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asin micro-optimization suggested in email.

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Tim Peters 2001-02-22 19:51:56 +00:00
parent 15d72703fc
commit 1c8e1f0654
1 changed files with 3 additions and 2 deletions
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5
Modules/cmathmodule.c
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@ -70,8 +70,9 @@ c_asin(Py_complex x)
/* -i * log[(sqrt(1-x**2) + i*x] */ /* -i * log[(sqrt(1-x**2) + i*x] */
const Py_complex squared = c_prod(x, x); const Py_complex squared = c_prod(x, x);
const Py_complex sqrt_1_minus_x_sq = c_sqrt(c_diff(c_one, squared)); const Py_complex sqrt_1_minus_x_sq = c_sqrt(c_diff(c_one, squared));
const Py_complex sum = c_sum(sqrt_1_minus_x_sq, c_prod(c_i, x)); return c_neg(c_prodi(c_log(
return c_neg(c_prodi(c_log(sum))); c_sum(sqrt_1_minus_x_sq, c_prodi(x))
) ) );
} }
static char c_asin_doc[] = static char c_asin_doc[] =