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Optimise M0/M1 code size 

Replace two bool variables with one.

It's not obvious but (!hasP && !hasS) is equal to
!(hasP || hasS)

Note: expiration_time_set = hasP || hasS
Truth table:
|--------------------------------------------------|
| hasP| hasS| (!hasP && !hasS)|  !(hasP || hasS) |
|------|-----|--------------------|-----------------|
|   0    |  0   |               1            |            1           |
|   0    |  1   |               0            |            0           |
|   1    |  0   |               0            |            0           |
|   1    |  1   |               0            |            0           |
|--------------------------------------------------|

Change in memory:
Flash: -36 bytes
SRAM: 0 bytes
This commit is contained in:
Guðni Már Gilbert 2023-04-21 17:42:55 +00:00
parent 91b913e997
commit 4ce3fa53a1
1 changed files with 6 additions and 11 deletions
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17
Firmware/Marlin_main.cpp
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@ -5221,18 +5221,13 @@ void process_commands()
case 1: {
const char *src = strchr_pointer + 2;
codenum = 0;
bool hasP = false, hasS = false;
if (code_seen('P')) {
codenum = code_value_long(); // milliseconds to wait
hasP = codenum > 0;
}
if (code_seen('S')) {
codenum = code_value_long() * 1000; // seconds to wait
hasS = codenum > 0;
}
if (code_seen('P')) codenum = code_value_long(); // milliseconds to wait
if (code_seen('S')) codenum = code_value_long() * 1000; // seconds to wait
bool expiration_time_set = bool(codenum);
while (*src == ' ') ++src;
custom_message_type = CustomMsg::M0Wait;
if (!hasP && !hasS && *src != '\0') {
if (!expiration_time_set && *src != '\0') {
lcd_setstatus(src);
} else {
// farmers want to abuse a bug from the previous firmware releases
@ -5247,7 +5242,7 @@ void process_commands()
st_synchronize();
menu_set_block(MENU_BLOCK_STATUS_SCREEN_M0);
previous_millis_cmd.start();
if (codenum > 0 ) {
if (expiration_time_set) {
codenum += _millis(); // keep track of when we started waiting
KEEPALIVE_STATE(PAUSED_FOR_USER);
while(_millis() < codenum && !lcd_clicked()) {