start anew

3 files changed, 31 insertions, 0 deletions

diff --git a/tests/stack_machine_sub/instructions.s.tcl b/tests/stack_machine_sub/instructions.s.tcl
new file mode 100755
index 0000000..3f8fb48
--- /dev/null
+++ b/tests/stack_machine_sub/instructions.s.tcl
@@ -0,0 +1,21 @@
+#!/usr/bin/env tclsh
+
+source tclasm.tcl
+
+### store 2 values to memory, load them back, substract them and store the
+### result; this is analogous to addition test
+
+set_sp h7FFFC
+const 68996288
+store@ h1EEE0
+const 540904416
+store@ h1EEE4
+
+load@ h1EEE0
+stack down
+load@ h1EEE4
+# substracting 540904416 from 68996288 should yield -471908128
+sub
+stack up
+store@ h1EEE8
+halt
diff --git a/tests/stack_machine_sub/test.v b/tests/stack_machine_sub/test.v
new file mode 120000
index 0000000..f5b6a59
--- /dev/null
+++ b/tests/stack_machine_sub/test.v
@@ -0,0 +1 @@
+../stack_machine_store/test.v
\ No newline at end of file
diff --git a/tests/stack_machine_sub/words_to_verify.mem b/tests/stack_machine_sub/words_to_verify.mem
new file mode 100644
index 0000000..cc666fa
--- /dev/null
+++ b/tests/stack_machine_sub/words_to_verify.mem
@@ -0,0 +1,9 @@
+// address  value
+   1EEE0    CCC0  // 68996288 in hex is 41CCCC0
+   1EEE2    41C
+
+   1EEE4    8BE0  // 540904416 in hex is 203D8BE0
+   1EEE6    203D
+
+   1EEE8    40E0  // -471908128 in hex is E3DF40E0
+   1EEEA    E3DF