diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2015-03-23 15:29:24 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-04-28 15:36:08 +0200 |
| commit | ad5f5fdca83cccd1a4c269b1fd8ba2fce8d1ba26 (patch) | |
| tree | 37ac44a4f5bfc7c341a0d4e25f97b5c88ac703d1 | |
| parent | 588ef9d411339012fc3c94bfad8911e9d0a517a2 (diff) | |
hw/arm/nseries: convert ffs(3) to ctz32()
It is not clear from the code how a 0 parameter should be handled by the
hardware. Keep the same behavior as ffs(0) - 1 == -1.
Cc: Andrzej Zaborowski <balrog@zabor.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1427124571-28598-3-git-send-email-stefanha@redhat.com
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | hw/arm/nseries.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/hw/arm/nseries.c b/hw/arm/nseries.c index 2a5406d98d..d243159664 100644 --- a/hw/arm/nseries.c +++ b/hw/arm/nseries.c @@ -579,7 +579,10 @@ static uint32_t mipid_txrx(void *opaque, uint32_t cmd, int len) case 0x26: /* GAMSET */ if (!s->pm) { - s->gamma = ffs(s->param[0] & 0xf) - 1; + s->gamma = ctz32(s->param[0] & 0xf); + if (s->gamma == 32) { + s->gamma = -1; /* XXX: should this be 0? */ + } } else if (s->pm < 0) { s->pm = 1; } |