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shader_decode: Implement BFE

This commit is contained in:
ReinUsesLisp 2018-12-16 18:19:17 -03:00
parent e444a6553f
commit 501284a81a
1 changed files with 25 additions and 1 deletions
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26
src/video_core/shader/decode/bfe.cpp
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@ -16,7 +16,31 @@ u32 ShaderIR::DecodeBfe(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED();
UNIMPLEMENTED_IF(instr.bfe.negate_b);
Node op_a = GetRegister(instr.gpr8);
op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false);
switch (opcode->get().GetId()) {
case OpCode::Id::BFE_IMM: {
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in BFE is not implemented");
const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue()));
const Node outer_shift_imm =
Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position));
const Node inner_shift =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm);
const Node outer_shift =
Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm);
SetRegister(bb, instr.gpr0, outer_shift);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName());
}
return pc;
}