1 /*
2 * Copyright (c) 2015, 2016, 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 package jdk.vm.ci.code.test.sparc;
25
26 import jdk.vm.ci.code.CodeCacheProvider;
27 import jdk.vm.ci.code.DebugInfo;
28 import jdk.vm.ci.code.Register;
29 import jdk.vm.ci.code.StackSlot;
30 import jdk.vm.ci.code.site.ConstantReference;
31 import jdk.vm.ci.code.site.DataSectionReference;
32 import jdk.vm.ci.code.test.TestAssembler;
33 import jdk.vm.ci.code.test.TestHotSpotVMConfig;
34 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
35 import jdk.vm.ci.hotspot.HotSpotCompiledCode;
36 import jdk.vm.ci.hotspot.HotSpotConstant;
37 import jdk.vm.ci.hotspot.HotSpotForeignCallTarget;
38 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
39 import jdk.vm.ci.meta.JavaKind;
40 import jdk.vm.ci.meta.VMConstant;
41 import jdk.vm.ci.sparc.SPARC;
42 import jdk.vm.ci.sparc.SPARCKind;
43
44 public class SPARCTestAssembler extends TestAssembler {
45
46 private static final int MASK13 = (1 << 13) - 1;
47
48 public SPARCTestAssembler(CodeCacheProvider codeCache, TestHotSpotVMConfig config) {
49 super(codeCache, config, 0, 16, SPARCKind.WORD, SPARC.l0, SPARC.l1, SPARC.l2, SPARC.l3, SPARC.l4, SPARC.l5, SPARC.l6, SPARC.l7);
50 }
51
52 private void emitOp2(Register rd, int op2, int imm22) {
53 code.emitInt((0b00 << 30) | (rd.encoding << 25) | (op2 << 22) | imm22);
54 }
55
56 private void emitOp3(int op, Register rd, int op3, Register rs1, Register rs2) {
57 code.emitInt((op << 30) | (rd.encoding << 25) | (op3 << 19) | (rs1.encoding << 14) | rs2.encoding);
58 }
59
60 private void emitOp3(int op, Register rd, int op3, Register rs1, int simm13) {
61 code.emitInt((op << 30) | (rd.encoding << 25) | (op3 << 19) | (rs1.encoding << 14) | (1 << 13) | (simm13 & MASK13));
62 }
63
64 private void emitNop() {
65 code.emitInt(1 << 24);
66 }
67
68 @Override
69 public void emitPrologue() {
70 // SAVE sp, -128, sp
71 emitOp3(0b10, SPARC.sp, 0b111100, SPARC.sp, -SPARC.REGISTER_SAFE_AREA_SIZE);
72 setDeoptRescueSlot(newStackSlot(SPARCKind.XWORD));
73 }
74
75 @Override
76 public void emitEpilogue() {
77 recordMark(config.MARKID_DEOPT_HANDLER_ENTRY);
78 recordCall(new HotSpotForeignCallTarget(config.handleDeoptStub), 4, true, null);
79 code.emitInt(1 << 30); // CALL
80 }
81
82 @Override
83 public HotSpotCompiledCode finish(HotSpotResolvedJavaMethod method) {
84 frameSize += SPARC.REGISTER_SAFE_AREA_SIZE;
85 return super.finish(method);
86 }
87
88 @Override
89 public void emitGrowStack(int size) {
90 emitOp3(0b10, SPARC.sp, 0b000100, SPARC.sp, size); // SUB sp, size, sp
91 }
92
93 @Override
94 public Register emitIntArg0() {
95 return codeCache.getRegisterConfig().getCallingConventionRegisters(HotSpotCallingConventionType.JavaCallee, JavaKind.Int)[0];
96 }
97
98 @Override
99 public Register emitIntArg1() {
100 return codeCache.getRegisterConfig().getCallingConventionRegisters(HotSpotCallingConventionType.JavaCallee, JavaKind.Int)[1];
101 }
102
103 @Override
104 public Register emitLoadInt(int c) {
105 Register ret = newRegister();
106 int hi = c >>> 10;
107 int lo = c & ((1 << 10) - 1);
108 if (hi == 0) {
109 emitOp3(0b10, ret, 0b000010, SPARC.g0, lo); // OR g0, lo, ret
110 } else {
111 emitOp2(ret, 0b100, hi); // SETHI hi, ret
112 if (lo != 0) {
113 emitOp3(0b10, ret, 0b000010, ret, lo); // OR ret, lo, ret
114 }
115 }
116 return ret;
117 }
118
119 @Override
120 public Register emitLoadLong(long c) {
121 if ((c & 0xFFFF_FFFFL) == c) {
122 return emitLoadInt((int) c);
123 } else {
124 DataSectionReference ref = new DataSectionReference();
125 data.align(8);
126 ref.setOffset(data.position());
127 data.emitLong(c);
128 return emitLoadPointer(ref);
129 }
130 }
131
132 private void emitPatchableSethi(Register ret, boolean wide) {
133 int startPos = code.position();
134 emitOp2(ret, 0b100, 0); // SETHI 0, ret
135 if (wide) {
136 // pad for later patching
137 while (code.position() < (startPos + 28)) {
138 emitNop();
139 }
140 }
141 }
142
143 @Override
144 public Register emitLoadFloat(float c) {
145 DataSectionReference ref = new DataSectionReference();
146 data.align(4);
