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