Cause register's value in MIPS32 architecture

If the value in the cause register is, for example, 0x00000100, how can I obtain the type of exception that has generated that code?(from the table below)

0 Int interrupt (hardware)

4 AdEL address error exception (load or instruction fetch)

5 AdES address error exception (store)

6 IBE bus error on instruction fetch

7 DBE bus error on data load or store

8 Sys syscall exception

9 Bp breakpoint exception

10 RI reserved instruction exception

11 CpU coprocessor unimplemented

12 Ov arithmetic overfl ow exception

13 Tr trap

15 FPE fl oating point

This is described in the section named 6.15 Status Register (CP Register 12, Select 0) in MIPS32™ Architecture For Programmers Volume III: The MIPS32™ Privileged Resource Architecture.

Cause Register Format

31 | 30 | 29  28 | 27 24 | 23 | 22 | 21 16 | 15  8 | 7 | 6       2 | 1 0
------------------------------------------------------------------------
BD | 0  |   CE   |   0   | IV | WP  |  0   |   IP  | 0 |  ExcCode  |  0


 IP[1:0]  Controls the request for software interrupts

In your example with 0x100, that means that only IP0 (bit 8) of the cause register is set, which means that the cause was a software interrupt request (software interrupt 0 to be specific).