From 5c7dcb15e0cc98fe9fa5fa25f320f2bdd71187c3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Daniel=20Sch=C3=BCrmann?= Date: Fri, 1 Nov 2019 09:06:26 +0100 Subject: [PATCH] aco: only use single-dword loads/stores for spilling Fixes: 86786999189c43b4a2c8e1c1a18b55cd2f369fff "aco: implement VGPR spilling" Reviewed-by: Rhys Perry --- src/amd/compiler/aco_spill.cpp | 51 +++++++++--------------------------------- 1 file changed, 10 insertions(+), 41 deletions(-) diff --git a/src/amd/compiler/aco_spill.cpp b/src/amd/compiler/aco_spill.cpp index 9f687da..276dcbd 100644 --- a/src/amd/compiler/aco_spill.cpp +++ b/src/amd/compiler/aco_spill.cpp @@ -1291,9 +1291,9 @@ Temp load_scratch_resource(spill_ctx& ctx, Temp& scratch_offset, rsrc_conf |= S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) | S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32); } - /* older generations need element size = 16 bytes. element size removed in GFX9 */ + /* older generations need element size = 4 bytes. element size removed in GFX9 */ if (ctx.program->chip_class <= GFX8) - rsrc_conf |= S_008F0C_ELEMENT_SIZE(3); + rsrc_conf |= S_008F0C_ELEMENT_SIZE(1); return bld.pseudo(aco_opcode::p_create_vector, bld.def(s4), private_segment_buffer, Operand(-1u), @@ -1544,37 +1544,21 @@ void assign_spill_slots(spill_ctx& ctx, unsigned spills_to_vgpr) { } unsigned offset = base_offset + spill_slot * 4; - aco_opcode opcode; + aco_opcode opcode = aco_opcode::buffer_store_dword; assert((*it)->operands[0].isTemp()); Temp temp = (*it)->operands[0].getTemp(); assert(temp.type() == RegType::vgpr && !temp.is_linear()); - switch (temp.size()) { - case 1: opcode = aco_opcode::buffer_store_dword; break; - case 2: opcode = aco_opcode::buffer_store_dwordx2; break; - case 6: temp = bld.tmp(v3); /* fallthrough */ - case 3: opcode = aco_opcode::buffer_store_dwordx3; break; - case 8: temp = bld.tmp(v4); /* fallthrough */ - case 4: opcode = aco_opcode::buffer_store_dwordx4; break; - default: { + if (temp.size() > 1) { Instruction* split{create_instruction(aco_opcode::p_split_vector, Format::PSEUDO, 1, temp.size())}; split->operands[0] = Operand(temp); for (unsigned i = 0; i < temp.size(); i++) split->definitions[i] = bld.def(v1); bld.insert(split); - opcode = aco_opcode::buffer_store_dword; for (unsigned i = 0; i < temp.size(); i++) bld.mubuf(opcode, Operand(), scratch_rsrc, scratch_offset, split->definitions[i].getTemp(), offset + i * 4, false); - continue; - } + } else { + bld.mubuf(opcode, Operand(), scratch_rsrc, scratch_offset, temp, offset, false); } - - if ((*it)->operands[0].size() > 4) { - Temp temp2 = bld.pseudo(aco_opcode::p_split_vector, bld.def(temp.regClass()), Definition(temp), (*it)->operands[0]); - bld.mubuf(opcode, Operand(), scratch_rsrc, scratch_offset, temp2, offset, false); - offset += temp.size() * 4; - } - bld.mubuf(opcode, Operand(), scratch_rsrc, scratch_offset, temp, offset, false); - } else if (sgpr_slot.find(spill_id) != sgpr_slot.end()) { ctx.program->config->spilled_sgprs += (*it)->operands[0].size(); @@ -1629,35 +1613,20 @@ void assign_spill_slots(spill_ctx& ctx, unsigned spills_to_vgpr) { } unsigned offset = base_offset + spill_slot * 4; - aco_opcode opcode; + aco_opcode opcode = aco_opcode::buffer_load_dword; Definition def = (*it)->definitions[0]; - switch (def.size()) { - case 1: opcode = aco_opcode::buffer_load_dword; break; - case 2: opcode = aco_opcode::buffer_load_dwordx2; break; - case 6: def = bld.def(v3); /* fallthrough */ - case 3: opcode = aco_opcode::buffer_load_dwordx3; break; - case 8: def = bld.def(v4); /* fallthrough */ - case 4: opcode = aco_opcode::buffer_load_dwordx4; break; - default: { + if (def.size() > 1) { Instruction* vec{create_instruction(aco_opcode::p_create_vector, Format::PSEUDO, def.size(), 1)}; vec->definitions[0] = def; - opcode = aco_opcode::buffer_load_dword; for (unsigned i = 0; i < def.size(); i++) { Temp tmp = bld.tmp(v1); vec->operands[i] = Operand(tmp); bld.mubuf(opcode, Definition(tmp), Operand(), scratch_rsrc, scratch_offset, offset + i * 4, false); } bld.insert(vec); - continue; - } + } else { + bld.mubuf(opcode, def, Operand(), scratch_rsrc, scratch_offset, offset, false); } - - bld.mubuf(opcode, def, Operand(), scratch_rsrc, scratch_offset, offset, false); - if ((*it)->definitions[0].size() > 4) { - Temp temp2 = bld.mubuf(opcode, bld.def(def.regClass()), Operand(), scratch_rsrc, scratch_offset, offset + def.size() * 4, false); - bld.pseudo(aco_opcode::p_create_vector, (*it)->definitions[0], def.getTemp(), temp2); - } - } else if (sgpr_slot.find(spill_id) != sgpr_slot.end()) { uint32_t spill_slot = sgpr_slot[spill_id]; reload_in_loop[spill_slot / 64] = block.loop_nest_depth > 0; -- 2.7.4