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Add support for Motorola 88K to s_lock.h.

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Apparently there are still people out there who care about this old
architecture.  They probably care about dusty versions of Postgres
too, so back-patch to all supported branches.

David Carlier (from a patch being carried by OpenBSD packagers)

Discussion: https://postgr.es/m/CA+XhMqzwFSGVU7MEnfhCecc8YdP98tigXzzpd0AAdwaGwaVXEA@mail.gmail.com
This commit is contained in:
Tom Lane
2017-11-20 17:57:46 -05:00
parent c4adfc21cb
commit 1ecf7eeb87
1 changed files with 24 additions and 0 deletions
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24
src/include/storage/s_lock.h
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@@ -543,6 +543,30 @@ tas(volatile slock_t *lock)
#endif /* (__mc68000__ || __m68k__) && __linux__ */
/* Motorola 88k */
#if defined(__m88k__)
#define HAS_TEST_AND_SET
typedef unsigned int slock_t;
#define TAS(lock) tas(lock)
static __inline__ int
tas(volatile slock_t *lock)
{
register slock_t _res = 1;
__asm__ __volatile__(
" xmem %0, %2, %%r0 \n"
: "+r"(_res), "+m"(*lock)
: "r"(lock)
: "memory");
return (int) _res;
}
#endif /* __m88k__ */
/*
* VAXen -- even multiprocessor ones
* (thanks to Tom Ivar Helbekkmo)