & 31), (31 - imm));
281 }
282
283 inline void lsl(Register Rd, Register Rn, unsigned imm) {
284 ubfm(Rd, Rn, ((64 - imm) & 63), (63 - imm));
285 }
286
287 inline void lsrw(Register Rd, Register Rn, unsigned imm) {
288 ubfmw(Rd, Rn, imm, 31);
289 }
290
291 inline void lsr(Register Rd, Register Rn, unsigned imm) {
292 ubfm(Rd, Rn, imm, 63);
293 }
294
295 inline void rorw(Register Rd, Register Rn, unsigned imm) {
296 extrw(Rd, Rn, Rn, imm);
297 }
298
299 inline void ror(Register Rd, Register Rn, unsigned imm) {
300 extr(Rd, Rn, Rn, imm);
301 }
302
303 inline void sxtbw(Register Rd, Register Rn) {
304 sbfmw(Rd, Rn, 0, 7);
305 }
306 inline void sxthw(Register Rd, Register Rn) {
307 sbfmw(Rd, Rn, 0, 15);
308 }
309 inline void sxtb(Register Rd, Register Rn) {
310 sbfm(Rd, Rn, 0, 7);
311 }
312 inline void sxth(Register Rd, Register Rn) {
313 sbfm(Rd, Rn, 0, 15);
314 }
315 inline void sxtw(Register Rd, Register Rn) {
316 sbfm(Rd, Rn, 0, 31);
317 }
318
319 inline void uxtbw(Register Rd, Register Rn) {
320 ubfmw(Rd, Rn, 0, 7);
321 }
322 inline void uxthw(Register Rd, Register Rn) {
323 ubfmw(Rd, Rn, 0, 15);
324 }
325 inline void uxtb(Register Rd, Register Rn) {
326 ubfm(Rd, Rn, 0, 7);
327 }
328 inline void uxth(Register Rd, Register Rn) {
329 ubfm(Rd, Rn, 0, 15);
330 }
331 inline void uxtw(Register Rd, Register Rn) {
332 ubfm(Rd, Rn, 0, 31);
333 }
334
335 inline void cmnw(Register Rn, Register Rm) {
336 addsw(zr, Rn, Rm);
337 }
338 inline void cmn(Register Rn, Register Rm) {
339 adds(zr, Rn, Rm);
340 }
341
342 inline void cmpw(Register Rn, Register Rm) {
343 subsw(zr, Rn, Rm);
344 }
345 inline void cmp(Register Rn, Register Rm) {
346 subs(zr, Rn, Rm);
347 }
348
349 inline void negw(Register Rd, Register Rn) {
350 subw(Rd, zr, Rn);
351 }
352
353 inline void neg(Register Rd, Register Rn) {
354 sub(Rd, zr, Rn);
355 }
356
357 inline void negsw(Register Rd, Register Rn) {
358 subsw(Rd, zr, Rn);
359 }
360
361 inline void negs(Register Rd, Register Rn) {
362 subs(Rd, zr, Rn);
363 }
364
365 inline void cmnw(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) {
366 addsw(zr, Rn, Rm, kind, shift);
367 }
368 inline void cmn(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) {
369 adds(zr, Rn, Rm, kind, shift);
370 }
371
372 inline void cmpw(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) {
373 subsw(zr, Rn, Rm, kind, shift);
374 }
375 inline void cmp(Register Rn, Register Rm, enum shift_kind kind, unsigned shift = 0) {
376 subs(zr, Rn, Rm, kind, shift);
377 }
378
379 inline void negw(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) {
380 subw(Rd, zr, Rn, kind, shift);
381 }
382
383 inline void neg(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) {
384 sub(Rd, zr, Rn, kind, shift);
385 }
386
387 inline void negsw(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) {
388 subsw(Rd, zr, Rn, kind, shift);
389 }
390
391 inline void negs(Register Rd, Register Rn, enum shift_kind kind, unsigned shift = 0) {
392 subs(Rd, zr, Rn, kind, shift);
393 }
394
395 inline void mnegw(Register Rd, Register Rn, Register Rm) {
396 msubw(Rd, Rn, Rm, zr);
397 }
398 inline void mneg(Register Rd, Register Rn, Register Rm) {
399 msub(Rd, Rn, Rm, zr);
400 }
401
402 inline void mulw(Register Rd, Register Rn, Register Rm) {
403 maddw(Rd, Rn, Rm, zr);
404 }
405 inline void mul(Register Rd, Register Rn, Register Rm) {
406 madd(Rd, Rn, Rm, zr);
407 }
408
409 inline void smnegl(Register Rd, Register Rn, Register Rm) {
410 smsubl(Rd, Rn, Rm, zr);
411 }
412 inline void smull(Register Rd, Register Rn, Register Rm) {
413 smaddl(Rd, Rn, Rm, zr);
414 }
415
416 inline void umnegl(Register Rd, Register Rn, Register Rm) {
417 umsubl(Rd, Rn, Rm, zr);
418 }
419 inline void umull(Register Rd, Register Rn, Register Rm) {
420 umaddl(Rd, Rn, Rm, zr);
421 }
422
423 #define WRAP(INSN) \
424 void INSN(Register Rd, Register Rn, Register Rm, Register Ra) { \
425 if ((VM_Version::features() & VM_Version::CPU_A53MAC) && Ra != zr) \
426 nop(); \
427 Assembler::INSN(Rd, Rn, Rm, Ra); \
428 }
429
430 WRAP(madd) WRAP(msub) WRAP(maddw) WRAP(msubw)
431 WRAP(smaddl) WRAP(smsubl) WRAP(umaddl) WRAP(umsubl)
432 #undef WRAP
433
434
435 // macro assembly operations needed for aarch64
436
437 // first two private routines for loading 32 bit or 64 bit constants
438 private:
439
440 void mov_immediate64(Register dst, u_int64_t imm64);
441 void mov_immediate32(Register dst, u_int32_t imm32);
442
443 int push(unsigned int bitset, Register stack);
444 int pop(unsigned int bitset, Register stack);
445
446 void mov(Register dst, Address a);
447
448 public:
449 void push(RegSet regs, Register stack) { if (regs.bits()) push(regs.bits(), stack); }
450 void pop(RegSet regs, Register stack) { if (regs.bits()) pop(regs.bits(), stack); }
451
452 // Push and pop everything that might be clobbered by a native
453 // runtime call except rscratch1 and rscratch2. (They are always
454 // scratch, so we don't have to protect them.) Only save the lower
455 // 64 bits of each vector register.
