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authorStefan Hajnoczi <stefanha@redhat.com>2015-03-23 15:29:26 +0000
committerKevin Wolf <kwolf@redhat.com>2015-04-28 15:36:08 +0200
commit786a4ea82ec9c87e3a895cf41081029b285a5fe5 (patch)
treefe42f1059c13ea9a27bc9515e5d440d3bb354773 /hw/pci/slotid_cap.c
parent5863d374a32c98a7adb4c5e49d62de3cdc16d2ea (diff)
Convert (ffs(val) - 1) to ctz32(val)
This commit was generated mechanically by coccinelle from the following semantic patch: @@ expression val; @@ - (ffs(val) - 1) + ctz32(val) The call sites have been audited to ensure the ffs(0) - 1 == -1 case never occurs (due to input validation, asserts, etc). Therefore we don't need to worry about the fact that ctz32(0) == 32. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1427124571-28598-5-git-send-email-stefanha@redhat.com Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/pci/slotid_cap.c')
-rw-r--r--hw/pci/slotid_cap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/pci/slotid_cap.c b/hw/pci/slotid_cap.c
index 62f7bae2f1..1c01d346c9 100644
--- a/hw/pci/slotid_cap.c
+++ b/hw/pci/slotid_cap.c
@@ -3,7 +3,7 @@
#include "qemu/error-report.h"
#define SLOTID_CAP_LENGTH 4
-#define SLOTID_NSLOTS_SHIFT (ffs(PCI_SID_ESR_NSLOTS) - 1)
+#define SLOTID_NSLOTS_SHIFT ctz32(PCI_SID_ESR_NSLOTS)
int slotid_cap_init(PCIDevice *d, int nslots,
uint8_t chassis,