1 /*
2 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24
25
26 package org.graalvm.compiler.core.aarch64;
27
28 import static jdk.vm.ci.aarch64.AArch64.sp;
29 import static jdk.vm.ci.aarch64.AArch64Kind.DWORD;
30 import static jdk.vm.ci.aarch64.AArch64Kind.QWORD;
31 import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant;
32 import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant;
33 import static org.graalvm.compiler.lir.aarch64.AArch64BitManipulationOp.BitManipulationOpCode.BSR;
34 import static org.graalvm.compiler.lir.aarch64.AArch64BitManipulationOp.BitManipulationOpCode.CLZ;
35 import static org.graalvm.compiler.lir.aarch64.AArch64BitManipulationOp.BitManipulationOpCode.CTZ;
36
37 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
38 import org.graalvm.compiler.core.common.LIRKind;
39 import org.graalvm.compiler.core.common.NumUtil;
40 import org.graalvm.compiler.core.common.calc.FloatConvert;
41 import org.graalvm.compiler.debug.GraalError;
42 import org.graalvm.compiler.lir.ConstantValue;
43 import org.graalvm.compiler.lir.LIRFrameState;
44 import org.graalvm.compiler.lir.Variable;
45 import org.graalvm.compiler.lir.aarch64.AArch64AddressValue;
46 import org.graalvm.compiler.lir.aarch64.AArch64ArithmeticLIRGeneratorTool;
47 import org.graalvm.compiler.lir.aarch64.AArch64ArithmeticOp;
48 import org.graalvm.compiler.lir.aarch64.AArch64BitManipulationOp;
49 import org.graalvm.compiler.lir.aarch64.AArch64Move.LoadOp;
50 import org.graalvm.compiler.lir.aarch64.AArch64Move.StoreConstantOp;
51 import org.graalvm.compiler.lir.aarch64.AArch64Move.StoreOp;
52 import org.graalvm.compiler.lir.aarch64.AArch64ReinterpretOp;
53 import org.graalvm.compiler.lir.aarch64.AArch64SignExtendOp;
54 import org.graalvm.compiler.lir.aarch64.AArch64Unary;
55 import org.graalvm.compiler.lir.gen.ArithmeticLIRGenerator;
56
57 import jdk.vm.ci.aarch64.AArch64Kind;
58 import jdk.vm.ci.code.RegisterValue;
59 import jdk.vm.ci.meta.AllocatableValue;
60 import jdk.vm.ci.meta.JavaConstant;
61 import jdk.vm.ci.meta.PlatformKind;
62 import jdk.vm.ci.meta.Value;
63 import jdk.vm.ci.meta.ValueKind;
64
65 public class AArch64ArithmeticLIRGenerator extends ArithmeticLIRGenerator implements AArch64ArithmeticLIRGeneratorTool {
66
67 @Override
68 public AArch64LIRGenerator getLIRGen() {
69 return (AArch64LIRGenerator) super.getLIRGen();
70 }
71
72 @Override
73 protected boolean isNumericInteger(PlatformKind kind) {
74 return ((AArch64Kind) kind).isInteger();
75 }
76
77 @Override
78 protected Variable emitAdd(LIRKind resultKind, Value a, Value b, boolean setFlags) {
79 if (isNumericInteger(a.getPlatformKind())) {
80 AArch64ArithmeticOp op = setFlags ? AArch64ArithmeticOp.ADDS : AArch64ArithmeticOp.ADD;
81 return emitBinary(resultKind, op, true, a, b);
82 } else {
83 assert !setFlags : "Cannot set flags on floating point arithmetic";
84 return emitBinary(resultKind, AArch64ArithmeticOp.FADD, true, a, b);
85 }
86 }
87
88 @Override
89 protected Variable emitSub(LIRKind resultKind, Value a, Value b, boolean setFlags) {
90 if (isNumericInteger(a.getPlatformKind())) {
91 AArch64ArithmeticOp op = setFlags ? AArch64ArithmeticOp.SUBS : AArch64ArithmeticOp.SUB;
92 return emitBinary(resultKind, op, false, a, b);
93 } else {
94 assert !setFlags : "Cannot set flags on floating point arithmetic";
95 return emitBinary(resultKind, AArch64ArithmeticOp.FSUB, false, a, b);
96 }
97 }
98
99 public Value emitExtendMemory(boolean isSigned, AArch64Kind memoryKind, int resultBits, AArch64AddressValue address, LIRFrameState state) {
100 // Issue a zero extending load of the proper bit size and set the result to
101 // the proper kind.
