Hi guys, i was trying to make another RE to the RE decoder, using the other RE made for other users, but modified a little bit:
I want to know how exactli work the part of:
Couse on accelerator setup for dmai need $AC1.M Values, andd i want to kwno if i may use it like PB.Format ==5. Greets
Code:
//////////////////////////////////////////// 0x08 DECODER
// Hardcoded destination 0x0580.
void Decoder0x08() {
098f 0092 0004 lri $CR, #0x0004
0991 2002 lrs $AX0.L, @0x0002
0992 8100 clr $ACC0
0993 8900 clr $ACC1
0994 2430 lrs $AC0.L, @0x0030 // CurSampleFrac
$AX0.L = PB.RatioInt;
$AC0.L = PB.CurSampleFrac;
// 0995 8d00 set15
// 0996 0950 lris $AX1.L, #0x50
// 0997 a000 mulx $AX0.L, $AX1.L
// 0998 a400 mulxac $AX0.L, $AX1.L, $ACC0
// 0999 1404 lsl $ACC0, #4
// 099a 8c00 clr15
// Compute how much data we need to read, to get 0x50 samples after resampling.
// AC0.L is cursamplefrace, AX0.L is ratio.
$ACC0 = PB.CurrentSampleFrac + 0x50 * PB.Ratio;
099b 1ffe mrr $AC1.M, $AC0.M
099c 0083 0580 lri $AR3, #0x0580
// 099e 2201 lrs $AX0.H, @0x0001
// 099f 8600 tstaxh $AX0.H
// 09a0 0294 09b1 jnz 0x09b1
if (PB.KeyOff)
goto clear_buffer;
// 09a2 2204 lrs $AX0.H, @0x0004
// 09a3 8600 tstaxh $AX0.H
// 09a4 02b4 09f9 callne 0x09f9
if (PB.NeedsReset)
{
09f9_UpdateSampleCounters8();
}
09a6 8100 clr $ACC0
// 09a7 2605 lrs $AC0.M, @0x0005
// 09a8 b100 tst $ACC0
// 09a9 0295 09be jz 0x09be
if (PB.ReachedEnd)
{
09be_SetupAccelerator
reached_end:
09ab 8100 clr $ACC0
09ac 2e05 srs @0x0005, $AC0.M
PB.ReachedEnd = 0;
09ad 2281 lrs $AX0.H, @0xff81
09ae 8600 tstaxh $AX0.H
09af 0294 09b8 jnz 0x09b8
if (!RepeatMode)
{
clear_buffer:
09b1 8100 clr $ACC0
// 09b2 005f loop $AC1.M
// 09b3 1b7e srri @$AR3, $AC0.M
// 09b4 7400 incm $AC0.M
// 09b5 2e01 srs @0x0001, $AC0.M
// 09b6 029f 09f2 jmp 0x09f2
for (u32 i = 0; i < rem_samples; i++)
*_Buffer++ = 0;
PB.KeyOff = 1;
return;
}
else
{
// 09b8 2688 lrs $AC0.M, @0xff88
// 09b9 2489 lrs $AC0.L, @0xff89
// 09ba 2e34 srs @0x0034, $AC0.M
// 09bb 2c35 srs @0x0035, $AC0.L
// 09bc 02bf 09f9 call 0x09f9
PB.RestartPos = PB.LoopStartPos;
09f9_UpdateSampleCounters8();
}
}
09be 00ff 0360 sr @0x0360, $AC1.M
09c0 2638 lrs $AC0.M, @0x0038
09c1 2439 lrs $AC0.L, @0x0039
09c2 0f05 lris $AC1.M, #0x05 // Sample format 5, how we can use this?
// 09c3 02bf 05ad call 0x05ad
void 05ad_SetupAccelerator(_acceleratorH(PB.CurAddr), _accleratorL(0x0039), _format(0x05))
{
*SampleFormat = AC1.M
*ACCAH/ACCAL = PB.CurAddr >> ((0x05 & 3) - 1);
}
09c5 00df 0360 lr $AC1.M, @0x0360
09c7 8100 clr $ACC0
// 09c8 263a lrs $AC0.M, @0x003a
// 09c9 b100 tst $ACC0
// 09ca 0294 09d9 jnz 0x09d9
if (!PB.RemLength)
{
// 09cc 263b lrs $AC0.M, @0x003b
// 09cd 5c00 sub $ACC0, $ACC1
// 09ce 0290 09d9 jge 0x09d9
PB.CurAddr = 0x003b
$ACC0 -= $ACC1
$AX0.H = PB.RemLength
09d0 223b lrs $AX0.H, @0x003b
// 09d1 02bf 0a0a call 0x0a0a // Load more samples.
void 0a0a_ReadFromAccelerator8To16(OutBuffer($AR3), Count($AX0.H))
{
for (int i = 0; i < PB.RemLength; i++)
*_Buffer++ = (s8)(*read_ptr++) << 8; // ffd3 is the non-adpcm alternative read address for the accelerator.
}
// 09d3 5500 subr $ACC1, $AX0.H
// 09d4 0a01 lris $AX0.H, #0x01
// 09d5 00fa 0405 sr @0x0405, $AX0.H
// 09d7 029f 09ab jmp 0x09ab
rem_samples -= PB.RemLength
PB.ReachedEnd = 1;
goto reached_end;
}
else
{
09d9 1f5f mrr $AX0.H, $AC1.M
$AX0.H = 0x05 = 0x0360
// 09da 02bf 0a0a call 0x0a0a // Load more samples.
void 0a0a_ReadFromAccelerator8To16(OutBuffer($AR3), Count($AX0.H))
{
for (int i = 0; i < (PB.Format == 5); i++)
*_Buffer++ = (s8)(*read_ptr++) << 8;
}
// Stash AX0.H away, it gets read again at 09ef.
09dc 00fa 0362 sr @0x0362, $AX0.H
09de 8100 clr $ACC0
// 09df 263a lrs $AC0.M, @0x003a
// 09e0 243b lrs $AC0.L, @0x003b
// 09e1 1570 lsr $ACC1, #-16
$AC0.M = PB.RemLength
$ACC1 = (rem_samples << 16)
// 09e2 0a01 lris $AX0.H, #0x01
// 09e3 0081 0405 lri $AR1, #0x0405
// 09e5 5c00 sub $ACC0, $ACC1
// 09e6 b100 tst $ACC0
// 09e7 0275 ifz
// 09e8 1a3a srr @$AR1, $AX0.H
PB.RemLength -= (rem_samples << 16);
if(PB.RemLength == 0)
PB.ReachedEnd = 1;
}
09e9 2e3a srs @0x003a, $AC0.M
09ea 2c3b srs @0x003b, $AC0.L
09eb 2638 lrs $AC0.M, @0x0038
09ec 2439 lrs $AC0.L, @0x0039
09ed 00d8 0362 lr $AX0.L, @0x0362
PB.RemLength = PB.CurAddr
09ef 7000 addaxl $ACC0, $AX0.L
09f0 2c39 srs @0x0039, $AC0.L
09f1 2e38 srs @0x0038, $AC0.M
PB.RemLength = PB.CurAddr + PB.Format
// 09f2 0092 00ff lri $CR, #0x00ff
// 09f4 029f 02d0 jmp 0x02d0
GOTO Resample_From0580To0520:
}I want to know how exactli work the part of:
Code:
09c2 0f05 lris $AC1.M, #0x05 // Sample format 5, howCouse on accelerator setup for dmai need $AC1.M Values, andd i want to kwno if i may use it like PB.Format ==5. Greets