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Bugzilla bug 151709: implemented atomic operations in assembly on Alpha

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Linux.  The patch is contributed by falk@debian.org. r=darin,wtc.


git-svn-id: svn://10.0.0.236/trunk@166333 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
wchang0222%aol.com
2004-12-06 20:02:09 +00:00
parent ad0f0a0bab
commit bbbcbc67db
1 changed files with 56 additions and 0 deletions
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56
mozilla/nsprpub/pr/include/md/_linux.h
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@@ -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