diff options
| author | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
|---|---|---|
| committer | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
| commit | e5888a1ffdae813d7575f5fb02275c6bb07e5199 (patch) | |
| tree | d8d51eac403f07814b9e936eed0c9a79195e2450 /sys/src/cmd/unix/drawterm/posix-386/tas.c | |
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/cmd/unix/drawterm/posix-386/tas.c')
| -rwxr-xr-x | sys/src/cmd/unix/drawterm/posix-386/tas.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sys/src/cmd/unix/drawterm/posix-386/tas.c b/sys/src/cmd/unix/drawterm/posix-386/tas.c new file mode 100755 index 000000000..8a907d8dc --- /dev/null +++ b/sys/src/cmd/unix/drawterm/posix-386/tas.c @@ -0,0 +1,23 @@ +#include "u.h" +#include "libc.h" + +int +tas(long *x) +{ + int v; + + __asm__( "movl $1, %%eax\n\t" + "xchgl %%eax,(%%ecx)" + : "=a" (v) + : "c" (x) + ); + switch(v) { + case 0: + case 1: + return v; + default: + print("canlock: corrupted 0x%lux\n", v); + return 1; + } +} + |