"TMS320C55x DSP Library DSPLIB Programmer's Reference"

DSPLIB FunctionsTable 4–2. Summary Table (Continued)(e) TrigonometricFunctionsushort sine (DATA *x, DATA *r, ushort nx)ushort atan2_16 (DATA *i, DATA *q, DATA *r, ushort nx)ushort atan16 (DATA *x, DATA *r, ushort nx)Descriptionsine of a vectorFour quadrant inverse tangent of a vectorArctan of a vector(f) MathFunctionsushort add (DATA *x, DATA *y, DATA *r, ushort nx,ushort scale)ushort expn (DATA *x, DATA *r, ushort nx)short bexp (DATA *x, ushort nx)ushort logn (DATA *x, LDATA *r, ushort nx)ushort log_2 (DATA *x, LDATA *r, ushort nx)ushort log_10 (DATA *x, LDATA *r, ushort nx)short maxidx (DATA *x, ushort ng, ushort ng_size)DescriptionOptimized vector additionExponent of a vectorExponent of all values in a vectorNatural log of a vectorLog base 2 of a vectorLog base 10 of a vectorIndex for maximum magnitude in a vectorshort maxidx34 (DATA *x, ushort nx) Index of the maximum element of a vector ≤ 34short maxval (DATA *x, ushort nx)void maxvec (DATA *x, ushort nx, DATA *r_val,DATA *r_idx)short minidx (DATA *x, ushort nx)short minval (DATA *x, ushort nx)void minvec (DATA *x, ushort nx, DATA *r_val,DATA *r_idx)ushort mul32 (LDATA *x, LDATA *y, LDATA *r, ushort nx)short neg (DATA *x, DATA *r, ushort nx)short neg32 (LDATA *x, LDATA *r, ushort nx)short power (DATA *x, LDATA *r, ushort nx)void recip16 (DATA *x, DATA *r, DATA *rexp, ushort nx)void ldiv16 (LDATA *x, DATA *y, DATA *r, DATA *rexp,ushort nx)Maximum magnitude in a vectorIndex and value of the maximum element of avectorIndex for minimum magnitude in a vectorMinimum element in a vectorIndex and value of the minimum element of avector32-bit vector multiply16-bit vector negate32-bit vector negatesum of squares of a vector (power)Vector reciprocal32-bit by 16-bit long divisionFunction Descriptions4-5