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dda_queue.c: take advantage of a special case. 

No functional change or stepping performance improvement, but a
14 bytes smaller binary:

  ATmega sizes               '168   '328(P)   '644(P)     '1280
  Program:  19426 bytes      136%       64%       31%       16%
     Data:   2177 bytes      213%      107%       54%       27%
   EEPROM:     32 bytes        4%        2%        2%        1%
This commit is contained in:
Markus Hitter 2016-11-27 19:32:08 +01:00
parent 329dd14446
commit c181a813e7
1 changed files with 1 additions and 1 deletions
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2
dda_queue.c
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@ -139,7 +139,7 @@ void enqueue_home(TARGET *t, uint8_t endstop_check, uint8_t endstop_stop_cond) {
version is inlined (and simplified) in queue_step(). version is inlined (and simplified) in queue_step().
*/ */
timer_reset(); timer_reset();
mb_tail = MB_NEXT(mb_tail); mb_tail = mb_head; // Valid ONLY if the queue was empty before!
dda_start(&movebuffer[mb_tail]); dda_start(&movebuffer[mb_tail]);
// Compensate for the cli() in timer_set(). // Compensate for the cli() in timer_set().
sei(); sei();