102 Variable result = getLIRGen().newVariable(LIRKind.value(resultBits == 32 ? AArch64Kind.DWORD : AArch64Kind.QWORD));
103
104 int targetSize = resultBits <= 32 ? 32 : 64;
105 switch (memoryKind) {
106 case BYTE:
107 case WORD:
108 case DWORD:
109 case QWORD:
110 getLIRGen().append(new AArch64Unary.MemoryOp(isSigned, targetSize,
111 memoryKind.getSizeInBytes() * 8, result, address, state));
112 break;
113 default:
114 throw GraalError.shouldNotReachHere();
115 }
116 return result;
117 }
118
119 @Override
120 public Value emitMul(Value a, Value b, boolean setFlags) {
121 AArch64ArithmeticOp intOp = setFlags ? AArch64ArithmeticOp.MULVS : AArch64ArithmeticOp.MUL;
122 return emitBinary(LIRKind.combine(a, b), getOpCode(a, intOp, AArch64ArithmeticOp.FMUL), true, a, b);
123 }
124
125 @Override
126 public Value emitMulHigh(Value a, Value b) {
127 assert isNumericInteger(a.getPlatformKind());
128 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.SMULH, true, a, b);
129 }
130
131 @Override
132 public Value emitUMulHigh(Value a, Value b) {
133 assert isNumericInteger(a.getPlatformKind());
134 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.UMULH, true, a, b);
135 }
136
137 @Override
138 public Value emitDiv(Value a, Value b, LIRFrameState state) {
139 return emitBinary(LIRKind.combine(a, b), getOpCode(a, AArch64ArithmeticOp.DIV, AArch64ArithmeticOp.FDIV), false, asAllocatable(a), asAllocatable(b));
140 }
141
142 @Override
143 public Value emitRem(Value a, Value b, LIRFrameState state) {
144 return emitBinary(LIRKind.combine(a, b), getOpCode(a, AArch64ArithmeticOp.REM, AArch64ArithmeticOp.FREM), false, asAllocatable(a), asAllocatable(b));
145 }
146
147 @Override
148 public Value emitUDiv(Value a, Value b, LIRFrameState state) {
149 assert isNumericInteger(a.getPlatformKind());
150 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.UDIV, false, asAllocatable(a), asAllocatable(b));
151 }
152
153 @Override
154 public Value emitURem(Value a, Value b, LIRFrameState state) {
155 assert isNumericInteger(a.getPlatformKind());
156 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.UREM, false, asAllocatable(a), asAllocatable(b));
157 }
158
159 @Override
160 public Value emitAnd(Value a, Value b) {
161 assert isNumericInteger(a.getPlatformKind());
162 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.AND, true, a, b);
163 }
164
165 @Override
166 public Value emitOr(Value a, Value b) {
167 assert isNumericInteger(a.getPlatformKind());
168 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.OR, true, a, b);
169 }
170
171 @Override
172 public Value emitXor(Value a, Value b) {
173 assert isNumericInteger(a.getPlatformKind());
174 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.XOR, true, a, b);
175 }
176
177 @Override
178 public Value emitShl(Value a, Value b) {
179 assert isNumericInteger(a.getPlatformKind());
180 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.SHL, false, a, b);
181 }
182
183 @Override
184 public Value emitShr(Value a, Value b) {
185 assert isNumericInteger(a.getPlatformKind());
186 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.ASHR, false, a, b);
187 }
188
189 @Override
190 public Value emitUShr(Value a, Value b) {
191 assert isNumericInteger(a.getPlatformKind());
192 return emitBinary(LIRKind.combine(a, b), AArch64ArithmeticOp.LSHR, false, a, b);
193 }
194
195 @Override
196 public Value emitFloatConvert(FloatConvert op, Value inputVal) {
197 PlatformKind resultPlatformKind = getFloatConvertResultKind(op);
198 LIRKind resultLirKind = LIRKind.combine(inputVal).changeType(resultPlatformKind);
199 Variable result = getLIRGen().newVariable(resultLirKind);
200 getLIRGen().append(new AArch64FloatConvertOp(op, result, asAllocatable(inputVal)));
201 return result;
202 }
203
204 private static PlatformKind getFloatConvertResultKind(FloatConvert op) {
