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aco: adjust NGG if provoking vertex mode is last

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10449>
This commit is contained in:
Samuel Pitoiset 2021-04-21 09:40:24 +02:00 • committed by Marge Bot
parent 937a18a6af
commit 4c2add8cba
1 changed files with 16 additions and 4 deletions
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20
src/amd/compiler/aco_instruction_selection.cpp
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@ -11283,7 +11283,13 @@ void ngg_nogs_export_primitives(isel_context *ctx)
if (ctx->stage == vertex_ngg && ctx->args->options->key.vs_common_out.export_prim_id) {
/* Copy Primitive IDs from GS threads to the LDS address corresponding to the ES thread of the provoking vertex. */
Temp prim_id = get_arg(ctx, ctx->args->ac.gs_prim_id);
Temp provoking_vtx_index = vtxindex[0];
unsigned provoking_vtx_in_prim = 0;
/* For provoking vertex last mode, use num_vtx_in_prim - 1. */
if (ctx->args->options->key.vs.provoking_vtx_last)
provoking_vtx_in_prim = ctx->args->options->key.vs.outprim;
Temp provoking_vtx_index = vtxindex[provoking_vtx_in_prim];
Temp addr = bld.v_mul_imm(bld.def(v1), provoking_vtx_index, 4u);
store_lds(ctx, 4, prim_id, 0x1u, addr, 0u, 4u);
@ -11609,11 +11615,17 @@ void ngg_gs_export_primitives(isel_context *ctx, Temp max_prmcnt, Temp tid_in_tg
* We already have triangles due to how we set the primitive flags, but we need to
* make sure the vertex order is so that the front/back is correct, and the provoking vertex is kept.
*/
bool flatshade_first = !ctx->args->options->key.vs.provoking_vtx_last;
/* If the primitive is odd, this will increment indices[1] and decrement indices[2] */
/* If the triangle is odd, this will swap its two non-provoking vertices. */
Temp is_odd = bld.vop3(aco_opcode::v_bfe_u32, bld.def(v1), Operand(prim_flag_0), Operand(1u), Operand(1u));
indices[1] = bld.vadd32(bld.def(v1), indices[1], Operand(is_odd));
indices[2] = bld.vsub32(bld.def(v1), indices[2], Operand(is_odd));
if (flatshade_first) {
indices[1] = bld.vadd32(bld.def(v1), indices[1], Operand(is_odd));
indices[2] = bld.vsub32(bld.def(v1), indices[2], Operand(is_odd));
} else {
indices[0] = bld.vadd32(bld.def(v1), indices[0], Operand(is_odd));
indices[1] = bld.vsub32(bld.def(v1), indices[1], Operand(is_odd));
}
}
ngg_emit_prim_export(ctx, total_vtx_per_prim, indices, is_null_prim);