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author | Falk Hueffner <falk@debian.org> | 2004-05-20 01:43:20 +0200 |
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committer | Falk Hueffner <falk@gcc.gnu.org> | 2004-05-20 01:43:20 +0200 |
commit | d3a7ef9aacb50cbcd85a34966da10304f048a576 (patch) | |
tree | d28c06eae10c078a6f4d7fc45d0fc1a6a827772f /gcc/libgcc2.c | |
parent | dc44e18a62f2bb07638dbd467c2df88c58424346 (diff) | |
download | gcc-d3a7ef9aacb50cbcd85a34966da10304f048a576.tar.gz |
re PR other/15526 (-ftrapv aborts on 0 * (-1))
PR other/15526
* libgcc2.c (__mulvsi3): Fix overflow test.
* gcc.dg/ftrapv-1.c: New test case.
From-SVN: r82042
Diffstat (limited to 'gcc/libgcc2.c')
-rw-r--r-- | gcc/libgcc2.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c index 34171ad9002..8a953ea8b76 100644 --- a/gcc/libgcc2.c +++ b/gcc/libgcc2.c @@ -130,9 +130,7 @@ __mulvsi3 (Wtype a, Wtype b) { const DWtype w = (DWtype) a * (DWtype) b; - if (((a >= 0) == (b >= 0)) - ? (UDWtype) w > (UDWtype) (((DWtype) 1 << (WORD_SIZE - 1)) - 1) - : (UDWtype) w < (UDWtype) ((DWtype) -1 << (WORD_SIZE - 1))) + if ((Wtype) (w >> WORD_SIZE) != (Wtype) w >> (WORD_SIZE - 1)) abort (); return w; |