RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

sound, fixes for ym2612 (ARM and C)

Browse source
This commit is contained in:
kub 2023-06-21 18:15:33 +00:00
parent 70ef073f66
commit f3876af7f9
2 changed files with 19 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

20
pico/sound/ym2612_arm.S
View file

@ -198,10 +198,10 @@
ldrb r2, [r5,#0x17] @ state
ldrh r3, [r5,#0x1a] @ volume
tst r0, #0x08 @ ssg enabled &&
beq 9f
beq 10f
cmp r2, #EG_REL+1 @ state > EG_REL &&
cmpge r3, #0x200 @ volume >= 0x200?
blt 9f
blt 10f
tst r0, #0x01
beq 1f
@ -245,6 +245,15 @@
movgt r2, #EG_ATT
8: strb r2, [r5,#0x17] @ state
9:
ldrb r0, [r5,#0x30] @ ssg
ldrh r2, [r5,#0x18] @ tl
cmp r0, #0x0c
rsbge r3, r3, #0x200 @ volume = (0x200-volume) & MAX_ATT
movge r3, r3, lsl #22
movge r3, r3, lsr #22
add r3, r3, r2 @ volume += tl
strh r3, [r5,#0x34] @ vol_out
10:
.endm
@ r5=slot, trashes: r0,r2,r3
@ -703,11 +712,11 @@ ssg_upd_loop:
addne lr, lr, #4
addne r5, r5, #SLOT_STRUCT_SIZE
#else
add lr, lr, #4*2
add lr, lr, #4
add r5, r5, #SLOT_STRUCT_SIZE*2
update_ssg_eg
subs r6, r6, #2
subne lr, lr, #4
addne lr, lr, #4
subne r5, r5, #SLOT_STRUCT_SIZE
#endif
bne ssg_upd_loop
@ -861,8 +870,9 @@ crl_smp_loop_end:
cmn r1, r0, asr #13
subne r0, r1, #0x80000001
movne r0, r0, asr #18
tst r4, r1, lsl #7 @ (sample < 0) && dac?
tst r4, #0x80 @ dac?
bicne r0, r0, #0x1f
tst r4, r1, lsl #7 @ (sample < 0) && dac?
subne r0, r0, #7<<5
tst r12, #1
beq ctl_sample_mono