diff --git a/src/amd/compiler/aco_instruction_selection.cpp b/src/amd/compiler/aco_instruction_selection.cpp index 50efb2e8543..6d3e1ca52c3 100644 --- a/src/amd/compiler/aco_instruction_selection.cpp +++ b/src/amd/compiler/aco_instruction_selection.cpp @@ -8232,6 +8232,13 @@ void visit_intrinsic(isel_context *ctx, nir_intrinsic_instr *instr) get_ssa_temp(ctx, &instr->dest.ssa)); break; } + case nir_intrinsic_last_invocation: { + Temp flbit = bld.sop1(Builder::s_flbit_i32, bld.def(s1), Operand(exec, bld.lm)); + Temp last = bld.sop2(aco_opcode::s_sub_i32, bld.def(s1), bld.def(s1, scc), + Operand(ctx->program->wave_size - 1u), flbit); + emit_wqm(ctx, last, get_ssa_temp(ctx, &instr->dest.ssa)); + break; + } case nir_intrinsic_elect: { Temp first = bld.sop1(Builder::s_ff1_i32, bld.def(s1), Operand(exec, bld.lm)); emit_wqm(ctx, bld.sop2(Builder::s_lshl, bld.def(bld.lm), bld.def(s1, scc), Operand(1u), first),