agx: Pack control flow instructions

Nearly ALU.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11023>

src/asahi/compiler/agx_pack.c

@@ -260,6 +260,10 @@ agx_pack_alu(struct util_dynarray *emission, agx_instr *I)
 
       raw |= (D & BITFIELD_MASK(8)) << 7;
       extend |= ((D >> 8) << extend_offset);
+   } else if (info.immediates & AGX_IMMEDIATE_NEST) {
+      raw |= (I->invert_cond << 8);
+      raw |= (I->nest << 11);
+      raw |= (I->icond << 13);
    }
 
    for (unsigned s = 0; s < info.nr_srcs; ++s) {