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Reorder the asm instructions to make better sense

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This commit is contained in:
Gwilym Kuiper 2021-08-01 20:29:45 +01:00
parent 1af53aacb4
commit 80e03073fd
1 changed files with 2 additions and 4 deletions
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6
agb/src/sound/mixer/mixer.s
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@ -24,13 +24,11 @@ agb_rs__mixer_add:
mov r5, #0 @ current index we're reading from mov r5, #0 @ current index we're reading from
1: 1:
@ r6 = current buffer location, later gets set to the value we're reading and writing from
mov r6, r1 @ load the current sound buffer location
add r4, r0, r5, asr #8 @ calculate the address of the next read form the sound buffer add r4, r0, r5, asr #8 @ calculate the address of the next read form the sound buffer
add r5, r5, r2 @ calculate the position to read the next step from add r5, r5, r2 @ calculate the position to read the next step from
ldrh r9, [r6, r12]! @ load the current buffer value (r6 being the current location, r12 being the offset) mov r6, r1 @ r6 = current buffer location
ldrh r9, [r6, r12]! @ load the current buffer value (r12 being the offset)
@ but pre-increment r6 by r12 @ but pre-increment r6 by r12
ldrsb r10, [r4] @ load the current value we want to read ldrsb r10, [r4] @ load the current value we want to read