C++ User's Guide

`-xchip=c`

Specifies target processor for use by the optimizer.

The -xchip option specifies timing properties by specifying the target processor. This option affects:

The ordering of instructions--that is, scheduling

The way the compiler uses branches

The instructions to use in cases where semantically equivalent alternatives are available

Note -
Although this option can be used alone, it is part of the expansion of the -xtarget option; its primary use is to override a value supplied by the -xtarget option.

Values

The following table lists the valid values for c.

Platform	Value of c	Optimize for
SPARC	`generic`	Using timing properties for good performance on most SPARC processors
SPARC	`old`	Using timing properties of processors earlier than the SuperSPARC(TM) chip
SPARC	`super`	Using timing properties of the SuperSPARC chip
SPARC	`super2`	Using timing properties of the SuperSPARC II chip
SPARC	`micro`	Using timing properties of the microSPARC chip
SPARC	`micro2`	Using timing properties of the microSPARC II chip
SPARC	`hyper`	Using timing properties of the hyperSPARC(TM) chip
SPARC	`hyper2`	Using timing properties of the hyperSPARC II chip
SPARC	`powerup`	Using timing properties of the Weitek PowerUp chip
SPARC	`ultra`	Using timing properties of the UltraSPARC I chip
SPARC	`ultra2`	Using timing properties of the UltraSPARC II chip
SPARC	`ultra2i`	Using timing properties of the UltraSPARC IIi chip
x86	`generic`	Using timing properties of most x86 processors
x86	`386`	Using timing properties of the Intel 386 chip
x86	`486`	Using timing properties of the Intel 486 chip
x86	`pentium`	Using timing properties of the Intel Pentium chip
x86	`pentium_pro`	Using timing properties of the Intel Pentium Pro chip

`Defaults`

On most SPARC processors, generic is the default value that directs the compiler to use the best timing properties for good performance without major performance degradation on any of them.