tmp: add cpu info

src/core/cpu.zig

@@ -647,7 +647,7 @@ pub const PSR = extern union {
     }
 };
 
-const Mode = enum(u5) {
+pub const Mode = enum(u5) {
     User = 0b10000,
     Fiq = 0b10001,
     Irq = 0b10010,
@@ -656,7 +656,7 @@ const Mode = enum(u5) {
     Undefined = 0b11011,
     System = 0b11111,
 
-    fn toString(self: Mode) []const u8 {
+    pub fn toString(self: Mode) []const u8 {
         return switch (self) {
             .User => "usr",
             .Fiq => "fiq",

src/platform.zig

@@ -260,25 +260,156 @@ pub const Gui = struct {
     }
 
     fn draw(self: *Self, tex_id: GLuint, cpu: *const Arm7tdmi) void {
-        _ = cpu;
+        const Mode = @import("core/cpu.zig").Mode;
         const win_scale = config.config().host.win_scale;
 
         {
+            const w = @intToFloat(f32, gba_width * win_scale);
+            const h = @intToFloat(f32, gba_height * win_scale);
+
             _ = zgui.begin("Game Boy Advance Screen", .{ .flags = .{ .no_resize = true, .always_auto_resize = true } });
             defer zgui.end();
 
-            const img_args = .{
+            zgui.image(@intToPtr(*anyopaque, tex_id), .{ .w = w, .h = h, .uv0 = .{ 0, 1 }, .uv1 = .{ 1, 0 } });
-                .w = @intToFloat(f32, gba_width * win_scale),
-                .h = @intToFloat(f32, gba_height * win_scale),
-                .uv0 = .{ 0.0, 1.0 },
-                .uv1 = .{ 1.0, 0.0 },
-            };
-
-            zgui.image(@intToPtr(*anyopaque, tex_id), img_args);
         }
 
         {
-            _ = zgui.begin("Emulator Performance", .{});
+            _ = zgui.begin("Information", .{});
+            defer zgui.end();
+
+            {
+                var i: usize = 0;
+                while (i < 8) : (i += 1) {
+                    zgui.text("R{}: 0x{X:0>8}", .{ i, cpu.r[i] });
+
+                    zgui.sameLine(.{});
+
+                    const prefix = if (8 + i < 10) " " else "";
+                    zgui.text("{s}R{}: 0x{X:0>8}", .{ prefix, 8 + i, cpu.r[8 + i] });
+                }
+            }
+
+            zgui.separator();
+
+            {
+                const maybe_mode = std.meta.intToEnum(Mode, cpu.cpsr.mode.read()) catch null;
+                const mode = if (maybe_mode) |mode| mode.toString() else "???";
+                const w = 9.0;
+                const h = 15.0;
+
+                zgui.text("CPSR: 0x{X:0>8}", .{cpu.cpsr.raw});
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("N", .{ .w = w, .h = h, .selected = cpu.cpsr.n.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("Z", .{ .w = w, .h = h, .selected = cpu.cpsr.z.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("C", .{ .w = w, .h = h, .selected = cpu.cpsr.c.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("V", .{ .w = w, .h = h, .selected = cpu.cpsr.v.read() });
+
+                zgui.sameLine(.{});
+                zgui.text("{s}", .{mode});
+            }
+
+            {
+                const maybe_mode = std.meta.intToEnum(Mode, cpu.spsr.mode.read()) catch null;
+                const mode = if (maybe_mode) |mode| mode.toString() else "???";
+                const w = 9.0;
+                const h = 15.0;
+
+                zgui.text("SPSR: 0x{X:0>8}", .{cpu.spsr.raw});
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("N", .{ .w = w, .h = h, .selected = cpu.spsr.n.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("Z", .{ .w = w, .h = h, .selected = cpu.spsr.z.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("C", .{ .w = w, .h = h, .selected = cpu.spsr.c.read() });
+
+                zgui.sameLine(.{});
+                _ = zgui.selectable("V", .{ .w = w, .h = h, .selected = cpu.spsr.v.read() });
+
+                zgui.sameLine(.{});
+                zgui.text("{s}", .{mode});
+            }
+
+            {
+                // const ime = cpu.bus.io.ime;
+                const ir = cpu.bus.io.ie;
+                // const ie = cpu.bus.io.ie;
+                const h = 15.0;
+                const w = 9.0;
+                const ww = 9.0 * 2 + 3.5;
+
+                {
+                    zgui.text("IRQ", .{});
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("VBL", .{ .w = ww, .h = h, .selected = ir.vblank.read() });
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("HBL", .{ .w = ww, .h = h, .selected = ir.hblank.read() });
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("VCT", .{ .w = ww, .h = h, .selected = ir.coincidence.read() });
+
+                    {
+                        zgui.sameLine(.{});
+                        _ = zgui.text("T", .{});
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("0", .{ .w = w, .h = h, .selected = ir.tm0_overflow.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("1", .{ .w = w, .h = h, .selected = ir.tm1_overflow.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("2", .{ .w = w, .h = h, .selected = ir.tm2_overflow.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("3", .{ .w = w, .h = h, .selected = ir.tm3_overflow.read() });
+                    }
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("SRL", .{ .w = ww, .h = h, .selected = ir.serial.read() });
+
+                    {
+                        zgui.sameLine(.{});
+                        _ = zgui.text("DMA", .{});
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("0", .{ .w = w, .h = h, .selected = ir.dma0.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("1", .{ .w = w, .h = h, .selected = ir.dma1.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("2", .{ .w = w, .h = h, .selected = ir.dma2.read() });
+
+                        zgui.sameLine(.{});
+                        _ = zgui.selectable("3", .{ .w = w, .h = h, .selected = ir.dma3.read() });
+                    }
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("KPD", .{ .w = ww, .h = h, .selected = ir.keypad.read() });
+
+                    zgui.sameLine(.{});
+                    _ = zgui.selectable("GPK", .{ .w = ww, .h = h, .selected = ir.game_pak.read() });
+                }
+            }
+        }
+
+        zgui.separator();
+
+        {
+            _ = zgui.begin("Performance", .{});
+            defer zgui.end();
 
             const tmp = blk: {
                 var buf: [0x400]u32 = undefined;
@@ -307,6 +438,8 @@ pub const Gui = struct {
             const x_args = .{ .flags = .{ .no_grid_lines = true, .no_tick_labels = true, .no_tick_marks = true } };
 
             if (zgui.plot.beginPlot("Emulation FPS", .{ .w = 0.0, .flags = .{ .no_title = true, .no_frame = true } })) {
+                defer zgui.plot.endPlot();
+
                 zgui.plot.setupLegend(.{ .north = true, .east = true }, .{});
                 zgui.plot.setupAxis(.x1, x_args);
                 zgui.plot.setupAxis(.y1, y_args);
@@ -315,7 +448,6 @@ pub const Gui = struct {
                 zgui.plot.setupFinish();
 
                 zgui.plot.plotLineValues("FPS", u32, .{ .v = values[0..len] });
-                zgui.plot.endPlot();
             }
 
             const stats: struct { u32, u32, u32 } = blk: {
@@ -336,8 +468,6 @@ pub const Gui = struct {
             zgui.text("Average: {:0>3} fps", .{stats[0]});
             zgui.text(" Median: {:0>3} fps", .{stats[1]});
             zgui.text(" 1% Low: {:0>3} fps", .{stats[2]});
-
-            defer zgui.end();
         }
 
         {