Texas Instruments TMS320C64X - Manual (Page 98)

DSP_recip16
4-70
*(rexp++)=normal−15; /* store exponent */
b=0x80000000; /* dividend = 1 */
for(j=15;j>0;j−−)
b=_subc(b,a); /* divide */
b=b&0x7FFF; /* clear remainder
/* (clear upper half) */
if(neg) b=−b; /* if originally
/* negative, negate */
*(rfrac++)=b; /* store fraction */
}
}
Special Requirements None
Implementation Notes
- Bank Conflicts: No bank conflicts occur.
- Interruptibility: The code is interruptible.
- The conditional subtract instruction, SUBC, is used for division. SUBC is
used once for every bit of quotient needed (15).
Benchmarks Cycles 8 * nx + 14
Codesize 196 bytes