spinlock code for ns32k (again)

Applied.

Here's the new diff for getting the NS32K assembly code into the
spin-locks. Notice that it's now inline assembler in s_lock.h,
rather than seperate code in s_lock.c. It also shrank a little
bit... Just rip out the S_LOCK() define and insert the tas() inline
function. Please let me know if there are any problems with it.

Jon Buller

Index: src/include/storage/s_lock.h
===================================================================
RCS file: /usr/local/cvsroot/pgsql/src/include/storage/s_lock.h,v
retrieving revision 1.50
diff -r1.50 s_lock.h
170a171,186

#if defined(NEED_NS32K_TAS_ASM)
#define TAS(lock) tas(lock)

static __inline__ int
tas(volatile slock_t *lock)
{
register _res;
__asm__("sbitb 0, %0
sfsd %1"
: "=m"(*lock), "=r"(_res));
return (int) _res;
}

#endif /* NEED_NS32K_TAS_ASM */

214,231d229
<
<
<
< #if defined(NEED_NS32K_TAS_ASM)
<
< #define S_LOCK(lock) \
< { \
< slock_t res = 1; \
< while (res) { \
< __asm__("movqd 0, r0"); \
< __asm__("sbitd r0, %0" : "=m"(*lock)); \
< __asm__("sprb us, %0" : "=r" (res)); \
< res = ((res >> 5) & 1); \
< } \
< }
<
< #endif /* NEED_NS32K_TAS_ASM */
<

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