From 7177633477f1b9851a949c2c7b005185c3925b23 Mon Sep 17 00:00:00 2001
From: taitep <taitep@taitep.se>
Date: Mon, 22 Dec 2025 18:00:15 +0100
Subject: [PATCH] WHY WAS I USING S-TYPE IMMEDIATE IN LD (also add some more
 debugging info on an exception)

---
 src/core.rs             | 1 +
 src/instructions/rvi.rs | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core.rs b/src/core.rs
index ce704fb..08f029b 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -64,6 +64,7 @@ impl Core {
                     InstructionResult::Normal => {}
                     InstructionResult::Exception(_e) => {
                         eprintln!("Exception from instruction");
+                        eprintln!("PC: {:016X}, instr: {:08X}", self.pc, instr.0);
                         break;
                     }
                     InstructionResult::Pause => {
diff --git a/src/instructions/rvi.rs b/src/instructions/rvi.rs
index f182e88..0920e80 100644
--- a/src/instructions/rvi.rs
+++ b/src/instructions/rvi.rs
@@ -62,7 +62,7 @@ pub fn sd(core: &mut Core, instr: Instruction) -> InstructionResult {
 }
 
 pub fn ld(core: &mut Core, instr: Instruction) -> InstructionResult {
-    let addr = core.reg_read(instr.rs1()).wrapping_add(instr.imm_s());
+    let addr = core.reg_read(instr.rs1()).wrapping_add(instr.imm_i());
 
     if !addr.is_multiple_of(std::mem::size_of::<DWord>() as Addr) {
         return InstructionResult::Exception(());