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rsx/fp: Use CFG for fragment program
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kd-11
kd-11
parent
9d92e190eb
commit
cb7650240c
@ -1297,7 +1297,7 @@ bool FragmentProgramDecompiler::handle_tex_srb(u32 opcode)
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std::string FragmentProgramDecompiler::Decompile()
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{
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auto data = static_cast<be_t<u32>*>(m_prog.get_data());
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const auto graph = rsx::assembler::deconstruct_fragment_program(m_prog);
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m_size = 0;
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m_location = 0;
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m_loop_count = 0;
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@ -1314,141 +1314,146 @@ std::string FragmentProgramDecompiler::Decompile()
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int forced_unit = FORCE_NONE;
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while (true)
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for (const auto &block : graph.blocks)
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{
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for (auto found = std::find(m_end_offsets.begin(), m_end_offsets.end(), m_size);
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found != m_end_offsets.end();
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found = std::find(m_end_offsets.begin(), m_end_offsets.end(), m_size))
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// TODO: Handle block prologue if any
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for (const auto& inst : block.instructions)
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{
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m_end_offsets.erase(found);
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m_code_level--;
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AddCode("}");
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m_loop_count--;
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}
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for (auto found = std::find(m_else_offsets.begin(), m_else_offsets.end(), m_size);
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found != m_else_offsets.end();
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found = std::find(m_else_offsets.begin(), m_else_offsets.end(), m_size))
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{
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m_else_offsets.erase(found);
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m_code_level--;
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AddCode("}");
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AddCode("else");
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AddCode("{");
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m_code_level++;
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}
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dst.HEX = GetData(data[0]);
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src0.HEX = GetData(data[1]);
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src1.HEX = GetData(data[2]);
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src2.HEX = GetData(data[3]);
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m_offset = 4 * sizeof(u32);
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opflags = 0;
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const u32 opcode = dst.opcode | (src1.opcode_is_branch << 6);
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auto SIP = [&]()
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{
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switch (opcode)
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for (auto found = std::find(m_end_offsets.begin(), m_end_offsets.end(), m_size);
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found != m_end_offsets.end();
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found = std::find(m_end_offsets.begin(), m_end_offsets.end(), m_size))
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{
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case RSX_FP_OPCODE_BRK:
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if (m_loop_count) AddFlowOp("break");
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else rsx_log.error("BRK opcode found outside of a loop");
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break;
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case RSX_FP_OPCODE_CAL:
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rsx_log.error("Unimplemented SIP instruction: CAL");
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break;
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case RSX_FP_OPCODE_FENCT:
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AddCode("//FENCT");
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forced_unit = FORCE_SCT;
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break;
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case RSX_FP_OPCODE_FENCB:
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AddCode("//FENCB");
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forced_unit = FORCE_SCB;
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break;
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case RSX_FP_OPCODE_IFE:
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AddCode("if($cond)");
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if (src2.end_offset != src1.else_offset)
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m_else_offsets.push_back(src1.else_offset << 2);
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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break;
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case RSX_FP_OPCODE_LOOP:
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if (!src0.exec_if_eq && !src0.exec_if_gr && !src0.exec_if_lt)
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{
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AddCode(fmt::format("//$ifcond for(int i%u = %u; i%u < %u; i%u += %u) {} //-> %u //LOOP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment, src2.end_offset));
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}
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else
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{
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AddCode(fmt::format("$ifcond for(int i%u = %u; i%u < %u; i%u += %u) //LOOP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment));
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m_loop_count++;
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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}
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break;
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case RSX_FP_OPCODE_REP:
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if (!src0.exec_if_eq && !src0.exec_if_gr && !src0.exec_if_lt)
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{
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AddCode(fmt::format("//$ifcond for(int i%u = %u; i%u < %u; i%u += %u) {} //-> %u //REP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment, src2.end_offset));
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}
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else
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{
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AddCode(fmt::format("if($cond) for(int i%u = %u; i%u < %u; i%u += %u) //REP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment));
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m_loop_count++;
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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}
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break;
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case RSX_FP_OPCODE_RET:
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AddFlowOp("return");
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break;
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default:
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return false;
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m_end_offsets.erase(found);
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m_code_level--;
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AddCode("}");
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m_loop_count--;
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}
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return true;
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};
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for (auto found = std::find(m_else_offsets.begin(), m_else_offsets.end(), m_size);
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found != m_else_offsets.end();
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found = std::find(m_else_offsets.begin(), m_else_offsets.end(), m_size))
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{
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m_else_offsets.erase(found);
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m_code_level--;
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AddCode("}");
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AddCode("else");
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AddCode("{");
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m_code_level++;
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}
