fpversion [ -foption ]
fpversion prints information about the system CPU and all available floating-point hardware on the standard output. fpversion is available only on SPARC platforms.
Invoked without an argument, some of the following information will be displayed: CPU type and approximate clock rate, FPU type, apparent mask number and approximate clock rate, and highest performance SPARC ABI-compliant floating-point code generation option. The type of information displayed depends upon the system and the floating-point hardware available. The clock rate is derived by executing instructions in a loop and timing with getrusage(2) and is thus somewhat variable.
Prints the fastest SPARC ABI-compliant floating-point code generation option for that particular system. This usage is intended for shell scripts and Makefiles that compile programs but note that the output does not include a leading -".
demo% fpversion A SPARC-based CPU is available. Kernel says CPU's clock rate is 1062.0 MHz. Kernel says main memory's clock rate is 177.0 MHz. Sun-4 floating-point controller version 0 found. An UltraSPARC chip is available. Use "-xtarget=ultra3i -xcache=64/32/4:1024/64/4" code-generation option. Hostid = 0x83270XXX. demo% fpversion -foption xtarget=ultra3i -xcache=64/32/4:1024/64/4
Use fpversion on compiler command lines:
cc -`fpversion -foption` any.c
corresponds to
cc -xtarget=ultra2i -xcache=16/32/1:2048/64/1 any.c
On UltraSPARC platforms, the fastest SPARC ABI-compliant floating-point code generation option does not exploit the full potential of the underlying hardware. If SPARC ABI compliance is not a consideration, use the code generation option of -xtarget=native in 32-bit mode and -xtarget=native64 in 64-bit mode to better utilize the SPARC hardware present.