205 switch (op) {
206 case F2I:
207 case D2I:
208 return AArch64Kind.DWORD;
209 case F2L:
210 case D2L:
211 return AArch64Kind.QWORD;
212 case I2F:
213 case L2F:
214 case D2F:
215 return AArch64Kind.SINGLE;
216 case I2D:
217 case L2D:
218 case F2D:
219 return AArch64Kind.DOUBLE;
220 default:
221 throw GraalError.shouldNotReachHere();
222 }
223 }
224
225 @Override
226 public Value emitReinterpret(LIRKind to, Value inputVal) {
227 ValueKind<?> from = inputVal.getValueKind();
228 if (to.equals(from)) {
229 return inputVal;
230 }
231 Variable result = getLIRGen().newVariable(to);
232 getLIRGen().append(new AArch64ReinterpretOp(result, asAllocatable(inputVal)));
233 return result;
234 }
235
236 @Override
237 public Value emitNarrow(Value inputVal, int bits) {
238 if (inputVal.getPlatformKind() == AArch64Kind.QWORD && bits <= 32) {
239 LIRKind resultKind = getResultLirKind(bits, inputVal);
240 long mask = NumUtil.getNbitNumberLong(bits);
241 Value maskValue = new ConstantValue(resultKind, JavaConstant.forLong(mask));
242 return emitBinary(resultKind, AArch64ArithmeticOp.AND, true, inputVal, maskValue);
243 } else {
244 return inputVal;
245 }
246 }
247
248 @Override
249 public Value emitZeroExtend(Value inputVal, int fromBits, int toBits) {
250 assert fromBits <= toBits && toBits <= 64;
251 if (fromBits == toBits) {
252 return inputVal;
253 }
254 LIRKind resultKind = getResultLirKind(toBits, inputVal);
255 long mask = NumUtil.getNbitNumberLong(fromBits);
256 Value maskValue = new ConstantValue(resultKind, JavaConstant.forLong(mask));
257 return emitBinary(resultKind, AArch64ArithmeticOp.AND, true, inputVal, maskValue);
258 }
259
260 @Override
261 public Value emitSignExtend(Value inputVal, int fromBits, int toBits) {
262 LIRKind resultKind = getResultLirKind(toBits, inputVal);
263 assert fromBits <= toBits && toBits <= 64;
264 if (fromBits == toBits) {
265 return inputVal;
266 } else if (isJavaConstant(inputVal)) {
267 JavaConstant javaConstant = asJavaConstant(inputVal);
268 long constant;
269 if (javaConstant.isNull()) {
270 constant = 0;
271 } else {
272 constant = javaConstant.asLong();
273 }
274 int shiftCount = QWORD.getSizeInBytes() * 8 - fromBits;
275 return new ConstantValue(resultKind, JavaConstant.forLong((constant << shiftCount) >> shiftCount));
276 }
277 Variable result = getLIRGen().newVariable(resultKind);
278 getLIRGen().append(new AArch64SignExtendOp(result, asAllocatable(inputVal), fromBits, toBits));
279 return result;
280 }
281
282 private static LIRKind getResultLirKind(int resultBitSize, Value... inputValues) {
283 if (resultBitSize == 64) {
284 return LIRKind.combine(inputValues).changeType(QWORD);
285 } else {
286 // FIXME: I have no idea what this assert was ever for
287 // assert resultBitSize == 32;
288 return LIRKind.combine(inputValues).changeType(DWORD);
289 }
290 }
291
292 protected Variable emitBinary(ValueKind<?> resultKind, AArch64ArithmeticOp op, boolean commutative, Value a, Value b) {
293 Variable result = getLIRGen().newVariable(resultKind);
294 if (isValidBinaryConstant(op, a, b)) {
295 emitBinaryConst(result, op, asAllocatable(a), asJavaConstant(b));
296 } else if (commutative && isValidBinaryConstant(op, b, a)) {
297 emitBinaryConst(result, op, asAllocatable(b), asJavaConstant(a));
298 } else {
299 emitBinaryVar(result, op, asAllocatable(a), asAllocatable(b));
300 }
301 return result;
302 }
303
304 private void emitBinaryVar(Variable result, AArch64ArithmeticOp op, AllocatableValue a, AllocatableValue b) {
305 AllocatableValue x = moveSp(a);
306 AllocatableValue y = moveSp(b);
307 switch (op) {
308 case FREM:
309 case REM:
310 case UREM:
311 getLIRGen().append(new AArch64ArithmeticOp.BinaryCompositeOp(op, result, x, y));
312 break;
313 default:
314 getLIRGen().append(new AArch64ArithmeticOp.BinaryOp(op, result, x, y));
315 break;
316 }
