implement SLT

1 files changed, 20 insertions, 0 deletions

diff --git a/src/vm/instruction.js b/src/vm/instruction.js
index df5369d..a79427b 100644
--- a/src/vm/instruction.js
+++ b/src/vm/instruction.js
@@ -81,3 +81,23 @@ exports.CMP = function(core, pc, ins) {
 		}
 	}
 }
+
+
+exports.SLT = function(core, pc, ins) {
+	if (ins.a.mode === AddrMode.Immediate) {
+		const test = core.getValue(pc, ins.b);
+		if (ins.a.value < test.b.value) {
+			return [pc + 2];
+		} else {
+			return [pc + 1];
+		}
+	} else {
+		const left = core.getValue(pc, ins.a);
+		const right = core.getValue(pc, ins.b);
+		if (left.b.value < right.b.value) {
+			return [pc + 2];
+		} else {
+			return [pc + 1];
+		}
+	}
+}