aco: disable sdwa on gfx11

Instead of SDWA v_mov_b32/v_xor_b32, we can use a combination of
v_add_u16/v_sub_u16 (add/sub swap, similar to xor swap) and v_perm_b32
with a literal.

I don't know yet if GFX11 adds any new instructions which makes this
easier, but this approach should have full functionality.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16595>

src/amd/compiler/aco_builder_h.py

@@ -110,6 +110,15 @@ sendmsg_gs_done(bool cut, bool emit, unsigned stream)
     return (sendmsg)((unsigned)_sendmsg_gs_done | (cut << 4) | (emit << 5) | (stream << 8));
 }
 
+enum bperm_swiz {
+   bperm_b1_sign = 8,
+   bperm_b3_sign = 9,
+   bperm_b5_sign = 10,
+   bperm_b7_sign = 11,
+   bperm_0 = 12,
+   bperm_255 = 13,
+};
+
 class Builder {
 public:
    struct Result {