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diff --git a/tests/test-progs/asmtest/src/riscv/isa/rv64uamt/amoadd_d.S b/tests/test-progs/asmtest/src/riscv/isa/rv64uamt/amoadd_d.S
new file mode 100644
index 000000000..cf744c46f
--- /dev/null
+++ b/tests/test-progs/asmtest/src/riscv/isa/rv64uamt/amoadd_d.S
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2018, Cornell University
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of Cornell University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Tuan Ta
+ */
+
+//------------------------------------------------------------------------
+// This code tests amoadd_d instruction in multi-threading system.
+// Each thread increments a globally shared variable LOOP_COUNT times.
+// Once a thread completes, it signals its completition by atomically
+// incrementing a barrier variable.
+// Master thread (i.e., thread 0) waits for all threads to complete by
+// spinning on the barrier variable until all threads update the variable.
+// Then, the master thread checks the shared variable's value.
+//------------------------------------------------------------------------
+
+#include "riscv_test.h"
+#include "test_macros.h"
+#include "test_macros_mt.h"
+
+  RVTEST_RV64U
+  RVTEST_CODE_BEGIN
+
+#define LOOP_COUNT  1000
+#define RESULT      LOOP_COUNT * NUM_THREADS
+
+//------------------------------------------------------------------------
+// Master thread creates new threads, waits for all threads to complete,
+// deallocates threads and checks result
+//------------------------------------------------------------------------
+  call _create_threads
+  call _join
+  call _delete_threads
+  call _check
+
+  RVTEST_CODE_END
+
+//------------------------------------------------------------------------
+// mt_test function executed in child threads
+// A child thread signals its completion by atomicaly adding 1 to barrier
+//------------------------------------------------------------------------
+_mt_test:
+  li        t0, 1               // one operand of amoadd_w
+  li        t1, LOOP_COUNT      // loop count
+  la        a0, shared_var
+1:
+  amoadd.d  zero, t0, (a0)
+  addi      t1, t1, -1
+  bnez      t1, 1b
+
+  la        a0, barrier
+  amoadd.d  zero, t0, (a0)
+
+  RVTEST_CODE_END
+
+//------------------------------------------------------------------------
+// Master thread checks result
+//------------------------------------------------------------------------
+_check:
+  la        a0, shared_var
+  li        a1, RESULT
+  ld        a0, (a0)
+  bne       a0, a1, _fail
+  li        a0, SUCCESS
+  ret
+
+_fail:
+  li        a0, FAILURE
+  ret
+
+  .data
+
+MT_DATA