CUDA Math API :: CUDA Toolkit Documentation

1.5. Double Precision Intrinsics

This section describes double precision intrinsic functions that are only supported in device code.

Functions

__device__ double __ddiv_rd ( double x, double y ): Divide two floating point values in round-down mode.
__device__ double __ddiv_rn ( double x, double y ): Divide two floating point values in round-to-nearest-even mode.
__device__ double __ddiv_ru ( double x, double y ): Divide two floating point values in round-up mode.
__device__ double __ddiv_rz ( double x, double y ): Divide two floating point values in round-towards-zero mode.
__device__ double __drcp_rd ( double x ): Compute $\frac{1}{x}$ in round-down mode.
__device__ double __drcp_rn ( double x ): Compute $\frac{1}{x}$ in round-to-nearest-even mode.
__device__ double __drcp_ru ( double x ): Compute $\frac{1}{x}$ in round-up mode.
__device__ double __drcp_rz ( double x ): Compute $\frac{1}{x}$ in round-towards-zero mode.
__device__ double __dsqrt_rd ( double x ): Compute $\sqrt{x}$ in round-down mode.
__device__ double __dsqrt_rn ( double x ): Compute $\sqrt{x}$ in round-to-nearest-even mode.
__device__ double __dsqrt_ru ( double x ): Compute $\sqrt{x}$ in round-up mode.
__device__ double __dsqrt_rz ( double x ): Compute $\sqrt{x}$ in round-towards-zero mode.

Functions

__device__ double __ddiv_rd ( double x, double y )

Divide two floating point values in round-down mode.

Returns

Returns x / y.

Description

Divides two floating point values x by y in round-down (to negative infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __ddiv_rn ( double x, double y )

Divide two floating point values in round-to-nearest-even mode.

Returns

Returns x / y.

Description

Divides two floating point values x by y in round-to-nearest-even mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __ddiv_ru ( double x, double y )

Divide two floating point values in round-up mode.

Returns

Returns x / y.

Description

Divides two floating point values x by y in round-up (to positive infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __ddiv_rz ( double x, double y )

Divide two floating point values in round-towards-zero mode.

Returns

Returns x / y.

Description

Divides two floating point values x by y in round-towards-zero mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __drcp_rd ( double x )

Compute

\frac{1}{x}

in round-down mode.

Returns

Returns $\frac{1}{x}$ .

Description

Compute the reciprocal of x in round-down (to negative infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __drcp_rn ( double x )

Compute

\frac{1}{x}

in round-to-nearest-even mode.

Returns

Returns $\frac{1}{x}$ .

Description

Compute the reciprocal of x in round-to-nearest-even mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __drcp_ru ( double x )

Compute

\frac{1}{x}

in round-up mode.

Returns

Returns $\frac{1}{x}$ .

Description

Compute the reciprocal of x in round-up (to positive infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __drcp_rz ( double x )

Compute

\frac{1}{x}

in round-towards-zero mode.

Returns

Returns $\frac{1}{x}$ .

Description

Compute the reciprocal of x in round-towards-zero mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __dsqrt_rd ( double x )

Compute

\sqrt{x}

in round-down mode.

Returns

Returns $\sqrt{x}$ .

Description

Compute the square root of x in round-down (to negative infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __dsqrt_rn ( double x )

Compute

\sqrt{x}

in round-to-nearest-even mode.

Returns

Returns $\sqrt{x}$ .

Description

Compute the square root of x in round-to-nearest-even mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __dsqrt_ru ( double x )

Compute

\sqrt{x}

in round-up mode.

Returns

Returns $\sqrt{x}$ .

Description

Compute the square root of x in round-up (to positive infinity) mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.

__device__ double __dsqrt_rz ( double x )

Compute

\sqrt{x}

in round-towards-zero mode.

Returns

Returns $\sqrt{x}$ .

Description

Compute the square root of x in round-towards-zero mode.

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 7.
Requires compute capability >= 2.0.