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shader_decode: Implement PBK and BRK

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This commit is contained in:
ReinUsesLisp 2018-12-17 17:44:20 -03:00
parent 8f37531f8e
commit becfdb8638
1 changed files with 22 additions and 1 deletions
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23
src/video_core/shader/decode/other.cpp
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@ -64,7 +64,19 @@ u32 ShaderIR::DecodeOther(BasicBlock& bb, u32 pc) {
// The SSY opcode tells the GPU where to re-converge divergent execution paths, it sets the
// target of the jump that the SYNC instruction will make. The SSY opcode has a similar
// structure to the BRA opcode.
bb.push_back(Operation(OperationCode::Ssy, Immediate(pc + instr.bra.GetBranchTarget())));
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(Operation(OperationCode::Ssy, Immediate(target)));
break;
}
case OpCode::Id::PBK: {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer PBK is not supported");
// PBK pushes to a stack the address where BRK will jump to. This shares stack with SSY but
// using SYNC on a PBK address will kill the shader execution. We don't emulate this because
// it's very unlikely a driver will emit such invalid shader.
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(Operation(OperationCode::Pbk, Immediate(target)));
break;
}
case OpCode::Id::SYNC: {
@ -76,6 +88,15 @@ u32 ShaderIR::DecodeOther(BasicBlock& bb, u32 pc) {
bb.push_back(Operation(OperationCode::Sync));
break;
}
case OpCode::Id::BRK: {
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "BRK condition code used: {}",
static_cast<u32>(cc));
// The BRK opcode jumps to the address previously set by the PBK opcode
bb.push_back(Operation(OperationCode::Brk));
break;
}
case OpCode::Id::IPA: {
const auto& attribute = instr.attribute.fmt28;
const Tegra::Shader::IpaMode input_mode{instr.ipa.interp_mode.Value(),