diff options
Diffstat (limited to 'libFDK/include/fixpoint_math.h')
| -rw-r--r-- | libFDK/include/fixpoint_math.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libFDK/include/fixpoint_math.h b/libFDK/include/fixpoint_math.h index 93aea19..373eec1 100644 --- a/libFDK/include/fixpoint_math.h +++ b/libFDK/include/fixpoint_math.h @@ -171,6 +171,19 @@ extern const FIXP_DBL invSqrtTab[SQRT_VALUES]; * \return non-zero if (a_m*2^a_e) < (b_m*2^b_e), 0 otherwise */ FDK_INLINE INT fIsLessThan(FIXP_DBL a_m, INT a_e, FIXP_DBL b_m, INT b_e) { + INT n; + + n = fixnorm_D(a_m); + a_m <<= n; + a_e -= n; + + n = fixnorm_D(b_m); + b_m <<= n; + b_e -= n; + + if (a_m == (FIXP_DBL)0) a_e = b_e; + if (b_m == (FIXP_DBL)0) b_e = a_e; + if (a_e > b_e) { return ((b_m >> fMin(a_e - b_e, DFRACT_BITS - 1)) > a_m); } else { @@ -179,6 +192,19 @@ FDK_INLINE INT fIsLessThan(FIXP_DBL a_m, INT a_e, FIXP_DBL b_m, INT b_e) { } FDK_INLINE INT fIsLessThan(FIXP_SGL a_m, INT a_e, FIXP_SGL b_m, INT b_e) { + INT n; + + n = fixnorm_S(a_m); + a_m <<= n; + a_e -= n; + + n = fixnorm_S(b_m); + b_m <<= n; + b_e -= n; + + if (a_m == (FIXP_SGL)0) a_e = b_e; + if (b_m == (FIXP_SGL)0) b_e = a_e; + if (a_e > b_e) { return ((b_m >> fMin(a_e - b_e, FRACT_BITS - 1)) > a_m); } else { |