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| author | wchang0222%aol.com <devnull@localhost> | 2004-12-06 20:04:13 +0000 |
|---|---|---|
| committer | wchang0222%aol.com <devnull@localhost> | 2004-12-06 20:04:13 +0000 |
| commit | 68a8de9df4681829abce4ceeaf8541ca5ebd6fa4 (patch) | |
| tree | 291f15d2d888dde4c8fe1eade40a399d91b8b03c | |
| parent | e71c29daff662ff57555f42973aedf2d75645973 (diff) | |
| download | nspr-hg-68a8de9df4681829abce4ceeaf8541ca5ebd6fa4.tar.gz | |
Bugzilla bug 151709: implemented atomic operations in assembly on Alpha
Linux. The patch is contributed by falk@debian.org. r=darin,wtc.
Tag: NSPRPUB_PRE_4_2_CLIENT_BRANCH
| -rw-r--r-- | pr/include/md/_linux.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/pr/include/md/_linux.h b/pr/include/md/_linux.h index 68a9265f..66e0ccf4 100644 --- a/pr/include/md/_linux.h +++ b/pr/include/md/_linux.h @@ -127,6 +127,62 @@ extern PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval); #define _MD_ATOMIC_SET _PR_x86_64_AtomicSet #endif +#if defined(__alpha) +#define _PR_HAVE_ATOMIC_OPS +#define _MD_INIT_ATOMIC() +#define _MD_ATOMIC_ADD(ptr, i) ({ \ + unsigned long __atomic_tmp, __atomic_ret; \ + __asm__ __volatile__( \ + "1: ldl_l %[ret], %[val] \n" \ + " addl %[ret], %[inc], %[tmp] \n" \ + " addl %[ret], %[inc], %[ret] \n" \ + " stl_c %[tmp], %[val] \n" \ + " beq %[tmp], 2f \n" \ + ".subsection 2 \n" \ + "2: br 1b \n" \ + ".previous" \ + : [ret] "=&r" (__atomic_ret), \ + [tmp] "=&r" (__atomic_tmp), \ + [val] "=m" (*ptr) \ + : [inc] "Ir" (i), "m" (*ptr)); \ + __atomic_ret; \ +}) +#define _MD_ATOMIC_INCREMENT(ptr) _MD_ATOMIC_ADD(ptr, 1) +#define _MD_ATOMIC_DECREMENT(ptr) ({ \ + unsigned long __atomic_tmp, __atomic_ret; \ + __asm__ __volatile__( \ + "1: ldl_l %[ret], %[val] \n" \ + " subl %[ret], 1, %[tmp] \n" \ + " subl %[ret], 1, %[ret] \n" \ + " stl_c %[tmp], %[val] \n" \ + " beq %[tmp], 2f \n" \ + ".subsection 2 \n" \ + "2: br 1b \n" \ + ".previous" \ + : [ret] "=&r" (__atomic_ret), \ + [tmp] "=&r" (__atomic_tmp), \ + [val] "=m" (*ptr) \ + : "m" (*ptr)); \ + __atomic_ret; \ +}) +#define _MD_ATOMIC_SET(ptr, n) ({ \ + unsigned long __atomic_tmp, __atomic_ret; \ + __asm__ __volatile__( \ + "1: ldl_l %[ret], %[val] \n" \ + " mov %[newval], %[tmp] \n" \ + " stl_c %[tmp], %[val] \n" \ + " beq %[tmp], 2f \n" \ + ".subsection 2 \n" \ + "2: br 1b \n" \ + ".previous" \ + : [ret] "=&r" (__atomic_ret), \ + [tmp] "=&r"(__atomic_tmp), \ + [val] "=m" (*ptr) \ + : [newval] "Ir" (n), "m" (*ptr)); \ + __atomic_ret; \ +}) +#endif + #define USE_SETJMP #if defined(__GLIBC__) && __GLIBC__ >= 2 #define _PR_POLL_AVAILABLE |