17 lines
495 B
Zig
17 lines
495 B
Zig
const std = @import("std");
|
|
|
|
const Bus = @import("../../Bus.zig");
|
|
const Arm7tdmi = @import("../../cpu.zig").Arm7tdmi;
|
|
const InstrFn = @import("../../cpu.zig").ThumbInstrFn;
|
|
|
|
pub fn format6(comptime rd: u3) InstrFn {
|
|
return struct {
|
|
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
|
|
const offset = (opcode & 0xFF) << 2;
|
|
|
|
// FIXME: Should this overflow?
|
|
cpu.r[rd] = bus.read32((cpu.fakePC() & 0xFFFF_FFFC) + offset);
|
|
}
|
|
}.inner;
|
|
}
|