core.math

pure nothrow @nogc @safe real cos(real x);

Returns cosine of x. x is in radians.

Special Values

x	cos(x)	invalid?
NAN	NAN	yes
±∞	NAN	yes

Bugs:

Results are undefined if |x| >= 2⁶⁴.

pure nothrow @nogc @safe real sin(real x);

Returns sine of x. x is in radians.

Special Values

x	sin(x)	invalid?
NAN	NAN	yes
±0.0	±0.0	no
±∞	NAN	yes

Bugs:

Results are undefined if |x| >= 2⁶⁴.

pure nothrow @nogc @safe long rndtol(real x);

Returns x rounded to a long value using the current rounding mode. If the integer value of x is greater than long.max, the result is indeterminate.

@nogc real rndtonl(real x);

Returns x rounded to a long value using the FE_TONEAREST rounding mode. If the integer value of x is greater than long.max, the result is indeterminate.

pure nothrow @nogc @safe float sqrt(float x);

Compute square root of x.

Special Values

x	sqrt(x)	invalid?
-0.0	-0.0	no
<0.0	NAN	yes
+∞	+∞	no

pure nothrow @nogc @safe double sqrt(double x);

ditto

Compute square root of x.

Special Values

x	sqrt(x)	invalid?
-0.0	-0.0	no
<0.0	NAN	yes
+∞	+∞	no

pure nothrow @nogc @safe real sqrt(real x);

ditto

Compute square root of x.

Special Values

x	sqrt(x)	invalid?
-0.0	-0.0	no
<0.0	NAN	yes
+∞	+∞	no

pure nothrow @nogc @safe real ldexp(real n, int exp);

Compute n * 2^exp

References: frexp

pure nothrow @nogc @safe real fabs(real x);

Returns |x|

Special Values

x	fabs(x)
±0.0	+0.0
±∞	+∞

pure nothrow @nogc @safe real rint(real x);

Rounds x to the nearest integer value, using the current rounding mode. If the return value is not equal to x, the FE_INEXACT exception is raised. nearbyint performs the same operation, but does not set the FE_INEXACT exception.

pure nothrow @nogc @safe real yl2x(real x, real y);

Building block functions, they translate to a single x87 instruction.