Mips Technologies R4000 - Floating-Point Exceptions

MIPS R4000 Microprocessor User's Manual 187
Floating-Point Exceptions
7
This chapter describes FPU floating-point exceptions, including FPU
exception types, exception trap processing, exception flags, saving and
restoring state when handling an exception, and trap handlers for IEEE
Standard 754 exceptions.
A floating-point exception occurs whenever the FPU cannot handle either
the operands or the results of a floating-point operation in its normal way.
The FPU responds by generating an exception to initiate a software trap or
by setting a status flag.