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feat(cpu): implement LDM/STM

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-01-10 06:27:36 -04:00
parent 6c0651ca08
commit 7d79a0bee2
2 changed files with 66 additions and 0 deletions
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11
src/cpu.zig
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@@ -10,6 +10,7 @@ const Scheduler = @import("scheduler.zig").Scheduler;
const dataProcessing = @import("cpu/data_processing.zig").dataProcessing;
const singleDataTransfer = @import("cpu/single_data_transfer.zig").singleDataTransfer;
const halfAndSignedDataTransfer = @import("cpu/half_signed_data_transfer.zig").halfAndSignedDataTransfer;
const blockDataTransfer = @import("cpu/block_data_transfer.zig").blockDataTransfer;
const branch = @import("cpu/branch.zig").branch;
pub const InstrFn = fn (*Arm7tdmi, *Bus, u32) void;
@@ -153,6 +154,16 @@ fn populate() [0x1000]InstrFn {
lut[i] = singleDataTransfer(I, P, U, B, W, L);
}
if (i >> 9 & 0x7 == 0b100) {
const P = i >> 8 & 1 == 1;
const U = i >> 7 & 1 == 1;
const S = i >> 6 & 1 == 1;
const W = i >> 5 & 1 == 1;
const L = i >> 4 & 1 == 1;
lut[i] = blockDataTransfer(P, U, S, W, L);
}
if (i >> 9 & 0x7 == 0b101) {
const L = i >> 8 & 1 == 1;
lut[i] = branch(L);