147 ref.setOffset(data.position());
148 data.emitFloat(c);
149
150 Register ptr = newRegister();
151 recordDataPatchInCode(ref);
152 emitPatchableSethi(ptr, true);
153 emitOp3(0b11, SPARC.f0, 0b100000, ptr, 0); // LDF [ptr+0], f0
154 return SPARC.f0;
155 }
156
157 @Override
158 public Register emitLoadPointer(HotSpotConstant c) {
159 Register ret = newRegister();
160 recordDataPatchInCode(new ConstantReference((VMConstant) c));
161
162 emitPatchableSethi(ret, !c.isCompressed());
163 emitOp3(0b10, ret, 0b000010, ret, 0); // OR ret, 0, ret
164
165 return ret;
166 }
167
168 @Override
169 public Register emitLoadPointer(DataSectionReference ref) {
170 Register ret = newRegister();
171 recordDataPatchInCode(ref);
172 emitPatchableSethi(ret, true);
173 emitOp3(0b11, ret, 0b001011, ret, 0); // LDX [ret+0], ret
174 return ret;
175 }
176
177 @Override
178 public Register emitLoadNarrowPointer(DataSectionReference ref) {
179 Register ret = newRegister();
180 recordDataPatchInCode(ref);
181 emitPatchableSethi(ret, true);
182 emitOp3(0b11, ret, 0b000000, ret, 0); // LDUW [ret+0], ret
183 return ret;
184 }
185
186 @Override
187 public Register emitLoadPointer(Register b, int offset) {
188 Register ret = newRegister();
189 emitOp3(0b11, ret, 0b001011, b, offset); // LDX [b+offset], ret
190 return ret;
191 }
192
193 @Override
194 public StackSlot emitIntToStack(Register a) {
195 StackSlot ret = newStackSlot(SPARCKind.WORD);
196 // STW a, [fp+offset]
197 emitOp3(0b11, a, 0b000100, SPARC.fp, ret.getRawOffset() + SPARC.STACK_BIAS);
198 return ret;
199 }
200
201 @Override
202 public StackSlot emitLongToStack(Register a) {
203 StackSlot ret = newStackSlot(SPARCKind.XWORD);
204 // STX a, [fp+offset]
205 emitOp3(0b11, a, 0b001110, SPARC.fp, ret.getRawOffset() + SPARC.STACK_BIAS);
206 return ret;
207 }
208
209 @Override
210 public StackSlot emitFloatToStack(Register a) {
211 StackSlot ret = newStackSlot(SPARCKind.SINGLE);
212 // STF a, [fp+offset]
213 emitOp3(0b11, a, 0b100100, SPARC.fp, ret.getRawOffset() + SPARC.STACK_BIAS);
214 return ret;
215 }
216
217 @Override
218 public StackSlot emitPointerToStack(Register a) {
219 StackSlot ret = newStackSlot(SPARCKind.XWORD);
220 // STX a, [fp+offset]
221 emitOp3(0b11, a, 0b001110, SPARC.fp, ret.getRawOffset() + SPARC.STACK_BIAS);
222 return ret;
223 }
224
225 @Override
226 public StackSlot emitNarrowPointerToStack(Register a) {
227 StackSlot ret = newStackSlot(SPARCKind.WORD);
228 // STW a, [fp+offset]
229 emitOp3(0b11, a, 0b000100, SPARC.fp, ret.getRawOffset() + SPARC.STACK_BIAS);
230 return ret;
231 }
232
233 @Override
234 public Register emitUncompressPointer(Register compressed, long base, int shift) {
235 Register ret;
236 if (shift > 0) {
237 ret = newRegister();
238 emitOp3(0b10, ret, 0b100101, compressed, shift); // SLL compressed, shift, ret
239 } else {
240 ret = compressed;
241 }
242 if (base == 0) {
243 return ret;
244 } else {
245 Register b = emitLoadLong(base);
246 emitOp3(0b10, b, 0b00000, ret, b); // ADD b, ret, b
247 return b;
248 }
249 }
250
251 @Override
252 public Register emitIntAdd(Register a, Register b) {
253 Register ret = newRegister();
254 emitOp3(0b10, ret, 0b00000, a, b); // ADD a, b, ret
255 return ret;
256 }
257
258 private void emitMove(Register to, Register from) {
259 if (to != from) {
260 emitOp3(0b10, to, 0b000010, from, SPARC.g0); // OR from, g0, to
261 }
262 }
263
264 @Override
265 public void emitIntRet(Register a) {
266 emitPointerRet(a);
267 }
268
269 @Override
270 public void emitPointerRet(Register a) {
271 emitMove(SPARC.i0, a);
272 emitOp3(0b10, SPARC.g0, 0b111000, SPARC.i7, 8); // JMPL [i7+8], g0
273 emitOp3(0b10, SPARC.g0, 0b111101, SPARC.g0, SPARC.g0); // RESTORE g0, g0, g0
274 }
275
276 @Override
277 public void emitTrap(DebugInfo info) {
278 recordImplicitException(info);
279 emitOp3(0b11, SPARC.g0, 0b001011, SPARC.g0, 0); // LDX [g0+0], g0
280 }
281
282 @Override
283 public DataSectionReference emitDataItem(HotSpotConstant c) {
284 if (c.isCompressed()) {
285 data.align(4);
286 } else {
287 data.align(8);
288 }
289 return super.emitDataItem(c);
290 }
291 }