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mruby-bigint (mrb_bint_and): further optimization for bint & int

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Yukihiro "Matz" Matsumoto
2024-07-25 17:46:36 +09:00
parent 99c078bb6b
commit bf081c3d3d
1 changed files with 10 additions and 2 deletions
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mrbgems/mruby-bigint/core/bigint.c
+10 -2
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@@ -1663,17 +1663,25 @@ mrb_value
mrb_bint_and(mrb_state *mrb, mrb_value x, mrb_value y)
{
struct RBigint *b1 = RBIGINT(x);
struct RBigint *b3 = bint_new(mrb);
if (mrb_integer_p(y)) {
mrb_int z = mrb_integer(y);
if (z >= 0 && z < DIG_BASE) {
if (z == 0) return mrb_fixnum_value(0);
if (z > 0 && z < DIG_BASE) {
z &= b1->mp.p[0];
return mrb_int_value(mrb, z);
}
if (z == -1) return x;
if (z < 0 && -z < DIG_BASE) {
struct RBigint *b3 = bint_new(mrb);
mpz_set(mrb, &b3->mp, &b1->mp);
b3->mp.p[0] &= (mp_limb)z;
return bint_norm(mrb, b3);
}
}
y = mrb_as_bint(mrb, y);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
mpz_and(mrb, &b3->mp, &b1->mp, &b2->mp);
return bint_norm(mrb, b3);
}