NEON pack vector compare result into bitmap

Question

I have a comparison result of comparison of two floating point operands as follows; What I need to do is based on the result of comparison need to perform the following: i.e

Answer 1

vmov.i32 qmask, #1
vand qres, qmask, qres
vsra.u64 qres, qres, #30
vsli.64 dres_bottom, dres_top, #2

And you have the bits you need at the four least significant bits of qres.

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An improved version of above:

vshr.u64 qres, qres, #31
vsli.64 dres_bot, dres_top, #2
// the four LSBs already contain the bitmap, the rest is optional:
vbic.i16 dres_bot, #0xf0
// you can now use byte 0 of dres_bot as the result.