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-rw-r--r--src/video_core/shader/decode/integer_set.cpp28
1 files changed, 27 insertions, 1 deletions
diff --git a/src/video_core/shader/decode/integer_set.cpp b/src/video_core/shader/decode/integer_set.cpp
index 316a7d8ad..eba1c5123 100644
--- a/src/video_core/shader/decode/integer_set.cpp
+++ b/src/video_core/shader/decode/integer_set.cpp
@@ -16,7 +16,33 @@ u32 ShaderIR::DecodeIntegerSet(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED();
+ const Node op_a = GetRegister(instr.gpr8);
+ const Node op_b = [&]() {
+ if (instr.is_b_imm) {
+ return Immediate(instr.alu.GetSignedImm20_20());
+ } else if (instr.is_b_gpr) {
+ return GetRegister(instr.gpr20);
+ } else {
+ return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
+ }
+ }();
+
+ // The iset instruction sets a register to 1.0 or -1 (depending on the bf bit) if the condition
+ // is true, and to 0 otherwise.
+ const Node second_pred = GetPredicate(instr.iset.pred39, instr.iset.neg_pred != 0);
+ const Node first_pred =
+ GetPredicateComparisonInteger(instr.iset.cond, instr.iset.is_signed, op_a, op_b);
+
+ const OperationCode combiner = GetPredicateCombiner(instr.iset.op);
+
+ const Node predicate = Operation(combiner, first_pred, second_pred);
+
+ const Node true_value = instr.iset.bf ? Immediate(1.0f) : Immediate(-1);
+ const Node false_value = instr.iset.bf ? Immediate(0.0f) : Immediate(0);
+ const Node value =
+ Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
+
+ SetRegister(bb, instr.gpr0, value);
return pc;
}