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[Qemu-devel] [PATCH v2 6/7] bt: remove muldiv64()
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH v2 6/7] bt: remove muldiv64() |
Date: |
Wed, 26 Aug 2015 20:05:37 +0200 |
Originally, timers were ticks based, and it made sense to
add ticks to current time to know when to trigger an alarm.
But since commit:
7447545 change all other clock references to use nanosecond resolution accessors
All timers use nanoseconds and we need to convert ticks to nanoseconds.
As get_ticks_per_sec() is 10^9,
a = muldiv64(b, get_ticks_per_sec(), 100);
y = muldiv64(x, get_ticks_per_sec(), 1000000);
can be converted to
a = b * 10000000;
y = x * 1000;
Signed-off-by: Laurent Vivier <address@hidden>
---
hw/bt/hci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/bt/hci.c b/hw/bt/hci.c
index 7ea3dc6..585ee2e 100644
--- a/hw/bt/hci.c
+++ b/hw/bt/hci.c
@@ -595,7 +595,7 @@ static void bt_hci_inquiry_result(struct bt_hci_s *hci,
static void bt_hci_mod_timer_1280ms(QEMUTimer *timer, int period)
{
timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
- muldiv64(period << 7, get_ticks_per_sec(), 100));
+ (uint64_t)(period << 7) * 10000000);
}
static void bt_hci_inquiry_start(struct bt_hci_s *hci, int length)
@@ -1099,7 +1099,7 @@ static int bt_hci_mode_change(struct bt_hci_s *hci,
uint16_t handle,
bt_hci_event_status(hci, HCI_SUCCESS);
timer_mod(link->acl_mode_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
- muldiv64(interval * 625, get_ticks_per_sec(), 1000000));
+ ((uint64_t)interval * 625) * 1000);
bt_hci_lmp_mode_change_master(hci, link->link, mode, interval);
return 0;
--
2.1.0
- [Qemu-devel] [PATCH v2 0/7] remove useless muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 1/7] PCI: remove muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 3/7] openrisc: remove muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 2/7] mips: remove muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 5/7] hpet: remove muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 4/7] arm: clarify the use of muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 7/7] net: remove muldiv64(), Laurent Vivier, 2015/08/26
- [Qemu-devel] [PATCH v2 6/7] bt: remove muldiv64(),
Laurent Vivier <=