FreeBSD/Linux Kernel Cross Reference
sys/cddl/contrib/opensolaris/uts/common/sys/isa_defs.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or http://www.opensolaris.org/os/licensing.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    /*
     * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    
    #ifndef _SYS_ISA_DEFS_H
    #define _SYS_ISA_DEFS_H
    
    /*
     * This header file serves to group a set of well known defines and to
     * set these for each instruction set architecture.  These defines may
     * be divided into two groups;  characteristics of the processor and
     * implementation choices for Solaris on a processor.
     *
     * Processor Characteristics:
     *
     * _LITTLE_ENDIAN / _BIG_ENDIAN:
     *      The natural byte order of the processor.  A pointer to an int points
     *      to the least/most significant byte of that int.
     *
     * _STACK_GROWS_UPWARD / _STACK_GROWS_DOWNWARD:
     *      The processor specific direction of stack growth.  A push onto the
     *      stack increases/decreases the stack pointer, so it stores data at
     *      successively higher/lower addresses.  (Stackless machines ignored
     *      without regrets).
     *
     * _LONG_LONG_HTOL / _LONG_LONG_LTOH:
     *      A pointer to a long long points to the most/least significant long
     *      within that long long.
     *
     * _BIT_FIELDS_HTOL / _BIT_FIELDS_LTOH:
     *      The C compiler assigns bit fields from the high/low to the low/high end
     *      of an int (most to least significant vs. least to most significant).
     *
     * _IEEE_754:
     *      The processor (or supported implementations of the processor)
     *      supports the ieee-754 floating point standard.  No other floating
     *      point standards are supported (or significant).  Any other supported
     *      floating point formats are expected to be cased on the ISA processor
     *      symbol.
     *
     * _CHAR_IS_UNSIGNED / _CHAR_IS_SIGNED:
     *      The C Compiler implements objects of type `char' as `unsigned' or
     *      `signed' respectively.  This is really an implementation choice of
     *      the compiler writer, but it is specified in the ABI and tends to
     *      be uniform across compilers for an instruction set architecture.
     *      Hence, it has the properties of a processor characteristic.
     *
     * _CHAR_ALIGNMENT / _SHORT_ALIGNMENT / _INT_ALIGNMENT / _LONG_ALIGNMENT /
     * _LONG_LONG_ALIGNMENT / _DOUBLE_ALIGNMENT / _LONG_DOUBLE_ALIGNMENT /
     * _POINTER_ALIGNMENT / _FLOAT_ALIGNMENT:
     *      The ABI defines alignment requirements of each of the primitive
     *      object types.  Some, if not all, may be hardware requirements as
     *      well.  The values are expressed in "byte-alignment" units.
     *
     * _MAX_ALIGNMENT:
     *      The most stringent alignment requirement as specified by the ABI.
     *      Equal to the maximum of all the above _XXX_ALIGNMENT values.
     *
     * _ALIGNMENT_REQUIRED:
     *      True or false (1 or 0) whether or not the hardware requires the ABI
     *      alignment.
     *
     * _LONG_LONG_ALIGNMENT_32
     *      The 32-bit ABI supported by a 64-bit kernel may have different
     *      alignment requirements for primitive object types.  The value of this
     *      identifier is expressed in "byte-alignment" units.
     *
     * _HAVE_CPUID_INSN
     *      This indicates that the architecture supports the 'cpuid'
     *      instruction as defined by Intel.  (Intel allows other vendors
     *      to extend the instruction for their own purposes.)
     *
     *
     * Implementation Choices:
     *
     * _ILP32 / _LP64:
    *      This specifies the compiler data type implementation as specified in
    *      the relevant ABI.  The choice between these is strongly influenced
    *      by the underlying hardware, but is not absolutely tied to it.
    *      Currently only two data type models are supported:
    *
    *      _ILP32:
    *              Int/Long/Pointer are 32 bits.  This is the historical UNIX
    *              and Solaris implementation.  Due to its historical standing,
    *              this is the default case.
    *
    *      _LP64:
    *              Long/Pointer are 64 bits, Int is 32 bits.  This is the chosen
    *              implementation for 64-bit ABIs such as SPARC V9.
    *
    *      _I32LPx:
    *              A compilation environment where 'int' is 32-bit, and
