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[ruby/bigdecimal] Optimize the conversion from small Bignum

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https://github.com/ruby/bigdecimal/commit/4792a917d8
This commit is contained in:
Kenta Murata 2021-01-06 10:25:45 +09:00
parent 31854403b3
commit f289f8ae3a
1 changed files with 26 additions and 2 deletions
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28
ext/bigdecimal/bigdecimal.c
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@ -2763,8 +2763,32 @@ rb_int64_convert_to_BigDecimal(int64_t ival, size_t digs, int raise_exception)
static VALUE
rb_big_convert_to_BigDecimal(VALUE val, RB_UNUSED_VAR(size_t digs), int raise_exception)
{
Real *vp = GetVpValue(val, 1);
return check_exception(vp->obj);
assert(RB_TYPE_P(val, T_BIGNUM));
size_t size = rb_absint_size(val, NULL);
int sign = rb_big_cmp(val, INT2FIX(0));
if (size <= sizeof(long)) {
if (sign < 0) {
return rb_int64_convert_to_BigDecimal(NUM2LONG(val), digs, raise_exception);
}
else {
return rb_uint64_convert_to_BigDecimal(NUM2ULONG(val), digs, raise_exception);
}
}
#if defined(SIZEOF_LONG_LONG) && SIZEOF_LONG < SIZEOF_LONG_LONG
else if (size <= sizeof(LONG_LONG)) {
if (sign < 0) {
return rb_int64_convert_to_BigDecimal(NUM2LL(val), digs, raise_exception);
}
else {
return rb_uint64_convert_to_BigDecimal(NUM2ULL(val), digs, raise_exception);
}
}
#endif
else {
Real *vp = GetVpValue(val, 1);
return check_exception(vp->obj);
}
}
static VALUE