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