diff options
Diffstat (limited to 'ethosu/vela/test/test_fp_math.py')
| -rw-r--r-- | ethosu/vela/test/test_fp_math.py | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/ethosu/vela/test/test_fp_math.py b/ethosu/vela/test/test_fp_math.py index 2dde1e4b..8c1ed679 100644 --- a/ethosu/vela/test/test_fp_math.py +++ b/ethosu/vela/test/test_fp_math.py @@ -19,6 +19,7 @@ import numpy as np import pytest from ethosu.vela import fp_math +from ethosu.vela import scaling from ethosu.vela.softmax import SoftMax # Turn off black formatting for EXP_LUT to keep it compact @@ -116,3 +117,39 @@ def test_exp(): sm = SoftMax(None) for (expected, actual) in zip(EXP_LUT, sm.generate_exp_table(1.0, np.float32(0.05123165))): assert actual == expected + + +multiply_test_data = [ + (0, 0, 0), + (0, 0.7, 0), + (0, 55.8, 0), + (6, 0.3, 2), + (200, 0, 0), + (1, 1, 1), + (1, 0.1, 0), + (1, 3.49, 3), + (1, 3.51, 4), + (27, 1, 27), + (13, 0.9, 12), + (3, 21.2, 64), + (1000, 2000, 2000000), + (32767, 32767, 32767 * 32767), # extreme values +] + + +@pytest.mark.parametrize("x, factor, expected", multiply_test_data) +def test_multiply_by_quantized_multiplier(x, factor, expected): + scale, shift = scaling.quantise_scale(factor) + assert fp_math.multiply_by_quantized_multiplier(x, scale, shift) == expected + assert fp_math.multiply_by_quantized_multiplier(-x, scale, shift) == -expected + assert fp_math.multiply_by_quantized_multiplier(x, -scale, shift) == -expected + assert fp_math.multiply_by_quantized_multiplier(-x, -scale, shift) == expected + + +def test_multiply_by_quantized_multiplier_int16_limits(): + # Tests min/max limits of foreseen practical usage of multiply_by_quantized_multiplier + # for the purpose of calculating LUTs + for x in [-32768, 32767]: + for y in [-32768, 32767]: + scale, shift = scaling.quantise_scale(y) + assert fp_math.multiply_by_quantized_multiplier(x, scale, shift) == x * y |