From f7a82b643e867e18bee1e41037634c43d969e74b Mon Sep 17 00:00:00 2001
From: Wojciech Kosior <kwojtus@protonmail.com>
Date: Wed, 2 Sep 2020 09:10:53 +0200
Subject: add bench for jump instruction

---
 Makefile                                     |  3 ++-
 tests/stack_machine_jump/instructions.s.tcl  | 22 ++++++++++++++++++++++
 tests/stack_machine_jump/test.v              |  1 +
 tests/stack_machine_jump/words_to_verify.mem |  2 ++
 4 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100755 tests/stack_machine_jump/instructions.s.tcl
 create mode 120000 tests/stack_machine_jump/test.v
 create mode 100644 tests/stack_machine_jump/words_to_verify.mem

diff --git a/Makefile b/Makefile
index 21346c7..53eccf2 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,8 @@ STACK_MACHINE_TESTS := \
 	add \
 	sub \
 	div \
-	mul
+	mul \
+	jump
 
 # Add other tests here if You need
 TESTS := \
diff --git a/tests/stack_machine_jump/instructions.s.tcl b/tests/stack_machine_jump/instructions.s.tcl
new file mode 100755
index 0000000..f681fc9
--- /dev/null
+++ b/tests/stack_machine_jump/instructions.s.tcl
@@ -0,0 +1,22 @@
+#!/usr/bin/env tclsh
+
+source tclasm.tcl
+
+## Let there be 2 pieces of code - each one storing a different value in memory
+## and halting afterwards. Jump instruction should cause the second piece of
+## code to execute instead of the first. We'll verify that by checking, which
+## value got written.
+
+## Ufortunately, our assembly currently doesn't compute label addresses for us.
+
+# Each of those 4 instructions should get encoded into 1 16-bit word, so they
+# will take 8 bytes total. Hence jump to address 8 is needed to skip them.
+jump 8
+const h12
+store@ h00100
+halt
+
+# address 8 here
+const h34
+store@ h00100
+halt
diff --git a/tests/stack_machine_jump/test.v b/tests/stack_machine_jump/test.v
new file mode 120000
index 0000000..f5b6a59
--- /dev/null
+++ b/tests/stack_machine_jump/test.v
@@ -0,0 +1 @@
+../stack_machine_store/test.v
\ No newline at end of file
diff --git a/tests/stack_machine_jump/words_to_verify.mem b/tests/stack_machine_jump/words_to_verify.mem
new file mode 100644
index 0000000..4fded2b
--- /dev/null
+++ b/tests/stack_machine_jump/words_to_verify.mem
@@ -0,0 +1,2 @@
+// address  value
+   00100    34
-- 
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