Merge pull request #22251 from pshipton/vectorcpu

Implement jdk25 VectorSupport_getCPUFeatures

Author: keithc-ca

runtime/jcl/common/vectornatives.cpp

@@ -70,4 +70,19 @@ Java_jdk_internal_vm_vector_VectorSupport_getMaxLaneCount(JNIEnv *env, jclass cl
 	return laneCount;
 }
 
+#if JAVA_SPEC_VERSION >= 25
+jstring JNICALL
+Java_jdk_internal_vm_vector_VectorSupport_getCPUFeatures(JNIEnv *env, jclass clazz)
+{
+	char buf[1024];
+	OMRPORT_ACCESS_FROM_J9VMTHREAD((J9VMThread *)env);
+	OMRProcessorDesc processorDesc;
+	buf[0] = '\0';
+	if (0 == omrsysinfo_get_processor_description(&processorDesc)) {
+		omrsysinfo_get_processor_feature_string(&processorDesc, buf, sizeof(buf));
+	}
+	return env->NewStringUTF(buf);
 }
+#endif /* JAVA_SPEC_VERSION >= 25 */
+
+} /* extern "C" */

runtime/jcl/exports.cmake

@@ -863,3 +863,10 @@ if(NOT JAVA_SPEC_VERSION LESS 24)
 		Java_com_ibm_oti_vm_VM_isYieldBlockedVirtualThreadsEnabled
 	)
 endif()
+
+# Java 25+
+if(NOT JAVA_SPEC_VERSION LESS 25)
+	omr_add_exports(jclse
+		Java_jdk_internal_vm_vector_VectorSupport_getCPUFeatures
+	)
+endif()

runtime/oti/jclprots.h

@@ -706,7 +706,10 @@ jint JNICALL
 Java_jdk_internal_vm_vector_VectorSupport_registerNatives(JNIEnv *env, jclass clazz);
 jint JNICALL
 Java_jdk_internal_vm_vector_VectorSupport_getMaxLaneCount(JNIEnv *env, jclass clazz, jclass elementType);
-
+#if JAVA_SPEC_VERSION >= 25
+jstring JNICALL
+Java_jdk_internal_vm_vector_VectorSupport_getCPUFeatures(JNIEnv *env, jclass clazz);
+#endif /* JAVA_SPEC_VERSION >= 25 */
 
 /* BBjclNativesCommonVM*/
 jint JNICALL Java_com_ibm_oti_vm_VM_getBootClassPathCount (JNIEnv * env, jclass clazz);