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[libc][math] Improve the performance of sqrtf128. #122578

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Merged
merged 6 commits into from
Feb 13, 2025
Merged

[libc][math] Improve the performance of sqrtf128. #122578

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c1e3334
[libc][math] Improve the performance of sqrtf128.
lntue Jan 11, 2025
b4d2045
Address comments.
lntue Feb 11, 2025
18a9a58
Add small table option.
lntue Feb 11, 2025
c724330
Address comment on tests.
lntue Feb 11, 2025
05cc1dc
Address comments.
lntue Feb 11, 2025
9b17e18
Add TODO.
lntue Feb 11, 2025
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2 changes: 1 addition & 1 deletion libc/src/__support/big_int.h
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Original file line number Diff line number Diff line change
Expand Up @@ -241,7 +241,7 @@ LIBC_INLINE constexpr void quick_mul_hi(cpp::array<word, N> &dst,
}

template <typename word, size_t N>
LIBC_INLINE constexpr bool is_negative(cpp::array<word, N> &array) {
LIBC_INLINE constexpr bool is_negative(const cpp::array<word, N> &array) {
using signed_word = cpp::make_signed_t<word>;
return cpp::bit_cast<signed_word>(array.back()) < 0;
}
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5 changes: 5 additions & 0 deletions libc/src/math/generic/CMakeLists.txt
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Expand Up @@ -2978,6 +2978,11 @@ add_entrypoint_object(
HDRS
../sqrtf128.h
DEPENDS
libc.src.__support.CPP.bit
libc.src.__support.FPUtil.fenv_impl
libc.src.__support.FPUtil.fp_bits
libc.src.__support.FPUtil.rounding_mode
libc.src.__support.macros.optimization
libc.src.__support.macros.properties.types
libc.src.__support.FPUtil.sqrt
)
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