[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 5/7] omap_intc: convert ffs(3) to ctz32() in omap_in
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH 5/7] omap_intc: convert ffs(3) to ctz32() in omap_inth_sir_update() |
Date: |
Tue, 17 Mar 2015 11:56:48 +0000 |
The loop previously terminated on ffs(0) == 0, now it terminates on
ctz32(0) + 1 == 33.
Other than this change, ffs() is simply replaced with ctz32() + 1.
Cc: Peter Maydell <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
hw/intc/omap_intc.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/hw/intc/omap_intc.c b/hw/intc/omap_intc.c
index ad3931c..0cf2d2d 100644
--- a/hw/intc/omap_intc.c
+++ b/hw/intc/omap_intc.c
@@ -72,14 +72,15 @@ static void omap_inth_sir_update(struct omap_intr_handler_s
*s, int is_fiq)
for (j = 0; j < s->nbanks; ++j) {
level = s->bank[j].irqs & ~s->bank[j].mask &
(is_fiq ? s->bank[j].fiq : ~s->bank[j].fiq);
- for (f = ffs(level), i = f - 1, level >>= f - 1; f; i += f,
- level >>= f) {
+ for (f = ctz32(level) + 1, i = f - 1, level >>= f - 1;
+ f != 33;
+ i += f, level >>= f) {
p = s->bank[j].priority[i];
if (p <= p_intr) {
p_intr = p;
sir_intr = 32 * j + i;
}
- f = ffs(level >> 1);
+ f = ctz32(level >> 1) + 1;
}
}
s->sir_intr[is_fiq] = sir_intr;
--
2.1.0
- [Qemu-devel] [PATCH 0/7] Convert ffs(3) to ctz32(), Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 1/7] bt-sdp: fix broken uuids power-of-2 calculation, Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 6/7] os-win32: drop ffs(3) prototype, Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 4/7] sd: convert sd_normal_command() ffs(3) call to ctz32(), Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 3/7] Convert ffs() != 0 callers to ctz32(), Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 7/7] checkpatch: complain about ffs(3) calls, Stefan Hajnoczi, 2015/03/17
- [Qemu-devel] [PATCH 5/7] omap_intc: convert ffs(3) to ctz32() in omap_inth_sir_update(),
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH 2/7] Convert (ffs(val) - 1) to ctz32(val), Stefan Hajnoczi, 2015/03/17
- Re: [Qemu-devel] [PATCH 0/7] Convert ffs(3) to ctz32(), Stefan Hajnoczi, 2015/03/17