Floating-Point Intrinsics

Intel® C++ Compiler Classic Developer Guide and Reference

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Date 3/31/2023

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Floating-Point Intrinsics

The following table lists and describes floating point intrinsics that you can use across all Intel® and compatible architectures. Floating-point intrinsic functions may invoke library functions that are more highly optimized for Intel® microprocessors than for non-Intel microprocessors.

Intrinsic	Description
`double fabs(double)`	Returns the absolute value of a floating-point value.
`double log(double)`	Returns the natural logarithm ln(x), x>0, with double precision.
`float logf(float)`	Returns the natural logarithm ln(x), x>0, with single precision.
`double log10(double)`	Returns the base 10 logarithm log10(x), x>0, with double precision.
`float log10f(float)`	Returns the base 10 logarithm log10(x), x>0, with single precision.
`double exp(double)`	Returns the exponential function with double precision.
`float expf(float)`	Returns the exponential function with single precision.
`double pow(double, double)`	Returns the value of `x` to the power `y` with double precision.
`float powf(float, float)`	Returns the value of `x` to the power `y` with single precision.
`double sin(double)`	Returns the sine of `x` with double precision.
`float sinf(float)`	Returns the sine of `x` with single precision.
`double cos(double)`	Returns the cosine of `x` with double precision.
`float cosf(float)`	Returns the cosine of `x` with single precision.
`double tan(double)`	Returns the tangent of `x` with double precision.
`float tanf(float)`	Returns the tangent of `x` with single precision.
`double acos(double)`	Returns the inverse cosine of `x` with double precision.
`float acosf(float)`	Returns the inverse cosine of `x` with single precision.
`double acosh(double)`	Compute the inverse hyperbolic cosine of the argument with double precision.
`float acoshf(float)`	Compute the inverse hyperbolic cosine of the argument with single precision.
`double asin(double)`	Compute inverse sine of the argument with double precision.
`float asinf(float)`	Compute inverse sine of the argument with single precision.
`double asinh(double)`	Compute inverse hyperbolic sine of the argument with double precision.
`float asinhf(float)`	Compute inverse hyperbolic sine of the argument with single precision.
`double atan(double)`	Compute inverse tangent of the argument with double precision.
`float atanf(float)`	Compute inverse tangent of the argument with single precision.
`double atanh(double)`	Compute inverse hyperbolic tangent of the argument with double precision.
`float atanhf(float)`	Compute inverse hyperbolic tangent of the argument with single precision.
`double cabs(double complex z)`	Computes absolute value of complex number. The intrinsic argument is a complex number made up of two double precision elements, one real and one imaginary. The input parameter `z` is made up of two values of double type passed together as a single argument.
`float cabsf(float complex z)`	Computes absolute value of complex number. The intrinsic argument is a complex number made up of two single precision elements, one real and one imaginary. The input parameter `z` is made up of two values of float type passed together as a single argument.
`double ceil(double)`	Computes smallest integral value of double precision argument not less than the argument.
`float ceilf(float)`	Computes smallest integral value of single precision argument not less than the argument.
`double cosh(double)`	Computes the hyperbolic cosine of double precision argument.
`float coshf(float)`	Computes the hyperbolic cosine of single precision argument.
`float fabsf(float)`	Computes absolute value of single precision argument.
`double floor(double)`	Computes the largest integral value of the double precision argument not greater than the argument.
`float floorf(float)`	Computes the largest integral value of the single precision argument not greater than the argument.
`double fmod(double)`	Computes the floating-point remainder of the division of the first argument by the second argument with double precision.
`float fmodf(float)`	Computes the floating-point remainder of the division of the first argument by the second argument with single precision.
`double hypot(double, double)`	Computes the length of the hypotenuse of a right angled triangle with double precision.
`float hypotf(float, float)`	Computes the length of the hypotenuse of a right angled triangle with single precision.
`double rint(double)`	Computes the integral value represented as double using the IEEE rounding mode.
`float rintf(float)`	Computes the integral value represented with single precision using the IEEE rounding mode.
`double sinh(double)`	Computes the hyperbolic sine of the double precision argument.
`float sinhf(float)`	Computes the hyperbolic sine of the single precision argument.
`float sqrtf(float)`	Computes the square root of the single precision argument.
`double tanh(double)`	Computes the hyperbolic tangent of the double precision argument.
`float tanhf(float)`	Computes the hyperbolic tangent of the single precision argument.

Parent topic: Intrinsics for All Intel® Architectures

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Floating-Point Intrinsics