forked from suyu/suyu
58 lines
No EOL
2 KiB
C++
58 lines
No EOL
2 KiB
C++
// Copyright 2018 yuzu Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include "common/assert.h"
|
|
#include "common/common_types.h"
|
|
#include "video_core/engines/shader_bytecode.h"
|
|
#include "video_core/shader/shader_ir.h"
|
|
|
|
namespace VideoCommon::Shader {
|
|
|
|
using Tegra::Shader::Instruction;
|
|
using Tegra::Shader::OpCode;
|
|
|
|
u32 ShaderIR::DecodeFloatSet(NodeBlock& bb, u32 pc) {
|
|
const Instruction instr = {program_code[pc]};
|
|
const auto opcode = OpCode::Decode(instr);
|
|
|
|
const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fset.abs_a != 0,
|
|
instr.fset.neg_a != 0);
|
|
|
|
Node op_b = [&]() {
|
|
if (instr.is_b_imm) {
|
|
return GetImmediate19(instr);
|
|
} else if (instr.is_b_gpr) {
|
|
return GetRegister(instr.gpr20);
|
|
} else {
|
|
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset());
|
|
}
|
|
}();
|
|
|
|
op_b = GetOperandAbsNegFloat(op_b, instr.fset.abs_b != 0, instr.fset.neg_b != 0);
|
|
|
|
// The fset 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.fset.pred39, instr.fset.neg_pred != 0);
|
|
|
|
const OperationCode combiner = GetPredicateCombiner(instr.fset.op);
|
|
const Node first_pred = GetPredicateComparisonFloat(instr.fset.cond, op_a, op_b);
|
|
|
|
const Node predicate = Operation(combiner, first_pred, second_pred);
|
|
|
|
const Node true_value = instr.fset.bf ? Immediate(1.0f) : Immediate(-1);
|
|
const Node false_value = instr.fset.bf ? Immediate(0.0f) : Immediate(0);
|
|
const Node value =
|
|
Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
|
|
|
|
if (instr.fset.bf) {
|
|
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
|
|
} else {
|
|
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
|
|
}
|
|
SetRegister(bb, instr.gpr0, value);
|
|
|
|
return pc;
|
|
}
|
|
|
|
} // namespace VideoCommon::Shader
|