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shader/r2p: Refactor P2R to support P2R

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This commit is contained in:
ReinUsesLisp 2019-12-20 17:41:27 -03:00
parent 7be65c6a68
commit cf27b59493
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GPG key ID: 2DFC508897B39CFE
2 changed files with 33 additions and 17 deletions
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46
src/video_core/shader/decode/register_set_predicate.cpp
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@ -13,37 +13,51 @@ namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
namespace {
constexpr u64 NUM_PROGRAMMABLE_PREDICATES = 7;
}
u32 ShaderIR::DecodeRegisterSetPredicate(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.r2p.mode != Tegra::Shader::R2pMode::Pr);
UNIMPLEMENTED_IF(instr.p2r_r2p.mode != Tegra::Shader::R2pMode::Pr);
const Node apply_mask = [&]() {
const Node apply_mask = [&] {
switch (opcode->get().GetId()) {
case OpCode::Id::R2P_IMM:
return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
case OpCode::Id::P2R_IMM:
return Immediate(static_cast<u32>(instr.p2r_r2p.immediate_mask));
default:
UNREACHABLE();
return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
return Immediate(0);
}
}();
const Node mask = GetRegister(instr.gpr8);
const auto offset = static_cast<u32>(instr.r2p.byte) * 8;
constexpr u32 programmable_preds = 7;
for (u64 pred = 0; pred < programmable_preds; ++pred) {
const auto shift = static_cast<u32>(pred);
switch (opcode->get().GetId()) {
case OpCode::Id::R2P_IMM: {
const Node mask = GetRegister(instr.gpr8);
const auto offset = static_cast<u32>(instr.p2r_r2p.byte) * 8;
const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
const Node condition =
Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
for (u64 pred = 0; pred < NUM_PROGRAMMABLE_PREDICATES; ++pred) {
const auto shift = static_cast<u32>(pred);
const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
const Node value = Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
const Node condition =
Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
bb.push_back(Conditional(condition, {code}));
const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
const Node value =
Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
bb.push_back(Conditional(condition, {code}));
}
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled P2R/R2R instruction: {}", opcode->get().GetName());
break;
}
return pc;