From a16621748028057aa78ddd71ea8e478162212073 Mon Sep 17 00:00:00 2001 From: Nguyen Dac Nam Date: Fri, 13 Mar 2020 19:01:49 +0700 Subject: shader_decode: implement XMAD mode CSfu --- src/video_core/shader/decode/xmad.cpp | 50 ++++++++++++++++++++++++++++------- 1 file changed, 41 insertions(+), 9 deletions(-) (limited to 'src') diff --git a/src/video_core/shader/decode/xmad.cpp b/src/video_core/shader/decode/xmad.cpp index 206961909..61d23649d 100644 --- a/src/video_core/shader/decode/xmad.cpp +++ b/src/video_core/shader/decode/xmad.cpp @@ -12,6 +12,7 @@ namespace VideoCommon::Shader { using Tegra::Shader::Instruction; using Tegra::Shader::OpCode; +using Tegra::Shader::PredCondition; u32 ShaderIR::DecodeXmad(NodeBlock& bb, u32 pc) { const Instruction instr = {program_code[pc]}; @@ -63,15 +64,18 @@ u32 ShaderIR::DecodeXmad(NodeBlock& bb, u32 pc) { } }(); - op_a = BitfieldExtract(op_a, instr.xmad.high_a ? 16 : 0, 16); + op_a = SignedOperation(OperationCode::IBitfieldExtract, is_signed_a, std::move(op_a), + instr.xmad.high_a ? Immediate(16) : Immediate(0), Immediate(16)); const Node original_b = op_b; - op_b = BitfieldExtract(op_b, is_high_b ? 16 : 0, 16); + op_b = SignedOperation(OperationCode::IBitfieldExtract, is_signed_b, std::move(op_b), + is_high_b ? Immediate(16) : Immediate(0), Immediate(16)); - // TODO(Rodrigo): Use an appropiate sign for this operation - Node product = Operation(OperationCode::IMul, NO_PRECISE, op_a, op_b); + // we already check sign_a and sign_b is difference or not before so just use one in here. + Node product = SignedOperation(OperationCode::IMul, is_signed_a, op_a, op_b); if (is_psl) { - product = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, product, Immediate(16)); + product = + SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_a, product, Immediate(16)); } SetTemporary(bb, 0, product); product = GetTemporary(0); @@ -88,12 +92,40 @@ u32 ShaderIR::DecodeXmad(NodeBlock& bb, u32 pc) { return BitfieldExtract(original_c, 16, 16); case Tegra::Shader::XmadMode::CBcc: { const Node shifted_b = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_b, - NO_PRECISE, original_b, Immediate(16)); - return SignedOperation(OperationCode::IAdd, is_signed_c, NO_PRECISE, original_c, - shifted_b); + original_b, Immediate(16)); + return SignedOperation(OperationCode::IAdd, is_signed_c, original_c, shifted_b); + } + case Tegra::Shader::XmadMode::CSfu: { + const Node comp_a = GetPredicateComparisonInteger(PredCondition::Equal, is_signed_a, + op_a, Immediate(0)); + const Node comp_b = GetPredicateComparisonInteger(PredCondition::Equal, is_signed_b, + op_b, Immediate(0)); + const Node comp = + Operation(OperationCode::LogicalOr, std::move(comp_a), std::move(comp_b)); + + const Node comp_minus_a = GetPredicateComparisonInteger( + PredCondition::NotEqual, is_signed_a, + SignedOperation(OperationCode::IBitwiseAnd, is_signed_a, op_a, + Immediate(0x80000000)), + Immediate(0)); + const Node comp_minus_b = GetPredicateComparisonInteger( + PredCondition::NotEqual, is_signed_b, + SignedOperation(OperationCode::IBitwiseAnd, is_signed_b, op_b, + Immediate(0x80000000)), + Immediate(0)); + + Node new_c = Operation( + OperationCode::Select, comp_minus_a, + SignedOperation(OperationCode::IAdd, is_signed_c, original_c, Immediate(-65536)), + original_c); + new_c = Operation( + OperationCode::Select, comp_minus_b, + SignedOperation(OperationCode::IAdd, is_signed_c, new_c, Immediate(-65536)), new_c); + + return Operation(OperationCode::Select, comp, original_c, new_c); } default: - UNIMPLEMENTED_MSG("Unhandled XMAD mode: {}", static_cast(instr.xmad.mode.Value())); + UNREACHABLE(); return Immediate(0); } }(); -- cgit v1.2.3