vc4: Switch to actually generating vertex and fragment shader code from TGSI.

This introduces an IR (QIR, for QPU IR) to do optimization on.  It's a
scalar, SSA IR in general.  It looks like optimization is pretty easy this
way, though I haven't figured out if it's going to be good for our weird
register allocation or not (or if I want to reduce to basically QPU
instructions first), and I've got some problems with it having some
multi-QPU-instruction opcodes (SEQ and CMP, for example) which I probably
want to break down.

Of course, this commit mostly doesn't work, since many other things are
still hardwired, like the VBO data.

v2: Rewrite to use a bunch of helpers (qir_OPCODE) for emitting QIR
    instructions into temporary values, and make qir_inst4 take the 4 args
    separately instead of an array (all later callers wanted individual
    args).

1 files changed, 8 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_qpu.c b/src/gallium/drivers/vc4/vc4_qpu.c
index 18863f7..de07f72 100644
--- a/src/gallium/drivers/vc4/vc4_qpu.c
+++ b/src/gallium/drivers/vc4/vc4_qpu.c
@@ -208,3 +208,11 @@ qpu_inst(uint64_t add, uint64_t mul)
 
         return merge;
 }
+
+uint64_t
+qpu_set_sig(uint64_t inst, uint32_t sig)
+{
+        assert(QPU_GET_FIELD(inst, QPU_SIG) == QPU_SIG_NONE);
+        return (inst & ~QPU_SIG_MASK) | QPU_SET_FIELD(sig, QPU_SIG);
+}
+