1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/src/md/unix/os_Irix.s Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,134 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * Atomically add a new element to the top of the stack
1.11 + *
1.12 + * usage : PR_StackPush(listp, elementp);
1.13 + * -----------------------
1.14 + */
1.15 +
1.16 +#include "md/_irix.h"
1.17 +#ifdef _PR_HAVE_ATOMIC_CAS
1.18 +
1.19 +#include <sys/asm.h>
1.20 +#include <sys/regdef.h>
1.21 +
1.22 +LEAF(PR_StackPush)
1.23 +
1.24 +retry_push:
1.25 +.set noreorder
1.26 + lw v0,0(a0)
1.27 + li t1,1
1.28 + beq v0,t1,retry_push
1.29 + move t0,a1
1.30 +
1.31 + ll v0,0(a0)
1.32 + beq v0,t1,retry_push
1.33 + nop
1.34 + sc t1,0(a0)
1.35 + beq t1,0,retry_push
1.36 + nop
1.37 + sw v0,0(a1)
1.38 + sync
1.39 + sw t0,0(a0)
1.40 + nop
1.41 + nop
1.42 + nop
1.43 + nop
1.44 + nop
1.45 + nop
1.46 + nop
1.47 + nop
1.48 + nop
1.49 + nop
1.50 + nop
1.51 + nop
1.52 + nop
1.53 + nop
1.54 + nop
1.55 + nop
1.56 + nop
1.57 + nop
1.58 + nop
1.59 + nop
1.60 + nop
1.61 + nop
1.62 + nop
1.63 + nop
1.64 + nop
1.65 + nop
1.66 + nop
1.67 + nop
1.68 + jr ra
1.69 + nop
1.70 +
1.71 +END(PR_StackPush)
1.72 +
1.73 +/*
1.74 + *
1.75 + * Atomically remove the element at the top of the stack
1.76 + *
1.77 + * usage : elemep = PR_StackPop(listp);
1.78 + *
1.79 + */
1.80 +
1.81 +LEAF(PR_StackPop)
1.82 +retry_pop:
1.83 +.set noreorder
1.84 +
1.85 +
1.86 + lw v0,0(a0)
1.87 + li t1,1
1.88 + beq v0,0,done
1.89 + nop
1.90 + beq v0,t1,retry_pop
1.91 + nop
1.92 +
1.93 + ll v0,0(a0)
1.94 + beq v0,0,done
1.95 + nop
1.96 + beq v0,t1,retry_pop
1.97 + nop
1.98 + sc t1,0(a0)
1.99 + beq t1,0,retry_pop
1.100 + nop
1.101 + lw t0,0(v0)
1.102 + sw t0,0(a0)
1.103 +done:
1.104 + nop
1.105 + nop
1.106 + nop
1.107 + nop
1.108 + nop
1.109 + nop
1.110 + nop
1.111 + nop
1.112 + nop
1.113 + nop
1.114 + nop
1.115 + nop
1.116 + nop
1.117 + nop
1.118 + nop
1.119 + nop
1.120 + nop
1.121 + nop
1.122 + nop
1.123 + nop
1.124 + nop
1.125 + nop
1.126 + nop
1.127 + nop
1.128 + nop
1.129 + nop
1.130 + nop
1.131 + nop
1.132 + jr ra
1.133 + nop
1.134 +
1.135 +END(PR_StackPop)
1.136 +
1.137 +#endif /* _PR_HAVE_ATOMIC_CAS */
