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Small optimization. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14863 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
This commit is contained in:
Giovanni Di Sirio 2021-10-03 07:38:48 +00:00
parent 82b03e885e
commit 8db7a89fe6
2 changed files with 1 additions and 43 deletions
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2
os/common/ports/ARMv7-M-ALT/chcore.c
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@ -65,7 +65,7 @@ uint64_t port_schedule_next(void) {
/* Note, not an error, we are outside the ISR already.*/
chSysLock();
if (chSchIsPreemptionRequired()) {
if (likely(chSchIsPreemptionRequired())) {
return ((uint64_t)(uint32_t)chThdGetSelfX() << 32) |
((uint64_t)(uint32_t)chSchSelectFirst() << 0);
}

42
os/common/ports/ARMv7-M-ALT/compilers/GCC/chcoreasm.S
View File

@ -280,48 +280,6 @@ PendSV_Handler:
bx lr
#if 0
push {lr}
bl port_schedule_next
cmp r0, #0
it eq
popeq {pc}
pop {lr}
/* Context store for old thread.*/
adds r1, #CONTEXT_OFFSET
PORT_STORE_INTEGER_CONTEXT
PORT_STORE_FLOAT_CONTEXT
PORT_STORE_MPU_CONTEXT
/* Context load for new thread.*/
adds r0, #CONTEXT_OFFSET
PORT_LOAD_INTEGER_CONTEXT
#if CH_DBG_SYSTEM_STATE_CHECK || CH_DBG_STATISTICS
cmp r3, #CORTEX_BASEPRI_DISABLED
bne 1f
push {r0, lr}
/* Returning to a preempted thread, performing a logical
"unlock" and handling statistics.*/
#if CH_DBG_SYSTEM_STATE_CHECK
bl __dbg_check_unlock
#endif
#if CH_DBG_STATISTICS
bl __stats_stop_measure_crit_thd
#endif
pop {r0, lr}
1:
#endif /* CH_DBG_SYSTEM_STATE_CHECK || CH_DBG_STATISTICS */
PORT_LOAD_FLOAT_CONTEXT
PORT_LOAD_MPU_CONTEXT
bx lr
#endif
/*--------------------------------------------------------------------------*
* Start a thread by invoking its work function.
*