Doubles, access to odd float registers

[ml7715]

When compiling my correct assembly, which adds two doubles I get the following errors:

mips.s:19: Error: float register should be even, was 5
mips.s:34: Error: float register should be even, was 5
mips.s:42: Error: float register should be even, was 1

However when adding the -mfp32 flag, it compiles fine and works as expected.

Does our assembly have to be FP64 compatible or FP32 is enough?
Can we assume that you will be testing our compiler using the -mfp32 flag?

Thanks,
Marco