Declaration - Freescale Semiconductor DSP56800E User Manual

2.38.2 Declaration

The available MLIB_Rcp
acc32_t MLIB_Rcp_A32s(frac16_t
acc32_t MLIB_Rcp1_A32s(frac16_t
2.38.3 Function use
The use of the MLIB_Rcp
#include "mlib.h"
static acc32_t a32Result;
static frac16_t f16Denom;
void main(void)
{
f16Denom = FRAC16(0.354);
/* a32Result = 1/f16Denom */
a32Result = MLIB_Rcp1_A32s(f16Denom);
}
2.39 MLIB_Rcp1Q
The MLIB_Rcp1Q functions return the single quadrant reciprocal value for the input
value. The input value must be a nonnegative number, otherwise the function returns
undefined results. The function does not saturate the output. See the following equation:
2.39.1 Available versions
This function is available in the following versions:
• Accumulator output with fractional input - the output is the accumulator type, where
the result is greater than or equal to 1. The function is not defined for negative inputs.
The input is the fractional type.
Freescale Semiconductor, Inc.
functions have the following declarations:
f16Denom)
f16Denom)
function is shown in the following example:
/* f16Denom = 0.354 */
Equation 37. Algorithm formula
MLIB User's Guide, Rev. 2, 10/2015
Chapter 2 Algorithms in detail
77