456 void push_call_clobbered_registers();
457 void pop_call_clobbered_registers();
458
459 // now mov instructions for loading absolute addresses and 32 or
460 // 64 bit integers
461
462 inline void mov(Register dst, address addr)
463 {
464 mov_immediate64(dst, (u_int64_t)addr);
465 }
466
467 inline void mov(Register dst, u_int64_t imm64)
468 {
469 mov_immediate64(dst, imm64);
470 }
471
472 inline void movw(Register dst, u_int32_t imm32)
473 {
474 mov_immediate32(dst, imm32);
475 }
476
477 inline void mov(Register dst, long l)
478 {
479 mov(dst, (u_int64_t)l);
480 }
481
482 inline void mov(Register dst, int i)
483 {
484 mov(dst, (long)i);
485 }
486
487 void mov(Register dst, RegisterOrConstant src) {
488 if (src.is_register())
489 mov(dst, src.as_register());
490 else
491 mov(dst, src.as_constant());
492 }
493
494 void movptr(Register r, uintptr_t imm64);
495
496 void mov(FloatRegister Vd, SIMD_Arrangement T, u_int32_t imm32);
497
498 void mov(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn) {
499 orr(Vd, T, Vn, Vn);
500 }
501
502 public:
503
504 // Generalized Test Bit And Branch, including a "far" variety which
505 // spans more than 32KiB.
506 void tbr(Condition cond, Register Rt, int bitpos, Label &dest, bool far = false) {
507 assert(cond == EQ || cond == NE, "must be");
508
509 if (far)
510 cond = ~cond;
511
512 void (Assembler::* branch)(Register Rt, int bitpos, Label &L);
513 if (cond == Assembler::EQ)
514 branch = &Assembler::tbz;
515 else
516 branch = &Assembler::tbnz;
517
518 if (far) {
519 Label L;
520 (this->*branch)(Rt, bitpos, L);
521 b(dest);
522 bind(L);
523 } else {
524 (this->*branch)(Rt, bitpos, dest);
525 }
526 }
527
528 // macro instructions for accessing and updating floating point
529 // status register
530 //
531 // FPSR : op1 == 011
532 // CRn == 0100
533 // CRm == 0100
534 // op2 == 001
535
536 inline void get_fpsr(Register reg)
537 {
538 mrs(0b11, 0b0100, 0b0100, 0b001, reg);
539 }
540
541 inline void set_fpsr(Register reg)
542 {
543 msr(0b011, 0b0100, 0b0100, 0b001, reg);
544 }
545
546 inline void clear_fpsr()
547 {
548 msr(0b011, 0b0100, 0b0100, 0b001, zr);
549 }
550
551 // DCZID_EL0: op1 == 011
552 // CRn == 0000
553 // CRm == 0000
554 // op2 == 111
555 inline void get_dczid_el0(Register reg)
556 {
557 mrs(0b011, 0b0000, 0b0000, 0b111, reg);
558 }
559
560 // CTR_EL0: op1 == 011
561 // CRn == 0000
562 // CRm == 0000
563 // op2 == 001
564 inline void get_ctr_el0(Register reg)
565 {
566 mrs(0b011, 0b0000, 0b0000, 0b001, reg);
567 }
568
569 // idiv variant which deals with MINLONG as dividend and -1 as divisor
570 int corrected_idivl(Register result, Register ra, Register rb,
571 bool want_remainder, Register tmp = rscratch1);
572 int corrected_idivq(Register result, Register ra, Register rb,
573 bool want_remainder, Register tmp = rscratch1);
574
575 // Support for NULL-checks
576 //
577 // Generates code that causes a NULL OS exception if the content of reg is NULL.
578 // If the accessed location is M[reg + offset] and the offset is known, provide the
579 // offset. No explicit code generation is needed if the offset is within a certain
580 // range (0 <= offset <= page_size).
581
582 virtual void null_check(Register reg, int offset = -1);
583 static bool needs_explicit_null_check(intptr_t offset);
584
585 static address target_addr_for_insn(address insn_addr, unsigned insn);
586 static address target_addr_for_insn(address insn_addr) {
587 unsigned insn = *(unsigned*)insn_addr;
588 return target_addr_for_insn(insn_addr, insn);
589 }
590
591 // Required platform-specific helpers for Label::patch_instructions.
592 // They _shadow_ the declarations in AbstractAssembler, which are undefined.
