add unsigned division remainder instruction

4 files changed, 25 insertions, 0 deletions

diff --git a/tests/stack_machine_rem/Makefile b/tests/stack_machine_rem/Makefile
new file mode 120000
index 0000000..2c3c770
--- /dev/null
+++ b/tests/stack_machine_rem/Makefile
@@ -0,0 +1 @@
+../stack_machine_store/Makefile
\ No newline at end of file
diff --git a/tests/stack_machine_rem/instructions.s.tcl b/tests/stack_machine_rem/instructions.s.tcl
new file mode 100644
index 0000000..1376d51
--- /dev/null
+++ b/tests/stack_machine_rem/instructions.s.tcl
@@ -0,0 +1,17 @@
+### store 2 values to memory, load them back, divide one by another and store
+### the result (remainder); this is analogous to addition and substraction tests
+
+set_sp 0
+
+const 777681520
+store h1EEE0
+const 3721
+store h1EEE4
+
+load h1EEE0
+load h1EEE4
+# dividing 777681520 by 3721 should yield 208997 r 3683
+rem
+store h1EEE8
+
+halt
diff --git a/tests/stack_machine_rem/test.v b/tests/stack_machine_rem/test.v
new file mode 120000
index 0000000..f5b6a59
--- /dev/null
+++ b/tests/stack_machine_rem/test.v
@@ -0,0 +1 @@
+../stack_machine_store/test.v
\ No newline at end of file
diff --git a/tests/stack_machine_rem/words_to_verify.mem b/tests/stack_machine_rem/words_to_verify.mem
new file mode 100644
index 0000000..c11e8b5
--- /dev/null
+++ b/tests/stack_machine_rem/words_to_verify.mem
@@ -0,0 +1,6 @@
+// address  value
+   1EEE0    2E5A7A70  // 777681520 in hex is 2E5A7A70
+
+   1EEE4    E89  // 3721 in hex is E89
+
+   1EEE8    E63  // 3683 in hex is E63