317 }
318
319 private void emitBinaryConst(Variable result, AArch64ArithmeticOp op, AllocatableValue a, JavaConstant b) {
320 AllocatableValue x = moveSp(a);
321 getLIRGen().append(new AArch64ArithmeticOp.BinaryConstOp(op, result, x, b));
322 }
323
324 private static boolean isValidBinaryConstant(AArch64ArithmeticOp op, Value a, Value b) {
325 if (!isJavaConstant(b)) {
326 return false;
327 }
328 JavaConstant constValue = asJavaConstant(b);
329 switch (op.category) {
330 case LOGICAL:
331 return isLogicalConstant(constValue);
332 case ARITHMETIC:
333 return isArithmeticConstant(constValue);
334 case SHIFT:
335 assert constValue.asLong() >= 0 && constValue.asLong() < a.getPlatformKind().getSizeInBytes() * Byte.SIZE;
336 return true;
337 case NONE:
338 return false;
339 default:
340 throw GraalError.shouldNotReachHere();
341 }
342 }
343
344 private static boolean isLogicalConstant(JavaConstant constValue) {
345 switch (constValue.getJavaKind()) {
346 case Int:
347 return AArch64MacroAssembler.isLogicalImmediate(constValue.asInt());
348 case Long:
349 return AArch64MacroAssembler.isLogicalImmediate(constValue.asLong());
350 default:
351 return false;
352 }
353 }
354
355 protected static boolean isArithmeticConstant(JavaConstant constValue) {
356 switch (constValue.getJavaKind()) {
357 case Int:
358 case Long:
359 return AArch64MacroAssembler.isArithmeticImmediate(constValue.asLong());
360 case Object:
361 return constValue.isNull();
362 default:
363 return false;
364 }
365 }
366
367 @Override
368 public Value emitNegate(Value inputVal) {
369 return emitUnary(getOpCode(inputVal, AArch64ArithmeticOp.NEG, AArch64ArithmeticOp.FNEG), inputVal);
370 }
371
372 @Override
373 public Value emitNot(Value input) {
374 assert isNumericInteger(input.getPlatformKind());
375 return emitUnary(AArch64ArithmeticOp.NOT, input);
376 }
377
378 @Override
379 public Value emitMathAbs(Value input) {
380 return emitUnary(getOpCode(input, AArch64ArithmeticOp.ABS, AArch64ArithmeticOp.FABS), input);
381 }
382
383 @Override
384 public Value emitMathSqrt(Value input) {
385 assert input.getPlatformKind() == AArch64Kind.DOUBLE;
386 return emitUnary(AArch64ArithmeticOp.SQRT, input);
387 }
388
389 @Override
390 public Variable emitBitScanForward(Value value) {
391 throw GraalError.unimplemented();
392 }
393
394 @Override
395 public Value emitBitCount(Value operand) {
396 throw GraalError.unimplemented("AArch64 ISA does not offer way to implement this more efficiently than a simple Java algorithm.");
397 }
398
399 @Override
400 public Value emitBitScanReverse(Value value) {
401 Variable result = getLIRGen().newVariable(LIRKind.combine(value).changeType(AArch64Kind.DWORD));
402 getLIRGen().append(new AArch64BitManipulationOp(BSR, result, asAllocatable(value)));
403 return result;
404 }
405
406 @Override
407 public Value emitCountLeadingZeros(Value value) {
408 Variable result = getLIRGen().newVariable(LIRKind.combine(value).changeType(AArch64Kind.DWORD));
409 getLIRGen().append(new AArch64BitManipulationOp(CLZ, result, asAllocatable(value)));
410 return result;
411 }
412
413 @Override
414 public Value emitCountTrailingZeros(Value value) {
415 Variable result = getLIRGen().newVariable(LIRKind.combine(value).changeType(AArch64Kind.DWORD));
416 getLIRGen().append(new AArch64BitManipulationOp(CTZ, result, asAllocatable(value)));
417 return result;
418 }
419
420 private Variable emitUnary(AArch64ArithmeticOp op, Value inputVal) {
421 AllocatableValue input = asAllocatable(inputVal);
422 Variable result = getLIRGen().newVariable(LIRKind.combine(input));
423 getLIRGen().append(new AArch64ArithmeticOp.UnaryOp(op, result, input));
424 return result;
425 }
426
427 /**
428 * If val denotes the stackpointer, move it to another location. This is necessary since most
429 * ops cannot handle the stackpointer as input or output.
