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Handle non multiple of 4 buffer sizes for mono

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This commit is contained in:
Gwilym Inzani 2023-07-14 23:46:42 +01:00
parent eb8cb667c1
commit a61069fb60
1 changed files with 26 additions and 0 deletions
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26
agb/src/sound/mixer/mixer.s
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@ -43,6 +43,18 @@ agb_arm_func \fn_name
str r4, [r1], #4 @ store the new value, and increment the pointer str r4, [r1], #4 @ store the new value, and increment the pointer
.endm .endm
@ handle the non-multiple of 4 buffer size case
and r3, r8, #3
1:
subs r3, r3, #1
bmi 1f
add_one_sample
subs r8, r8, #1
beq 2f
b 1b
1: 1:
.rept 4 .rept 4
add_one_sample add_one_sample
@ -51,6 +63,7 @@ agb_arm_func \fn_name
subs r8, r8, #4 @ loop counter subs r8, r8, #4 @ loop counter
bne 1b @ jump back if we're done with the loop bne 1b @ jump back if we're done with the loop
2:
pop {{r4-r8}} pop {{r4-r8}}
bx lr bx lr
@ -90,6 +103,18 @@ agb_arm_func \fn_name
str r4, [r1], #4 @ store the new value, and increment the pointer str r4, [r1], #4 @ store the new value, and increment the pointer
.endm .endm
@ handle the non-multiple of 4 buffer size case
and r7, r8, #3
1:
subs r7, r7, #1
bmi 1f
add_one_sample_same_modification
subs r8, r8, #1
beq 2f
b 1b
1: 1:
.rept 4 .rept 4
add_one_sample_same_modification add_one_sample_same_modification
@ -99,6 +124,7 @@ agb_arm_func \fn_name
subs r8, r8, #4 @ loop counter subs r8, r8, #4 @ loop counter
bne 1b @ jump back if we're done with the loop bne 1b @ jump back if we're done with the loop
2:
pop {{r4-r8}} pop {{r4-r8}}
bx lr bx lr