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# std.math

Contains the elementary mathematical functions (powers, roots, and trigonometric functions), and low-level floating-point operations. Mathematical special functions are available in std.mathspecial.

Category | Members
--- | ---
Constants | E PI PI_2 PI_4 M_1_PI M_2_PI M_2_SQRTPI LN10 LN2 LOG2 LOG2E LOG2T LOG10E SQRT2 SQRT1_2
Algebraic | abs fabs sqrt cbrt hypot poly nextPow2 truncPow2
Trigonometry | sin cos tan asin acos atan atan2 sinh cosh tanh asinh acosh atanh
Rounding | ceil floor round lround trunc rint lrint nearbyint rndtol quantize
Exponentiation & Logarithms | pow powmod exp exp2 expm1 ldexp frexp log log2 log10 logb ilogb log1p scalbn
Remainder | fmod modf remainder remquo
Floating-point operations | approxEqual feqrel fdim fmax fmin fma isClose nextDown nextUp nextafter NaN getNaNPayload cmp
Introspection | isFinite isIdentical isInfinity isNaN isNormal isSubnormal signbit sgn copysign isPowerOf2
Hardware Control | IeeeFlags ieeeFlags resetIeeeFlags FloatingPointControl

The functionality closely follows the IEEE754-2008 standard for floating-point arithmetic, including the use of camelCase names rather than C99-style lower case names. All of these functions behave correctly when presented with an infinity or NaN.
The following IEEE 'real' formats are currently supported:

- 64 bit Big-endian 'double' (eg PowerPC)
- 128 bit Big-endian 'quadruple' (eg SPARC)
- 64 bit Little-endian 'double' (eg x86-SSE2)
- 80 bit Little-endian, with implied bit 'real80' (eg x87, Itanium)
- 128 bit Little-endian 'quadruple' (not implemented on any known processor!)
- Non-IEEE 128 bit Big-endian 'doubledouble' (eg PowerPC) has partial support

Unlike C, there is no global 'errno' variable. Consequently, almost all of these functions are pure nothrow.
License:
Boost License 1.0.
Authors:
Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger

Source std/math/package.d

Copyright © 1999-2021 by the D Language Foundation | Page generated by Ddoc on Tue Jul 20 05:58:47 2021