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feat(cpu): implement THUMB format 9 loads / stores

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-10-21 05:12:06 -03:00
parent a17dfbe41f
commit a3d53d40fb
2 changed files with 45 additions and 0 deletions
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9
src/cpu.zig
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@@ -25,6 +25,7 @@ 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 format15 = @import("cpu/thumb/format15.zig").format15;
const format16 = @import("cpu/thumb/format16.zig").format16;
@@ -369,6 +370,14 @@ fn thumbPopulate() [0x400]ThumbInstrFn {
lut[i] = format6(rd);
}
if (i >> 7 & 0x7 == 0b011) {
const B = i >> 6 & 1 == 1;
const L = i >> 5 & 1 == 1;
const offset = i & 0x1F;
lut[i] = format9(B, L, offset);
}
if (i >> 6 & 0xF == 0b1010) {
const isSP = i >> 5 & 1 == 1;
const rd = i >> 2 & 0x7;