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v3d: Add support for gl_HelperInvocation.

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We can just look at the MSF flags -- if they're unset, then we're
definitely in a helper invocation.  Fixes
dEQP-GLES31.functional.shaders.helper_invocation.* with GLES3.1 enabled.
This commit is contained in:
Eric Anholt 2018-12-28 11:30:52 -08:00
parent 20021e3473
commit ad1e59cf8d
1 changed files with 8 additions and 0 deletions
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8
src/broadcom/compiler/nir_to_vir.c
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@ -1596,6 +1596,14 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
ntq_store_dest(c, &instr->dest, 0, vir_MSF(c));
break;
case nir_intrinsic_load_helper_invocation:
vir_PF(c, vir_MSF(c), V3D_QPU_PF_PUSHZ);
ntq_store_dest(c, &instr->dest, 0,
vir_MOV(c, vir_SEL(c, V3D_QPU_COND_IFA,
vir_uniform_ui(c, ~0),
vir_uniform_ui(c, 0))));
break;
case nir_intrinsic_load_front_face:
/* The register contains 0 (front) or 1 (back), and we need to
* turn it into a NIR bool where true means front.