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| author | j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-10-25 23:36:08 +0000 |
|---|---|---|
| committer | j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-10-25 23:36:08 +0000 |
| commit | 88ad920b8adbce8b00085c51a61e57b5fbc83b0c (patch) | |
| tree | f91ba4ab84694dd9f3a3122e61f0db1b4b124e12 /target-ppc | |
| parent | e14fe0a921631ab6cf1f404ad6243a716cb84366 (diff) | |
| download | qemu-88ad920b8adbce8b00085c51a61e57b5fbc83b0c.zip | |
Fix PowerPC 64x64 bits multiplication overflow check.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3444 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/op_helper.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c index 13c1fbb00f..06a5a561ca 100644 --- a/target-ppc/op_helper.c +++ b/target-ppc/op_helper.c @@ -331,7 +331,8 @@ void do_mulldo (void) uint64_t tl; muls64(&tl, &th, T0, T1); - if (likely(th == 0)) { + /* If th != 0 && th != -1, then we had an overflow */ + if (likely((th + 1) <= 1)) { xer_ov = 0; } else { xer_ov = 1; |