593 static int pd_patch_instruction_size(address branch, address target);
594 static void pd_patch_instruction(address branch, address target) {
595 pd_patch_instruction_size(branch, target);
596 }
597 static address pd_call_destination(address branch) {
598 return target_addr_for_insn(branch);
599 }
600 #ifndef PRODUCT
601 static void pd_print_patched_instruction(address branch);
602 #endif
603
604 static int patch_oop(address insn_addr, address o);
605 static int patch_narrow_klass(address insn_addr, narrowKlass n);
606
607 address emit_trampoline_stub(int insts_call_instruction_offset, address target);
608
609 // The following 4 methods return the offset of the appropriate move instruction
610
611 // Support for fast byte/short loading with zero extension (depending on particular CPU)
612 int load_unsigned_byte(Register dst, Address src);
613 int load_unsigned_short(Register dst, Address src);
614
615 // Support for fast byte/short loading with sign extension (depending on particular CPU)
616 int load_signed_byte(Register dst, Address src);
617 int load_signed_short(Register dst, Address src);
618
619 int load_signed_byte32(Register dst, Address src);
620 int load_signed_short32(Register dst, Address src);
621
622 // Support for sign-extension (hi:lo = extend_sign(lo))
623 void extend_sign(Register hi, Register lo);
624
625 // Load and store values by size and signed-ness
626 void load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2 = noreg);
627 void store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2 = noreg);
628
629 // Support for inc/dec with optimal instruction selection depending on value
630
631 // x86_64 aliases an unqualified register/address increment and
632 // decrement to call incrementq and decrementq but also supports
633 // explicitly sized calls to incrementq/decrementq or
634 // incrementl/decrementl
635
636 // for aarch64 the proper convention would be to use
637 // increment/decrement for 64 bit operatons and
638 // incrementw/decrementw for 32 bit operations. so when porting
639 // x86_64 code we can leave calls to increment/decrement as is,
640 // replace incrementq/decrementq with increment/decrement and
641 // replace incrementl/decrementl with incrementw/decrementw.
642
643 // n.b. increment/decrement calls with an Address destination will
644 // need to use a scratch register to load the value to be
645 // incremented. increment/decrement calls which add or subtract a
646 // constant value greater than 2^12 will need to use a 2nd scratch
647 // register to hold the constant. so, a register increment/decrement
648 // may trash rscratch2 and an address increment/decrement trash
649 // rscratch and rscratch2
650
651 void decrementw(Address dst, int value = 1);
652 void decrementw(Register reg, int value = 1);
653
654 void decrement(Register reg, int value = 1);
655 void decrement(Address dst, int value = 1);
656
657 void incrementw(Address dst, int value = 1);
658 void incrementw(Register reg, int value = 1);
659
660 void increment(Register reg, int value = 1);
661 void increment(Address dst, int value = 1);
662
663
664 // Alignment
665 void align(int modulus);
666
667 // Stack frame creation/removal
668 void enter()
669 {
670 stp(rfp, lr, Address(pre(sp, -2 * wordSize)));
671 mov(rfp, sp);
672 }
673 void leave()
674 {
675 mov(sp, rfp);
676 ldp(rfp, lr, Address(post(sp, 2 * wordSize)));
677 }
678
679 // Support for getting the JavaThread pointer (i.e.; a reference to thread-local information)
680 // The pointer will be loaded into the thread register.
681 void get_thread(Register thread);
682
683
684 // Support for VM calls
685 //
686 // It is imperative that all calls into the VM are handled via the call_VM macros.
687 // They make sure that the stack linkage is setup correctly. call_VM's correspond
688 // to ENTRY/ENTRY_X entry points while call_VM_leaf's correspond to LEAF entry points.
689
690
691 void call_VM(Register oop_result,
692 address entry_point,
693 bool check_exceptions = true);
694 void call_VM(Register oop_result,
695 address entry_point,
696 Register arg_1,
697 bool check_exceptions = true);
698 void call_VM(Register oop_result,
699 address entry_point,
700 Register arg_1, Register arg_2,
701 bool check_exceptions = true);
702 void call_VM(Register oop_result,
703 address entry_point,
704 Register arg_1, Register arg_2, Register arg_3,
705 bool check_exceptions = true);
706
707 // Overloadings with last_Java_sp
708 void call_VM(Register oop_result,
709 Register last_java_sp,
710 address entry_point,
711 int number_of_arguments = 0,
712 bool check_exceptions = true);
713 void call_VM(Register oop_result,
714 Register last_java_sp,
715 address entry_point,
716 Register arg_1, bool
717 check_exceptions = true);
718 void call_VM(Register oop_result,
719 Register last_java_sp,
720 address entry_point,
721 Register arg_1, Register arg_2,
722 bool check_exceptions = true);
723 void call_VM(Register oop_result,
724 Register last_java_sp,
725 address entry_point,
726 Register arg_1, Register arg_2, Register arg_3,
727 bool check_exceptions = true);
728
729 void get_vm_result (Register oop_result, Register thread);
730 void get_vm_result_2(Register metadata_result, Register thread);
731
732 // These always tightly bind to MacroAssembler::call_VM_base
733 // bypassing the virtual implementation
734 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments = 0, bool check_exceptions = true);
735 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions = true);
736 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions = true);
737 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions = true);
738 void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4, bool check_exceptions = true);
739
740 void call_VM_leaf(address entry_point,
741 int number_of_arguments = 0);
742 void call_VM_leaf(address entry_point,
743 Register arg_1);
744 void call_VM_leaf(address entry_point,
