Add VCVTSI2SS (BR 1971564)
Add VCVTSI2SS (BR 1971564)

The VCVTSI2SS instruction was missing.

techkey/nasm,Distrotech/nasm,letolabs/nasm,letolabs/nasm,projedi/nasm,projedi/nasm,projedi/nasm,projedi/nasm,techkey/nasm,Distrotech/nasm,Distrotech/nasm,Distrotech/nasm,techkey/nasm,projedi/nasm,techkey/nasm,turingstudio/nasm,letolabs/nasm,techkey/nasm,turingstudio/nasm,turingstudio/nasm,turingstudio/nasm