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AK: Remove rsqrt()

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At least on arm64, this isn't very preciese:
https://github.com/SerenityOS/serenity/issues/22739#issuecomment-1912909835

It is also now unused.
This commit is contained in:
Nico Weber 2024-01-29 13:31:39 -05:00 committed by Jelle Raaijmakers
parent 1ed9e597a9
commit a1f70b39fa
Notes: sideshowbarker 2024-07-18 03:23:00 +09:00 
Author: https://github.com/nico
Commit: https://github.com/SerenityOS/serenity/commit/a1f70b39fa
Pull-request: https://github.com/SerenityOS/serenity/pull/22996
1 changed files with 0 additions and 17 deletions
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17
AK/Math.h
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@ -502,23 +502,6 @@ constexpr T sqrt(T x)
#endif
}
template<FloatingPoint T>
constexpr T rsqrt(T x)
{
#if ARCH(AARCH64)
AARCH64_INSTRUCTION(frsqrte, x);
#elif ARCH(X86_64)
if constexpr (IsSame<T, float>) {
float res;
asm("rsqrtss %1, %0"
: "=x"(res)
: "x"(x));
return res;
}
#endif
return (T)1. / sqrt(x);
}
template<FloatingPoint T>
constexpr T cbrt(T x)
{