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nir: add load_frag_coord system value intrinsic

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Some drivers prefer to treat gl_FragCoord as a system value rather than
a fragment shader input, see Const.GLSLFragCoordIsSysVal.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Nicolai Hähnle 2017-07-04 10:34:02 +02:00
parent 5011923e09
commit f1da97ef7a
3 changed files with 6 additions and 0 deletions
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4
src/compiler/nir/nir.c
View file

@ -1891,6 +1891,8 @@ nir_intrinsic_from_system_value(gl_system_value val)
return nir_intrinsic_load_base_vertex;
case SYSTEM_VALUE_INVOCATION_ID:
return nir_intrinsic_load_invocation_id;
case SYSTEM_VALUE_FRAG_COORD:
return nir_intrinsic_load_frag_coord;
case SYSTEM_VALUE_FRONT_FACE:
return nir_intrinsic_load_front_face;
case SYSTEM_VALUE_SAMPLE_ID:
@ -1958,6 +1960,8 @@ nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
return SYSTEM_VALUE_BASE_VERTEX;
case nir_intrinsic_load_invocation_id:
return SYSTEM_VALUE_INVOCATION_ID;
case nir_intrinsic_load_frag_coord:
return SYSTEM_VALUE_FRAG_COORD;
case nir_intrinsic_load_front_face:
return SYSTEM_VALUE_FRONT_FACE;
case nir_intrinsic_load_sample_id:

1
src/compiler/nir/nir_gather_info.c
View file

@ -227,6 +227,7 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader)
}
case nir_intrinsic_load_draw_id:
case nir_intrinsic_load_frag_coord:
case nir_intrinsic_load_front_face:
case nir_intrinsic_load_vertex_id:
case nir_intrinsic_load_vertex_id_zero_base:

1
src/compiler/nir/nir_intrinsics.h
View file

@ -322,6 +322,7 @@ INTRINSIC(shared_atomic_comp_swap, 3, ARR(1, 1, 1), true, 1, 0, 1, BASE, xx, xx,
idx0, idx1, idx2, \
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
SYSTEM_VALUE(frag_coord, 4, 0, xx, xx, xx)
SYSTEM_VALUE(front_face, 1, 0, xx, xx, xx)
SYSTEM_VALUE(vertex_id, 1, 0, xx, xx, xx)
SYSTEM_VALUE(vertex_id_zero_base, 1, 0, xx, xx, xx)