    *              longs and pointers are simply the same size.
    *
    *      In all cases, Char is 8 bits and Short is 16 bits.
    *
    * _SUNOS_VTOC_8 / _SUNOS_VTOC_16 / _SVR4_VTOC_16:
    *      This specifies the form of the disk VTOC (or label):
    *
    *      _SUNOS_VTOC_8:
    *              This is a VTOC form which is upwardly compatible with the
    *              SunOS 4.x disk label and allows 8 partitions per disk.
    *
    *      _SUNOS_VTOC_16:
    *              In this format the incore vtoc image matches the ondisk
    *              version.  It allows 16 slices per disk, and is not
    *              compatible with the SunOS 4.x disk label.
    *
    *      Note that these are not the only two VTOC forms possible and
    *      additional forms may be added.  One possible form would be the
    *      SVr4 VTOC form.  The symbol for that is reserved now, although
    *      it is not implemented.
    *
    *      _SVR4_VTOC_16:
    *              This VTOC form is compatible with the System V Release 4
    *              VTOC (as implemented on the SVr4 Intel and 3b ports) with
    *              16 partitions per disk.
    *
    *
    * _DMA_USES_PHYSADDR / _DMA_USES_VIRTADDR
    *      This describes the type of addresses used by system DMA:
    *
    *      _DMA_USES_PHYSADDR:
    *              This type of DMA, used in the x86 implementation,
    *              requires physical addresses for DMA buffers.  The 24-bit
    *              addresses used by some legacy boards is the source of the
    *              "low-memory" (<16MB) requirement for some devices using DMA.
    *
    *      _DMA_USES_VIRTADDR:
    *              This method of DMA allows the use of virtual addresses for
    *              DMA transfers.
    *
    * _FIRMWARE_NEEDS_FDISK / _NO_FDISK_PRESENT
    *      This indicates the presence/absence of an fdisk table.
    *
    *      _FIRMWARE_NEEDS_FDISK
    *              The fdisk table is required by system firmware.  If present,
    *              it allows a disk to be subdivided into multiple fdisk
    *              partitions, each of which is equivalent to a separate,
    *              virtual disk.  This enables the co-existence of multiple
    *              operating systems on a shared hard disk.
    *
    *      _NO_FDISK_PRESENT
    *              If the fdisk table is absent, it is assumed that the entire
    *              media is allocated for a single operating system.
    *
    * _HAVE_TEM_FIRMWARE
    *      Defined if this architecture has the (fallback) option of
    *      using prom_* calls for doing I/O if a suitable kernel driver
    *      is not available to do it.
    *
    * _DONT_USE_1275_GENERIC_NAMES
    *              Controls whether or not device tree node names should
    *              comply with the IEEE 1275 "Generic Names" Recommended
    *              Practice. With _DONT_USE_GENERIC_NAMES, device-specific
    *              names identifying the particular device will be used.
    *
    * __i386_COMPAT
    *      This indicates whether the i386 ABI is supported as a *non-native*
    *      mode for the platform.  When this symbol is defined:
    *      -       32-bit xstat-style system calls are enabled
    *      -       32-bit xmknod-style system calls are enabled
    *      -       32-bit system calls use i386 sizes -and- alignments
    *
    *      Note that this is NOT defined for the i386 native environment!
    *
    * __x86
    *      This is ONLY a synonym for defined(__i386) || defined(__amd64)
    *      which is useful only insofar as these two architectures share
    *      common attributes.  Analogous to __sparc.
    *
    * _PSM_MODULES
    *      This indicates whether or not the implementation uses PSM
    *      modules for processor support, reading /etc/mach from inside
    *      the kernel to extract a list.
    *
    * _RTC_CONFIG
    *      This indicates whether or not the implementation uses /etc/rtc_config
    *      to configure the real-time clock in the kernel.
    *
    * _UNIX_KRTLD
    *      This indicates that the implementation uses a dynamically
    *      linked unix + krtld to form the core kernel image at boot
    *      time, or (in the absence of this symbol) a prelinked kernel image.
    *
    * _OBP
    *      This indicates the firmware interface is OBP.
    *
    * _SOFT_HOSTID
    *      This indicates that the implementation obtains the hostid
    *      from the file /etc/hostid, rather than from hardware.
    */
   
