From 6ec50cd441b5c33f6487015ddb7843e7d37f0a1e Mon Sep 17 00:00:00 2001
From: Sai Vegasena <saidcooldude@gmail.com>
Date: Wed, 20 Nov 2024 12:31:24 +0100
Subject: [PATCH] o1vm/riscv32: implement R type instruction sll

---
 o1vm/src/interpreters/riscv32im/interpreter.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/o1vm/src/interpreters/riscv32im/interpreter.rs b/o1vm/src/interpreters/riscv32im/interpreter.rs
index 072d6b6e51..180cbfd216 100644
--- a/o1vm/src/interpreters/riscv32im/interpreter.rs
+++ b/o1vm/src/interpreters/riscv32im/interpreter.rs
@@ -1312,7 +1312,17 @@ pub fn interpret_rtype<Env: InterpreterEnv>(env: &mut Env, instr: RInstruction)
             env.set_next_instruction_pointer(next_instruction_pointer + Env::constant(4u32));
         }
         RInstruction::ShiftLeftLogical => {
-            unimplemented!("ShiftLeftLogical");
+            /* sll: x[rd] = x[rs1] << x[rs2] */
+            let local_rs1 = env.read_register(&rs1);
+            let local_rs2 = env.read_register(&rs2);
+            let local_rd = unsafe {
+                let rd_scratch = env.alloc_scratch();
+                env.shift_left(&local_rs1, &local_rs2, rd_scratch)
+            };
+            env.write_register(&rd, local_rd);
+
+            env.set_instruction_pointer(next_instruction_pointer.clone());
+            env.set_next_instruction_pointer(next_instruction_pointer + Env::constant(4u32));
         }
         RInstruction::SetLessThan => {
             unimplemented!("SetLessThan");