`.dcb[``size`] `number` [,`fill`]

This directive emits `number` copies of `fill`, each of `size`
bytes. Both `number` and `fill` are absolute expressions. If the
comma and `fill` are omitted, `fill` is assumed to be zero. The
`size` suffix, if present, must be one of:

`‘`

`.b`’Emits single byte values.

`‘`

`.d`’Emits double-precision floating point values.

`‘`

`.l`’Emits 4-byte values.

`‘`

`.s`’Emits single-precision floating point values.

`‘`

`.w`’Emits 2-byte values.

`‘`

`.x`’Emits long double-precision floating point values.

If the `size` suffix is omitted then ‘`.w`’ is assumed.

The byte ordering is target dependent, as is the size and format of floating point values.