1.1.2. Half2 Arithmetic Functions
[Half Precision Intrinsics]
To use these functions include the header file cuda_fp16.h in your program.
Functions
 __device__ __half2 __h2div ( const __half2 a, const __half2 b )
 Performs half2 vector division in roundtonearesteven mode.
 __device__ __half2 __habs2 ( const __half2 a )
 Calculates the absolute value of both halves of the input half2 number and returns the result.
 __device__ __half2 __hadd2 ( const __half2 a, const __half2 b )
 Performs half2 vector addition in roundtonearesteven mode.
 __device__ __half2 __hadd2_sat ( const __half2 a, const __half2 b )
 Performs half2 vector addition in roundtonearesteven mode, with saturation to [0.0, 1.0].
 __device__ __half2 __hcmadd ( const __half2 a, const __half2 b, const __half2 c )
 Performs fast complex multiplyaccumulate.
 __device__ __half2 __hfma2 ( const __half2 a, const __half2 b, const __half2 c )
 Performs half2 vector fused multiplyadd in roundtonearesteven mode.
 __device__ __half2 __hfma2_relu ( const __half2 a, const __half2 b, const __half2 c )
 Performs half2 vector fused multiplyadd in roundtonearesteven mode with relu saturation.
 __device__ __half2 __hfma2_sat ( const __half2 a, const __half2 b, const __half2 c )
 Performs half2 vector fused multiplyadd in roundtonearesteven mode, with saturation to [0.0, 1.0].
 __device__ __half2 __hmul2 ( const __half2 a, const __half2 b )
 Performs half2 vector multiplication in roundtonearesteven mode.
 __device__ __half2 __hmul2_sat ( const __half2 a, const __half2 b )
 Performs half2 vector multiplication in roundtonearesteven mode, with saturation to [0.0, 1.0].
 __device__ __half2 __hneg2 ( const __half2 a )
 Negates both halves of the input half2 number and returns the result.
 __device__ __half2 __hsub2 ( const __half2 a, const __half2 b )
 Performs half2 vector subtraction in roundtonearesteven mode.
 __device__ __half2 __hsub2_sat ( const __half2 a, const __half2 b )
 Performs half2 vector subtraction in roundtonearesteven mode, with saturation to [0.0, 1.0].
Functions
 __device__ __half2 __h2div ( const __half2 a, const __half2 b )

Performs half2 vector division in roundtonearesteven mode.
Description
Divides half2 input vector a by input vector b in roundtonearest mode.
 __device__ __half2 __habs2 ( const __half2 a )

Calculates the absolute value of both halves of the input half2 number and returns the result.
Parameters
 a
  half2. Is only being read.
Returns
half2
 Returns
a with the absolute value of both halves.
Description
Calculates the absolute value of both halves of the input half2 number and returns the result.
 __device__ __half2 __hadd2 ( const __half2 a, const __half2 b )

Performs half2 vector addition in roundtonearesteven mode.
Description
Performs half2 vector add of inputs a and b, in roundtonearest mode.
 __device__ __half2 __hadd2_sat ( const __half2 a, const __half2 b )

Performs half2 vector addition in roundtonearesteven mode, with saturation to [0.0, 1.0].
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
Returns
half2
 The
sum of a and b, with respect to saturation.
Description
Performs half2 vector add of inputs a and b, in roundtonearest mode, and clamps the results to range [0.0, 1.0]. NaN results are flushed to +0.0.
 __device__ __half2 __hcmadd ( const __half2 a, const __half2 b, const __half2 c )

Performs fast complex multiplyaccumulate.
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
 c
  half2. Is only being read.
Returns
half2
 The
result of complex multiplyaccumulate operation on complex numbers a, b, and c
Description
Interprets vector half2 input pairs a, b, and c as complex numbers in half precision and performs complex multiplyaccumulate operation: a*b + c
 __device__ __half2 __hfma2 ( const __half2 a, const __half2 b, const __half2 c )

Performs half2 vector fused multiplyadd in roundtonearesteven mode.
Description
Performs half2 vector multiply on inputs a and b, then performs a half2 vector add of the result with c, rounding the result once in roundtonearesteven mode.
 __device__ __half2 __hfma2_relu ( const __half2 a, const __half2 b, const __half2 c )

Performs half2 vector fused multiplyadd in roundtonearesteven mode with relu saturation.
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
 c
  half2. Is only being read.
Returns
half2
 The
result of elementwise fused multiplyadd operation on vectors a, b, and c with relu saturation.
Description
Performs half2 vector multiply on inputs a and b, then performs a half2 vector add of the result with c, rounding the result once in roundtonearesteven mode. Then negative result is clamped to 0. NaN result is converted to canonical NaN.
 __device__ __half2 __hfma2_sat ( const __half2 a, const __half2 b, const __half2 c )

Performs half2 vector fused multiplyadd in roundtonearesteven mode, with saturation to [0.0, 1.0].
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
 c
  half2. Is only being read.
Returns
half2
 The
result of elementwise fused multiplyadd operation on vectors a, b, and c, with respect to saturation.
Description
Performs half2 vector multiply on inputs a and b, then performs a half2 vector add of the result with c, rounding the result once in roundtonearesteven mode, and clamps the results to range [0.0, 1.0]. NaN results are flushed to +0.0.
 __device__ __half2 __hmul2 ( const __half2 a, const __half2 b )

Performs half2 vector multiplication in roundtonearesteven mode.
Description
Performs half2 vector multiplication of inputs a and b, in roundtonearesteven mode.
 __device__ __half2 __hmul2_sat ( const __half2 a, const __half2 b )

Performs half2 vector multiplication in roundtonearesteven mode, with saturation to [0.0, 1.0].
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
Returns
half2
 The
result of elementwise multiplication of vectors a and b, with respect to saturation.
Description
Performs half2 vector multiplication of inputs a and b, in roundtonearesteven mode, and clamps the results to range [0.0, 1.0]. NaN results are flushed to +0.0.
 __device__ __half2 __hneg2 ( const __half2 a )

Negates both halves of the input half2 number and returns the result.
Description
Negates both halves of the input half2 number a and returns the result.
 __device__ __half2 __hsub2 ( const __half2 a, const __half2 b )

Performs half2 vector subtraction in roundtonearesteven mode.
Description
Subtracts half2 input vector b from input vector a in roundtonearesteven mode.
 __device__ __half2 __hsub2_sat ( const __half2 a, const __half2 b )

Performs half2 vector subtraction in roundtonearesteven mode, with saturation to [0.0, 1.0].
Parameters
 a
  half2. Is only being read.
 b
  half2. Is only being read.
Returns
half2
 The
subtraction of vector b from a, with respect to saturation.
Description
Subtracts half2 input vector b from input vector a in roundtonearesteven mode, and clamps the results to range [0.0, 1.0]. NaN results are flushed to +0.0.