Transcendental Instructions

Partial Tangent (fptan)

fptan

Example

Replace stack element 0 with its tangent and push a value of 1 onto the FPU stack.

fptan

Partial Arctangent (fpatan)

fpatan  

Example

Divide stack element 1 by stack element 0, compute the arctangent and return the result in radians to stack element 1, then pop the stack.

fpatan

2^x - 1 (f2xm1)

f2xm1

Example

Replace the contents of stack element 0 (st) with the value of (2^st-1).

f2xm1

Y * log2 X (fyl2x)

fyl2x

Example

Compute the logarithm (base-2) of stack element 0 and multiply the result by stack element 1 and return the result to stack element 1, then pop the stack.

fy12x

Y * log ₂ (X+1) (fyl2xp1)

fyl2xp1

Example

Compute the logarithm (base-2) of stack element 0 plus 1.0 and multiply the result by stack element 1 and return the result to stack element 1, then pop the stack.

fy12xpl