745 Register arg_1, Register arg_2);
746 void call_VM_leaf(address entry_point,
747 Register arg_1, Register arg_2, Register arg_3);
748
749 // These always tightly bind to MacroAssembler::call_VM_leaf_base
750 // bypassing the virtual implementation
751 void super_call_VM_leaf(address entry_point);
752 void super_call_VM_leaf(address entry_point, Register arg_1);
753 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
754 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3);
755 void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4);
756
757 // last Java Frame (fills frame anchor)
758 void set_last_Java_frame(Register last_java_sp,
759 Register last_java_fp,
760 address last_java_pc,
761 Register scratch);
762
763 void set_last_Java_frame(Register last_java_sp,
764 Register last_java_fp,
765 Label &last_java_pc,
766 Register scratch);
767
768 void set_last_Java_frame(Register last_java_sp,
769 Register last_java_fp,
770 Register last_java_pc,
771 Register scratch);
772
773 void reset_last_Java_frame(Register thread);
774
775 // thread in the default location (rthread)
776 void reset_last_Java_frame(bool clear_fp);
777
778 // Stores
779 void store_check(Register obj); // store check for obj - register is destroyed afterwards
780 void store_check(Register obj, Address dst); // same as above, dst is exact store location (reg. is destroyed)
781
782 void resolve_jobject(Register value, Register thread, Register tmp);
783
784 // oop manipulations
785 void load_klass(Register dst, Register src);
786 void store_klass(Register dst, Register src);
787 void cmp_klass(Register oop, Register trial_klass, Register tmp);
788
789 void resolve_oop_handle(Register result, Register tmp = r5);
790 void load_mirror(Register dst, Register method, Register tmp = r5);
791
792 void access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
793 Register tmp1, Register tmp_thread);
794
795 void access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register src,
796 Register tmp1, Register tmp_thread);
797
798 // Resolves obj for access. Result is placed in the same register.
799 // All other registers are preserved.
800 void resolve(DecoratorSet decorators, Register obj);
801
802 void load_heap_oop(Register dst, Address src, Register tmp1 = noreg,
803 Register thread_tmp = noreg, DecoratorSet decorators = 0);
804
805 void load_heap_oop_not_null(Register dst, Address src, Register tmp1 = noreg,
806 Register thread_tmp = noreg, DecoratorSet decorators = 0);
807 void store_heap_oop(Address dst, Register src, Register tmp1 = noreg,
808 Register tmp_thread = noreg, DecoratorSet decorators = 0);
809
810 // currently unimplemented
811 // Used for storing NULL. All other oop constants should be
812 // stored using routines that take a jobject.
813 void store_heap_oop_null(Address dst);
814
815 void load_prototype_header(Register dst, Register src);
816
817 void store_klass_gap(Register dst, Register src);
818
819 // This dummy is to prevent a call to store_heap_oop from
820 // converting a zero (like NULL) into a Register by giving
821 // the compiler two choices it can't resolve
822
823 void store_heap_oop(Address dst, void* dummy);
824
825 void encode_heap_oop(Register d, Register s);
826 void encode_heap_oop(Register r) { encode_heap_oop(r, r); }
827 void decode_heap_oop(Register d, Register s);
828 void decode_heap_oop(Register r) { decode_heap_oop(r, r); }
829 void encode_heap_oop_not_null(Register r);
830 void decode_heap_oop_not_null(Register r);
831 void encode_heap_oop_not_null(Register dst, Register src);
832 void decode_heap_oop_not_null(Register dst, Register src);
833
834 void set_narrow_oop(Register dst, jobject obj);
835
836 void encode_klass_not_null(Register r);
837 void decode_klass_not_null(Register r);
838 void encode_klass_not_null(Register dst, Register src);
839 void decode_klass_not_null(Register dst, Register src);
840
841 void set_narrow_klass(Register dst, Klass* k);
842
843 // if heap base register is used - reinit it with the correct value
844 void reinit_heapbase();
845
846 DEBUG_ONLY(void verify_heapbase(const char* msg);)
847
848 void push_CPU_state(bool save_vectors = false);
849 void pop_CPU_state(bool restore_vectors = false) ;
850
851 // Round up to a power of two
852 void round_to(Register reg, int modulus);
853
854 // allocation
855 void eden_allocate(
856 Register obj, // result: pointer to object after successful allocation
857 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
858 int con_size_in_bytes, // object size in bytes if known at compile time
859 Register t1, // temp register
860 Label& slow_case // continuation point if fast allocation fails
861 );
862 void tlab_allocate(
863 Register obj, // result: pointer to object after successful allocation
864 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
865 int con_size_in_bytes, // object size in bytes if known at compile time
866 Register t1, // temp register
867 Register t2, // temp register
868 Label& slow_case // continuation point if fast allocation fails
869 );
870 void zero_memory(Register addr, Register len, Register t1);
871 void verify_tlab();
872
873 // interface method calling
874 void lookup_interface_method(Register recv_klass,
875 Register intf_klass,
876 RegisterOrConstant itable_index,
877 Register method_result,
878 Register scan_temp,
879 Label& no_such_interface,
880 bool return_method = true);
881
882 // virtual method calling
883 // n.b. x86 allows RegisterOrConstant for vtable_index
884 void lookup_virtual_method(Register recv_klass,
885 RegisterOrConstant vtable_index,
886 Register method_result);
887
888 // Test sub_klass against super_klass, with fast and slow paths.
889
890 // The fast path produces a tri-state answer: yes / no / maybe-slow.
891 // One of the three labels can be NULL, meaning take the fall-through.
892 // If super_check_offset is -1, the value is loaded up from super_klass.
