Why use it
Fixed-point inputs keep console behavior deterministic and avoid software floating-point work.
PSYQO SDK
psyqo::SoftMath::inverseSquareRoot
Function · 2 overloads
Function
Computes the inverse square root of a fixed point number, given an approximative hint.
Declaration 1 of 2
Declaration
FixedPoint<> inverseSquareRoot(FixedPoint<> x, FixedPoint<> y)Computes the inverse square root of a fixed point number, given an approximative hint.
| Parameter | Type | Meaning |
|---|---|---|
x | FixedPoint<> | The number to compute the inverse square root of. |
y | FixedPoint<> | The approximative hint of the result. |
Returns: FixedPoint<> — psyqo::FixedPoint<> The inverse square root.
Example
C++ example
#include "psyqo/soft-math.hh"
// Assume these named values have been initialized with valid data:
// FixedPoint<> x
// FixedPoint<> y
auto result = psyqo::SoftMath::inverseSquareRoot(x, y);Trade-offs and warnings
Stay within the documented range and account for quantization before chaining several operations.
Declared in https://github.com/pcsx-redux/nugget/blob/6186b131aacc5853a9161fb076ed34ffe504552d/psyqo/soft-math.hh:202
Declaration 2 of 2
staticDeclaration
static inline FixedPoint<> inverseSquareRoot(FixedPoint<> x)Computes the inverse square root of a fixed point number.
| Parameter | Type | Meaning |
|---|---|---|
x | FixedPoint<> | The number to compute the inverse square root of. |
Returns: FixedPoint<> — psyqo::FixedPoint<> The inverse square root.
Example
C++ example
#include "psyqo/soft-math.hh"
// Assume these named values have been initialized with valid data:
// FixedPoint<> x
auto result = psyqo::SoftMath::inverseSquareRoot(x);Why use it
Fixed-point inputs keep console behavior deterministic and avoid software floating-point work.
Trade-offs and warnings
Stay within the documented range and account for quantization before chaining several operations.
Declared in https://github.com/pcsx-redux/nugget/blob/6186b131aacc5853a9161fb076ed34ffe504552d/psyqo/soft-math.hh:210
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