   #ifdef  __cplusplus
   extern "C" {
   #endif
   
   /*
    * The following set of definitions characterize Solaris on AMD's
    * 64-bit systems.
    */
   #if defined(__x86_64) || defined(__amd64)
   
   #if !defined(__amd64)
   #define __amd64         /* preferred guard */
   #endif
   
   #if !defined(__x86)
   #define __x86
   #endif
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #ifdef illumos
   #define _LITTLE_ENDIAN
   #endif
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_SIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_ALIGNMENT                 8
   #define _LONG_LONG_ALIGNMENT            8
   #define _DOUBLE_ALIGNMENT               8
   #define _DOUBLE_COMPLEX_ALIGNMENT       8
   #define _LONG_DOUBLE_ALIGNMENT          16
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  16
   #define _POINTER_ALIGNMENT              8
   #define _MAX_ALIGNMENT                  16
   #define _ALIGNMENT_REQUIRED             1
   
   /*
    * Different alignment constraints for the i386 ABI in compatibility mode
    */
   #define _LONG_LONG_ALIGNMENT_32         4
   
   /*
    * Define the appropriate "implementation choices".
    */
   #if !defined(_LP64)
   #define _LP64
   #endif
   #if !defined(_I32LPx) && defined(_KERNEL)
   #define _I32LPx
   #endif
   #define _MULTI_DATAMODEL
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define __i386_COMPAT
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _SOFT_HOSTID
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   /*
    * The feature test macro __i386 is generic for all processors implementing
    * the Intel 386 instruction set or a superset of it.  Specifically, this
    * includes all members of the 386, 486, and Pentium family of processors.
    */
   #elif defined(__i386) || defined(__i386__)
   
