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The possible instruction set names returned by isalist(1)
and the SI_ISALIST command of sysinfo(2) are listed here.
The list is ordered within an instruction set family in the sense that later names are generally faster then earlier names; note that this is in the reverse order than listed by isalist(1) and sysinfo(2). In the following list of values, numbered entries generally represent increasing performance; lettered entries are either mutually
exclusive or cannot be ordered.
SPARC Platforms
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Where appropriate, correspondence with a given value of the -xarch option of Sun's C 4.0 compiler is indicated. Other compilers may have similar options.
- 1a. sparc
- Indicates the SPARC V8 instruction set, as defined in The SPARC Architecture Manual, Version
8, Prentice-Hall, Inc., 1992. Some instructions (such as integer multiply and divide, FSMULD, and all floating point operations on quad operands) may be emulated by the kernel on certain systems.
- 1b. sparcv7
- Same as sparc. This corresponds to code produced with the -xarch=v7 option of Sun's C 4.0 compiler.
- 2. sparcv8-fsmuld
- Like sparc, except that integer multiply and divide must be executed in hardware. This corresponds to code produced with the -xarch=v8a
option of Sun's C 4.0 compiler.
- 3. sparcv8
- Like sparcv8-fsmuld, except that FSMULD must also be executed in hardware. This corresponds to code produced with the -xarch=v8 option of
Sun's C 4.0 compiler.
- 4. sparcv8plus
- Indicates the SPARC V8 instruction set plus those instructions in the SPARC V9 instruction set, as defined in The SPARC
Architecture Manual, Version 9, Prentice-Hall, 1994, that can be used according to The V8+ Technical Specification. This corresponds to code produced with the -xarch=v8plus
option of Sun's C 4.0 compiler.
- 5a. sparcv8plus+vis
- Like sparcv8plus, with the addition of those UltraSPARC I Visualization Instructions that can be used according to
The V8+ Technical Specification. This corresponds to code produced with the -xarch=v8plusa option of Sun's C 4.0 compiler.
- 5b. sparcv8plus+fmuladd
- Like sparcv8plus, with the addition of the Hal SPARC64 floating multiply-add and multiply-subtract instructions.
- 6. sparcv9
- Indicates the SPARC V9 instruction set, as defined in The SPARC Architecture Manual, Version 9, Prentice-Hall, 1994.
- 7a. sparcv9+vis
- Like sparcv9, with the addition of the UltraSPARC I Visualization Instructions.
- 7b. sparcv9+fmuladd
- Like sparcv9, with the addition of the Hal SPARC64 floating multiply-add and multiply-subtract instructions.
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Intel Platforms
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- 1. i386
- The Intel 80386 instruction set, as described in The i386 Microprocessor Programmer's Reference
Manual.
- 2. i486
- The Intel 80486 instruction set, as described in The i486 Microprocessor Programmer's Reference Manual. (This is effectively
i386, plus the CMPXCHG, BSWAP, and XADD instructions.)
- 3. pentium
- The Intel Pentium instruction set, as described in The Pentium Processor User's Manual. (This is effectively i486, plus the
CPU_ID instruction, and any features that the CPU_ID instruction indicates are present.)
- 4. pentium+mmx
- Like pentium, with the MMX instructions guaranteed present.
- 5. pentium_pro
- The Intel PentiumPro instruction set, as described in The PentiumPro Family Developer's Manual. (This is effectively
pentium, with the CMOVcc, FCMOVcc, FCOMI, and RDPMC instructions guaranteed present.)
- 6. pentium_pro+mmx
- Like pentium_pro, with the MMX instructions guaranteed present.
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