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feat(cpu): implement thumb push / pop and stub format 13 thumb instrs

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-10-21 05:12:06 -03:00
parent a3d53d40fb
commit d6ed071bc6
3 changed files with 79 additions and 1 deletions
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17
src/cpu.zig
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@@ -20,13 +20,15 @@ const softwareInterrupt = @import("cpu/arm/software_interrupt.zig").softwareInte
// THUMB Instruction Groups
const format1 = @import("cpu/thumb/format1.zig").format1;
const format2 = @import("cpu/thumb/format2.zig").format2;
const format3 = @import("cpu/thumb/format3.zig").format3;
const format4 = @import("cpu/thumb/format4.zig").format4;
const format2 = @import("cpu/thumb/format2.zig").format2;
const format5 = @import("cpu/thumb/format5.zig").format5;
const format6 = @import("cpu/thumb/format6.zig").format6;
const format9 = @import("cpu/thumb/format9.zig").format9;
const format12 = @import("cpu/thumb/format12.zig").format12;
const format13 = @import("cpu/thumb/format13.zig").format13;
const format14 = @import("cpu/thumb/format14.zig").format14;
const format15 = @import("cpu/thumb/format15.zig").format15;
const format16 = @import("cpu/thumb/format16.zig").format16;
const format19 = @import("cpu/thumb/format19.zig").format19;
@@ -385,6 +387,19 @@ fn thumbPopulate() [0x400]ThumbInstrFn {
lut[i] = format12(isSP, rd);
}
if (i >> 2 & 0xFF == 0xB0) {
const S = i >> 1 & 1 == 1;
lut[i] = format13(S);
}
if (i >> 6 & 0xF == 0b1011 and i >> 3 & 0x3 == 0b10) {
const L = i >> 11 & 1 == 1;
const R = i >> 8 & 1 == 1;
lut[i] = format14(L, R);
}
if (i >> 6 & 0xF == 0b1100) {
const L = i >> 5 & 1 == 1;
const rb = i >> 2 & 0x3;