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Annotate noexcept and constexpr with HEDLEY, and add interval containment, ChaCha, and the dyadic range tables.

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Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Ryan Henry 2026-09-24 20:44:07 -06:00
parent 875f09fec1
commit 0d8a5a8131
97 changed files with 9212 additions and 1159 deletions
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52
test/tests/signed_prefix_test.cpp
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@ -6,6 +6,7 @@
#include <array>
#include <cstdint>
#include <limits>
#include <vector>
namespace
@ -141,3 +142,54 @@ TEST(SignedPrefix, RejectsAKeyWithoutAComparison)
EXPECT_THROW(grotto::signed_prefix_parities(k0, ends), std::invalid_argument);
EXPECT_THROW(grotto::signed_segment_parities(k1, ends), std::invalid_argument);
}
template <std::size_t N>
void expect_ilogb_segments(const grotto::constant_lut<int8_t> & lut, int8_t alpha)
{
if (lut.bounds.size() != N)
return;
std::array<int8_t, N> ends{};
for (std::size_t i = 0; i < N; ++i)
ends[i] = lut.bounds[i];
auto [k0, k1] = dpf::make_dpf(alpha, dpf::gt(uint64_t{1}));
const uint64_t mask = k0.cmp().mask;
const auto s0 = grotto::signed_segment_parities(k0, ends);
const auto s1 = grotto::signed_segment_parities(k1, ends);
uint64_t acc = 0;
for (std::size_t i = 0; i < N; ++i)
{
const uint64_t bit = opened(s0[i], s1[i], mask);
acc += bit * static_cast<uint64_t>(lut.values[i]);
}
EXPECT_EQ(acc, static_cast<uint64_t>(lut(alpha))) << int(alpha);
}
template <std::size_t N>
void dispatch_ilogb(const grotto::constant_lut<int8_t> & lut, int8_t alpha, bool & matched)
{
if (lut.bounds.size() == N)
{
expect_ilogb_segments<N>(lut, alpha);
matched = true;
return;
}
if constexpr (N > 1)
dispatch_ilogb<N - 1>(lut, alpha, matched);
}
TEST(SignedPrefix, SegmentsRecoverIlogbInt8)
{
for (unsigned frac : {0u, 4u})
{
const auto lut = grotto::make_exact_constant_lut<int8_t>(
grotto::exact_constant::ilogb, frac);
ASSERT_GE(lut.bounds.size(), 3u);
ASSERT_LE(lut.bounds.size(), 40u);
for (int v = -128; v <= 127; ++v)
{
bool matched = false;
dispatch_ilogb<40>(lut, static_cast<int8_t>(v), matched);
ASSERT_TRUE(matched) << lut.bounds.size();
}
}
}