Initial Commit - Lesson 31 (Commit #1)

Plugins/GameLiftServerSDK/ThirdParty/concurrentqueue/benchmarks/tbb/ia64-gas/lock_byte.s

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+// Copyright 2005-2014 Intel Corporation.  All Rights Reserved.
+//
+// This file is part of Threading Building Blocks. Threading Building Blocks is free software;
+// you can redistribute it and/or modify it under the terms of the GNU General Public License
+// version 2  as  published  by  the  Free Software Foundation.  Threading Building Blocks is
+// distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
+// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See  the GNU General Public License for more details.   You should have received a copy of
+// the  GNU General Public License along with Threading Building Blocks; if not, write to the
+// Free Software Foundation, Inc.,  51 Franklin St,  Fifth Floor,  Boston,  MA 02110-1301 USA
+//
+// As a special exception,  you may use this file  as part of a free software library without
+// restriction.  Specifically,  if other files instantiate templates  or use macros or inline
+// functions from this file, or you compile this file and link it with other files to produce
+// an executable,  this file does not by itself cause the resulting executable to be covered
+// by the GNU General Public License. This exception does not however invalidate any other
+// reasons why the executable file might be covered by the GNU General Public License.
+
+	// Support for class TinyLock
+	.section .text
+	.align 16
+	// unsigned int __TBB_machine_trylockbyte( byte& flag );
+	// r32 = address of flag 
+	.proc  __TBB_machine_trylockbyte#
+	.global __TBB_machine_trylockbyte#
+ADDRESS_OF_FLAG=r32
+RETCODE=r8
+FLAG=r9
+BUSY=r10
+SCRATCH=r11
+__TBB_machine_trylockbyte:
+        ld1.acq FLAG=[ADDRESS_OF_FLAG]
+        mov BUSY=1
+        mov RETCODE=0
+;;
+        cmp.ne p6,p0=0,FLAG
+        mov ar.ccv=r0
+(p6)    br.ret.sptk.many b0
+;;
+        cmpxchg1.acq SCRATCH=[ADDRESS_OF_FLAG],BUSY,ar.ccv  // Try to acquire lock
+;;
+        cmp.eq p6,p0=0,SCRATCH
+;;
+(p6)    mov RETCODE=1
+   	br.ret.sptk.many b0	
+	.endp __TBB_machine_trylockbyte#