2 * @(#)parisc.gcc 8.8 (Sleepycat) 6/2/98
4 * Copyright (c) 1996-1997, The University of Utah and the Computer Systems
5 * Laboratory at the University of Utah (CSL). All rights reserved.
7 * Permission to use, copy, modify and distribute this software is hereby
8 * granted provided that (1) source code retains these copyright, permission,
9 * and disclaimer notices, and (2) redistributions including binaries
10 * reproduce the notices in supporting documentation, and (3) all advertising
11 * materials mentioning features or use of this software display the following
12 * acknowledgement: ``This product includes software developed by the Computer
13 * Systems Laboratory at the University of Utah.''
15 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
16 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
17 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
20 * improvements that they make and grant CSL redistribution rights.
24 * The PA-RISC has a "load and clear" instead of a "test and set" instruction.
25 * The 32-bit word used by that instruction must be 16-byte aligned. We could
26 * use the "aligned" attribute in GCC but that doesn't work for stack variables.
28 #define TSL_SET(tsl) ({ \
29 register tsl_t *__l = (tsl); \
31 asm volatile("ldcws 0(%1),%0" : "=r" (__r) : "r" (__l)); \
35 #define TSL_UNSET(tsl) (*(tsl) = -1)
36 #define TSL_INIT(tsl) TSL_UNSET(tsl)