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fix complex asin (issue #359)

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Alex Shinn 2016-06-07 23:42:48 +09:00
parent 16eae5341e
commit 9c14ee2dea
1 changed files with 9 additions and 16 deletions
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25
bignum.c
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@ -1019,26 +1019,19 @@ sexp sexp_complex_tan (sexp ctx, sexp z) {
} }
sexp sexp_complex_asin (sexp ctx, sexp z) { sexp sexp_complex_asin (sexp ctx, sexp z) {
sexp_gc_var2(res, tmp); sexp_gc_var3(res, tmp, tmp2);
sexp_gc_preserve2(ctx, res, tmp); sexp_gc_preserve3(ctx, res, tmp, tmp2);
res = sexp_complex_mul(ctx, z, z); res = sexp_complex_mul(ctx, z, z);
tmp = sexp_make_complex(ctx, SEXP_ONE, SEXP_ZERO); res = sexp_sub(ctx, SEXP_ONE, res);
res = sexp_sub(ctx, tmp, res);
res = sexp_sqrt(ctx, NULL, 1, res); res = sexp_sqrt(ctx, NULL, 1, res);
/* tmp = iz */ tmp = sexp_make_complex(ctx, SEXP_ZERO, SEXP_ZERO);
sexp_complex_real(tmp) = sexp_complex_imag(z); sexp_complex_real(tmp) = sexp_mul(ctx, SEXP_NEG_ONE, sexp_complex_imag(z));
sexp_negate(sexp_complex_real(tmp));
sexp_complex_imag(tmp) = sexp_complex_real(z); sexp_complex_imag(tmp) = sexp_complex_real(z);
res = sexp_add(ctx, tmp, res); res = sexp_add(ctx, tmp, res);
tmp = sexp_log(ctx, NULL, 1, res); res = sexp_log(ctx, NULL, 1, res);
/* res = -i*tmp */ tmp = sexp_make_complex(ctx, SEXP_ZERO, SEXP_NEG_ONE);
if (sexp_complexp(tmp)) { res = sexp_mul(ctx, res, tmp);
res = sexp_complex_copy(ctx, tmp); sexp_gc_release3(ctx);
sexp_negate(sexp_complex_imag(res));
} else {
res = tmp;
}
sexp_gc_release2(ctx);
return res; return res;
} }