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random.tcc (mersenne_twister<>::operator()): Revert last change (per gcc-patches/2006-08/msg00484.html).

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2006-08-15  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1/random.tcc (mersenne_twister<>::operator()): Revert
	last change (per gcc-patches/2006-08/msg00484.html).

From-SVN: r116151
This commit is contained in:
Paolo Carlini 2006-08-15 09:08:31 +00:00 committed by Paolo Carlini
parent bbddd5d0c2
commit 64c23908ee
2 changed files with 10 additions and 4 deletions
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5
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,8 @@
2006-08-15 Paolo Carlini <pcarlini@suse.de>
* include/tr1/random.tcc (mersenne_twister<>::operator()): Revert
last change (per gcc-patches/2006-08/msg00484.html).
2006-08-14 Paolo Carlini <pcarlini@suse.de>
* include/tr1/random (class poisson_distribution<>): Add.

9
libstdc++-v3/include/tr1/random.tcc
View File

@ -285,13 +285,13 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
{
const _UIntType __upper_mask = (~_UIntType()) << __r;
const _UIntType __lower_mask = ~__upper_mask;
const _UIntType __fx[2] = { 0, __a };
for (int __k = 0; __k < (__n - __m); ++__k)
{
_UIntType __y = ((_M_x[__k] & __upper_mask)
| (_M_x[__k + 1] & __lower_mask));
_M_x[__k] = _M_x[__k + __m] ^ (__y >> 1) ^ __fx[__y & 0x01];
_M_x[__k] = (_M_x[__k + __m] ^ (__y >> 1)
^ ((__y & 0x01) ? __a : 0));
}
for (int __k = (__n - __m); __k < (__n - 1); ++__k)
@ -299,12 +299,13 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
_UIntType __y = ((_M_x[__k] & __upper_mask)
| (_M_x[__k + 1] & __lower_mask));
_M_x[__k] = (_M_x[__k + (__m - __n)] ^ (__y >> 1)
^ __fx[__y & 0x01]);
^ ((__y & 0x01) ? __a : 0));
}
_UIntType __y = ((_M_x[__n - 1] & __upper_mask)
| (_M_x[0] & __lower_mask));
_M_x[__n - 1] = _M_x[__m - 1] ^ (__y >> 1) ^ __fx[__y & 0x01];
_M_x[__n - 1] = (_M_x[__m - 1] ^ (__y >> 1)
^ ((__y & 0x01) ? __a : 0));
_M_p = 0;
}