   #if !defined(__i386)
   #define __i386
   #endif
   
   #if !defined(__x86)
   #define __x86
   #endif
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #ifdef illumos
   #define _LITTLE_ENDIAN
   #endif
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_SIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_ALIGNMENT                 4
   #define _LONG_LONG_ALIGNMENT            4
   #define _DOUBLE_ALIGNMENT               4
   #define _DOUBLE_COMPLEX_ALIGNMENT       4
   #define _LONG_DOUBLE_ALIGNMENT          4
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  4
   #define _POINTER_ALIGNMENT              4
   #define _MAX_ALIGNMENT                  4
   #define _ALIGNMENT_REQUIRED             0
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices".
    */
   #if !defined(_ILP32)
   #define _ILP32
   #endif
   #if !defined(_I32LPx) && defined(_KERNEL)
   #define _I32LPx
   #endif
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _SOFT_HOSTID
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   #elif defined(__aarch64__)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_UNSIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_ALIGNMENT                 8
   #define _LONG_LONG_ALIGNMENT            8
   #define _DOUBLE_ALIGNMENT               8
   #define _DOUBLE_COMPLEX_ALIGNMENT       8
   #define _LONG_DOUBLE_ALIGNMENT          16
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  16
   #define _POINTER_ALIGNMENT              8
   #define _MAX_ALIGNMENT                  16
   #define _ALIGNMENT_REQUIRED             1
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices"
    */
   #if !defined(_LP64)
   #define _LP64
   #endif
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   #elif defined(__riscv)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_UNSIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_ALIGNMENT                 8
   #define _LONG_LONG_ALIGNMENT            8
   #define _DOUBLE_ALIGNMENT               8
   #define _DOUBLE_COMPLEX_ALIGNMENT       8
   #define _LONG_DOUBLE_ALIGNMENT          16
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  16
   #define _POINTER_ALIGNMENT              8
   #define _MAX_ALIGNMENT                  16
   #define _ALIGNMENT_REQUIRED             1
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices"
    */
   #if !defined(_LP64)
   #define _LP64
   #endif
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   #elif defined(__arm__)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_SIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_ALIGNMENT                 4
   #define _LONG_LONG_ALIGNMENT            4
   #define _DOUBLE_ALIGNMENT               4
   #define _DOUBLE_COMPLEX_ALIGNMENT       4
   #define _LONG_DOUBLE_ALIGNMENT          4
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  4
   #define _POINTER_ALIGNMENT              4
   #define _MAX_ALIGNMENT                  4
   #define _ALIGNMENT_REQUIRED             0
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices".
    */
   #if !defined(_ILP32)
   #define _ILP32
   #endif
   #if !defined(_I32LPx) && defined(_KERNEL)
   #define _I32LPx
   #endif
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   #elif defined(__mips__)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_LTOH
   #define _BIT_FIELDS_LTOH
   #define _IEEE_754
   #define _CHAR_IS_SIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #if defined(__mips_n64)
   #define _LONG_ALIGNMENT                 8
   #define _LONG_LONG_ALIGNMENT            8
   #define _DOUBLE_ALIGNMENT               8
   #define _DOUBLE_COMPLEX_ALIGNMENT       8
   #define _LONG_DOUBLE_ALIGNMENT          8
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  8
   #define _POINTER_ALIGNMENT              8
   #define _MAX_ALIGNMENT                  8
   #define _ALIGNMENT_REQUIRED             0
   
   #define _LONG_LONG_ALIGNMENT_32         _INT_ALIGNMENT
   /*
    * Define the appropriate "implementation choices".
    */
   #if !defined(_LP64)
   #define _LP64
   #endif
   #else
   #define _LONG_ALIGNMENT                 4
   #define _LONG_LONG_ALIGNMENT            4
   #define _DOUBLE_ALIGNMENT               4
   #define _DOUBLE_COMPLEX_ALIGNMENT       4
   #define _LONG_DOUBLE_ALIGNMENT          4
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  4
   #define _POINTER_ALIGNMENT              4
   #define _MAX_ALIGNMENT                  4
   #define _ALIGNMENT_REQUIRED             0
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices".
    */
   #if !defined(_ILP32)
   #define _ILP32
   #endif
   #if !defined(_I32LPx) && defined(_KERNEL)
   #define _I32LPx
   #endif
   #endif
   #define _SUNOS_VTOC_16
   #define _DMA_USES_PHYSADDR
   #define _FIRMWARE_NEEDS_FDISK
   #define _PSM_MODULES
   #define _RTC_CONFIG
   #define _DONT_USE_1275_GENERIC_NAMES
   #define _HAVE_CPUID_INSN
   
   #elif defined(__powerpc__)
   
   #if defined(__BIG_ENDIAN__)
   #define _BIT_FIELDS_HTOL
   #else
   #define _BIT_FIELDS_LTOH
   #endif
   
   /*
    * The following set of definitions characterize the Solaris on SPARC systems.
    *
    * The symbol __sparc indicates any of the SPARC family of processor
    * architectures.  This includes SPARC V7, SPARC V8 and SPARC V9.
    *
    * The symbol __sparcv8 indicates the 32-bit SPARC V8 architecture as defined
    * by Version 8 of the SPARC Architecture Manual.  (SPARC V7 is close enough
    * to SPARC V8 for the former to be subsumed into the latter definition.)
    *
    * The symbol __sparcv9 indicates the 64-bit SPARC V9 architecture as defined
    * by Version 9 of the SPARC Architecture Manual.
    *
    * The symbols __sparcv8 and __sparcv9 are mutually exclusive, and are only
    * relevant when the symbol __sparc is defined.
    */
   /*
    * XXX Due to the existence of 5110166, "defined(__sparcv9)" needs to be added
    * to support backwards builds.  This workaround should be removed in s10_71.
    */
   #elif defined(__sparc) || defined(__sparcv9) || defined(__sparc__)
   #if !defined(__sparc)
   #define __sparc
   #endif
   
