disasm-a3xx.c : unknown(4,9)

[metora]

Hello

I try to disassembly shader on Adreno 530, then it show [unknown(4,9)].
And I found [rcp rsq rsqh exp2h log2h sinpb2] in libllvm-qcom.so.
So I guess it has new instructions on Adreno 530.

[robclark]

yes, does look like a new cat4 instruction.. I guess if you have a simple shader that triggers the instruction, and the rest of the disassembled shader, it shouldn't be too hard to figure out what it is.

[metora]

The result I tried.

OPC_RSQH = _OPC(4, 9),
OPC_LOG2H = _OPC(4, 10),
OPC_EXP2H = _OPC(4, 11),

but I don't know what is sinpb2?

[robclark]

rsqh/log2h/exp2h... wonder if those are for half-precision (mediump)? What happens if you try to use highp?

sinpb2, not really sure.. I'd have to see how it is used (ie. asm dump vs glsl)