Test "Scalable Vector Extension (SVE) support." on arm64

Change-Id: I3abaca932985a06b06887b962e769f2eac96c738

test/sve/src/023.c

@@ -0,0 +1,93 @@
+/* 023.c COPYRIGHT FUJITSU LIMITED 2017-2019 */
+/* Preservation VL check signalhsndler before and after. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/prctl.h>
+#include "common.h"
+
+static void sig_handler(int sig)
+{
+	unsigned int vl = sve_get_vl();
+	unsigned int vq = sve_vq_from_vl(vl);
+	void *wr_buf = calloc(1, (vl * 35) + 15);
+	void *align_wr_buf = (void *)(((unsigned long)(wr_buf + 15)) & ~15UL);
+	unsigned int fpscr[2] = { 0, 0 };
+
+	if (!wr_buf) {
+		printf("calloc() failed.\n");
+		goto out;
+	}
+
+	/* set dirty */
+	gen_test_sve_dirty(align_wr_buf, vq);
+	write_sve(align_wr_buf, vq, fpscr);
+
+	free(wr_buf);
+out:
+	return;
+}
+
+TEST_FUNC(TEST_NUMBER, vl, vq, unused1, unused2)
+{
+	const int use_vq = sve_vq_from_vl(gen_set_vl(vl));
+	struct fpsimd_sve_state(use_vq) rd_buf;
+	struct fpsimd_sve_state(use_vq) wr_buf;
+	unsigned int fpscr[2] = { 0, 0 };
+	int ret = -1;
+	unsigned int before_vl;
+	unsigned int after_vl;
+
+	print_test_overview(tp_num);
+
+	memset(&rd_buf, 0, sizeof(rd_buf));
+	memset(&wr_buf, 0, sizeof(wr_buf));
+
+	if (signal(SIGUSR1, sig_handler) == SIG_ERR) {
+		printf("Set signal handler failed.\n");
+		goto out;
+	}
+
+	if (set_and_compare_vl(gen_set_vl(vl) | PR_SVE_VL_INHERIT)) {
+		printf("prctl: error.\n");
+		goto out;
+	}
+
+	/* before sighandler */
+	gen_test_sve(&wr_buf, sve_vq_from_vl(gen_set_vl(vl)));
+	write_sve(&wr_buf, sve_vq_from_vl(gen_set_vl(vl)), fpscr);
+
+	before_vl = sve_get_vl();
+	if (raise(SIGUSR1)) {
+		perror("raise(SIGUSR1)");
+		goto out;
+	}
+	after_vl = sve_get_vl();
+
+	if (before_vl != after_vl) {
+		printf("before VL=%d, after VL=%d\n", before_vl, after_vl);
+		printf("VL compare failed.\n");
+		goto out;
+	}
+
+	/* after sighandler */
+	read_sve(&rd_buf, sve_vq_from_vl(after_vl), fpscr);
+
+	/* compare */
+	if (sve_compare(&wr_buf, &rd_buf, sve_vq_from_vl(after_vl))) {
+		printf("compare failed.\n");
+		goto out;
+	}
+
+	/* success. */
+	ret = 0;
+out:
+	if (ret == 0) {
+		printf("RESULT: OK.\n");
+	} else {
+		printf("RESULT: NG.\n");
+	}
+	return ret;
+}