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bignum.c: micro optimization

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* bignum.c (rb_big_uminus, bigsub_int): use BIGNUM_NEGATE.

* internal.h (BIGNUM_NEGATE): simplify negation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-02-15 05:15:33 +00:00
parent 174be80027
commit 49079911ba
2 changed files with 4 additions and 3 deletions
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6
bignum.c
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@ -5526,7 +5526,7 @@ rb_big_uminus(VALUE x)
{
VALUE z = rb_big_clone(x);
BIGNUM_SET_SIGN(z, !BIGNUM_SIGN(x));
BIGNUM_NEGATE(z);
return bignorm(z);
}
@ -5624,7 +5624,7 @@ bigsub_int(VALUE x, long y0)
assert(xn == zn);
num = (BDIGIT_DBL_SIGNED)xds[0] - y;
if (xn == 1 && num < 0) {
BIGNUM_SET_SIGN(z, !BIGNUM_SIGN(x));
BIGNUM_NEGATE(z);
zds[0] = (BDIGIT)-num;
RB_GC_GUARD(x);
return bignorm(z);
@ -5687,7 +5687,7 @@ bigsub_int(VALUE x, long y0)
assert(num == 0 || num == -1);
if (num < 0) {
get2comp(z);
BIGNUM_SET_SIGN(z, !BIGNUM_SIGN(x));
BIGNUM_NEGATE(z);
}
RB_GC_GUARD(x);
return bignorm(z);

1
internal.h
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@ -364,6 +364,7 @@ struct RBignum {
: (RBASIC(b)->flags &= ~BIGNUM_SIGN_BIT))
#define BIGNUM_POSITIVE_P(b) BIGNUM_SIGN(b)
#define BIGNUM_NEGATIVE_P(b) (!BIGNUM_SIGN(b))
#define BIGNUM_NEGATE(b) (RBASIC(b)->flags ^= BIGNUM_SIGN_BIT)
#define BIGNUM_EMBED_FLAG FL_USER2
#define BIGNUM_EMBED_LEN_MASK (FL_USER5|FL_USER4|FL_USER3)