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switch (opcode)
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{
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case RSX_FP_OPCODE_NOP:
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break;
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case RSX_FP_OPCODE_KIL:
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properties.has_discard_op = true;
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AddFlowOp("_kill()");
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break;
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default:
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int prev_force_unit = forced_unit;
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dst.HEX = inst.bytecode[0];
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src0.HEX = inst.bytecode[1];
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src1.HEX = inst.bytecode[2];
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src2.HEX = inst.bytecode[3];
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// Some instructions do not respect forced unit
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// Tested with Tales of Vesperia
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if (SIP()) break;
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if (handle_tex_srb(opcode)) break;
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m_offset = 4 * sizeof(u32);
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opflags = 0;
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// FENCT/FENCB do not actually reject instructions if they dont match the forced unit
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// Looks like they are optimization hints and not hard-coded forced paths
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if (handle_sct_scb(opcode)) break;
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forced_unit = FORCE_NONE;
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const u32 opcode = dst.opcode | (src1.opcode_is_branch << 6);
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rsx_log.error("Unknown/illegal instruction: 0x%x (forced unit %d)", opcode, prev_force_unit);
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break;
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auto SIP = [&]()
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{
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switch (opcode)
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{
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case RSX_FP_OPCODE_BRK:
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if (m_loop_count) AddFlowOp("break");
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else rsx_log.error("BRK opcode found outside of a loop");
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break;
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case RSX_FP_OPCODE_CAL:
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rsx_log.error("Unimplemented SIP instruction: CAL");
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break;
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case RSX_FP_OPCODE_FENCT:
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AddCode("//FENCT");
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forced_unit = FORCE_SCT;
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break;
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case RSX_FP_OPCODE_FENCB:
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AddCode("//FENCB");
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forced_unit = FORCE_SCB;
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break;
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case RSX_FP_OPCODE_IFE:
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AddCode("if($cond)");
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if (src2.end_offset != src1.else_offset)
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m_else_offsets.push_back(src1.else_offset << 2);
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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break;
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case RSX_FP_OPCODE_LOOP:
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if (!src0.exec_if_eq && !src0.exec_if_gr && !src0.exec_if_lt)
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{
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AddCode(fmt::format("//$ifcond for(int i%u = %u; i%u < %u; i%u += %u) {} //-> %u //LOOP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment, src2.end_offset));
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}
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else
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{
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AddCode(fmt::format("$ifcond for(int i%u = %u; i%u < %u; i%u += %u) //LOOP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment));
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m_loop_count++;
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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}
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break;
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case RSX_FP_OPCODE_REP:
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if (!src0.exec_if_eq && !src0.exec_if_gr && !src0.exec_if_lt)
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{
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AddCode(fmt::format("//$ifcond for(int i%u = %u; i%u < %u; i%u += %u) {} //-> %u //REP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment, src2.end_offset));
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}
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else
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{
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AddCode(fmt::format("if($cond) for(int i%u = %u; i%u < %u; i%u += %u) //REP",
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m_loop_count, src1.init_counter, m_loop_count, src1.end_counter, m_loop_count, src1.increment));
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m_loop_count++;
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m_end_offsets.push_back(src2.end_offset << 2);
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AddCode("{");
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m_code_level++;
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}
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break;
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case RSX_FP_OPCODE_RET:
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AddFlowOp("return");
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break;
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default:
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return false;
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}
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return true;
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};
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switch (opcode)
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{
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case RSX_FP_OPCODE_NOP:
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break;
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case RSX_FP_OPCODE_KIL:
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properties.has_discard_op = true;
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AddFlowOp("_kill()");
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break;
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default:
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int prev_force_unit = forced_unit;
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// Some instructions do not respect forced unit
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// Tested with Tales of Vesperia
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if (SIP()) break;
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if (handle_tex_srb(opcode)) break;
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// FENCT/FENCB do not actually reject instructions if they dont match the forced unit
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// Looks like they are optimization hints and not hard-coded forced paths
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if (handle_sct_scb(opcode)) break;
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forced_unit = FORCE_NONE;
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rsx_log.error("Unknown/illegal instruction: 0x%x (forced unit %d)", opcode, prev_force_unit);
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break;
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}
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m_size += m_offset;
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ensure((m_offset & 15) == 0); // Must be aligned to 16 bytes
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if (dst.end) break;
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}
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m_size += m_offset;
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if (dst.end) break;
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ensure(m_offset % sizeof(u32) == 0);
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data += m_offset / sizeof(u32);
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// TODO: Handle block epilogue if needed
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}
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while (m_code_level > 1)
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