chore: add non-working pipeline

src/cpu/arm/branch.zig

@@ -9,14 +9,24 @@ const sext = @import("../../util.zig").sext;
 pub fn branch(comptime L: bool) InstrFn {
     return struct {
         fn inner(cpu: *Arm7tdmi, _: *Bus, opcode: u32) void {
-            if (L) cpu.r[14] = cpu.r[15];
-            cpu.r[15] = cpu.fakePC() +% (sext(u32, u24, opcode) << 2);
+            if (L) cpu.r[14] = cpu.r[15] - 4;
+
+            cpu.r[15] = cpu.r[15] +% (sext(u32, u24, opcode) << 2);
+            cpu.reloadPipeline(u32);
         }
     }.inner;
 }
 
 pub fn branchAndExchange(cpu: *Arm7tdmi, _: *Bus, opcode: u32) void {
     const rn = opcode & 0xF;
-    cpu.cpsr.t.write(cpu.r[rn] & 1 == 1);
-    cpu.r[15] = cpu.r[rn] & 0xFFFF_FFFE;
+
+    if (cpu.r[rn] & 1 == 1) {
+        cpu.r[15] = cpu.r[rn] & ~@as(u32, 1);
+        cpu.cpsr.t.set();
+        cpu.reloadPipeline(u16);
+    } else {
+        cpu.r[15] = cpu.r[rn] & ~@as(u32, 3);
+        cpu.cpsr.t.unset();
+        cpu.reloadPipeline(u32);
+    }
 }