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LibM: Add naive implementation of copysign()

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This commit is contained in:
Andreas Kling 2021-03-05 20:46:25 +01:00
parent fc5b252010
commit 9f8a9dba0b
2 changed files with 13 additions and 0 deletions
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11
Userland/Libraries/LibM/math.cpp
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@ -742,4 +742,15 @@ long double nexttowardl(long double, long double) NOEXCEPT
{
TODO();
}
double copysign(double x, double y)
{
if (x < 0 && y < 0)
return x;
if (x >= 0 && y < 0)
return -x;
if (x < 0 && y >= 0)
return -x;
return x;
}
}

2
Userland/Libraries/LibM/math.h
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@ -143,4 +143,6 @@ double nexttoward(double, long double) NOEXCEPT;
float nexttowardf(float, long double) NOEXCEPT;
long double nexttowardl(long double, long double) NOEXCEPT;
double copysign(double x, double y);
__END_DECLS