Imported Upstream version 3.2.2

[debian/gnuradio] / gcell / ibm / sync / spu_source / cond_wait.h

diff --git a/gcell/ibm/sync/spu_source/cond_wait.h b/gcell/ibm/sync/spu_source/cond_wait.h
new file mode 100644 (file)
index 0000000..cf4b880
--- /dev/null
+++ b/gcell/ibm/sync/spu_source/cond_wait.h
@@ -0,0 +1,103 @@
+/* --------------------------------------------------------------  */
+/* (C)Copyright 2001,2007,                                         */
+/* International Business Machines Corporation,                    */
+/* Sony Computer Entertainment, Incorporated,                      */
+/* Toshiba Corporation,                                            */
+/*                                                                 */
+/* All Rights Reserved.                                            */
+/*                                                                 */
+/* Redistribution and use in source and binary forms, with or      */
+/* without modification, are permitted provided that the           */
+/* following conditions are met:                                   */
+/*                                                                 */
+/* - Redistributions of source code must retain the above copyright*/
+/*   notice, this list of conditions and the following disclaimer. */
+/*                                                                 */
+/* - Redistributions in binary form must reproduce the above       */
+/*   copyright notice, this list of conditions and the following   */
+/*   disclaimer in the documentation and/or other materials        */
+/*   provided with the distribution.                               */
+/*                                                                 */
+/* - Neither the name of IBM Corporation nor the names of its      */
+/*   contributors may be used to endorse or promote products       */
+/*   derived from this software without specific prior written     */
+/*   permission.                                                   */
+/*                                                                 */
+/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND          */
+/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,     */
+/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF        */
+/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE        */
+/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR            */
+/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,    */
+/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT    */
+/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;    */
+/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)        */
+/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN       */
+/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR    */
+/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  */
+/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              */
+/* --------------------------------------------------------------  */
+/* PROLOG END TAG zYx                                              */
+#ifndef _SPU_COND_WAIT_H_
+#define _SPU_COND_WAIT_H_
+#include <stdio.h>
+#include "sync_irq.h"
+#include "sync_utils.h"
+#include "mutex_lock.h"
+#include "mutex_unlock.h"
+#include "cond.h"
+#include <spu_mfcio.h>
+
+static __inline void _cond_wait (cond_ea_t cond, mutex_ea_t  mutex)
+{
+    char _tmp[256];                                     
+    char *tmp = (char *) ALIGN(_tmp, 128);              
+    volatile signed short *buf = (volatile signed short *) &tmp[0];       
+    unsigned int size = 128, tagid = 0;                          
+    int status;                                
+    unsigned int offset;                                         
+    addr64 ea64;  
+    signed short delta, cur_delta, signaled_cnt;
+
+    ea64.ull = ALIGN128_EA(cond);
+    offset = OFFSET128_EA_U16(cond);
+
+    /* increment the waiting halfword of the condition variable.
+     */
+    do {
+      MFC_DMA(buf, ea64, size, tagid, MFC_GETLLAR_CMD);
+      (void)spu_readch(MFC_RdAtomicStat);
+
+      buf[offset+1]++;
+      
+      MFC_DMA(buf, ea64, size, tagid, MFC_PUTLLC_CMD);
+      status = spu_readch(MFC_RdAtomicStat); 
+    } while (status);
+
+    _mutex_unlock(mutex);
+
+    /* keep track of the change in count needed to be signaled. This 
+     * is delta.
+     */
+    signaled_cnt = buf[offset];
+    delta = buf[offset+1] - signaled_cnt;
+    if (delta < 0) delta = -delta;
+
+    while (1) {
+      MFC_DMA(buf, ea64, size, tagid, MFC_GETLLAR_CMD);
+      (void)spu_readch(MFC_RdAtomicStat);
+
+      cur_delta = buf[offset] - signaled_cnt;
+      if (cur_delta < 0) cur_delta = -cur_delta;
+
+
+      if (cur_delta >= delta) {
+       /* the counts indicate that this thread has been signaled.
+        */
+       break;
+      } 
+    } 
+    _mutex_lock (mutex);
+}
+
+#endif /* _SPU_COND_WAIT_H_ */