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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-02-15 23:56:20 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-02-15 23:56:20 +0530 |
| commit | 2d0e0f29f85036d1189231cb7c1f19f27ba14a89 (patch) | |
| tree | f303c3a9cf28879a9dfa673018fdc9776a5db2eb | |
| parent | daaa7713e9170ec42536b5a0e46b434dd84753a5 (diff) | |
| download | glibc-2d0e0f29f85036d1189231cb7c1f19f27ba14a89.tar.gz glibc-2d0e0f29f85036d1189231cb7c1f19f27ba14a89.tar.xz glibc-2d0e0f29f85036d1189231cb7c1f19f27ba14a89.zip | |
Fix determination of lower precision in __mul
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/mpa.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index bb84e32b5f..012fce4f69 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2013-02-15 Siddhesh Poyarekar <siddhesh@redhat.com> + + * sysdeps/ieee754/dbl-64/mpa.c (__mul): Fix determination of + the lower precision input. + 2013-02-15 Joseph Myers <joseph@codesourcery.com> [BZ #13550] diff --git a/sysdeps/ieee754/dbl-64/mpa.c b/sysdeps/ieee754/dbl-64/mpa.c index 542d81bdcc..25f52f65c6 100644 --- a/sysdeps/ieee754/dbl-64/mpa.c +++ b/sysdeps/ieee754/dbl-64/mpa.c @@ -612,6 +612,7 @@ __mul (const mp_no *x, const mp_no *y, mp_no *z, int p) { int i, j, k, ip, ip2; double u, zk; + const mp_no *a; /* Is z=0? */ if (__glibc_unlikely (X[0] * Y[0] == ZERO)) @@ -626,9 +627,11 @@ __mul (const mp_no *x, const mp_no *y, mp_no *z, int p) if (X[ip2] != ZERO || Y[ip2] != ZERO) break; + a = X[ip2] != ZERO ? y : x; + /* ... and here, at least one of them is still zero. */ for (ip = ip2; ip > 0; ip--) - if (X[ip] * Y[ip] != ZERO) + if (a->d[ip] != ZERO) break; /* The product looks like this for p = 3 (as an example): |