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* bignum.c (bigand_int): new function to calculate bignum and

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fixnum without allocating internal bignum.

* bignum.c (bigor_int): ditto.

* bignum.c (bigxor_int): ditto.

* bignum.c (bigand_int): even less object allocation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23596 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2009-05-27 16:16:57 +00:00
parent 72f4e2c709
commit 80ad1473cf
2 changed files with 146 additions and 21 deletions
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11
ChangeLog
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@ -2,6 +2,17 @@ Wed May 27 23:00:38 2009 Nobuyoshi Nakada <nobu@ruby-lang.org>
* parse.y (struct parser_params): lex_gets_ptr should be long.
Wed May 27 18:00:15 2009 Yukihiro Matsumoto <matz@ruby-lang.org>
* bignum.c (bigand_int): new function to calculate bignum and
fixnum without allocating internal bignum.
* bignum.c (bigor_int): ditto.
* bignum.c (bigxor_int): ditto.
* bignum.c (bigand_int): even less object allocation.
Wed May 27 14:08:39 2009 Yukihiro Matsumoto <matz@ruby-lang.org>
* st.c (st_insert2): new function with processing new key,

156
bignum.c
View file

@ -2530,7 +2530,7 @@ rb_big_pow(VALUE x, VALUE y)
return DBL2NUM(pow(rb_big2dbl(x), d));
}
static VALUE
static inline VALUE
bit_coerce(VALUE x)
{
while (!FIXNUM_P(x) && TYPE(x) != T_BIGNUM) {
@ -2542,6 +2542,50 @@ bit_coerce(VALUE x)
return x;
}
static VALUE
bigand_int(VALUE x, long y)
{
VALUE z;
BDIGIT *xds, *zds;
long xn, zn;
long i;
char sign;
if (y == 0) return INT2FIX(0);
sign = (y > 0);
xds = BDIGITS(x);
zn = xn = RBIGNUM_LEN(x);
#if SIZEOF_BDIGITS == SIZEOF_LONG
if (sign) {
y &= xds[0];
return LONG2NUM(y);
}
#endif
z = bignew(zn, RBIGNUM_SIGN(x) || sign);
zds = BDIGITS(z);
#if SIZEOF_BDIGITS == SIZEOF_LONG
i = 1;
zds[0] = xds[0] & y;
#else
{
BDIGIT_DBL num = y;
for (i=0; i<(int)(sizeof(y)/sizeof(BDIGIT)); i++) {
zds[i] = xds[i] & BIGLO(num);
num = BIGDN(num);
}
}
#endif
while (i < xn) {
zds[i] = sign?0:xds[i];
i++;
}
if (!RBIGNUM_SIGN(z)) get2comp(z);
return bignorm(z);
}
/*
* call-seq:
* big & numeric => integer
@ -2559,17 +2603,17 @@ rb_big_and(VALUE xx, VALUE yy)
x = xx;
y = bit_coerce(yy);
if (!RBIGNUM_SIGN(x)) {
x = rb_big_clone(x);
get2comp(x);
}
if (FIXNUM_P(y)) {
y = rb_int2big(FIX2LONG(y));
return bigand_int(x, FIX2LONG(y));
}
if (!RBIGNUM_SIGN(y)) {
y = rb_big_clone(y);
