2.8. Half2 Math Functions

To use these functions, include the header file cuda_fp16.h in your program.

Functions

__device__ __half2 h2ceil(const __half2 h): Calculate half2 vector ceiling of the input argument.
__device__ __half2 h2cos(const __half2 a): Calculates half2 vector cosine in round-to-nearest-even mode.
__device__ __half2 h2exp(const __half2 a): Calculates half2 vector exponential function in round-to-nearest-even mode.
__device__ __half2 h2exp10(const __half2 a): Calculates half2 vector decimal exponential function in round-to-nearest-even mode.
__device__ __half2 h2exp2(const __half2 a): Calculates half2 vector binary exponential function in round-to-nearest-even mode.
__device__ __half2 h2floor(const __half2 h): Calculate the largest integer less than or equal to h .
__device__ __half2 h2log(const __half2 a): Calculates half2 vector natural logarithm in round-to-nearest-even mode.
__device__ __half2 h2log10(const __half2 a): Calculates half2 vector decimal logarithm in round-to-nearest-even mode.
__device__ __half2 h2log2(const __half2 a): Calculates half2 vector binary logarithm in round-to-nearest-even mode.
__device__ __half2 h2rcp(const __half2 a): Calculates half2 vector reciprocal in round-to-nearest-even mode.
__device__ __half2 h2rint(const __half2 h): Round input to nearest integer value in half-precision floating-point number.
__device__ __half2 h2rsqrt(const __half2 a): Calculates half2 vector reciprocal square root in round-to-nearest-even mode.
__device__ __half2 h2sin(const __half2 a): Calculates half2 vector sine in round-to-nearest-even mode.
__device__ __half2 h2sqrt(const __half2 a): Calculates half2 vector square root in round-to-nearest-even mode.
__device__ __half2 h2trunc(const __half2 h): Truncate half2 vector input argument to the integral part.

2.8.1. Functions

__device__ __half2 h2ceil(const __half2 h)

Calculate half2 vector ceiling of the input argument.

For each component of vector h compute the smallest integer value not less than h.

See also

hceil(__half) for further details.

Parameters

h – [in] - half2. Is only being read.

Returns

half2

The vector of smallest integers not less than h.

__device__ __half2 h2cos(const __half2 a)

Calculates half2 vector cosine in round-to-nearest-even mode.

Calculates half2 cosine of input vector a in round-to-nearest-even mode.

See also

hcos(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise cosine on vector a.

__device__ __half2 h2exp(const __half2 a)

Calculates half2 vector exponential function in round-to-nearest-even mode.

Calculates half2 exponential function of input vector a in round-to-nearest-even mode.

See also

hexp(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise exponential function on vector a.

__device__ __half2 h2exp10(const __half2 a)

Calculates half2 vector decimal exponential function in round-to-nearest-even mode.

Calculates half2 decimal exponential function of input vector a in round-to-nearest-even mode.

See also

hexp10(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise decimal exponential function on vector a.

__device__ __half2 h2exp2(const __half2 a)

Calculates half2 vector binary exponential function in round-to-nearest-even mode.

Calculates half2 binary exponential function of input vector a in round-to-nearest-even mode.

See also

hexp2(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise binary exponential function on vector a.

__device__ __half2 h2floor(const __half2 h)

Calculate the largest integer less than or equal to h.

For each component of vector h calculate the largest integer value which is less than or equal to h.

See also

hfloor(__half) for further details.

Parameters

h – [in] - half2. Is only being read.

Returns

half2

The vector of largest integers which is less than or equal to h.

__device__ __half2 h2log(const __half2 a)

Calculates half2 vector natural logarithm in round-to-nearest-even mode.

Calculates half2 natural logarithm of input vector a in round-to-nearest-even mode.

See also

hlog(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise natural logarithm on vector a.

__device__ __half2 h2log10(const __half2 a)

Calculates half2 vector decimal logarithm in round-to-nearest-even mode.

Calculates half2 decimal logarithm of input vector a in round-to-nearest-even mode.

See also

hlog10(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise decimal logarithm on vector a.

__device__ __half2 h2log2(const __half2 a)

Calculates half2 vector binary logarithm in round-to-nearest-even mode.

Calculates half2 binary logarithm of input vector a in round-to-nearest-even mode.

See also

hlog2(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise binary logarithm on vector a.

__device__ __half2 h2rcp(const __half2 a)

Calculates half2 vector reciprocal in round-to-nearest-even mode.

Calculates half2 reciprocal of input vector a in round-to-nearest-even mode.

See also

hrcp(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise reciprocal on vector a.

__device__ __half2 h2rint(const __half2 h)

Round input to nearest integer value in half-precision floating-point number.

Round each component of half2 vector h to the nearest integer value in half-precision floating-point format, with halfway cases rounded to the nearest even integer value.

See also

hrint(__half) for further details.

Parameters

h – [in] - half2. Is only being read.

Returns

half2

The vector of rounded integer values.

__device__ __half2 h2rsqrt(const __half2 a)

Calculates half2 vector reciprocal square root in round-to-nearest-even mode.

Calculates half2 reciprocal square root of input vector a in round-to-nearest-even mode.

See also

hrsqrt(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise reciprocal square root on vector a.

__device__ __half2 h2sin(const __half2 a)

Calculates half2 vector sine in round-to-nearest-even mode.

Calculates half2 sine of input vector a in round-to-nearest-even mode.

See also

hsin(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise sine on vector a.

__device__ __half2 h2sqrt(const __half2 a)

Calculates half2 vector square root in round-to-nearest-even mode.

Calculates half2 square root of input vector a in round-to-nearest-even mode.

See also

hsqrt(__half) for further details.

Parameters

a – [in] - half2. Is only being read.

Returns

half2

The elementwise square root on vector a.

__device__ __half2 h2trunc(const __half2 h)

Truncate half2 vector input argument to the integral part.

Round each component of vector h to the largest integer value that does not exceed h in magnitude.

See also

htrunc(__half) for further details.

Parameters

h – [in] - half2. Is only being read.

Returns

half2

The truncated h.