From 224fa02c13ee4d1e152ae9095401d5f4b32073f9 Mon Sep 17 00:00:00 2001
From: Torrey0 <147440137+Torrey0@users.noreply.github.com>
Date: Tue, 17 Mar 2026 21:53:49 -0700
Subject: [PATCH] Fixed ALU nzp computation having the n and p bits swapped,
 and performing unsigned subtration overflow.

---
 src/alu.sv | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/alu.sv b/src/alu.sv
index 4d23614..9e826dd 100644
--- a/src/alu.sv
+++ b/src/alu.sv
@@ -36,7 +36,8 @@ module alu (
             if (core_state == 3'b101) begin 
                 if (decoded_alu_output_mux == 1) begin 
                     // Set values to compare with NZP register in alu_out[2:0]
-                    alu_out_reg <= {5'b0, (rs - rt > 0), (rs - rt == 0), (rs - rt < 0)};
+                    //                        n          z           p
+                    alu_out_reg <= {5'b0, (rs < rt), (rs == rt), (rs > rt)};
                 end else begin 
                     // Execute the specified arithmetic instruction
                     case (decoded_alu_arithmetic_mux)