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Use strucs for stack locations, instead of hard-coding them everywhere.

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This commit is contained in:
Veikko Sariola 2020-05-21 17:43:14 +03:00
parent 654e5868bc
commit afbff66e36
2 changed files with 25 additions and 15 deletions
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24
src/opcodes/flowcontrol.asm
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@ -21,28 +21,28 @@ SECT_TEXT(suopadvn)
%ifdef INCLUDE_POLYPHONY
EXPORT MANGLE_FUNC(su_op_advance,0) ; Stack: addr voice wrkptr valptr comptr
mov WRK, [_SP+PTRSIZE*2] ; WRK = wrkptr
mov WRK, [_SP+su_stack.wrk] ; WRK = wrkptr
add WRK, su_voice.size ; move to next voice
mov [_SP+PTRSIZE*2], WRK ; update stack
mov ecx, [_SP+PTRSIZE] ; ecx = voice
mov [_SP+su_stack.wrk], WRK ; update stack
mov ecx, [_SP+su_stack.voiceno] ; ecx = voice
apply bt dword,su_polyphony_bitmask,{,ecx} ; if voice bit of su_polyphonism not set
jnc su_op_advance_next_instrument ; goto next_instrument
mov VAL, PTRWORD [_SP+PTRSIZE*3] ; rollback to where we were earlier
mov COM, PTRWORD [_SP+PTRSIZE*4]
mov VAL, PTRWORD [_SP+su_stack.val] ; rollback to where we were earlier
mov COM, PTRWORD [_SP+su_stack.com]
jmp short su_op_advance_finish
su_op_advance_next_instrument:
mov PTRWORD [_SP+PTRSIZE*3], VAL ; save current VAL as a checkpoint
mov PTRWORD [_SP+PTRSIZE*4], COM ; save current COM as a checkpoint
mov PTRWORD [_SP+su_stack.val], VAL ; save current VAL as a checkpoint
mov PTRWORD [_SP+su_stack.com], COM ; save current COM as a checkpoint
su_op_advance_finish:
inc PTRWORD [_SP+PTRSIZE]
inc PTRWORD [_SP+su_stack.voiceno]
ret
%else
EXPORT MANGLE_FUNC(su_op_advance,0) ; Stack: addr voice wrkptr valptr comptr
mov WRK, PTRWORD [_SP+PTRSIZE*2] ; WRK = wrkptr
mov WRK, PTRWORD [_SP+su_stack.wrk] ; WRK = wrkptr
add WRK, su_voice.size ; move to next voice
mov PTRWORD [_SP+PTRSIZE*2], WRK ; update stack
inc PTRWORD [_SP+PTRSIZE] ; voice++
mov PTRWORD [_SP+su_stack.wrk], WRK ; update stack
inc PTRWORD [_SP+su_stack.voiceno] ; voice++
ret
%endif
@ -65,7 +65,7 @@ EXPORT MANGLE_FUNC(su_op_speed,0)
fist dword [_SP] ; Main stack: k=int(t+2^p-1)
fisub dword [_SP] ; t+2^p-1-k, the remainder
pop _AX
add dword [_SP+6*PTRSIZE], eax ; add the whole ticks to song tick count, [esp+24] is the current tick in the row
add dword [_SP+su_stack.curtick], eax ; add the whole ticks to song tick count, [esp+24] is the current tick in the row
fstp dword [WRK+su_speed_wrk.remainder] ; save the remainder for future
ret

16
src/sointu.asm
View File

@ -93,6 +93,16 @@
%endmacro
%endif
struc su_stack ; the structure of stack _as the units see it_
.retaddr RESPTR 1
.voiceno RESPTR 1
.wrk RESPTR 1
.val RESPTR 1
.com RESPTR 1
.retaddrvm RESPTR 1
.curtick RESPTR 1
endstruc
;===============================================================================
; Uninitialized data: The one and only synth object
;===============================================================================
@ -174,13 +184,13 @@ su_run_vm_loop: ; loop until all voices done
apply {mov al,byte},su_opcode_numparams,_AX,{}
push _AX
call su_transform_values
mov _CX, PTRWORD [_SP+2*PTRSIZE]
mov _CX, PTRWORD [_SP+su_stack.wrk]
pop _AX
shr eax,1
apply call,su_synth_commands,_AX*PTRSIZE,{} ; call the function corresponding to the instruction
cmp dword [_SP],MAX_VOICES ; if (voice < MAX_VOICES)
cmp dword [_SP+su_stack.voiceno-PTRSIZE],MAX_VOICES ; if (voice < MAX_VOICES)
jl su_run_vm_loop ; goto vm_loop
add _SP, 4*PTRSIZE ; Stack cleared
add _SP, su_stack.retaddrvm-PTRSIZE ; Stack cleared
ret
;-------------------------------------------------------------------------------