cofactorQ32()

bool fl::anonymous_namespace{device_solve.cpp.hpp}::cofactorQ32	(	i32	e,
		i32	i_,
		i32	f,
		i32	h,
		i64 *	out )

e * i - f * h, or false if any part of it leaves i64.

Definition at line 67 of file device_solve.cpp.hpp.

                                                                     {
    const i64 left = static_cast<i64>(e) * static_cast<i64>(i_);
    const i64 right = static_cast<i64>(f) * static_cast<i64>(h);
    // Two i32 products always fit; their difference need not.
    if (!sumFitsI64(left, -right)) {
        return false;
    }
    *out = left - right;
    return true;
}

References cofactorQ32(), fl::FL_NO_EXCEPT, and sumFitsI64().

Referenced by cofactorQ32().

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