diff options
| author | Charles.Forsyth <devnull@localhost> | 2006-12-22 17:07:39 +0000 |
|---|---|---|
| committer | Charles.Forsyth <devnull@localhost> | 2006-12-22 17:07:39 +0000 |
| commit | 37da2899f40661e3e9631e497da8dc59b971cbd0 (patch) | |
| tree | cbc6d4680e347d906f5fa7fca73214418741df72 /lib9/lock-Irix-mips.s | |
| parent | 54bc8ff236ac10b3eaa928fd6bcfc0cdb2ba46ae (diff) | |
20060303a
Diffstat (limited to 'lib9/lock-Irix-mips.s')
| -rw-r--r-- | lib9/lock-Irix-mips.s | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib9/lock-Irix-mips.s b/lib9/lock-Irix-mips.s new file mode 100644 index 00000000..40606e93 --- /dev/null +++ b/lib9/lock-Irix-mips.s @@ -0,0 +1,19 @@ +#include <sys/regdef.h> +#include <sys/asm.h> + +/* + * lock from r4000 book + */ +LEAF(canlock) + .set noreorder +1: + ll t0,0(a0) /* a0 is argument */ + or t1, t0, 1 + sc t1,0(a0) + beq t1,zero,1b + nop + j $31 /* lock held */ + xor v0, t0, 1 + + .set reorder + END(canlock) |