Based on observations of the generated assembly, this instruction appears to:
- Swizzle the 8/16 component vector in src0 according to the pattern defined in src1.
- Apply a enable mask from src2 to selectively modify elements.
I encountered this instruction while experimenting with _viv_asm and
packed types.
Here is one exmaple kernel:
kernel void k(global int* out, int a, int b) {
_viv_char2_packed s;
_viv_asm(MOV, s.x, s, a);
_viv_asm(MOV, s.y, s, b);
out[0] = s.x + s.y;
}
Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33474>
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