From 49a94ca17421c66f96a7c660cbba618498081ea0 Mon Sep 17 00:00:00 2001
From: Toby Jaffey <toby@ringtailsoftware.co.uk>
Date: Sun, 14 Dec 2025 21:53:54 +0000
Subject: [PATCH] Add BLT test

---
 test/opcodes/rom/rom.c    |  8 ++++++++
 test/opcodes/shared.h     |  1 +
 test/opcodes/test/tests.c | 16 ++++++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/test/opcodes/rom/rom.c b/test/opcodes/rom/rom.c
index 064affa..799a0ad 100644
--- a/test/opcodes/rom/rom.c
+++ b/test/opcodes/rom/rom.c
@@ -7,6 +7,14 @@ void main(void) {
             asm("auipc t0, 0"); // copy pc into t0
             asm("auipc t1, 0"); // copy pc into t1
         break;
+        case TEST2:
+            asm("li  t0, 2");
+            asm("li  t1, 1");
+            label2:
+            println("loop");
+            asm goto("blt t0, t1, %l0" : : : : label2);
+        break;
+
     }
 }
 
diff --git a/test/opcodes/shared.h b/test/opcodes/shared.h
index c9db0c3..00905de 100644
--- a/test/opcodes/shared.h
+++ b/test/opcodes/shared.h
@@ -3,4 +3,5 @@
 
 enum {
     TEST1,
+    TEST2,
 };
diff --git a/test/opcodes/test/tests.c b/test/opcodes/test/tests.c
index 6736cd5..3b1fcdc 100644
--- a/test/opcodes/test/tests.c
+++ b/test/opcodes/test/tests.c
@@ -59,4 +59,20 @@ void test_auipc(void) {
     TEST_ASSERT_EQUAL(vmst._core.regs[6], vmst._core.regs[5] + 4);
 }
 
+void test_blt(void) {
+    uvm32_run(&vmst, &evt, 100);
+    // check for picktest syscall
+    TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
+    TEST_ASSERT_EQUAL(evt.data.syscall.code, SYSCALL_PICKTEST);
+    uvm32_arg_setval(&vmst, &evt, RET, TEST2);
+
+    uvm32_run(&vmst, &evt, 100);
+    TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
+    TEST_ASSERT_EQUAL(evt.data.syscall.code, UVM32_SYSCALL_PRINTLN);
+
+    // run vm to completion
+    uvm32_run(&vmst, &evt, 100);
+    TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_END);
+}
+