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Kernel: Implement AML FindSet{Left,Right}Bit

This commit is contained in:
Bananymous 2025-04-01 22:56:09 +03:00
parent 1c1fc65c7c
commit 28ac6c2267
1 changed files with 46 additions and 0 deletions
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46
kernel/kernel/ACPI/AML/Node.cpp
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@ -1425,6 +1425,49 @@ namespace Kernel::ACPI::AML
return result;
}
static BAN::ErrorOr<Node> parse_find_set_bit_op(ParseContext& context)
{
dprintln_if(AML_DUMP_FUNCTION_CALLS, "parse_find_set_bit_op");
ASSERT(!context.aml_data.empty());
const auto opcode = context.aml_data[0];
context.aml_data = context.aml_data.slice(1);
uint64_t (*function)(uint64_t) = nullptr;
switch (static_cast<AML::Byte>(opcode))
{
case AML::Byte::FindSetLeftBitOp:
function = [](uint64_t a) -> uint64_t {
for (int i = 63; i >= 0; i--)
if ((a >> i) & 1)
return i + 1;
return 0;
};
break;
case AML::Byte::FindSetRightBitOp:
function = [](uint64_t a) -> uint64_t {
for (int i = 0; i < 64; i++)
if ((a >> i) & 1)
return i + 1;
return 0;
};
break;
default:
ASSERT_NOT_REACHED();
}
auto value = TRY(convert_node(TRY(parse_node(context)), ConvInteger, sizeof(uint64_t)));
Node result {};
result.type = Node::Type::Integer;
result.as.integer.value = function(value.as.integer.value);
TRY(store_into_target(context, result));
return result;
}
static BAN::ErrorOr<Node> parse_mid_op(ParseContext& context)
{
dprintln_if(AML_DUMP_FUNCTION_CALLS, "parse_mid_op");
@ -2816,6 +2859,9 @@ namespace Kernel::ACPI::AML
case AML::Byte::LNotOp:
case AML::Byte::LOrOp:
return TRY(parse_logical_op(context));
case AML::Byte::FindSetLeftBitOp:
case AML::Byte::FindSetRightBitOp:
return TRY(parse_find_set_bit_op(context));
case AML::Byte::Local0:
case AML::Byte::Local1:
case AML::Byte::Local2: