where can I find zero-masking in AVX-512 instruction?

[yangyixiaof]

For instructions with zero-masking as follows:

vsubps ymm0 {k4}{z}, ymm1, ymm2

I cannot find {z} in any opnd. That instruction is described in MASM page.
If instruction has {z}, the 'should not sub float part' controled by {k4} should be set to zero, otherwise, remain unchanged.
I think this {z} is important when handling instructions, especially for taint analysis, so does {z} is not supported by current DynamoRIO?

[ivankyluk]

Please use the users list https://groups.google.com/forum/#!forum/DynamoRIO-Users for general questions, as it will reach a wider audience of people who might have an answer, and it will reach other users who may find the information beneficial. The issue tracker is for specific detailed bugs.

[derekbruening]

Looks like a dup of #5488