From a7d6bd1ef1cdd2ca406e2ded31f872dda4da0db3 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Wed, 18 Dec 2019 00:05:08 -0300 Subject: shader/conversion: Implement byte selector in I2F I2F's byte selector is used to choose what bytes to convert to float. e.g. if the input is 0xaabbccdd and the selector is ".B3" it will convert 0xaa. The default (when it's not shown in nvdisasm) is ".B0", in that example the default would convert 0xdd to float. --- src/video_core/shader/decode/conversion.cpp | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'src/video_core/shader/decode') diff --git a/src/video_core/shader/decode/conversion.cpp b/src/video_core/shader/decode/conversion.cpp index 32facd6ba..0eeb75559 100644 --- a/src/video_core/shader/decode/conversion.cpp +++ b/src/video_core/shader/decode/conversion.cpp @@ -63,12 +63,11 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) { case OpCode::Id::I2F_R: case OpCode::Id::I2F_C: case OpCode::Id::I2F_IMM: { - UNIMPLEMENTED_IF(instr.conversion.int_src.selector != 0); UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long); UNIMPLEMENTED_IF_MSG(instr.generates_cc, "Condition codes generation in I2F is not implemented"); - Node value = [&]() { + Node value = [&] { switch (opcode->get().GetId()) { case OpCode::Id::I2F_R: return GetRegister(instr.gpr20); @@ -81,7 +80,19 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) { return Immediate(0); } }(); + const bool input_signed = instr.conversion.is_input_signed; + + if (instr.conversion.src_size == Register::Size::Byte) { + const u32 offset = static_cast(instr.conversion.int_src.selector) * 8; + if (offset > 0) { + value = SignedOperation(OperationCode::ILogicalShiftRight, input_signed, + std::move(value), Immediate(offset)); + } + } else { + UNIMPLEMENTED_IF(instr.conversion.int_src.selector != 0); + } + value = ConvertIntegerSize(value, instr.conversion.src_size, input_signed); value = GetOperandAbsNegInteger(value, instr.conversion.abs_a, false, input_signed); value = SignedOperation(OperationCode::FCastInteger, input_signed, PRECISE, value); -- cgit v1.2.3