get2comp(y);
}
if (!RBIGNUM_SIGN(x)) {
x = rb_big_clone(x);
get2comp(x);
}
if (RBIGNUM_LEN(x) > RBIGNUM_LEN(y)) {
l1 = RBIGNUM_LEN(y);
l2 = RBIGNUM_LEN(x);
@ -2597,6 +2641,42 @@ rb_big_and(VALUE xx, VALUE yy)
return bignorm(z);
}
static VALUE
bigor_int(VALUE x, long y)
{
VALUE z;
BDIGIT *xds, *zds;
long xn, zn;
long i;
char sign;
sign = (y >= 0);
xds = BDIGITS(x);
zn = xn = RBIGNUM_LEN(x);
z = bignew(zn, RBIGNUM_SIGN(x) && sign);
zds = BDIGITS(z);
#if SIZEOF_BDIGITS == SIZEOF_LONG
i = 1;
zds[0] = xds[0] | y;
#else
{
BDIGIT_DBL num = y;
for (i=0; i<(int)(sizeof(y)/sizeof(BDIGIT)); i++) {
zds[i] = xds[i] | BIGLO(num);
num = BIGDN(num);
}
}
#endif
while (i < xn) {
zds[i] = sign?xds[i]:(BDIGIT)(BIGRAD-1);
i++;
}
if (!RBIGNUM_SIGN(z)) get2comp(z);
return bignorm(z);
}
/*
* call-seq:
* big | numeric => integer
@ -2614,18 +2694,18 @@ rb_big_or(VALUE xx, VALUE yy)
x = xx;
y = bit_coerce(yy);
if (FIXNUM_P(y)) {
y = rb_int2big(FIX2LONG(y));
}
if (!RBIGNUM_SIGN(y)) {
y = rb_big_clone(y);
get2comp(y);
}
if (!RBIGNUM_SIGN(x)) {
x = rb_big_clone(x);
get2comp(x);
}
if (FIXNUM_P(y)) {
return bigor_int(x, FIX2LONG(y));
}
if (!RBIGNUM_SIGN(y)) {
y = rb_big_clone(y);
get2comp(y);
}
if (RBIGNUM_LEN(x) > RBIGNUM_LEN(y)) {
l1 = RBIGNUM_LEN(y);
l2 = RBIGNUM_LEN(x);
@ -2650,10 +2730,44 @@ rb_big_or(VALUE xx, VALUE yy)
zds[i] = sign?ds2[i]:(BDIGIT)(BIGRAD-1);
}
if (!RBIGNUM_SIGN(z)) get2comp(z);
return bignorm(z);
}
static VALUE
bigxor_int(VALUE x, long y)
{
VALUE z;
BDIGIT *xds, *zds;
long xn, zn;
long i;
char sign;
sign = (y >= 0) ? 1 : 0;
xds = BDIGITS(x);
zn = xn = RBIGNUM_LEN(x);
z = bignew(zn, !(RBIGNUM_SIGN(x) ^ sign));
zds = BDIGITS(z);
#if SIZEOF_BDIGITS == SIZEOF_LONG
i = 1;
zds[0] = xds[0] ^ y;
#else
{
BDIGIT_DBL num = y;
for (i=0; i<(int)(sizeof(y)/sizeof(BDIGIT)); i++) {
zds[i] = xds[i] ^ BIGLO(num);
num = BIGDN(num);
}
}
#endif
while (i < xn) {
zds[i] = sign?xds[i]:~xds[i];
i++;
}
if (!RBIGNUM_SIGN(z)) get2comp(z);
return bignorm(z);
}
/*
* call-seq:
* big ^ numeric => integer
@ -2672,18 +2786,18 @@ rb_big_xor(VALUE xx, VALUE yy)
x = xx;
y = bit_coerce(yy);
if (FIXNUM_P(y)) {
y = rb_int2big(FIX2LONG(y));
}
if (!RBIGNUM_SIGN(y)) {
y = rb_big_clone(y);
get2comp(y);
}
if (!RBIGNUM_SIGN(x)) {
x = rb_big_clone(x);
get2comp(x);
}
if (FIXNUM_P(y)) {
return bigxor_int(x, FIX2LONG(y));
}
if (!RBIGNUM_SIGN(y)) {
y = rb_big_clone(y);
get2comp(y);
}
if (RBIGNUM_LEN(x) > RBIGNUM_LEN(y)) {
l1 = RBIGNUM_LEN(y);
l2 = RBIGNUM_LEN(x);