| // Copyright 2024 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "textflag.h" |
| |
| TEXT ·EnableDIT(SB),$0-1 |
| MRS DIT, R0 |
| UBFX $24, R0, $1, R1 |
| MOVB R1, ret+0(FP) |
| MSR $1, DIT |
| // TODO(roland): the SB instruction is significantly more |
| // performant when available. We should detect its availability |
| // and use it when we can. |
| DSB $7 // nsh |
| ISB $15 // sy |
| RET |
| |
| TEXT ·DITEnabled(SB),$0-1 |
| MRS DIT, R0 |
| UBFX $24, R0, $1, R1 |
| MOVB R1, ret+0(FP) |
| RET |
| |
| TEXT ·DisableDIT(SB),$0 |
| MSR $0, DIT |
| RET |
