/* Copyright (c) 2003 Bernie Solomon 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