Hi,
barrier.h defines memory barriers for x86 as:
32bit:
#define pg_memory_barrier() \
__asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
64bit:
#define pg_memory_barrier() \
__asm__ __volatile__ ("lock; addl $0,0(%%rsp)" : : : "memory")
But addl sets condition flags. So this really also needs a "cc" clobber?
Or am I missing something?
Greetings,
Andres Freund
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Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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