diff options
Diffstat (limited to 'mdk-stage1/dietlibc/alpha/__testandset.S')
| -rw-r--r-- | mdk-stage1/dietlibc/alpha/__testandset.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/alpha/__testandset.S b/mdk-stage1/dietlibc/alpha/__testandset.S new file mode 100644 index 000000000..c5ef81241 --- /dev/null +++ b/mdk-stage1/dietlibc/alpha/__testandset.S @@ -0,0 +1,11 @@ +.text +.align 2 +.global __testandsets +.type __testandsets,@function +__testandset: + ldq_l $0, 0($16) /* load lock */ + bne $0,1f /* ok there is a lock... */ + lda $0, 1($31) /* load a 1 to register 0 */ + stq_c $0, 0($16) /* write lock is locked :) */ + beq $0,__testandset /* oops someone changed MY lock */ +1: ret $31, ($26), 0x01 /* return */ |