From d03863f5a211809db49da118f7e0d754abc65e51 Mon Sep 17 00:00:00 2001
From: taitep <taitep@taitep.se>
Date: Sun, 21 Dec 2025 14:00:47 +0100
Subject: Implement SLLI and fix sign extension of immediates for I-type and
 S-type instructions

---
 src/instructions/rvi.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/instructions')

diff --git a/src/instructions/rvi.rs b/src/instructions/rvi.rs
index 2d342df..2eb48f9 100644
--- a/src/instructions/rvi.rs
+++ b/src/instructions/rvi.rs
@@ -64,3 +64,18 @@ pub fn jal(core: &mut Core, instr: Instruction) -> InstructionResult {
     core.pc = core.pc.wrapping_add(instr.imm_j());
     InstructionResult::Normal
 }
+
+pub fn slli(core: &mut Core, instr: Instruction) -> InstructionResult {
+    core.reg_write(instr.rd(), core.reg_read(instr.rs1()) << instr.imm_shamt());
+
+    eprintln!(
+        "slli x{}, x{}, {}",
+        instr.rd(),
+        instr.rs1(),
+        instr.imm_shamt()
+    );
+
+    core.pc = core.pc.wrapping_add(4);
+
+    InstructionResult::Normal
+}
-- 
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