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feat: move thumb instr decoding to module

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-07-27 13:10:58 -03:00
parent 53191b0eeb
commit 9d037fdc3e
8 changed files with 169 additions and 186 deletions
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12
src/core/cpu/thumb/data_transfer.zig
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@@ -2,11 +2,11 @@ const std = @import("std");
const Bus = @import("../../Bus.zig");
const Arm7tdmi = @import("../../cpu.zig").Arm7tdmi;
const InstrFn = @import("../../cpu.zig").ThumbInstrFn;
const InstrFn = @import("../../cpu.zig").thumb.InstrFn;
const rotr = @import("../../util.zig").rotr;
pub fn format6(comptime rd: u3) InstrFn {
pub fn fmt6(comptime rd: u3) InstrFn {
return struct {
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
// LDR
@@ -18,7 +18,7 @@ pub fn format6(comptime rd: u3) InstrFn {
const sext = @import("../../util.zig").sext;
pub fn format78(comptime op: u2, comptime T: bool) InstrFn {
pub fn fmt78(comptime op: u2, comptime T: bool) InstrFn {
return struct {
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
const ro = opcode >> 6 & 0x7;
@@ -78,7 +78,7 @@ pub fn format78(comptime op: u2, comptime T: bool) InstrFn {
}.inner;
}
pub fn format9(comptime B: bool, comptime L: bool, comptime offset: u5) InstrFn {
pub fn fmt9(comptime B: bool, comptime L: bool, comptime offset: u5) InstrFn {
return struct {
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
const rb = opcode >> 3 & 0x7;
@@ -110,7 +110,7 @@ pub fn format9(comptime B: bool, comptime L: bool, comptime offset: u5) InstrFn
}.inner;
}
pub fn format10(comptime L: bool, comptime offset: u5) InstrFn {
pub fn fmt10(comptime L: bool, comptime offset: u5) InstrFn {
return struct {
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
const rb = opcode >> 3 & 0x7;
@@ -130,7 +130,7 @@ pub fn format10(comptime L: bool, comptime offset: u5) InstrFn {
}.inner;
}
pub fn format11(comptime L: bool, comptime rd: u3) InstrFn {
pub fn fmt11(comptime L: bool, comptime rd: u3) InstrFn {
return struct {
fn inner(cpu: *Arm7tdmi, bus: *Bus, opcode: u16) void {
const offset = (opcode & 0xFF) << 2;