diff options
| author | adventuresin9 <adventuresin9@gmail.com> | 2023-03-08 05:14:31 +0000 |
|---|---|---|
| committer | adventuresin9 <adventuresin9@gmail.com> | 2023-03-08 05:14:31 +0000 |
| commit | b68eeefef34d4a742124d922e2a23613b9bcb1e5 (patch) | |
| tree | 5d23922732e9c0a756a8cbaa650c211fa5ac8fc5 /sys/src/libc | |
| parent | 6fe654f50c536a61c94a43ce2fcb147625da1d09 (diff) | |
sys/src/libc/mips/tas.s: _tas() for spim
Diffstat (limited to 'sys/src/libc')
| -rw-r--r-- | sys/src/libc/spim/tas.s | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/src/libc/spim/tas.s b/sys/src/libc/spim/tas.s new file mode 100644 index 000000000..807fd121d --- /dev/null +++ b/sys/src/libc/spim/tas.s @@ -0,0 +1,18 @@ +/* + * 4K tas for spim + */ + +#define LL(base, rt) WORD $((060<<26)|((base)<<21)|((rt)<<16)) +#define SC(base, rt) WORD $((070<<26)|((base)<<21)|((rt)<<16)) +#define NOOP WORD $0x27 + + TEXT _tas(SB), $0 + MOVW R1, R2 /* address of key */ +tas1: + MOVW $1, R3 + LL(2, 1) + NOOP + SC(2, 3) + NOOP + BEQ R3, tas1 + RET |