4G/code/BCU/BCUModel/look1_iu8lu16n16tu16_binlcase.c

#include "look1_iu8lu16n16tu16_binlcase.h"
#include "rtwtypes.h"

uint16_T look1_iu8lu16n16tu16_binlcase(uint8_T u0, const uint8_T bp0[], const
  uint16_T table[], uint32_T maxIndex)
{
  uint32_T iLeft;
  uint16_T frac;
  uint16_T y;
  if (u0 <= bp0[0U]) {
    iLeft = 0U;
    frac = 0U;
  } else if (u0 < bp0[maxIndex]) {
    uint32_T bpIdx;
    uint32_T iRght;
    bpIdx = maxIndex >> 1U;
    iLeft = 0U;
    iRght = maxIndex;
    while (iRght - iLeft > 1U) {
      if (u0 < bp0[bpIdx]) {
        iRght = bpIdx;
      } else {
        iLeft = bpIdx;
      }

      bpIdx = (iRght + iLeft) >> 1U;
    }

    uint8_T bpLeftVar;
    bpLeftVar = bp0[iLeft];
    frac = (uint16_T)(((uint32_T)(uint8_T)((uint32_T)u0 - bpLeftVar) << 16) /
                      (uint8_T)((uint32_T)bp0[iLeft + 1U] - bpLeftVar));
  } else {
    iLeft = maxIndex;
    frac = 0U;
  }

  if (iLeft == maxIndex) {
    y = table[iLeft];
  } else {
    uint16_T yL_0d0;
    uint16_T yR_0d0;
    yR_0d0 = table[iLeft + 1U];
    yL_0d0 = table[iLeft];
    if (yR_0d0 >= yL_0d0) {
      y = (uint16_T)((uint32_T)(uint16_T)(((uint32_T)(uint16_T)((uint32_T)yR_0d0
        - yL_0d0) * frac) >> 16) + yL_0d0);
    } else {
      y = (uint16_T)((uint32_T)yL_0d0 - (uint16_T)(((uint32_T)(uint16_T)
        ((uint32_T)yL_0d0 - yR_0d0) * frac) >> 16));
    }
  }

  return y;
}