/* 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" #ifdef __LP64__ #if SIZEOF_VOID_P != 8 #error "__LP64__ state and SIZEOF_VOID_P don't match!!" #endif #define EXPORT_ARGS ,NO_RELOCATION,LONG_RETURN #define CALLINFO_ARGS ,ARGS_SAVED,ORDERING_AWARE #define RETURN bve,n (%rp) #define LDPTR ldd #define STPTR std #else #if SIZEOF_VOID_P != 4 #error "__LP64__ state and SIZEOF_VOID_P don't match!!" #endif #define CALLINFO_ARGS #define EXPORT_ARGS #define RETURN bv,n (%rp) #define LDPTR ldw #define STPTR stw #endif .code .label InterlockedIncrement .EXPORT InterlockedIncrement,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$1 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$1 NOP .label spin$1 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$1 NOP B,N atomictest$1 .label gotlock$1 LDW 0(%arg0),%ret0 LDI 1,%r29 LDO 1(%ret0),%ret0 STW %ret0,0(%arg0) STW %r29,0(%r31) .EXIT RETURN .PROCEND .label InterlockedDecrement .EXPORT InterlockedDecrement,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$2 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$2 NOP .label spin$2 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$2 NOP B,N atomictest$2 .label gotlock$2 LDW 0(%arg0),%ret0 LDI 1,%r29 LDO -1(%ret0),%ret0 STW %ret0,0(%arg0) STW %r29,0(%r31) .EXIT RETURN .PROCEND .label InterlockedExchange .EXPORT InterlockedExchange,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$3 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$3 NOP .label spin$3 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$3 NOP B,N atomictest$3 .label gotlock$3 LDW 0(%arg0),%ret0 STW %arg1,0(%arg0) LDI 1,%r29 STW %r29,0(%r31) .EXIT RETURN .PROCEND .label InterlockedExchangePointer .EXPORT InterlockedExchangePointer,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$4 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$4 NOP .label spin$4 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$4 NOP B,N atomictest$4 .label gotlock$4 LDPTR 0(%arg0),%ret0 STPTR %arg1,0(%arg0) LDI 1,%r29 STW %r29,0(%r31) .EXIT RETURN .PROCEND .label InterlockedCompareExchange .EXPORT InterlockedCompareExchange,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$5 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$5 NOP .label spin$5 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$5 NOP B,N atomictest$5 .label gotlock$5 LDW 0(%arg0),%ret0 sub,<> %ret0,%r24,%r0 STW %arg1,0(%arg0) /* not done if %ret0 <> %r24 */ LDI 1,%r29 STW %r29,0(%r31) .EXIT RETURN .PROCEND .label InterlockedCompareExchangePointer .EXPORT InterlockedCompareExchangePointer,ENTRY,PRIV_LEV=3 EXPORT_ARGS .PROC .CALLINFO FRAME=0 CALLINFO_ARGS .ENTRY #ifdef PIC ADDIL LT%locks,%r19 LDPTR RT%locks(%r1),%r31 #else ADDIL L%locks-$global$,%dp LDO R%locks-$global$(%r1),%r31 #endif EXTRU %arg0,28,4,%r28 ZDEP %r28,27,28,%r29 ADD,L %r29,%r31,%r31 .label atomictest$6 LDCW 0(%r31),%r29 CMPB,<> %r0,%r29,gotlock$6 NOP .label spin$6 LDW 0(%r31),%r29 CMPB,= %r29,%r0,spin$6 NOP B,N atomictest$6 .label gotlock$6 LDPTR 0(%arg0),%ret0 sub,<> %ret0,%r24,%r0 STPTR %arg1,0(%arg0) LDI 1,%r29 STW %r29,0(%r31) .EXIT RETURN .PROCEND .data .label 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