From 3052eae25e9a35bdffdd72c2598929e6a9c72607 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Fri, 21 Dec 2018 01:57:13 -0300
Subject: [PATCH] shader_decode: Implement F2I
---
src/video_core/shader/decode/conversion.cpp | 37 +++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/src/video_core/shader/decode/conversion.cpp b/src/video_core/shader/decode/conversion.cpp
index 7c691982d7..82fe5e21aa 100644
--- a/src/video_core/shader/decode/conversion.cpp
+++ b/src/video_core/shader/decode/conversion.cpp
@@ -73,6 +73,43 @@ u32 ShaderIR::DecodeConversion(BasicBlock& bb, u32 pc) {
SetRegister(bb, instr.gpr0, value);
break;
}
+ case OpCode::Id::F2I_R:
+ case OpCode::Id::F2I_C: {
+ UNIMPLEMENTED_IF(instr.conversion.src_size != Register::Size::Word);
+ UNIMPLEMENTED_IF_MSG(instr.generates_cc,
+ "Condition codes generation in F2I is not implemented");
+ Node value = [&]() {
+ if (instr.is_b_gpr) {
+ return GetRegister(instr.gpr20);
+ } else {
+ return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
+ }
+ }();
+
+ value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
+
+ value = [&]() {
+ switch (instr.conversion.f2i.rounding) {
+ case Tegra::Shader::F2iRoundingOp::None:
+ return value;
+ case Tegra::Shader::F2iRoundingOp::Floor:
+ return Operation(OperationCode::FFloor, PRECISE, value);
+ case Tegra::Shader::F2iRoundingOp::Ceil:
+ return Operation(OperationCode::FCeil, PRECISE, value);
+ case Tegra::Shader::F2iRoundingOp::Trunc:
+ return Operation(OperationCode::FTrunc, PRECISE, value);
+ default:
+ UNIMPLEMENTED_MSG("Unimplemented F2I rounding mode {}",
+ static_cast<u32>(instr.conversion.f2i.rounding.Value()));
+ }
+ }();
+ const bool is_signed = instr.conversion.is_output_signed;
+ value = SignedOperation(OperationCode::ICastFloat, is_signed, PRECISE, value);
+ value = ConvertIntegerSize(value, instr.conversion.dest_size, is_signed);
+
+ SetRegister(bb, instr.gpr0, value);
+ break;
+ }
default:
UNIMPLEMENTED_MSG("Unhandled conversion instruction: {}", opcode->get().GetName());
}
--
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