From 8d1df7ae43a67c27b7a5346d5efd7a3a1e3ac9d3 Mon Sep 17 00:00:00 2001
From: Rekai Musuka <rekai@musuka.dev>
Date: Sun, 30 Jan 2022 01:12:34 -0400
Subject: [PATCH] fix(cpu): properly decode ldm stm thumb instructions

---
 src/cpu.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cpu.zig b/src/cpu.zig
index 65058df..519e1bf 100644
--- a/src/cpu.zig
+++ b/src/cpu.zig
@@ -402,7 +402,7 @@ fn thumbPopulate() [0x400]ThumbInstrFn {
 
             if (i >> 6 & 0xF == 0b1100) {
                 const L = i >> 5 & 1 == 1;
-                const rb = i >> 2 & 0x3;
+                const rb = i >> 2 & 0x7;
 
                 lut[i] = format15(L, rb);
             }