feat(cpu): implement format 18 THUMB instructions

src/cpu.zig

@@ -240,23 +240,15 @@ pub const Arm7tdmi = struct {
     pub fn panic(self: *const Self, comptime format: []const u8, args: anytype) noreturn {
         var i: usize = 0;
         while (i < 16) : (i += 4) {
-            const i_1 = i + 1;
-            const i_2 = i + 2;
-            const i_3 = i + 3;
-            std.debug.print("R{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\n", .{ i, self.r[i], i_1, self.r[i_1], i_2, self.r[i_2], i_3, self.r[i_3] });
+            std.debug.print("R{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\tR{}: 0x{X:0>8}\n", .{ i, self.r[i], i + 1, self.r[i + 1], i + 2, self.r[i + 2], i + 3, self.r[i + 3] });
         }
-        std.debug.print("cpsr: 0x{X:0>8} ", .{self.cpsr.raw});
-        prettyPrintPsr(&self.cpsr);
-
-        std.debug.print("spsr: 0x{X:0>8} ", .{self.spsr.raw});
-        prettyPrintPsr(&self.spsr);
-
+        std.debug.print("cpsr: 0x{X:0>8}\tspsr: 0x{X:0>8}\n", .{ self.cpsr.raw, self.spsr.raw });
         std.debug.print("tick: {}\n\n", .{self.sched.tick});
 
         std.debug.panic(format, args);
     }
 
-    fn prettyPrintPsr(psr: *const PSR) void {
+    fn prettyPrintPsr(psr: *PSR) void {
         std.debug.print("[", .{});
 
         if (psr.n.read()) std.debug.print("N", .{}) else std.debug.print("-", .{});
@@ -265,23 +257,11 @@ pub const Arm7tdmi = struct {
         if (psr.v.read()) std.debug.print("V", .{}) else std.debug.print("-", .{});
         if (psr.i.read()) std.debug.print("I", .{}) else std.debug.print("-", .{});
         if (psr.f.read()) std.debug.print("F", .{}) else std.debug.print("-", .{});
-        if (psr.t.read()) std.debug.print("T", .{}) else std.debug.print("-", .{});
+        if (psr.T.read()) std.debug.print("T", .{}) else std.debug.print("-", .{});
         std.debug.print("|", .{});
-        if (getMode(psr.mode.read())) |mode| std.debug.print("{s}", .{modeString(mode)}) else std.debug.print("---", .{});
+        if (getMode(psr.mode.read())) |mode| std.debug.print("{}", mode) else std.debug.print("---");
 
-        std.debug.print("]\n", .{});
-    }
-
-    fn modeString(mode: Mode) []const u8 {
-        return switch (mode) {
-            .User => "usr",
-            .Fiq => "fiq",
-            .Irq => "irq",
-            .Supervisor => "svc",
-            .Abort => "abt",
-            .Undefined => "und",
-            .System => "sys",
-        };
+        std.debug.print("]", .{});
     }
 
     fn skyLog(self: *const Self, file: *const File) !void {