/*
Copyright (c) 2003 Bernie Solomon <bernard@ugsolutions.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Implementation of "atomic" operations for HPPA. Currently (Oct 9th 2003)
only implemented for 64 bit compiles. There is only one atomic
instruction LDCW which is used to implement spinlocks. There are
16 locks which are selected by taking 4 bits out of the address of
the relevant variable to try to avoid too much contention
for a single lock.
*/
#include "config.h"
#if SIZEOF_VOID_P != 8
#error "Currently only supports 64 bit pointers"
#endif
.SPACE $TEXT$,SORT=8
.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=0x2c,CODE_ONLY,SORT=24
InterlockedIncrement
.EXPORT InterlockedIncrement,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$1
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$1
NOP
spin$1
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$1
NOP
B,N atomictest$1
gotlock$1
LDW 0(%r26),%r28
LDO 1(%r28),%r28
STW %r28,0(%r26)
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
InterlockedDecrement
.EXPORT InterlockedDecrement,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$2
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$2
NOP
spin$2
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$2
NOP
B,N atomictest$2
gotlock$2
LDW 0(%r26),%r28
LDO -1(%r28),%r28
STW %r28,0(%r26)
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
InterlockedExchange
.EXPORT InterlockedExchange,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$3
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$3
NOP
spin$3
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$3
NOP
B,N atomictest$3
gotlock$3
LDW 0(%r26),%r28
STW %r25,0(%r26)
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
InterlockedExchangePointer
.EXPORT InterlockedExchangePointer,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$4
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$4
NOP
spin$4
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$4
NOP
B,N atomictest$4
gotlock$4
LDD 0(%r26),%r28
STD %r25,0(%r26)
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
InterlockedCompareExchange
.EXPORT InterlockedCompareExchange,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$5
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$5
NOP
spin$5
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$5
NOP
B,N atomictest$5
gotlock$5
LDW 0(%r26),%r28
CMPB,<> %r28,%r24,noexchange$5
NOP
STW %r25,0(%r26)
noexchange$5
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
InterlockedCompareExchangePointer
.EXPORT InterlockedCompareExchangePointer,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
.PROC
.CALLINFO FRAME=0,ARGS_SAVED,ORDERING_AWARE
.ENTRY
ADDIL L'locks-$global$,%r27,%r1
LDO R'locks-$global$(%r1),%r31
EXTRD,U %r26,60,4,%r28
DEPD,Z %r28,59,60,%r29
ADD,L %r29,%r31,%r31
atomictest$6
LDCW 0(%r31),%r29
CMPB,<>,N %r0,%r29,gotlock$6
NOP
spin$6
LDW 0(%r31),%r29
CMPB,=,N %r29,%r0,spin$6
NOP
B,N atomictest$6
gotlock$6
LDD 0(%r26),%r28
CMPB,*<> %r28,%r24,noexchange$6
NOP
STD %r25,0(%r26)
noexchange$6
LDI 1,%r29
STW %r29,0(%r31)
.EXIT
BVE,N (%r2)
.PROCEND
.SPACE $PRIVATE$,SORT=16
.SUBSPA $SHORTDATA$,QUAD=1,ALIGN=8,ACCESS=0x1f,SORT=24
locks
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.ALIGN 16
.STRING "\x00\x00\x00\x01"
.IMPORT $global$,DATA
.END
