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-rw-r--r--Optimizing-assembly-code.md52
1 files changed, 26 insertions, 26 deletions
diff --git a/Optimizing-assembly-code.md b/Optimizing-assembly-code.md
index 8d9f3ab..1f1a46b 100644
--- a/Optimizing-assembly-code.md
+++ b/Optimizing-assembly-code.md
@@ -1089,44 +1089,44 @@ Don't do:
```asm
; 8 bytes, 8 cycles
- ld a, e
+ ld a, l
adc 0
- ld e, a
- ld a, d
+ ld l, a
+ ld a, h
adc 0
- ld d, a
+ ld h, a
```
```asm
; 8 bytes, 8 cycles
- ld a, e
+ ld a, l
sbc 0
- ld e, a
- ld a, d
+ ld l, a
+ ld a, h
sbc 0
- ld d, a
+ ld h, a
```
And don't do:
```asm
; 7 bytes, 7 cycles
- ld a, e
+ ld a, l
adc 0
- ld e, a
- adc d
- sub e
- ld d, a
+ ld l, a
+ adc h
+ sub l
+ ld h, a
```
```asm
; 7 bytes, 7 cycles
- ld a, e
+ ld a, l
sbc 0
- ld e, a
- sbc d
- add e
- ld d, a
+ ld l, a
+ sbc h
+ add l
+ ld h, a
```
(That would be applying the "[Set `a` to some value plus or minus carry](#set-a-to-some-value-plus-or-minus-carry)" optimization to part of the first way.)
@@ -1135,21 +1135,21 @@ And don't do:
```asm
; 7 bytes, 7 or 8 cycles
- ld a, e
+ ld a, l
adc 0
- ld e, a
+ ld l, a
jr nc, .no_carry
- inc d
+ inc h
.no_carry
```
```asm
; 7 bytes, 7 or 8 cycles
- ld a, e
+ ld a, l
sbc 0
- ld e, a
+ ld l, a
jr nc, .no_carry
- dec d
+ dec h
.no_carry
```
@@ -1160,14 +1160,14 @@ But do:
```asm
; 3 bytes, 4 or 5 cycles
jr nc, .no_carry
- inc de
+ inc hl
.no_carry
```
```asm
; 3 bytes, 4 or 5 cycles
jr nc, .no_carry
- dec de
+ dec hl
.no_carry
```