893 // No registers are killed, except temp_reg.
894 void check_klass_subtype_fast_path(Register sub_klass,
895 Register super_klass,
896 Register temp_reg,
897 Label* L_success,
898 Label* L_failure,
899 Label* L_slow_path,
900 RegisterOrConstant super_check_offset = RegisterOrConstant(-1));
901
902 // The rest of the type check; must be wired to a corresponding fast path.
903 // It does not repeat the fast path logic, so don't use it standalone.
904 // The temp_reg and temp2_reg can be noreg, if no temps are available.
905 // Updates the sub's secondary super cache as necessary.
906 // If set_cond_codes, condition codes will be Z on success, NZ on failure.
907 void check_klass_subtype_slow_path(Register sub_klass,
908 Register super_klass,
909 Register temp_reg,
910 Register temp2_reg,
911 Label* L_success,
912 Label* L_failure,
913 bool set_cond_codes = false);
914
915 // Simplified, combined version, good for typical uses.
916 // Falls through on failure.
917 void check_klass_subtype(Register sub_klass,
918 Register super_klass,
919 Register temp_reg,
920 Label& L_success);
921
922 Address argument_address(RegisterOrConstant arg_slot, int extra_slot_offset = 0);
923
924
925 // Debugging
926
927 // only if +VerifyOops
928 void verify_oop(Register reg, const char* s = "broken oop");
929 void verify_oop_addr(Address addr, const char * s = "broken oop addr");
930
931 // TODO: verify method and klass metadata (compare against vptr?)
932 void _verify_method_ptr(Register reg, const char * msg, const char * file, int line) {}
933 void _verify_klass_ptr(Register reg, const char * msg, const char * file, int line){}
934
935 #define verify_method_ptr(reg) _verify_method_ptr(reg, "broken method " #reg, __FILE__, __LINE__)
936 #define verify_klass_ptr(reg) _verify_klass_ptr(reg, "broken klass " #reg, __FILE__, __LINE__)
937
938 // only if +VerifyFPU
939 void verify_FPU(int stack_depth, const char* s = "illegal FPU state");
940
941 // prints msg, dumps registers and stops execution
942 void stop(const char* msg);
943
944 // prints msg and continues
945 void warn(const char* msg);
946
947 static void debug64(char* msg, int64_t pc, int64_t regs[]);
948
949 void untested() { stop("untested"); }
950
951 void unimplemented(const char* what = "");
952
953 void should_not_reach_here() { stop("should not reach here"); }
954
955 // Stack overflow checking
956 void bang_stack_with_offset(int offset) {
957 // stack grows down, caller passes positive offset
958 assert(offset > 0, "must bang with negative offset");
959 sub(rscratch2, sp, offset);
960 str(zr, Address(rscratch2));
961 }
962
963 // Writes to stack successive pages until offset reached to check for
964 // stack overflow + shadow pages. Also, clobbers tmp
965 void bang_stack_size(Register size, Register tmp);
966
967 // Check for reserved stack access in method being exited (for JIT)
968 void reserved_stack_check();
969
970 virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr,
971 Register tmp,
972 int offset);
973
974 // Support for serializing memory accesses between threads
975 void serialize_memory(Register thread, Register tmp);
976
977 // Arithmetics
978
979 void addptr(const Address &dst, int32_t src);
980 void cmpptr(Register src1, Address src2);
981
982 void cmpoop(Register obj1, Register obj2);
983
984 // Various forms of CAS
985
986 void cmpxchg_obj_header(Register oldv, Register newv, Register obj, Register tmp,
987 Label &suceed, Label *fail);
988 void cmpxchgptr(Register oldv, Register newv, Register addr, Register tmp,
989 Label &suceed, Label *fail);
990
991 void cmpxchgw(Register oldv, Register newv, Register addr, Register tmp,
992 Label &suceed, Label *fail);
993
994 void atomic_add(Register prev, RegisterOrConstant incr, Register addr);
995 void atomic_addw(Register prev, RegisterOrConstant incr, Register addr);
996 void atomic_addal(Register prev, RegisterOrConstant incr, Register addr);
997 void atomic_addalw(Register prev, RegisterOrConstant incr, Register addr);
998
999 void atomic_xchg(Register prev, Register newv, Register addr);
1000 void atomic_xchgw(Register prev, Register newv, Register addr);
1001 void atomic_xchgal(Register prev, Register newv, Register addr);
1002 void atomic_xchgalw(Register prev, Register newv, Register addr);
1003
1004 void orptr(Address adr, RegisterOrConstant src) {
1005 ldr(rscratch1, adr);
1006 if (src.is_register())
1007 orr(rscratch1, rscratch1, src.as_register());
1008 else
1009 orr(rscratch1, rscratch1, src.as_constant());
1010 str(rscratch1, adr);
1011 }
1012
1013 // A generic CAS; success or failure is in the EQ flag.
1014 // Clobbers rscratch1
1015 void cmpxchg(Register addr, Register expected, Register new_val,
1016 enum operand_size size,
1017 bool acquire, bool release, bool weak,
1018 Register result);
1019
1020 // Calls
1021
1022 address trampoline_call(Address entry, CodeBuffer *cbuf = NULL);
1023
1024 static bool far_branches() {
1025 return ReservedCodeCacheSize > branch_range || UseAOT;
1026 }
1027
1028 // Jumps that can reach anywhere in the code cache.
1029 // Trashes tmp.
