diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/common/atomic/powerpc64/opensolaris_atomic.S')
-rw-r--r-- | sys/cddl/contrib/opensolaris/common/atomic/powerpc64/opensolaris_atomic.S | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/common/atomic/powerpc64/opensolaris_atomic.S b/sys/cddl/contrib/opensolaris/common/atomic/powerpc64/opensolaris_atomic.S new file mode 100644 index 000000000000..0ab5d19c5a68 --- /dev/null +++ b/sys/cddl/contrib/opensolaris/common/atomic/powerpc64/opensolaris_atomic.S @@ -0,0 +1,88 @@ +/*- + * Copyright (C) 2010 Nathan Whitehorn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 TOOLS GMBH 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. + * + * $FreeBSD$ + */ + +#include <machine/asm.h> + +ENTRY(atomic_add_64_nv) + 1: ldarx %r5,0,%r3 + add %r5,%r4,%r5 + stdcx. %r5,0,%r3 + bne- 1b + + mr %r3,%r5 + blr + +ENTRY(atomic_cas_32) + 1: lwarx %r6,0,%r3 + cmplw %r6,%r4 + bne 2f + stwcx. %r5,0,%r3 + bne- 1b + b 3f + + 2: stwcx. %r6,0,%r3 /* clear reservation */ + + 3: mr %r3,%r6 + blr + +ENTRY(atomic_cas_64) + 1: ldarx %r6,0,%r3 + cmpld %r6,%r4 + bne 2f + stdcx. %r5,0,%r3 + bne- 1b + b 3f + + 2: stdcx. %r6,0,%r3 /* clear reservation */ + + 3: mr %r3,%r6 + blr + +ENTRY(atomic_or_8_nv) + li %r6,3 + andc. %r6,%r3,%r6 /* r6 = r3 & ~4 */ + addi %r7,%r6,3 + sub %r7,%r7,%r3 /* offset in r7 */ + sldi %r7,%r7,3 /* bits to shift in r7 */ + + rlwinm %r4,%r4,0,24,31 /* mask and rotate the argument */ + slw %r4,%r4,%r7 + + 1: lwarx %r5,0,%r6 + or %r5,%r4,%r5 + stwcx. %r5,0,%r6 + bne- 1b + + srw %r3,%r5,%r7 + rlwinm %r3,%r3,0,24,31 /* mask return value */ + + blr + +ENTRY(membar_producer) + eieio + blr + |