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vfp: Add decoders for VFPv5

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These instructions were introduced in the Cortex-M7
This commit is contained in:
MerryMage
2020-06-19 19:24:05 +01:00
parent 55c021fe82
commit 4df3b2f97f
2 changed files with 25 additions and 4 deletions
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24
src/frontend/A32/decoder/vfp.h
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@@ -22,16 +22,32 @@ using VFPMatcher = Decoder::Matcher<Visitor, u32>;
template<typename V>
std::optional<std::reference_wrapper<const VFPMatcher<V>>> DecodeVFP(u32 instruction) {
static const std::vector<VFPMatcher<V>> table = {
using Table = std::vector<VFPMatcher<V>>;
static const struct Tables {
Table unconditional;
Table conditional;
} tables = []{
Table list = {
#define INST(fn, name, bitstring) Decoder::detail::detail<VFPMatcher<V>>::GetMatcher(&V::fn, name, bitstring),
#include "vfp.inc"
#undef INST
};
};
if ((instruction & 0xF0000000) == 0xF0000000)
return std::nullopt; // Don't try matching any unconditional instructions.
const auto division = std::stable_partition(list.begin(), list.end(), [&](const auto& matcher) {
return (matcher.GetMask() & 0xF0000000) == 0xF0000000;
});
return Tables{
Table{list.begin(), division},
Table{division, list.end()},
};
}();
const bool is_unconditional = (instruction & 0xF0000000) == 0xF0000000;
const Table& table = is_unconditional ? tables.unconditional : tables.conditional;
const auto matches_instruction = [instruction](const auto& matcher){ return matcher.Matches(instruction); };