1030 void far_call(Address entry, CodeBuffer *cbuf = NULL, Register tmp = rscratch1);
1031 void far_jump(Address entry, CodeBuffer *cbuf = NULL, Register tmp = rscratch1);
1032
1033 static int far_branch_size() {
1034 if (far_branches()) {
1035 return 3 * 4; // adrp, add, br
1036 } else {
1037 return 4;
1038 }
1039 }
1040
1041 // Emit the CompiledIC call idiom
1042 address ic_call(address entry, jint method_index = 0);
1043
1044 public:
1045
1046 // Data
1047
1048 void mov_metadata(Register dst, Metadata* obj);
1049 Address allocate_metadata_address(Metadata* obj);
1050 Address constant_oop_address(jobject obj);
1051
1052 void movoop(Register dst, jobject obj, bool immediate = false);
1053
1054 // CRC32 code for java.util.zip.CRC32::updateBytes() instrinsic.
1055 void kernel_crc32(Register crc, Register buf, Register len,
1056 Register table0, Register table1, Register table2, Register table3,
1057 Register tmp, Register tmp2, Register tmp3);
1058 // CRC32 code for java.util.zip.CRC32C::updateBytes() instrinsic.
1059 void kernel_crc32c(Register crc, Register buf, Register len,
1060 Register table0, Register table1, Register table2, Register table3,
1061 Register tmp, Register tmp2, Register tmp3);
1062
1063 // Stack push and pop individual 64 bit registers
1064 void push(Register src);
1065 void pop(Register dst);
1066
1067 // push all registers onto the stack
1068 void pusha();
1069 void popa();
1070
1071 void repne_scan(Register addr, Register value, Register count,
1072 Register scratch);
1073 void repne_scanw(Register addr, Register value, Register count,
1074 Register scratch);
1075
1076 typedef void (MacroAssembler::* add_sub_imm_insn)(Register Rd, Register Rn, unsigned imm);
1077 typedef void (MacroAssembler::* add_sub_reg_insn)(Register Rd, Register Rn, Register Rm, enum shift_kind kind, unsigned shift);
1078
1079 // If a constant does not fit in an immediate field, generate some
1080 // number of MOV instructions and then perform the operation
1081 void wrap_add_sub_imm_insn(Register Rd, Register Rn, unsigned imm,
1082 add_sub_imm_insn insn1,
1083 add_sub_reg_insn insn2);
1084 // Seperate vsn which sets the flags
1085 void wrap_adds_subs_imm_insn(Register Rd, Register Rn, unsigned imm,
1086 add_sub_imm_insn insn1,
1087 add_sub_reg_insn insn2);
1088
1089 #define WRAP(INSN) \
1090 void INSN(Register Rd, Register Rn, unsigned imm) { \
1091 wrap_add_sub_imm_insn(Rd, Rn, imm, &Assembler::INSN, &Assembler::INSN); \
1092 } \
1093 \
1094 void INSN(Register Rd, Register Rn, Register Rm, \
1095 enum shift_kind kind, unsigned shift = 0) { \
1096 Assembler::INSN(Rd, Rn, Rm, kind, shift); \
1097 } \
1098 \
1099 void INSN(Register Rd, Register Rn, Register Rm) { \
1100 Assembler::INSN(Rd, Rn, Rm); \
1101 } \
1102 \
1103 void INSN(Register Rd, Register Rn, Register Rm, \
1104 ext::operation option, int amount = 0) { \
1105 Assembler::INSN(Rd, Rn, Rm, option, amount); \
1106 }
1107
1108 WRAP(add) WRAP(addw) WRAP(sub) WRAP(subw)
1109
1110 #undef WRAP
1111 #define WRAP(INSN) \
1112 void INSN(Register Rd, Register Rn, unsigned imm) { \
1113 wrap_adds_subs_imm_insn(Rd, Rn, imm, &Assembler::INSN, &Assembler::INSN); \
1114 } \
1115 \
1116 void INSN(Register Rd, Register Rn, Register Rm, \
1117 enum shift_kind kind, unsigned shift = 0) { \
1118 Assembler::INSN(Rd, Rn, Rm, kind, shift); \
1119 } \
1120 \
1121 void INSN(Register Rd, Register Rn, Register Rm) { \
1122 Assembler::INSN(Rd, Rn, Rm); \
1123 } \
1124 \
1125 void INSN(Register Rd, Register Rn, Register Rm, \
1126 ext::operation option, int amount = 0) { \
1127 Assembler::INSN(Rd, Rn, Rm, option, amount); \
1128 }
1129
1130 WRAP(adds) WRAP(addsw) WRAP(subs) WRAP(subsw)
1131
1132 void add(Register Rd, Register Rn, RegisterOrConstant increment);
1133 void addw(Register Rd, Register Rn, RegisterOrConstant increment);
1134 void sub(Register Rd, Register Rn, RegisterOrConstant decrement);
1135 void subw(Register Rd, Register Rn, RegisterOrConstant decrement);
1136
1137 void adrp(Register reg1, const Address &dest, unsigned long &byte_offset);
1138
1139 void tableswitch(Register index, jint lowbound, jint highbound,
1140 Label &jumptable, Label &jumptable_end, int stride = 1) {
1141 adr(rscratch1, jumptable);
1142 subsw(rscratch2, index, lowbound);
1143 subsw(zr, rscratch2, highbound - lowbound);
1144 br(Assembler::HS, jumptable_end);
1145 add(rscratch1, rscratch1, rscratch2,
1146 ext::sxtw, exact_log2(stride * Assembler::instruction_size));
1147 br(rscratch1);
1148 }
1149
1150 // Form an address from base + offset in Rd. Rd may or may not
1151 // actually be used: you must use the Address that is returned. It
1152 // is up to you to ensure that the shift provided matches the size
1153 // of your data.
1154 Address form_address(Register Rd, Register base, long byte_offset, int shift);
1155
1156 // Return true iff an address is within the 48-bit AArch64 address
1157 // space.
1158 bool is_valid_AArch64_address(address a) {
1159 return ((uint64_t)a >> 48) == 0;
1160 }
1161
1162 // Load the base of the cardtable byte map into reg.
1163 void load_byte_map_base(Register reg);
1164
1165 // Prolog generator routines to support switch between x86 code and
1166 // generated ARM code
1167
1168 // routine to generate an x86 prolog for a stub function which
1169 // bootstraps into the generated ARM code which directly follows the
1170 // stub
1171 //
1172
1173 public:
1174 // enum used for aarch64--x86 linkage to define return type of x86 function
1175 enum ret_type { ret_type_void, ret_type_integral, ret_type_float, ret_type_double};
1176
1177 #ifdef BUILTIN_SIM
1178 void c_stub_prolog(int gp_arg_count, int fp_arg_count, int ret_type, address *prolog_ptr = NULL);
1179 #else
1180 void c_stub_prolog(int gp_arg_count, int fp_arg_count, int ret_type) { }
1181 #endif
1182
1183 // special version of call_VM_leaf_base needed for aarch64 simulator
1184 // where we need to specify both the gp and fp arg counts and the
1185 // return type so that the linkage routine from aarch64 to x86 and
1186 // back knows which aarch64 registers to copy to x86 registers and
1187 // which x86 result register to copy back to an aarch64 register
1188
1189 void call_VM_leaf_base1(
1190 address entry_point, // the entry point
1191 int number_of_gp_arguments, // the number of gp reg arguments to pass
1192 int number_of_fp_arguments, // the number of fp reg arguments to pass
1193 ret_type type, // the return type for the call
1194 Label* retaddr = NULL
1195 );
1196
1197 void ldr_constant(Register dest, const Address &const_addr) {
1198 if (NearCpool) {
1199 ldr(dest, const_addr);
1200 } else {
1201 unsigned long offset;
1202 adrp(dest, InternalAddress(const_addr.target()), offset);
1203 ldr(dest, Address(dest, offset));
1204 }
1205 }
1206
1207 address read_polling_page(Register r, address page, relocInfo::relocType rtype);
1208 address read_polling_page(Register r, relocInfo::relocType rtype);
1209 void get_polling_page(Register dest, address page, relocInfo::relocType rtype);
1210
1211 // CRC32 code for java.util.zip.CRC32::updateBytes() instrinsic.
1212 void update_byte_crc32(Register crc, Register val, Register table);
1213 void update_word_crc32(Register crc, Register v, Register tmp,
1214 Register table0, Register table1, Register table2, Register table3,
1215 bool upper = false);
1216
1217 void string_compare(Register str1, Register str2,
1218 Register cnt1, Register cnt2, Register result,
1219 Register tmp1, Register tmp2, FloatRegister vtmp1,
1220 FloatRegister vtmp2, FloatRegister vtmp3, int ae);
1221
1222 void has_negatives(Register ary1, Register len, Register result);
1223
1224 void arrays_equals(Register a1, Register a2, Register result, Register cnt1,
1225 Register tmp1, Register tmp2, Register tmp3, int elem_size);
1226
1227 void string_equals(Register a1, Register a2, Register result, Register cnt1,
1228 int elem_size);
1229
1230 void fill_words(Register base, Register cnt, Register value);
1231 void zero_words(Register base, u_int64_t cnt);
1232 void zero_words(Register ptr, Register cnt);
1233 void zero_dcache_blocks(Register base, Register cnt);
1234
1235 static const int zero_words_block_size;
1236
1237 void byte_array_inflate(Register src, Register dst, Register len,
1238 FloatRegister vtmp1, FloatRegister vtmp2,
1239 FloatRegister vtmp3, Register tmp4);
1240
1241 void char_array_compress(Register src, Register dst, Register len,
1242 FloatRegister tmp1Reg, FloatRegister tmp2Reg,
1243 FloatRegister tmp3Reg, FloatRegister tmp4Reg,
1244 Register result);
1245
1246 void encode_iso_array(Register src, Register dst,
1247 Register len, Register result,
1248 FloatRegister Vtmp1, FloatRegister Vtmp2,
1249 FloatRegister Vtmp3, FloatRegister Vtmp4);
1250 void string_indexof(Register str1, Register str2,
1251 Register cnt1, Register cnt2,
1252 Register tmp1, Register tmp2,
1253 Register tmp3, Register tmp4,
1254 Register tmp5, Register tmp6,
1255 int int_cnt1, Register result, int ae);
1256 void string_indexof_char(Register str1, Register cnt1,
1257 Register ch, Register result,
1258 Register tmp1, Register tmp2, Register tmp3);
1259 void fast_log(FloatRegister vtmp0, FloatRegister vtmp1, FloatRegister vtmp2,
1260 FloatRegister vtmp3, FloatRegister vtmp4, FloatRegister vtmp5,
1261 FloatRegister tmpC1, FloatRegister tmpC2, FloatRegister tmpC3,
1262 FloatRegister tmpC4, Register tmp1, Register tmp2,
1263 Register tmp3, Register tmp4, Register tmp5);
1264 void generate_dsin_dcos(bool isCos, address npio2_hw, address two_over_pi,
1265 address pio2, address dsin_coef, address dcos_coef);
1266 private:
1267 // begin trigonometric functions support block
