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Fix warning N2

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Fix warning N2

Signed-off-by: Bensuperpc <bensuperpc@gmail.com>
This commit is contained in:
Bensuperpc 2021-08-27 21:45:09 +02:00
parent 13a8698643
commit e8fd299668
1 changed files with 4 additions and 3 deletions
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7
math/inv_sqrt.cpp
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@ -27,16 +27,17 @@ inline T Fast_InvSqrt(T x) {
"T must be floating point type"); "T must be floating point type");
static_assert(iterations == 1 or iterations == 2, static_assert(iterations == 1 or iterations == 2,
"itarations must equal 1 or 2"); "itarations must equal 1 or 2");
typedef typename std::conditional<sizeof(T) == 8, std::int64_t, using Tint = typename std::conditional<sizeof(T) == 8, std::int64_t,
std::int32_t>::type Tint; std::int32_t>::type;
T y = x; T y = x;
T x2 = y * 0.5; T x2 = y * 0.5;
Tint i = *(Tint *)&y; Tint i = *(Tint *)&y;
i = (sizeof(T) == 8 ? 0x5fe6eb50c7b537a9 : 0x5f3759df) - (i >> 1); i = (sizeof(T) == 8 ? 0x5fe6eb50c7b537a9 : 0x5f3759df) - (i >> 1);
y = *(T *)&i; y = *(T *)&i;
y = y * (1.5 - (x2 * y * y)); y = y * (1.5 - (x2 * y * y));
if (iterations == 2) if (iterations == 2) {
y = y * (1.5 - (x2 * y * y)); y = y * (1.5 - (x2 * y * y));
}
return y; return y;
} }