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nir: Define system values for vc4's blending-lowering arguments.

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In the GLSL-to-NIR conversion of VC4, I had a bit of trouble with what I
was calling the "state uniforms" that I was putting into the NIR fighting
with its other lowering passes.  Instead of using magic uniform base
numbers in the backend, follow the lead of load_user_clip_plane and just
define system values for them.

v2: Fix unintended change to channel_num, drop unspecified const_index
    value on blend_const_color_r_float.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt
2016-07-26 17:31:44 -07:00
parent 475ce61d1a
commit e8378fee0c
5 changed files with 63 additions and 46 deletions
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9
src/compiler/nir/nir_intrinsics.h
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@@ -310,6 +310,15 @@ SYSTEM_VALUE(user_clip_plane, 4, 1, UCP_ID, xx, xx)
SYSTEM_VALUE(num_work_groups, 3, 0, xx, xx, xx)
SYSTEM_VALUE(helper_invocation, 1, 0, xx, xx, xx)
SYSTEM_VALUE(channel_num, 1, 0, xx, xx, xx)
SYSTEM_VALUE(alpha_ref_float, 1, 0, xx, xx, xx)
/* Blend constant color values. Float values are clamped. */
SYSTEM_VALUE(blend_const_color_r_float, 1, 0, xx, xx, xx)
SYSTEM_VALUE(blend_const_color_g_float, 1, 0, xx, xx, xx)
SYSTEM_VALUE(blend_const_color_b_float, 1, 0, xx, xx, xx)
SYSTEM_VALUE(blend_const_color_a_float, 1, 0, xx, xx, xx)
SYSTEM_VALUE(blend_const_color_rgba8888_unorm, 1, 0, xx, xx, xx)
SYSTEM_VALUE(blend_const_color_aaaa8888_unorm, 1, 0, xx, xx, xx)
/**
* Barycentric coordinate intrinsics.