diff options
| author | Alejandro Soto <alejandro@34project.org> | 2022-11-07 13:30:03 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2022-11-07 13:31:57 -0600 |
| commit | bf8bd4a00f1cdfc93b2f702f5f87918e66a2e361 (patch) | |
| tree | 936ed1d54cb117a51fe66b972f6a76869c4be2ac /tb/sim/modeswitch.S | |
| parent | 0907d94bf1e71c5ec697db53933abc462e703c35 (diff) | |
Add test sim: modeswitch
Diffstat (limited to 'tb/sim/modeswitch.S')
| -rw-r--r-- | tb/sim/modeswitch.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tb/sim/modeswitch.S b/tb/sim/modeswitch.S new file mode 100644 index 0000000..c04f8a3 --- /dev/null +++ b/tb/sim/modeswitch.S @@ -0,0 +1,21 @@ +.global reset +reset: + mrs r0, cpsr + udf + mrs r2, cpsr + ldr r3, =#0x16f + bic r3, r2, r3 + msr cpsr_fxc, r3 + mrs r4, cpsr + cmp r0, r0 + mrs r5, spsr + nop + msr cpsr_fxc, r0 + msr spsr_fxc, r0 + mov pc, lr + +.global undefined +undefined: + mrs r1, spsr + mrs r13, cpsr + movs pc, lr |