NAME

fpa − Sun-3 floating-point accelerator

CONFIG — SUN-3 SYSTEM

fpa0 at virtual ? csr 0xe0000000

DESCRIPTION

The fpa is a floating point accelerator available for Sun-3 systems. 

The fpa device driver manipulates the 32 contexts supported by the floating point accelerator hardware. 

The open(2V), close(2), and ioctl(2) system calls generally produce errors when applied to this device.  However, since the 32 fpa contexts are allocated and deallocated automatically, and no user program needs to access fpa registers explicitly, such calls to the device are generally unnecessary.  Access to the device is normally provided at compile time by a compiler option, such as the −ffpa option to cc(1V). 

FILES

/dev/fpa

SEE ALSO

cc(1V), close(2), ioctl(2), open(2V)

Sun Release 4.0  —  Last change: 9 October 1987