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feat(cpu): implement format 6 THUMB instructions

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-01-29 01:17:11 -04:00
parent 95efb3f35d
commit cfbd292edc
2 changed files with 23 additions and 0 deletions
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7
src/cpu.zig
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@@ -22,6 +22,7 @@ const softwareInterrupt = @import("cpu/arm/software_interrupt.zig").softwareInte
// THUMB Instruction Groups
const format3 = @import("cpu/thumb/format3.zig").format3;
const format5 = @import("cpu/thumb/format5.zig").format5;
const format6 = @import("cpu/thumb/format6.zig").format6;
const format12 = @import("cpu/thumb/format12.zig").format12;
pub const ArmInstrFn = fn (*Arm7tdmi, *Bus, u32) void;
@@ -330,6 +331,12 @@ fn thumbPopulate() [0x400]ThumbInstrFn {
lut[i] = format5(op, h1, h2);
}
if (i >> 5 & 0x1F == 0b01001) {
const rd = i >> 2 & 0x7;
lut[i] = format6(rd);
}
if (i >> 6 & 0xF == 0b1010) {
const isSP = i >> 5 & 1 == 1;
const rd = i >> 2 & 0x7;