ttl arctangent cordic table - ffptheta ffptheta idnt 1,1 ffp arctangent table *************************************** * (c) copyright 1981 by motorola inc. * *************************************** section 9 xdef ffptheta external definition ********************************************************* * arctangent table for cordic * * * * the following table is used during cordic * * transcendental evaluations for sine, cosine, and * * tangent and represents arctangent values 2**-n where * * n ranges from 0 to 24. the format is binary(31,29) * * precision (i.e. the binary point is between bits * * 28 and 27 giving two leading non-fraction bits.) * ********************************************************* ffptheta dc.l $c90fdaa2>>3 arctan(2**0) dc.l $76b19c15>>3 arctan(2**-1) dc.l $3eb6ebf2>>3 arctan(2**-2) dc.l $1fd5ba9a>>3 arctan(2**-3) dc.l $0ffaaddb>>3 arctan(2**-4) dc.l $07ff556e>>3 arctan(2**-5) dc.l $03ffeaab>>3 arctan(2**-6) dc.l $01fffd55>>3 arctan(2**-7) dc.l $00ffffaa>>3 arctan(2**-8) dc.l $007ffff5>>3 arctan(2**-9) dc.l $003ffffe>>3 arctan(2**-10) dc.l $001fffff>>3 arctan(2**-11) dc.l $000fffff>>3 arctan(2**-12) dc.l $0007ffff>>3 arctan(2**-13) dc.l $0003ffff>>3 arctan(2**-14) dc.l $0001ffff>>3 arctan(2**-15) dc.l $0000ffff>>3 arctan(2**-16) dc.l $00007fff>>3 arctan(2**-17) dc.l $00003fff>>3 arctan(2**-18) dc.l $00001fff>>3 arctan(2**-19) dc.l $00000fff>>3 arctan(2**-20) dc.l $000007ff>>3 arctan(2**-21) dc.l $000003ff>>3 arctan(2**-22) dc.l $000001ff>>3 arctan(2**-23) dc.l $000000ff>>3 arctan(2**-24) dc.l $0000007f>>3 arctan(2**-25) dc.l $0000003f>>3 arctan(2**-26) end