#include <SkVx.h>

Public Member Functions
	ScaledDividerU32 (uint32_t divisor)

Vec< 4, uint32_t >	divide (const Vec< 4, uint32_t > &numerator) const

uint32_t	half () const

Detailed Description

Definition at line 879 of file SkVx.h.

Constructor & Destructor Documentation

◆ ScaledDividerU32()

skvx::ScaledDividerU32::ScaledDividerU32 ( uint32_t divisor )

inlineexplicit

Definition at line 881 of file SkVx.h.

            : fDivisorFactor{(uint32_t)(std::round((1.0 / divisor) * (1ull << 32)))}
            , fHalf{(divisor + 1) >> 1} {
        assert(divisor > 1);
    }

Member Function Documentation

◆ divide()

Vec< 4, uint32_t > skvx::ScaledDividerU32::divide ( const Vec< 4, uint32_t > & numerator ) const

inline

Definition at line 887 of file SkVx.h.

                                                                     {
#if SKVX_USE_SIMD && defined(SK_ARM_HAS_NEON)
        uint64x2_t hi = vmull_n_u32(vget_high_u32(to_vext(numerator)), fDivisorFactor);
        uint64x2_t lo = vmull_n_u32(vget_low_u32(to_vext(numerator)),  fDivisorFactor);
 
        return to_vec<4, uint32_t>(vcombine_u32(vshrn_n_u64(lo,32), vshrn_n_u64(hi,32)));
#else
        return cast<uint32_t>((cast<uint64_t>(numerator) * fDivisorFactor) >> 32);
#endif
    }

◆ half()

uint32_t skvx::ScaledDividerU32::half ( ) const

inline

Definition at line 898 of file SkVx.h.

898{ return fHalf; }

The documentation for this class was generated from the following file: