generic
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Gets good performance on most SPARC processors, major degradation on none.
With each new release, this best instruction set will be adjusted, if appropriate.
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v7
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Limits instruction set to V7 architecture.
This option uses the best instruction set for good performance on the V7 architecture, but without the quad-precision floating-point instructions. This is equivalent to using the best instruction set for good performance on the V8 architecture, but without the following instructions:
Examples: SPARCstation(TM) 1, SPARCstation 2
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v8a
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Limits instruction set to the V8a version of the V8 architecture.
By definition, V8a means the V8 architecture, but without:
Example: Any machine based on microSPARC(TM) I chip architecture
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v8
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Limits instruction set to V8 architecture.
This option uses the best instruction set for good performance on the V8 architecture, but without quad-precision floating-point instructions.
Example: SPARCstation 10
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v8plus
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Limits instruction set to the V8plus version of the V9 architecture.
By definition, V8plus means the V9 architecture, but:
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Without the quad-precision floating-point instructions
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Limited to the 32-bit subset defined by the V8+ specification
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Without the VIS instructions
In V8plus, a system with the 64-bit registers of V9 runs in 32-bit addressing mode, but the upper 32 bits of the i and l registers must not affect program results.
Example: Any machine based on UltraSPARC(TM) chip architecture.
Use of this option also causes the .o file to be marked as a V8plus binary. Such files do not run on a V7 or V8 machine.
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v8plusa
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Limits instruction set to the V8plusa architecture variation.
By definition, V8plusa means the V8plus architecture, plus:
This option uses the best instruction set for good performance on the UltraSPARC architecture, but limited to the 32-bit subset defined by the V8plus specification.
Example: Any machine based on UltraSPARC chip architecture
Use of this option also causes the .o file to be marked as a Sun-specific V8plus binary. Such files do not run on a V7 or V8 machine.
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v9
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Limits instruction set to the SPARC-V9 architecture.
The resulting .o object files are in 64-bit ELF format and can only be linked with other object files in the same format.
The resulting executable can be run only on a 64-bit SPARC processor running 64-bit Solaris 7 software with the 64-bit kernel.
Compiling with this option uses the best instruction set for good performance on the V9 SPARC architecture, but without the use of quad-precision floating-point instructions (available only with 64-bit Solaris 7 software).
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v9a
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Limits instruction set to the SPARC-V9 architecture, adding the Visual Instruction Set (VIS) and extensions specific to UltraSPARC processors. The resulting .o object files are in 64-bit ELF format and can be linked only with other object files in the same format.
The resulting executable can be run only on a 64-bit UltraSPARC processor running 64-bit Solaris 7 software with the 64-bit kernel.
Compiling with this option uses the best instruction set for good performance on the V9 UltraSPARC architecture, but without the use of quad-precision floating-point instruction (available only with 64-bit Solaris 7 software).
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