mirror/sointu
1
0
Fork 0
mirror of https://github.com/vsariola/sointu.git synced 2025-06-04 01:28:45 -04:00
Code Issues Packages Projects Releases Wiki Activity

Improve comments for UpdateInstrument

Browse Source
This commit is contained in:
Veikko Sariola 2020-05-04 20:19:58 +03:00
parent 6be7959cd1
commit 5c1b87f254
1 changed files with 15 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/4klang.asm
View File

@ -1202,6 +1202,11 @@ go4kACC_func_loop:
;------------------------------------------------------------------------------- ;-------------------------------------------------------------------------------
; Update Instrument (allocate voices, set voice to release) ; Update Instrument (allocate voices, set voice to release)
;------------------------------------------------------------------------------- ;-------------------------------------------------------------------------------
; Input: [esp+8] : current tick
; ecx : instrument number
; edi : pointer to the instrument struct of first voice
; Dirty: eax,edx
;-------------------------------------------------------------------------------
SECT_TEXT(g4kcodw) SECT_TEXT(g4kcodw)
go4kUpdateInstrument: go4kUpdateInstrument:
@ -1225,20 +1230,20 @@ go4kUpdateInstrument:
jl short go4kUpdateInstrument_done jl short go4kUpdateInstrument_done
%if MAX_VOICES > 1 %if MAX_VOICES > 1
pushad pushad
xchg eax, dword [go4k_voiceindex + ecx*4] xchg eax, dword [go4k_voiceindex + ecx*4] ; eax = current voice index
test eax, eax test eax, eax ; if (eax == 0)
je go4kUpdateInstrument_newNote je go4kUpdateInstrument_newNote ; goto newnote
add edi, go4k_instrument.size add edi, go4k_instrument.size ; move edi to point to second voice
go4kUpdateInstrument_newNote: go4kUpdateInstrument_newNote: ; newnote:
xor al,1 xor al,1 ; current voice = 1 - current voice
xchg dword [go4k_voiceindex + ecx*4], eax xchg dword [go4k_voiceindex + ecx*4], eax ; save current voice
%endif %endif
pushad pushad
xor eax, eax xor eax, eax
mov ecx, (8+MAX_UNITS*MAX_UNIT_SLOTS*4)/4 ; // clear only relase, note and workspace mov ecx, (8+MAX_UNITS*MAX_UNIT_SLOTS*4)/4 ; clear relase, note and workspace
rep stosd rep stosd ; but don't clear output signals
popad popad
mov dword [edi+4], edx ; // set requested note as current note mov dword [edi+4], edx ; set go4k_instrument.note as current note
%if MAX_VOICES > 1 %if MAX_VOICES > 1
popad popad
%endif %endif