| from cupy import _core | |
| from cupy._math import ufunc | |
| exp = ufunc.create_math_ufunc( | |
| 'exp', 1, 'cupy_exp', | |
| '''Elementwise exponential function. | |
| .. seealso:: :data:`numpy.exp` | |
| ''') | |
| expm1 = ufunc.create_math_ufunc( | |
| 'expm1', 1, 'cupy_expm1', | |
| '''Computes ``exp(x) - 1`` elementwise. | |
| .. seealso:: :data:`numpy.expm1` | |
| ''') | |
| exp2 = _core.create_ufunc( | |
| 'cupy_exp2', | |
| ('e->e', 'f->f', 'd->d', 'F->F', 'D->D'), | |
| 'out0 = pow(in0_type(2), in0)', | |
| doc='''Elementwise exponentiation with base 2. | |
| .. seealso:: :data:`numpy.exp2` | |
| ''') | |
| log = ufunc.create_math_ufunc( | |
| 'log', 1, 'cupy_log', | |
| '''Elementwise natural logarithm function. | |
| .. seealso:: :data:`numpy.log` | |
| ''') | |
| log10 = ufunc.create_math_ufunc( | |
| 'log10', 1, 'cupy_log10', | |
| '''Elementwise common logarithm function. | |
| .. seealso:: :data:`numpy.log10` | |
| ''') | |
| log2 = ufunc.create_math_ufunc( | |
| 'log2', 1, 'cupy_log2', | |
| '''Elementwise binary logarithm function. | |
| .. seealso:: :data:`numpy.log2` | |
| ''') | |
| log1p = ufunc.create_math_ufunc( | |
| 'log1p', 1, 'cupy_log1p', | |
| '''Computes ``log(1 + x)`` elementwise. | |
| .. seealso:: :data:`numpy.log1p` | |
| ''') | |
| logaddexp = _core.create_ufunc( | |
| 'cupy_logaddexp', | |
| ('ee->e', 'ff->f', 'dd->d'), | |
| ''' | |
| if (in0 == in1) { | |
| /* Handles infinities of the same sign */ | |
| out0 = in0 + log(2.0); | |
| } else { | |
| out0 = fmax(in0, in1) + log1p(exp(-fabs(in0 - in1))); | |
| } | |
| ''', | |
| doc='''Computes ``log(exp(x1) + exp(x2))`` elementwise. | |
| .. seealso:: :data:`numpy.logaddexp` | |
| ''') | |
| logaddexp2 = _core.create_ufunc( | |
| 'cupy_logaddexp2', | |
| ('ee->e', 'ff->f', 'dd->d'), | |
| ''' | |
| if (in0 == in1) { | |
| /* Handles infinities of the same sign */ | |
| out0 = in0 + 1.0; | |
| } else { | |
| out0 = fmax(in0, in1) + log2(1 + exp2(-fabs(in0 - in1))); | |
| } | |
| ''', | |
| doc='''Computes ``log2(exp2(x1) + exp2(x2))`` elementwise. | |
| .. seealso:: :data:`numpy.logaddexp2` | |
| ''') | |