430 */
431 private AllocatableValue moveSp(AllocatableValue val) {
432 if (val instanceof RegisterValue && ((RegisterValue) val).getRegister().equals(sp)) {
433 assert val.getPlatformKind() == AArch64Kind.QWORD : "Stackpointer must be long";
434 return getLIRGen().emitMove(val);
435 }
436 return val;
437 }
438
439 /**
440 * Returns the opcode depending on the platform kind of val.
441 */
442 private AArch64ArithmeticOp getOpCode(Value val, AArch64ArithmeticOp intOp, AArch64ArithmeticOp floatOp) {
443 return isNumericInteger(val.getPlatformKind()) ? intOp : floatOp;
444 }
445
446 @Override
447 public Variable emitLoad(LIRKind kind, Value address, LIRFrameState state) {
448 AArch64AddressValue loadAddress = getLIRGen().asAddressValue(address);
449 Variable result = getLIRGen().newVariable(getLIRGen().toRegisterKind(kind));
450 getLIRGen().append(new LoadOp((AArch64Kind) kind.getPlatformKind(), result, loadAddress, state));
451 return result;
452 }
453
454 @Override
455 public void emitStore(ValueKind<?> lirKind, Value address, Value inputVal, LIRFrameState state) {
456 AArch64AddressValue storeAddress = getLIRGen().asAddressValue(address);
457 AArch64Kind kind = (AArch64Kind) lirKind.getPlatformKind();
458
459 if (isJavaConstant(inputVal) && kind.isInteger()) {
460 JavaConstant c = asJavaConstant(inputVal);
461 if (c.isDefaultForKind()) {
462 // We can load 0 directly into integer registers
463 getLIRGen().append(new StoreConstantOp(kind, storeAddress, c, state));
464 return;
465 }
466 }
467 AllocatableValue input = asAllocatable(inputVal);
468 getLIRGen().append(new StoreOp(kind, storeAddress, input, state));
469 }
470
471 @Override
472 public Value emitMathLog(Value input, boolean base10) {
473 throw GraalError.unimplemented();
474 }
475
476 @Override
477 public Value emitMathCos(Value input) {
478 throw GraalError.unimplemented();
479 }
480
481 @Override
482 public Value emitMathSin(Value input) {
483 throw GraalError.unimplemented();
484 }
485
486 @Override
487 public Value emitMathTan(Value input) {
488 throw GraalError.unimplemented();
489 }
490
491 @Override
492 public void emitCompareOp(AArch64Kind cmpKind, Variable left, Value right) {
493 throw GraalError.unimplemented();
494 }
495
496 @Override
497 public Value emitRound(Value value, RoundingMode mode) {
498 AArch64ArithmeticOp op;
499 switch (mode) {
500 case NEAREST:
501 op = AArch64ArithmeticOp.FRINTN;
502 break;
503 case UP:
504 op = AArch64ArithmeticOp.FRINTP;
505 break;
506 case DOWN:
507 op = AArch64ArithmeticOp.FRINTM;
508 break;
509 default:
510 throw GraalError.shouldNotReachHere();
511 }
512
513 return emitUnary(op, value);
514 }
515 }