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Diffstat (limited to 'ethosu/vela/fp_math.py')
| -rw-r--r-- | ethosu/vela/fp_math.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/ethosu/vela/fp_math.py b/ethosu/vela/fp_math.py index 2055879a..eaeb84a1 100644 --- a/ethosu/vela/fp_math.py +++ b/ethosu/vela/fp_math.py @@ -136,3 +136,13 @@ def exp_on_negative_values(a): return np.iinfo(np.int32).max else: return result + + +def multiply_by_quantized_multiplier(x, scale, shift): + # Multiplies x (int32) by (scale, shift) which have obtained by a call to scaling.quantize_scale, + # returns rounded result + shift = 31 - shift + left_shift = shift if shift > 0 else 0 + right_shift = -shift if shift < 0 else 0 + mul = saturating_rounding_mul(x * (1 << left_shift), scale) + return rounding_divide_by_pot(mul, right_shift) |