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mruby-bigint (mrb_bint_xor): add fast path with fixnums

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Yukihiro "Matz" Matsumoto
2024-07-29 15:48:42 +09:00
parent b706c89c41
commit ab95e042ca
1 changed files with 10 additions and 1 deletions
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mrbgems/mruby-bigint/core/bigint.c
+10 -1
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@@ -1615,11 +1615,20 @@ mrb_bint_neg(mrb_state *mrb, mrb_value x)
mrb_value
mrb_bint_xor(mrb_state *mrb, mrb_value x, mrb_value y)
{
struct RBigint *b3 = bint_new(mrb);
struct RBigint *b1 = RBIGINT(x);
if (mrb_integer_p(y)) {
mrb_int z = mrb_integer(y);
if (z == 0) return x;
// if (z == -1) return ;
if (0 < z && (mp_dbl_limb)z < DIG_BASE) {
z ^= b1->mp.p[0];
return mrb_int_value(mrb, z);
}
}
y = mrb_as_bint(mrb, y);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
mpz_xor(mrb, &b3->mp, &b1->mp, &b2->mp);
return bint_norm(mrb, b3);
}