   /*
    * You can be 32-bit or 64-bit, but not both at the same time.
    */
   #if defined(__sparcv8) && defined(__sparcv9)
   #error  "SPARC Versions 8 and 9 are mutually exclusive choices"
   #endif
   
   /*
    * Existing compilers do not set __sparcv8.  Years will transpire before
    * the compilers can be depended on to set the feature test macro. In
    * the interim, we'll set it here on the basis of historical behaviour;
    * if you haven't asked for SPARC V9, then you must've meant SPARC V8.
    */
   #if !defined(__sparcv9) && !defined(__sparcv8)
   #define __sparcv8
   #endif
   
   /*
    * Define the appropriate "processor characteristics" shared between
    * all Solaris on SPARC systems.
    */
   #ifdef illumos
   #define _BIG_ENDIAN
   #endif
   #define _STACK_GROWS_DOWNWARD
   #define _LONG_LONG_HTOL
   #define _BIT_FIELDS_HTOL
   #define _IEEE_754
   #define _CHAR_IS_SIGNED
   #define _BOOL_ALIGNMENT                 1
   #define _CHAR_ALIGNMENT                 1
   #define _SHORT_ALIGNMENT                2
   #define _INT_ALIGNMENT                  4
   #define _FLOAT_ALIGNMENT                4
   #define _FLOAT_COMPLEX_ALIGNMENT        4
   #define _LONG_LONG_ALIGNMENT            8
   #define _DOUBLE_ALIGNMENT               8
   #define _DOUBLE_COMPLEX_ALIGNMENT       8
   #define _ALIGNMENT_REQUIRED             1
   
   /*
    * Define the appropriate "implementation choices" shared between versions.
    */
   #define _SUNOS_VTOC_8
   #define _DMA_USES_VIRTADDR
   #define _NO_FDISK_PRESENT
   #define _HAVE_TEM_FIRMWARE
   #define _OBP
   
   /*
    * The following set of definitions characterize the implementation of
    * 32-bit Solaris on SPARC V8 systems.
    */
   #if defined(__sparcv8)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _LONG_ALIGNMENT                 4
   #define _LONG_DOUBLE_ALIGNMENT          8
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  8
   #define _POINTER_ALIGNMENT              4
   #define _MAX_ALIGNMENT                  8
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices"
    */
   #define _ILP32
   #if !defined(_I32LPx) && defined(_KERNEL)
   #define _I32LPx
   #endif
   
   /*
    * The following set of definitions characterize the implementation of
    * 64-bit Solaris on SPARC V9 systems.
    */
   #elif defined(__sparcv9)
   
   /*
    * Define the appropriate "processor characteristics"
    */
   #define _LONG_ALIGNMENT                 8
   #define _LONG_DOUBLE_ALIGNMENT          16
   #define _LONG_DOUBLE_COMPLEX_ALIGNMENT  16
   #define _POINTER_ALIGNMENT              8
   #define _MAX_ALIGNMENT                  16
   
   #define _LONG_LONG_ALIGNMENT_32         _LONG_LONG_ALIGNMENT
   
   /*
    * Define the appropriate "implementation choices"
    */
   #if !defined(_LP64)
   #define _LP64
   #endif
   #if !defined(_I32LPx)
   #define _I32LPx
   #endif
   #define _MULTI_DATAMODEL
   
   #else
   #error  "unknown SPARC version"
   #endif
   
   /*
    * #error is strictly ansi-C, but works as well as anything for K&R systems.
    */
   #else
   #error "ISA not supported"
   #endif
   
   #if defined(_ILP32) && defined(_LP64)
   #error "Both _ILP32 and _LP64 are defined"
   #endif
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif  /* _SYS_ISA_DEFS_H */

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