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chore: add mgba compatible (minus disasm) log function

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-01-04 01:11:53 -06:00
parent 0f827fca96
commit 8d8cedea59
1 changed files with 29 additions and 0 deletions
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29
src/cpu.zig
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@ -44,6 +44,8 @@ pub const Arm7tdmi = struct {
pub inline fn step(self: *@This()) u64 { pub inline fn step(self: *@This()) u64 {
const opcode = self.fetch(); const opcode = self.fetch();
self.mgbaLog(opcode);
if (checkCond(&self.cpsr, opcode)) arm_lut[armIdx(opcode)](self, self.bus, opcode); if (checkCond(&self.cpsr, opcode)) arm_lut[armIdx(opcode)](self, self.bus, opcode);
return 1; return 1;
} }
@ -57,6 +59,33 @@ pub const Arm7tdmi = struct {
fn fakePC(self: *const @This()) u32 { fn fakePC(self: *const @This()) u32 {
return self.r[15] + 4; return self.r[15] + 4;
} }
fn mgbaLog(self: *const @This(), opcode: u32) void {
const stderr = std.io.getStdErr().writer();
std.debug.getStderrMutex().lock();
defer std.debug.getStderrMutex().unlock();
const r0 = self.r[0];
const r1 = self.r[1];
const r2 = self.r[2];
const r3 = self.r[3];
const r4 = self.r[4];
const r5 = self.r[5];
const r6 = self.r[6];
const r7 = self.r[7];
const r8 = self.r[8];
const r9 = self.r[9];
const r10 = self.r[10];
const r11 = self.r[11];
const r12 = self.r[12];
const r13 = self.r[13];
const r14 = self.r[14];
const r15 = self.r[15];
const cpsr = self.cpsr.raw;
nosuspend stderr.print("{X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} {X:0>8} cpsr: {X:0>8} | {X:0>8}:\n", .{ r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, cpsr, opcode }) catch return;
}
}; };
fn armIdx(opcode: u32) u12 { fn armIdx(opcode: u32) u12 {