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feat(cpu): implement ARM multiply instructions

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-10-21 05:12:07 -03:00
parent 14d5160674
commit 0778ee8dd7
3 changed files with 37 additions and 1 deletions
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8
src/cpu.zig
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@@ -17,6 +17,7 @@ const blockDataTransfer = @import("cpu/arm/block_data_transfer.zig").blockDataTr
const branch = @import("cpu/arm/branch.zig").branch;
const branchAndExchange = @import("cpu/arm/branch.zig").branchAndExchange;
const softwareInterrupt = @import("cpu/arm/software_interrupt.zig").softwareInterrupt;
const multiply = @import("cpu/arm/multiply.zig").multiply;
// THUMB Instruction Groups
const format1 = @import("cpu/thumb/format1.zig").format1;
@@ -448,6 +449,13 @@ fn armPopulate() [0x1000]ArmInstrFn {
lut[i] = psrTransfer(I, R, kind);
}
if (i >> 6 & 0x3F == 0b000000 and i & 0xF == 0b1001) {
const A = i >> 5 & 1 == 1;
const S = i >> 4 & 1 == 1;
lut[i] = multiply(A, S);
}
if (i == 0x121) {
lut[i] = branchAndExchange;
}