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zink: implement load_vertex_id

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Not 100% sure if this matches the semantics, but it seems to pass the
tests, so it seems like an improvement.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Erik Faye-Lund
2020-01-03 12:21:02 +01:00
parent 1b2731f268
commit e51bf4914c
1 changed files with 21 additions and 1 deletions
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src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
+21 -1
View File
@@ -56,7 +56,7 @@ struct ntv_context {
bool block_started;
SpvId loop_break, loop_cont;
SpvId front_face_var;
SpvId front_face_var, vertex_id_var;
};
static SpvId
@@ -1280,6 +1280,22 @@ emit_load_front_face(struct ntv_context *ctx, nir_intrinsic_instr *intr)
store_dest_uint(ctx, &intr->dest, result);
}
static void
emit_load_vertex_id(struct ntv_context *ctx, nir_intrinsic_instr *intr)
{
SpvId var_type = spirv_builder_type_uint(&ctx->builder, 32);
if (!ctx->vertex_id_var)
ctx->vertex_id_var = create_builtin_var(ctx, var_type,
SpvStorageClassInput,
"gl_VertexID",
SpvBuiltInVertexIndex);
SpvId result = spirv_builder_emit_load(&ctx->builder, var_type,
ctx->vertex_id_var);
assert(1 == nir_dest_num_components(intr->dest));
store_dest_uint(ctx, &intr->dest, result);
}
static void
emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
{
@@ -1304,6 +1320,10 @@ emit_intrinsic(struct ntv_context *ctx, nir_intrinsic_instr *intr)
emit_load_front_face(ctx, intr);
break;
case nir_intrinsic_load_vertex_id:
emit_load_vertex_id(ctx, intr);
break;
default:
fprintf(stderr, "emit_intrinsic: not implemented (%s)\n",
nir_intrinsic_infos[intr->intrinsic].name);