radv: flush f32->f16 conversion denormals to zero. (v2)
SPIR-V defines the f32->f16 operation as flushing denormals to 0,
this compares the class using amd class opcode.
Thanks to Matt Arsenault for figuring it out.
This fix is VI+ only, add a TODO for SI/CIK.
This fixes:
dEQP-VK.spirv_assembly.instruction.compute.opquantize.flush_to_zero
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit
83e58b036e1c34f26c99d04615df2b530f3045d9)
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