MIssing GasPrice for FHECast, FhePubKey and ProtectedMemory ?

[jatZama]

I was not able to find the GasPrice for casting operations in the code https://github.com/zama-ai/fhevm-go/blob/main/fhevm/precompiles.go#L700
I noticed that I paid the same gas (edit: found mistake in my test) a bit less than 1000 gas when replacing in a transaction this line :
euint16 xx = TFHE.asEuint16(x);
with this one :
euint32 xx = TFHE.asEuint32(TFHE.asEuint16(x));

Same seem to be true for the FhePubKey precompile function.

We could DDOS the network easily if the gas is set to 0 or too low.

Also : where is the price for the storing or loading privileged memory? I only found a cost for privileged storage but not privileged memory.