diff mbox series

[RFC,PATCH-for-6.1,v2,3/6] target/mips/cp0_timer: Add ns_to_count() helper

Message ID 20210409093623.2402750-4-f4bug@amsat.org
State New
Headers show
Series target/mips/cp0_timer: Use new clock_ns_to_ticks() | expand

Commit Message

Philippe Mathieu-Daudé April 9, 2021, 9:36 a.m. UTC 
Factor ns_to_count() out to simplify a bit.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/cp0_timer.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Comments

Richard Henderson April 9, 2021, 4:15 p.m. UTC | #1 
On 4/9/21 2:36 AM, Philippe Mathieu-Daudé wrote:
> Factor ns_to_count() out to simplify a bit.
> 
> Signed-off-by: Philippe Mathieu-Daudé<f4bug@amsat.org>
> ---
>   target/mips/cp0_timer.c | 18 ++++++++++--------
>   1 file changed, 10 insertions(+), 8 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/mips/cp0_timer.c b/target/mips/cp0_timer.c
index 70de95d338f..73355b44b15 100644
--- a/target/mips/cp0_timer.c
+++ b/target/mips/cp0_timer.c
@@ -27,6 +27,11 @@ 
 #include "sysemu/kvm.h"
 #include "internal.h"
 
+static uint32_t ns_to_count(CPUMIPSState *env, uint64_t ns)
+{
+    return ns / env->cp0_count_ns;
+}
+
 /* MIPS R4K timer */
 static void cpu_mips_timer_update(CPUMIPSState *env)
 {
@@ -34,8 +39,7 @@  static void cpu_mips_timer_update(CPUMIPSState *env)
     uint32_t wait;
 
     now_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-    wait = env->CP0_Compare - env->CP0_Count -
-           (uint32_t)(now_ns / env->cp0_count_ns);
+    wait = env->CP0_Compare - env->CP0_Count - ns_to_count(env, now_ns);
     next_ns = now_ns + (uint64_t)wait * env->cp0_count_ns;
     timer_mod(env->timer, next_ns);
 }
@@ -64,7 +68,7 @@  uint32_t cpu_mips_get_count(CPUMIPSState *env)
             cpu_mips_timer_expire(env);
         }
 
-        return env->CP0_Count + (uint32_t)(now_ns / env->cp0_count_ns);
+        return env->CP0_Count + ns_to_count(env, now_ns);
     }
 }
 
@@ -79,9 +83,8 @@  void cpu_mips_store_count(CPUMIPSState *env, uint32_t count)
         env->CP0_Count = count;
     } else {
         /* Store new count register */
-        env->CP0_Count = count -
-               (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) /
-                          env->cp0_count_ns);
+        env->CP0_Count = count - ns_to_count(env,
+                                             qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
         /* Update timer timer */
         cpu_mips_timer_update(env);
     }
@@ -107,8 +110,7 @@  void cpu_mips_start_count(CPUMIPSState *env)
 void cpu_mips_stop_count(CPUMIPSState *env)
 {
     /* Store the current value */
-    env->CP0_Count += (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) /
-                                 env->cp0_count_ns);
+    env->CP0_Count += ns_to_count(env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
 }
 
 static void mips_timer_cb(void *opaque)