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39 /* -------------------------------------------------------------- */
40 /* PROLOG END TAG zYx */
41 #ifndef _SPU_COND_WAIT_H_
42 #define _SPU_COND_WAIT_H_
45 #include "sync_utils.h"
46 #include "mutex_lock.h"
47 #include "mutex_unlock.h"
49 #include <spu_mfcio.h>
51 static __inline void _cond_wait (cond_ea_t cond, mutex_ea_t mutex)
54 char *tmp = (char *) ALIGN(_tmp, 128);
55 volatile signed short *buf = (volatile signed short *) &tmp[0];
56 unsigned int size = 128, tagid = 0;
60 signed short delta, cur_delta, signaled_cnt;
62 ea64.ull = ALIGN128_EA(cond);
63 offset = OFFSET128_EA_U16(cond);
65 /* increment the waiting halfword of the condition variable.
68 MFC_DMA(buf, ea64, size, tagid, MFC_GETLLAR_CMD);
69 (void)spu_readch(MFC_RdAtomicStat);
73 MFC_DMA(buf, ea64, size, tagid, MFC_PUTLLC_CMD);
74 status = spu_readch(MFC_RdAtomicStat);
79 /* keep track of the change in count needed to be signaled. This
82 signaled_cnt = buf[offset];
83 delta = buf[offset+1] - signaled_cnt;
84 if (delta < 0) delta = -delta;
87 MFC_DMA(buf, ea64, size, tagid, MFC_GETLLAR_CMD);
88 (void)spu_readch(MFC_RdAtomicStat);
90 cur_delta = buf[offset] - signaled_cnt;
91 if (cur_delta < 0) cur_delta = -cur_delta;
94 if (cur_delta >= delta) {
95 /* the counts indicate that this thread has been signaled.
103 #endif /* _SPU_COND_WAIT_H_ */