From 21f9e9da092ddd96fe9f149660a5bf4f676c8413 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Tue, 18 Dec 2018 19:54:12 -0300
Subject: [PATCH] shader_decode: Implement HSETP2
---
.../shader/decode/half_set_predicate.cpp | 38 ++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)
diff --git a/src/video_core/shader/decode/half_set_predicate.cpp b/src/video_core/shader/decode/half_set_predicate.cpp
index 5fe123ea52..d7d63d50a4 100644
--- a/src/video_core/shader/decode/half_set_predicate.cpp
+++ b/src/video_core/shader/decode/half_set_predicate.cpp
@@ -11,12 +11,48 @@ namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
+using Tegra::Shader::Pred;
u32 ShaderIR::DecodeHalfSetPredicate(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED();
+ UNIMPLEMENTED_IF(instr.hsetp2.ftz != 0);
+
+ Node op_a = GetRegister(instr.gpr8);
+ op_a = GetOperandAbsNegHalf(op_a, instr.hsetp2.abs_a, instr.hsetp2.negate_a);
+
+ const Node op_b = [&]() {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::HSETP2_R:
+ return GetOperandAbsNegHalf(GetRegister(instr.gpr20), instr.hsetp2.abs_a,
+ instr.hsetp2.negate_b);
+ default:
+ UNREACHABLE();
+ return Immediate(0);
+ }
+ }();
+
+ // We can't use the constant predicate as destination.
+ ASSERT(instr.hsetp2.pred3 != static_cast<u64>(Pred::UnusedIndex));
+
+ const Node second_pred = GetPredicate(instr.hsetp2.pred39, instr.hsetp2.neg_pred != 0);
+
+ const OperationCode combiner = GetPredicateCombiner(instr.hsetp2.op);
+
+ MetaHalfArithmetic meta = {
+ false, {instr.hsetp2.type_a, instr.hsetp2.type_b}, instr.hsetp2.h_and != 0};
+ const Node first_pred = GetPredicateComparisonHalf(instr.hsetp2.cond, meta, op_a, op_b);
+
+ // Set the primary predicate to the result of Predicate OP SecondPredicate
+ const Node value = Operation(combiner, first_pred, second_pred);
+ SetPredicate(bb, instr.hsetp2.pred3, value);
+
+ if (instr.hsetp2.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
+ // Set the secondary predicate to the result of !Predicate OP SecondPredicate, if enabled
+ const Node negated_pred = Operation(OperationCode::LogicalNegate, first_pred);
+ SetPredicate(bb, instr.hsetp2.pred0, Operation(combiner, negated_pred, second_pred));
+ }
return pc;
}