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@@ -0,0 +1,194 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
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+ *
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+ * Unit tests for memory functions
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+ *
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+ * The architecture dependent implementations run through different lines of
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+ * code depending on the alignment and length of memory regions copied or set.
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+ * This has to be considered in testing.
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+ */
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+
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+#include <common.h>
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+#include <command.h>
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+#include <test/lib.h>
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+#include <test/test.h>
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+#include <test/ut.h>
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+
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+/* Xor mask used for marking memory regions */
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+#define MASK 0xA5
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+/* Number of different alignment values */
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+#define SWEEP 16
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+/* Allow for copying up to 32 bytes */
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+#define BUFLEN (SWEEP + 33)
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+
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+/**
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+ * init_buffer() - initialize buffer
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+ *
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+ * The buffer is filled with incrementing values xor'ed with the mask.
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+ *
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+ * @buf: buffer
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+ * @mask: xor mask
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+ */
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+static void init_buffer(u8 buf[], u8 mask)
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+{
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+ int i;
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+
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+ for (i = 0; i < BUFLEN; ++i)
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+ buf[i] = i ^ mask;
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+}
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+
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+/**
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+ * test_memset() - test result of memset()
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+ *
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+ * @uts: unit test state
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+ * @buf: buffer
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+ * @mask: value set by memset()
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+ * @offset: relative start of region changed by memset() in buffer
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+ * @len: length of region changed by memset()
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+ * Return: 0 = success, 1 = failure
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+ */
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+static int test_memset(struct unit_test_state *uts, u8 buf[], u8 mask,
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+ int offset, int len)
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+{
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+ int i;
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+
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+ for (i = 0; i < BUFLEN; ++i) {
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+ if (i < offset || i >= offset + len) {
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+ ut_asserteq(i, buf[i]);
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+ } else {
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+ ut_asserteq(mask, buf[i]);
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+ }
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+ }
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+ return 0;
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+}
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+
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+/**
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+ * lib_memset() - unit test for memset()
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+ *
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+ * Test memset() with varied alignment and length of the changed buffer.
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+ *
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+ * @uts: unit test state
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+ * Return: 0 = success, 1 = failure
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+ */
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+static int lib_memset(struct unit_test_state *uts)
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+{
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+ u8 buf[BUFLEN];
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+ int offset, len;
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+ void *ptr;
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+
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+ for (offset = 0; offset <= SWEEP; ++offset) {
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+ for (len = 1; len < BUFLEN - SWEEP; ++len) {
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+ init_buffer(buf, 0);
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+ ptr = memset(buf + offset, MASK, len);
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+ ut_asserteq_ptr(buf + offset, (u8 *)ptr);
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+ if (test_memset(uts, buf, MASK, offset, len)) {
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+ debug("%s: failure %d, %d\n",
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+ __func__, offset, len);
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+ return CMD_RET_FAILURE;
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+ }
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+ }
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+ }
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+ return 0;
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+}
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+
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+LIB_TEST(lib_memset, 0);
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+
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+/**
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+ * test_memmove() - test result of memcpy() or memmove()
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+ *
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+ * @uts: unit test state
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+ * @buf: buffer
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+ * @mask: xor mask used to initialize source buffer
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+ * @offset1: relative start of copied region in source buffer
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+ * @offset2: relative start of copied region in destination buffer
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+ * @len: length of region changed by memset()
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+ * Return: 0 = success, 1 = failure
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+ */
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+static int test_memmove(struct unit_test_state *uts, u8 buf[], u8 mask,
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+ int offset1, int offset2, int len)
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+{
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+ int i;
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+
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+ for (i = 0; i < BUFLEN; ++i) {
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+ if (i < offset2 || i >= offset2 + len) {
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+ ut_asserteq(i, buf[i]);
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+ } else {
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+ ut_asserteq((i + offset1 - offset2) ^ mask, buf[i]);
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+ }
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+ }
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+ return 0;
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+}
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+
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+/**
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+ * lib_memcpy() - unit test for memcpy()
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+ *
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+ * Test memcpy() with varied alignment and length of the copied buffer.
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+ *
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+ * @uts: unit test state
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+ * Return: 0 = success, 1 = failure
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+ */
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+static int lib_memcpy(struct unit_test_state *uts)
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+{
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+ u8 buf1[BUFLEN];
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+ u8 buf2[BUFLEN];
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+ int offset1, offset2, len;
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+ void *ptr;
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+
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+ init_buffer(buf1, MASK);
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+
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+ for (offset1 = 0; offset1 <= SWEEP; ++offset1) {
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+ for (offset2 = 0; offset2 <= SWEEP; ++offset2) {
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+ for (len = 1; len < BUFLEN - SWEEP; ++len) {
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+ init_buffer(buf2, 0);
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+ ptr = memcpy(buf2 + offset2, buf1 + offset1,
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+ len);
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+ ut_asserteq_ptr(buf2 + offset2, (u8 *)ptr);
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+ if (test_memmove(uts, buf2, MASK, offset1,
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+ offset2, len)) {
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+ debug("%s: failure %d, %d, %d\n",
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+ __func__, offset1, offset2, len);
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+ return CMD_RET_FAILURE;
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+ }
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+ }
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+ }
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+ }
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+ return 0;
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+}
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+
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+LIB_TEST(lib_memcpy, 0);
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+
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+/**
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+ * lib_memmove() - unit test for memmove()
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+ *
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+ * Test memmove() with varied alignment and length of the copied buffer.
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+ *
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+ * @uts: unit test state
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+ * Return: 0 = success, 1 = failure
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+ */
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+static int lib_memmove(struct unit_test_state *uts)
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+{
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+ u8 buf[BUFLEN];
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+ int offset1, offset2, len;
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+ void *ptr;
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+
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+ for (offset1 = 0; offset1 <= SWEEP; ++offset1) {
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+ for (offset2 = 0; offset2 <= SWEEP; ++offset2) {
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+ for (len = 1; len < BUFLEN - SWEEP; ++len) {
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+ init_buffer(buf, 0);
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+ ptr = memmove(buf + offset2, buf + offset1,
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+ len);
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+ ut_asserteq_ptr(buf + offset2, (u8 *)ptr);
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+ if (test_memmove(uts, buf, 0, offset1, offset2,
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+ len)) {
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+ debug("%s: failure %d, %d, %d\n",
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+ __func__, offset1, offset2, len);
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+ return CMD_RET_FAILURE;
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+ }
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+ }
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+ }
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+ }
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+ return 0;
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+}
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+
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+LIB_TEST(lib_memmove, 0);
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