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Don't need to save r9

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Gwilym Inzani 2023-06-16 22:11:44 +01:00
parent 20a7c262e9
commit 6cf3ecaf36
1 changed files with 1 additions and 2 deletions
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3
agb/src/sound/mixer/mixer.s
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@ -100,7 +100,6 @@ agb_arm_func agb_rs__mixer_add_stereo
@ The sound buffer must be SOUND_BUFFER_SIZE * 2 in size = 176 * 2 @ The sound buffer must be SOUND_BUFFER_SIZE * 2 in size = 176 * 2
push {{r4-r9}} push {{r4-r9}}
mov r9, r2
ldr r5, =0x00000FFF ldr r5, =0x00000FFF
ldr r8, =agb_rs__buffer_size ldr r8, =agb_rs__buffer_size
@ -130,7 +129,7 @@ agb_arm_func agb_rs__mixer_add_stereo
lsl r6, r6, #24 @ r6 = | R | 0 | 0 | 0 | drop everything except the right sample lsl r6, r6, #24 @ r6 = | R | 0 | 0 | 0 | drop everything except the right sample
orr r6, r7, r6, asr #8 @ r6 = | 1 | R | 1 | L | now we have it perfectly set up orr r6, r7, r6, asr #8 @ r6 = | 1 | R | 1 | L | now we have it perfectly set up
mla r4, r6, r9, r4 @ r4 += r6 * r9 (calculating both the left and right samples together) mla r4, r6, r2, r4 @ r4 += r6 * r2 (calculating both the left and right samples together)
str r4, [r1], #4 @ store the new value, and increment the pointer str r4, [r1], #4 @ store the new value, and increment the pointer
.endr .endr