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gl_shader_decompiler: Implement XMAD instruction.

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This commit is contained in:
bunnei 2018-08-12 16:51:32 -04:00
parent 424e90f0f5
commit 534abf9d97
2 changed files with 120 additions and 4 deletions
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95
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -376,6 +376,8 @@ public:
return value;
} else if (type == GLSLRegister::Type::Integer) {
return "floatBitsToInt(" + value + ')';
} else if (type == GLSLRegister::Type::UnsignedInteger) {
return "floatBitsToUint(" + value + ')';
} else {
UNREACHABLE();
}
@ -1630,6 +1632,99 @@ private:
}
break;
}
case OpCode::Type::Xmad: {
ASSERT_MSG(!instr.xmad.sign_a, "Unimplemented");
ASSERT_MSG(!instr.xmad.sign_b, "Unimplemented");
std::string op_a{regs.GetRegisterAsInteger(instr.gpr8, 0, instr.xmad.sign_a)};
std::string op_b;
std::string op_c;
// TODO(bunnei): Needs to be fixed once op_a or op_b is signed
ASSERT_MSG(instr.xmad.sign_a == instr.xmad.sign_b, "Unimplemented");
const bool is_signed{instr.xmad.sign_a == 1};
bool is_merge{};
switch (opcode->GetId()) {
case OpCode::Id::XMAD_CR: {
is_merge = instr.xmad.merge_56;
op_b += regs.GetUniform(instr.cbuf34.index, instr.cbuf34.offset,
instr.xmad.sign_b ? GLSLRegister::Type::Integer
: GLSLRegister::Type::UnsignedInteger);
op_c += regs.GetRegisterAsInteger(instr.gpr39, 0, is_signed);
break;
}
case OpCode::Id::XMAD_RR: {
is_merge = instr.xmad.merge_37;
op_b += regs.GetRegisterAsInteger(instr.gpr20, 0, instr.xmad.sign_b);
op_c += regs.GetRegisterAsInteger(instr.gpr39, 0, is_signed);
break;
}
case OpCode::Id::XMAD_RC: {
op_b += regs.GetRegisterAsInteger(instr.gpr39, 0, instr.xmad.sign_b);
op_c += regs.GetUniform(instr.cbuf34.index, instr.cbuf34.offset,
is_signed ? GLSLRegister::Type::Integer
: GLSLRegister::Type::UnsignedInteger);
break;
}
case OpCode::Id::XMAD_IMM: {
is_merge = instr.xmad.merge_37;
op_b += std::to_string(instr.xmad.imm20_16);
op_c += regs.GetRegisterAsInteger(instr.gpr39, 0, is_signed);
break;
}
default: {
LOG_CRITICAL(HW_GPU, "Unhandled XMAD instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
// TODO(bunnei): Ensure this is right with signed operands
if (instr.xmad.high_a) {
op_a = "((" + op_a + ") >> 16)";
} else {
op_a = "((" + op_a + ") & 0xFFFF)";
}
std::string src2 = '(' + op_b + ')'; // Preserve original source 2
if (instr.xmad.high_b) {
op_b = '(' + src2 + " >> 16)";
} else {
op_b = '(' + src2 + " & 0xFFFF)";
}
std::string product = '(' + op_a + " * " + op_b + ')';
if (instr.xmad.product_shift_left) {
product = '(' + product + " << 16)";
}
switch (instr.xmad.mode) {
case Tegra::Shader::XmadMode::None:
break;
case Tegra::Shader::XmadMode::CLo:
op_c = "((" + op_c + ") & 0xFFFF)";
break;
case Tegra::Shader::XmadMode::CHi:
op_c = "((" + op_c + ") >> 16)";
break;
case Tegra::Shader::XmadMode::CBcc:
op_c = "((" + op_c + ") + (" + src2 + "<< 16))";
break;
default: {
LOG_CRITICAL(HW_GPU, "Unhandled XMAD mode: {}",
static_cast<u32>(instr.xmad.mode.Value()));
UNREACHABLE();
}
}
std::string sum{'(' + product + " + " + op_c + ')'};
if (is_merge) {
sum = "((" + sum + " & 0xFFFF) | (" + src2 + "<< 16))";
}
regs.SetRegisterToInteger(instr.gpr0, is_signed, 0, sum, 1, 1);
break;
}
default: {
switch (opcode->GetId()) {
case OpCode::Id::EXIT: {