radeonsi: Store inputs to memory when not using a TCS.

We need to copy the VS outputs to memory. I decided to do this
using a shader key, as the value depends on other shaders.

I also switch the fixed function TCS over to monolithic, as
otherwisze many of the user SGPR's need to be passed to the
epilog, which increases register pressure, or complexity to
avoid that. The main body of the fixed function TCS is not
that interesting to precompile anyway, since we do it on
demand and it is very small.

v2: Use u_bit_scan64.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index 26be25e..67b457b 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -304,6 +304,7 @@ struct si_vs_epilog_bits {
 /* Common TCS bits between the shader key and the epilog key. */
 struct si_tcs_epilog_bits {
 	unsigned	prim_mode:3;
+	uint64_t	inputs_to_copy;
 };
 
 /* Common PS bits between the shader key and the prolog key. */