1268 void generate__ieee754_rem_pio2(address npio2_hw, address two_over_pi, address pio2);
1269 void generate__kernel_rem_pio2(address two_over_pi, address pio2);
1270 void generate_kernel_sin(FloatRegister x, bool iyIsOne, address dsin_coef);
1271 void generate_kernel_cos(FloatRegister x, address dcos_coef);
1272 // end trigonometric functions support block
1273 void add2_with_carry(Register final_dest_hi, Register dest_hi, Register dest_lo,
1274 Register src1, Register src2);
1275 void add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2) {
1276 add2_with_carry(dest_hi, dest_hi, dest_lo, src1, src2);
1277 }
1278 void multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
1279 Register y, Register y_idx, Register z,
1280 Register carry, Register product,
1281 Register idx, Register kdx);
1282 void multiply_128_x_128_loop(Register y, Register z,
1283 Register carry, Register carry2,
1284 Register idx, Register jdx,
1285 Register yz_idx1, Register yz_idx2,
1286 Register tmp, Register tmp3, Register tmp4,
1287 Register tmp7, Register product_hi);
1288 void kernel_crc32_using_crc32(Register crc, Register buf,
1289 Register len, Register tmp0, Register tmp1, Register tmp2,
1290 Register tmp3);
1291 void kernel_crc32c_using_crc32c(Register crc, Register buf,
1292 Register len, Register tmp0, Register tmp1, Register tmp2,
1293 Register tmp3);
1294 public:
1295 void multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z,
1296 Register zlen, Register tmp1, Register tmp2, Register tmp3,
1297 Register tmp4, Register tmp5, Register tmp6, Register tmp7);
1298 void mul_add(Register out, Register in, Register offs, Register len, Register k);
1299 // ISB may be needed because of a safepoint
1300 void maybe_isb() { isb(); }
1301
1302 private:
1303 // Return the effective address r + (r1 << ext) + offset.
1304 // Uses rscratch2.
1305 Address offsetted_address(Register r, Register r1, Address::extend ext,
1306 int offset, int size);
1307
1308 private:
1309 // Returns an address on the stack which is reachable with a ldr/str of size
1310 // Uses rscratch2 if the address is not directly reachable
1311 Address spill_address(int size, int offset, Register tmp=rscratch2);
1312
1313 bool merge_alignment_check(Register base, size_t size, long cur_offset, long prev_offset) const;
1314
1315 // Check whether two loads/stores can be merged into ldp/stp.
1316 bool ldst_can_merge(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store) const;
1317
1318 // Merge current load/store with previous load/store into ldp/stp.
1319 void merge_ldst(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store);
1320
1321 // Try to merge two loads/stores into ldp/stp. If success, returns true else false.
1322 bool try_merge_ldst(Register rt, const Address &adr, size_t cur_size_in_bytes, bool is_store);
1323
1324 public:
1325 void spill(Register Rx, bool is64, int offset) {
1326 if (is64) {
1327 str(Rx, spill_address(8, offset));
1328 } else {
1329 strw(Rx, spill_address(4, offset));
1330 }
1331 }
1332 void spill(FloatRegister Vx, SIMD_RegVariant T, int offset) {
1333 str(Vx, T, spill_address(1 << (int)T, offset));
1334 }
1335 void unspill(Register Rx, bool is64, int offset) {
1336 if (is64) {
1337 ldr(Rx, spill_address(8, offset));
1338 } else {
1339 ldrw(Rx, spill_address(4, offset));
1340 }
1341 }
1342 void unspill(FloatRegister Vx, SIMD_RegVariant T, int offset) {
1343 ldr(Vx, T, spill_address(1 << (int)T, offset));
1344 }
1345 void spill_copy128(int src_offset, int dst_offset,
1346 Register tmp1=rscratch1, Register tmp2=rscratch2) {
1347 if (src_offset < 512 && (src_offset & 7) == 0 &&
1348 dst_offset < 512 && (dst_offset & 7) == 0) {
1349 ldp(tmp1, tmp2, Address(sp, src_offset));
1350 stp(tmp1, tmp2, Address(sp, dst_offset));
1351 } else {
1352 unspill(tmp1, true, src_offset);
1353 spill(tmp1, true, dst_offset);
1354 unspill(tmp1, true, src_offset+8);
1355 spill(tmp1, true, dst_offset+8);
1356 }
1357 }
1358 };
1359
1360 #ifdef ASSERT
1361 inline bool AbstractAssembler::pd_check_instruction_mark() { return false; }
1362 #endif
1363
1364 /**
1365 * class SkipIfEqual:
1366 *
1367 * Instantiating this class will result in assembly code being output that will
1368 * jump around any code emitted between the creation of the instance and it's
1369 * automatic destruction at the end of a scope block, depending on the value of
1370 * the flag passed to the constructor, which will be checked at run-time.
1371 */
1372 class SkipIfEqual {
1373 private:
1374 MacroAssembler* _masm;
1375 Label _label;
1376
1377 public:
1378 SkipIfEqual(MacroAssembler*, const bool* flag_addr, bool value);
1379 ~SkipIfEqual();
1380 };
1381
1382 struct tableswitch {
1383 Register _reg;
1384 int _insn_index; jint _first_key; jint _last_key;
1385 Label _after;
1386 Label _branches;
1387 };
1388
1389 #endif // CPU_AARCH64_VM_MACROASSEMBLER_AARCH64_HPP