paoda/zba
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

feat(cpu): Implement Multiply Long ARM instructions

Browse Source
This commit is contained in:
Rekai Nyangadzayi Musuka
2022-10-21 05:12:09 -03:00
parent e0e43eece5
commit da681c946e
2 changed files with 47 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/cpu.zig
View File

@@ -18,6 +18,7 @@ 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;
const multiplyLong = @import("cpu/arm/multiply_long.zig").multiplyLong;
// THUMB Instruction Groups
const format1 = @import("cpu/thumb/format1.zig").format1;
@@ -533,6 +534,14 @@ fn armPopulate() [0x1000]ArmInstrFn {
lut[i] = multiply(A, S);
}
if (i >> 7 & 0x1F == 0b00001 and i & 0xF == 0b1001) {
const U = i >> 6 & 1 == 1;
const A = i >> 5 & 1 == 1;
const S = i >> 4 & 1 == 1;
lut[i] = multiplyLong(U, A, S);
}
if (i >> 10 & 0x3 == 0b01) {
const I = i >> 9 & 1 == 1;
const P = i >> 8 & 1 == 1;