feat(cpu): implement branch and exchange

If I want to continue with armwrestler, I'll have to implement THUMB instructions now
fix(cpu): make Data Processing instructions r15-aware
2022-01-12 07:20:24 -04:00 · 2022-01-12 07:20:24 -04:00 · 2022-01-12 07:20:21 -04:00
1 changed files with 1 additions and 1 deletions
--- a/src/cpu/half_signed_data_transfer.zig
+++ b/src/cpu/half_signed_data_transfer.zig
@ -39,7 +39,7 @@ pub fn halfAndSignedDataTransfer(comptime P: bool, comptime U: bool, comptime I:
                    },
                    0b01 => {
                        // LDRH
-                        const value = bus.read16(address & 0xFFFE);
+                        const value = bus.read16(address & 0xFFFF_FFFE);
                        cpu.r[rd] = std.math.rotr(u32, @as(u32, value), 8 * (address & 1));
                    },
                    0b10 => {
Author	SHA1	Message	Date
Rekai Musuka	77dba68a0b	feat(cpu): implement branch and exchange If I want to continue with armwrestler, I'll have to implement THUMB instructions now	2022-01-12 07:20:24 -04:00
Rekai Musuka	7adc7c8802	fix(cpu): make Data Processing instructions r15-aware	2022-01-12 07:20:24 -04:00
Rekai Musuka	229f7c3388	fix(cpu): make LDRH and STRH aware of r15	2022-01-12 07:20:21 -04:00