bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Nybbles & Bits

Browse Source
This commit is contained in:
Scott Lahteine
2021-02-04 19:37:59 -06:00
parent 604afd52d1
commit 49564e5310
5 changed files with 39 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
Marlin/src/module/planner.cpp
View File

@ -418,11 +418,11 @@ void Planner::init() {
L("2")
A("cpi %16,0x10") // (nr & 0xF00000) == 0 ?
A("brcc 3f") // No, skip this
A("swap %15") // Swap nibbles
A("swap %16") // Swap nibbles. Low nibble is 0
A("swap %15") // Swap nybbles
A("swap %16") // Swap nybbles. Low nybble is 0
A("mov %14, %15")
A("andi %14,0x0F") // Isolate low nibble
A("andi %15,0xF0") // Keep proper nibble in %15
A("andi %14,0x0F") // Isolate low nybble
A("andi %15,0xF0") // Keep proper nybble in %15
A("or %16, %14") // %16:%15 <<= 4
A("subi %3,-4") // idx += 4
@ -473,10 +473,10 @@ void Planner::init() {
L("9")
A("sbrs %3,2") // shift by 4bits position?
A("rjmp 16f") // No
A("swap %15") // Swap nibbles. lo nibble of %15 will always be 0
A("swap %14") // Swap nibbles
A("swap %15") // Swap nybbles. lo nybble of %15 will always be 0
A("swap %14") // Swap nybbles
A("mov %12,%14")
A("andi %12,0x0F") // isolate low nibble
A("andi %12,0x0F") // isolate low nybble
A("andi %14,0xF0") // and clear it
A("or %15,%12") // %15:%16 <<= 4
L("16")
@ -504,11 +504,11 @@ void Planner::init() {
L("11")
A("sbrs %3,2") // shift by 4 bit position ?
A("rjmp 12f") // No, skip it
A("swap %15") // Swap nibbles
A("andi %14, 0xF0") // Lose the lowest nibble
A("swap %14") // Swap nibbles. Upper nibble is 0
A("or %14,%15") // Pass nibble from upper byte
A("andi %15, 0x0F") // And get rid of that nibble
A("swap %15") // Swap nybbles
A("andi %14, 0xF0") // Lose the lowest nybble
A("swap %14") // Swap nybbles. Upper nybble is 0
A("or %14,%15") // Pass nybble from upper byte
A("andi %15, 0x0F") // And get rid of that nybble
L("12")
A("sbrs %3,3") // shift by 8 bit position ?
A("rjmp 6f") // No, skip it