143 assert(AllocatePrefetchLines > 0, "invalid value");
144 if (AllocatePrefetchLines < 1) { // Set valid value in product VM.
145 AllocatePrefetchLines = 1; // Conservative value.
146 }
147
148 if (AllocatePrefetchStyle == 3 && AllocatePrefetchDistance < cache_line_size) {
149 AllocatePrefetchStyle = 1; // Fall back if inappropriate.
150 }
151
152 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive");
153
154 // Implementation does not use any of the vector instructions
155 // available with Power8. Their exploitation is still pending.
156 if (!UseCRC32Intrinsics) {
157 if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
158 FLAG_SET_DEFAULT(UseCRC32Intrinsics, true);
159 }
160 }
161
162 // The AES intrinsic stubs require AES instruction support.
163 #if defined(VM_LITTLE_ENDIAN)
164 if (has_vcipher()) {
165 if (FLAG_IS_DEFAULT(UseAES)) {
166 UseAES = true;
167 }
168 } else if (UseAES) {
169 if (!FLAG_IS_DEFAULT(UseAES))
170 warning("AES instructions are not available on this CPU");
171 FLAG_SET_DEFAULT(UseAES, false);
172 }
173
174 if (UseAES && has_vcipher()) {
175 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
176 UseAESIntrinsics = true;
177 }
178 } else if (UseAESIntrinsics) {
179 if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
180 warning("AES intrinsics are not available on this CPU");
181 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
182 }
183
184 #else
185 if (UseAES) {
186 warning("AES instructions are not available on this CPU");
187 FLAG_SET_DEFAULT(UseAES, false);
188 }
189 if (UseAESIntrinsics) {
190 if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
191 warning("AES intrinsics are not available on this CPU");
192 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
193 }
194 #endif
195
196 if (UseSHA) {
197 warning("SHA instructions are not available on this CPU");
198 FLAG_SET_DEFAULT(UseSHA, false);
199 }
200 if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {
201 warning("SHA intrinsics are not available on this CPU");
202 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
203 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
204 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
205 }
206
207 if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) {
208 UseMontgomeryMultiplyIntrinsic = true;
209 }
210 if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) {
211 UseMontgomerySquareIntrinsic = true;
212 }
213 }
214
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143 assert(AllocatePrefetchLines > 0, "invalid value");
144 if (AllocatePrefetchLines < 1) { // Set valid value in product VM.
145 AllocatePrefetchLines = 1; // Conservative value.
146 }
147
148 if (AllocatePrefetchStyle == 3 && AllocatePrefetchDistance < cache_line_size) {
149 AllocatePrefetchStyle = 1; // Fall back if inappropriate.
150 }
151
152 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive");
153
154 // Implementation does not use any of the vector instructions
155 // available with Power8. Their exploitation is still pending.
156 if (!UseCRC32Intrinsics) {
157 if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
158 FLAG_SET_DEFAULT(UseCRC32Intrinsics, true);
159 }
160 }
161
162 // The AES intrinsic stubs require AES instruction support.
163 if (has_vcipher()) {
164 if (FLAG_IS_DEFAULT(UseAES)) {
165 UseAES = true;
166 }
167 } else if (UseAES) {
168 if (!FLAG_IS_DEFAULT(UseAES))
169 warning("AES instructions are not available on this CPU");
170 FLAG_SET_DEFAULT(UseAES, false);
171 }
172
173 if (UseAES && has_vcipher()) {
174 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
175 UseAESIntrinsics = true;
176 }
177 } else if (UseAESIntrinsics) {
178 if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
179 warning("AES intrinsics are not available on this CPU");
180 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
181 }
182
183 if (UseSHA) {
184 warning("SHA instructions are not available on this CPU");
185 FLAG_SET_DEFAULT(UseSHA, false);
186 }
187 if (UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics) {
188 warning("SHA intrinsics are not available on this CPU");
189 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
190 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
191 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
192 }
193
194 if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) {
195 UseMontgomeryMultiplyIntrinsic = true;
196 }
197 if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) {
198 UseMontgomerySquareIntrinsic = true;
199 }
200 }
201
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