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Home > NEON and VFP Programming > VFP directives and vector notation |

This applies only to `armasm`

. The inline
assemblers in the C and C++ compilers do not accept these directives
or vector notation.

The use of VFP vector mode is deprecated, and vector notation
is not supported in UAL. To use vector notation, you must use the
pre-UAL VFP mnemonics. See *Pre-UAL VFP mnemonics* for details. You can mix pre-UAL VFP
mnemonics and UAL VFP mnemonics.

You can make assertions about VFP vector lengths and strides in your code, and have them checked by the assembler. See:

If you use `VFPASSERT`

directives, you must specify
vector details in all VFP data processing instructions written using
pre-UAL mnemonics. The vector notation is described in *Vector notation*. If you do not
use `VFPASSERT`

directives you must not use this notation.