Rekai Musuka
af10c1b076
While bugs do exist, at this point all THUMB and ARMv4 instructions have been implemented! Yay!
15 lines
450 B
Zig
15 lines
450 B
Zig
const std = @import("std");
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const Bus = @import("../../Bus.zig");
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const Arm7tdmi = @import("../../cpu.zig").Arm7tdmi;
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const InstrFn = @import("../../cpu.zig").ThumbInstrFn;
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pub fn format13(comptime S: bool) InstrFn {
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return struct {
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fn inner(cpu: *Arm7tdmi, _: *Bus, opcode: u16) void {
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const offset = (opcode & 0x7F) << 2;
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cpu.r[13] = if (S) cpu.r[13] - offset else cpu.r[13] + offset;
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}
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}.inner;
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}
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