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Implement the reciprocal ufunc #124

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Merged
merged 2 commits into from
Jul 31, 2025
Merged

Implement the reciprocal ufunc #124

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470c42a
Implement the reciprocal ufunc
juntyr Jul 31, 2025
bea5d1c
Restrict signbit check to unary ufuncs where NaN signs matter
juntyr Jul 31, 2025
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12 changes: 12 additions & 0 deletions quaddtype/numpy_quaddtype/src/ops.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,12 @@ quad_square(const Sleef_quad *op)
return Sleef_mulq1_u05(*op, *op);
}

static inline Sleef_quad
quad_reciprocal(const Sleef_quad *op)
{
return Sleef_divq1_u05(QUAD_ONE, *op);
}

static inline Sleef_quad
quad_log(const Sleef_quad *op)
{
Expand Down Expand Up @@ -211,6 +217,12 @@ ld_square(const long double *op)
return (*op) * (*op);
}

static inline long double
ld_reciprocal(const long double *op)
{
return 1.0L / (*op);
}

static inline long double
ld_log(const long double *op)
{
Expand Down
3 changes: 3 additions & 0 deletions quaddtype/numpy_quaddtype/src/umath/unary_ops.cpp
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Expand Up @@ -177,6 +177,9 @@ init_quad_unary_ops(PyObject *numpy)
if (create_quad_unary_ufunc<quad_square, ld_square>(numpy, "square") < 0) {
return -1;
}
if (create_quad_unary_ufunc<quad_reciprocal, ld_reciprocal>(numpy, "reciprocal") < 0) {
return -1;
}
if (create_quad_unary_ufunc<quad_log, ld_log>(numpy, "log") < 0) {
return -1;
}
Expand Down
24 changes: 12 additions & 12 deletions quaddtype/release_tracker.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
| add | ✅ | ✅ |
| subtract | ✅ | ✅ |
| multiply | ✅ | ✅ |
| matmul | ✅ | ✅ |
| matmul | ✅ | ✅ |
| divide | ✅ | ✅ |
| logaddexp | | |
| logaddexp2 | | |
Expand All @@ -24,7 +24,7 @@
| absolute | ✅ | ✅ |
| fabs | | |
| rint | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/±0.0/halfway cases)_ |
| sign | ✅ | ✅ |
| sign | ✅ | ✅ |
| heaviside | | |
| conj | | |
| conjugate | | |
Expand All @@ -35,10 +35,10 @@
| log10 | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/0/-values/1)_ |
| expm1 | | |
| log1p | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/-1/small values)_ |
| sqrt | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/0/-values)_ |
| square | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/0/large values)_ |
| sqrt | ✅ | ✅ |
| square | ✅ | ✅ |
| cbrt | | |
| reciprocal | | |
| reciprocal | ✅ | ✅ |
| gcd | | |
| lcm | | |
| sin | ✅ | ❌ _Need: basic tests + edge cases (NaN/inf/0/π multiples/2π range)_ |
Expand Down Expand Up @@ -77,14 +77,14 @@
| logical_not | | |
| maximum | ✅ | ✅ |
| minimum | ✅ | ✅ |
| fmax | ✅ | ✅ |
| fmin | ✅ | ✅ |
| isfinite | ✅ | ✅ |
| isinf | ✅ | ✅ |
| isnan | ✅ | ✅ |
| fmax | ✅ | ✅ |
| fmin | ✅ | ✅ |
| isfinite | ✅ | ✅ |
| isinf | ✅ | ✅ |
| isnan | ✅ | ✅ |
| isnat | | |
| signbit | ✅ | ✅ |
| copysign | ✅ | ✅ |
| signbit | ✅ | ✅ |
| copysign | ✅ | ✅ |
| nextafter | | |
| spacing | | |
| modf | | |
Expand Down
8 changes: 5 additions & 3 deletions quaddtype/tests/test_quaddtype.py
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Expand Up @@ -103,8 +103,8 @@ def test_array_aminmax(op, a, b):
np.testing.assert_array_equal(np.array(quad_res).astype(float), float_res)


@pytest.mark.parametrize("op", ["negative", "positive", "absolute", "sign", "signbit", "isfinite", "isinf", "isnan"])
@pytest.mark.parametrize("val", ["3.0", "-3.0", "12.5", "100.0", "0.0", "-0.0", "inf", "-inf", "nan", "-nan"])
@pytest.mark.parametrize("op", ["negative", "positive", "absolute", "sign", "signbit", "isfinite", "isinf", "isnan", "sqrt", "square", "reciprocal"])
@pytest.mark.parametrize("val", ["3.0", "-3.0", "12.5", "100.0", "1e100", "0.0", "-0.0", "inf", "-inf", "nan", "-nan"])
def test_unary_ops(op, val):
op_func = dict(negative=operator.neg, positive=operator.pos, absolute=operator.abs).get(op, None)
nop_func = getattr(np, op)
Expand All @@ -120,7 +120,9 @@ def test_unary_ops(op, val):
float_result = of(float_val)

np.testing.assert_array_equal(np.array(quad_result).astype(float), float_result)
assert np.signbit(float_result) == np.signbit(quad_result)

if op in ["negative", "positive", "absolute", "sign"]:
assert np.signbit(float_result) == np.signbit(quad_result)


def test_inf():
Expand Down
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