neon_utils.hpp

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#ifndef OPENCV_HAL_NEON_UTILS_HPP




#define OPENCV_HAL_NEON_UTILS_HPP








#include "opencv2/core/cvdef.h"












#if CV_NEON








inline
int32x2_t cv_vrnd_s32_f32(float32x2_t v)


{



static
int32x2_t v_sign = vdup_n_s32(1 << 31),



v_05 = vreinterpret_s32_f32(vdup_n_f32(0.5f));







int32x2_t v_addition = vorr_s32(v_05, vand_s32(v_sign, vreinterpret_s32_f32(v)));



return
vcvt_s32_f32(vadd_f32(v, vreinterpret_f32_s32(v_addition)));


}







inline
int32x4_t cv_vrndq_s32_f32(float32x4_t v)


{



static
int32x4_t v_sign = vdupq_n_s32(1 << 31),



v_05 = vreinterpretq_s32_f32(vdupq_n_f32(0.5f));







int32x4_t v_addition = vorrq_s32(v_05, vandq_s32(v_sign, vreinterpretq_s32_f32(v)));



return
vcvtq_s32_f32(vaddq_f32(v, vreinterpretq_f32_s32(v_addition)));


}







inline
uint32x2_t cv_vrnd_u32_f32(float32x2_t v)


{



static
float32x2_t v_05 = vdup_n_f32(0.5f);



return
vcvt_u32_f32(vadd_f32(v, v_05));


}







inline
uint32x4_t cv_vrndq_u32_f32(float32x4_t v)


{



static
float32x4_t v_05 = vdupq_n_f32(0.5f);



return
vcvtq_u32_f32(vaddq_f32(v, v_05));


}







inline
float32x4_t cv_vrecpq_f32(float32x4_t val)


{



float32x4_t reciprocal = vrecpeq_f32(val);



reciprocal = vmulq_f32(vrecpsq_f32(val, reciprocal), reciprocal);



reciprocal = vmulq_f32(vrecpsq_f32(val, reciprocal), reciprocal);



return
reciprocal;


}







inline
float32x2_t cv_vrecp_f32(float32x2_t val)


{



float32x2_t reciprocal = vrecpe_f32(val);



reciprocal = vmul_f32(vrecps_f32(val, reciprocal), reciprocal);



reciprocal = vmul_f32(vrecps_f32(val, reciprocal), reciprocal);



return
reciprocal;


}







inline
float32x4_t cv_vrsqrtq_f32(float32x4_t val)


{



float32x4_t e = vrsqrteq_f32(val);



e = vmulq_f32(vrsqrtsq_f32(vmulq_f32(e, e), val), e);



e = vmulq_f32(vrsqrtsq_f32(vmulq_f32(e, e), val), e);



return
e;


}







inline
float32x2_t cv_vrsqrt_f32(float32x2_t val)


{



float32x2_t e = vrsqrte_f32(val);



e = vmul_f32(vrsqrts_f32(vmul_f32(e, e), val), e);



e = vmul_f32(vrsqrts_f32(vmul_f32(e, e), val), e);



return
e;


}







inline
float32x4_t cv_vsqrtq_f32(float32x4_t val)


{



return
cv_vrecpq_f32(cv_vrsqrtq_f32(val));


}







inline
float32x2_t cv_vsqrt_f32(float32x2_t val)


{



return
cv_vrecp_f32(cv_vrsqrt_f32(val));


}







#endif












#endif

// OPENCV_HAL_NEON_UTILS_HPP