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refactor(vm): rename Commands/Values to Opcodes/Operands

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The commands and values were not very good names to what the
byte sequences actually are: opcodes and their operands. In
many other places, we were already calling the byte in the Command
stream as Opcode, so a logical name for a sequence of these is
Opcodes. Values is such a generic name that it's not immediately
clear that this sequence is related to the opcodes. Operands is not
perfect but clearly suggests that this sequence is related to
the Opcodes.
This commit is contained in:
5684185+vsariola@users.noreply.github.com
2023-10-18 19:51:56 +03:00
parent 87604dd92e
commit 01bf409929
14 changed files with 158 additions and 156 deletions
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28
vm/compiler/templates/amd64-386/patch.asm
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@ -5,15 +5,15 @@
; su_synth_obj.right : Set to 0 before calling
; _CX : Pointer to delay workspace (if needed)
; _DX : Pointer to synth object
; COM : Pointer to command stream
; VAL : Pointer to value stream
; COM : Pointer to opcode stream
; VAL : Pointer to operand stream
; WRK : Pointer to the last workspace processed
; Output: su_synth_obj.left : left sample
; su_synth_obj.right : right sample
; Dirty: everything
;-------------------------------------------------------------------------------
{{.Func "su_run_vm"}}
{{- .PushRegs .CX "DelayWorkSpace" .DX "Synth" .COM "CommandStream" .WRK "Voice" .VAL "ValueStream" | indent 4}}
{{- .PushRegs .CX "DelayWorkSpace" .DX "Synth" .COM "OpcodeStream" .WRK "Voice" .VAL "OperandStream" | indent 4}}
{{- if .RowSync}}
fild dword [{{.Stack "Sample"}}]
{{.Int .Song.SamplesPerRow | .Prepare | indent 8}}
@ -33,13 +33,13 @@ su_run_vm_loop: ; loop until all voices done
add {{.INP}}, su_voice.inputs
xor ecx, ecx ; counter = 0
xor eax, eax ; clear out high bits of eax, as lodsb only sets al
su_transform_values_loop:
su_transform_operands_loop:
{{- .Prepare "su_vm_transformcounts-1" | indent 4}}
cmp cl, byte [{{.Use "su_vm_transformcounts-1"}}+{{.DI}}] ; compare the counter to the value in the param count table
je su_transform_values_out
lodsb ; load the byte value from VAL stream
je su_transform_operands_out
lodsb ; load the operand from VAL stream
push {{.AX}} ; push it to memory so FPU can read it
fild dword [{{.SP}}] ; load the value to FPU stack
fild dword [{{.SP}}] ; load the operand value to FPU stack
{{- .Prepare (.Float 0.0078125) | indent 4}}
fmul dword [{{.Use (.Float 0.0078125)}}] ; divide it by 128 (0 => 0, 128 => 1.0)
fadd dword [{{.WRK}}+su_unit.ports+{{.CX}}*4] ; add the modulations in the current workspace
@ -48,8 +48,8 @@ su_transform_values_loop:
mov dword [{{.WRK}}+su_unit.ports+{{.CX}}*4], eax ; clear out the modulation ports
pop {{.AX}}
inc ecx
jmp su_transform_values_loop
su_transform_values_out:
jmp su_transform_operands_loop
su_transform_operands_out:
popf ; pop flags for the carry bit = stereo bit
{{- .SaveStack "Opcode"}}
{{- $x := printf "su_vm_jumptable-%v" .PTRSIZE}}
@ -65,11 +65,11 @@ su_run_vm_advance:
dec ecx ; decrement number of voices to process
bt dword [{{.Stack "PolyphonyBitmask"}}], ecx ; if voice bit of su_polyphonism not set
jnc su_op_advance_next_instrument ; goto next_instrument
mov {{.VAL}}, [{{.Stack "ValueStream"}}] ; if it was set, then repeat the opcodes for the current voice
mov {{.COM}}, [{{.Stack "CommandStream"}}]
mov {{.VAL}}, [{{.Stack "OperandStream"}}] ; if it was set, then repeat the opcodes for the current voice
mov {{.COM}}, [{{.Stack "OpcodeStream"}}]
su_op_advance_next_instrument:
mov [{{.Stack "ValueStream"}}], {{.VAL}} ; save current VAL as a checkpoint
mov [{{.Stack "CommandStream"}}], {{.COM}} ; save current COM as a checkpoint
mov [{{.Stack "OperandStream"}}], {{.VAL}} ; save current VAL as a checkpoint
mov [{{.Stack "OpcodeStream"}}], {{.COM}} ; save current COM as a checkpoint
su_op_advance_finish:
mov [{{.Stack "VoicesRemain"}}], ecx
jne su_run_vm_loop ; ZF was set by dec ecx
@ -95,7 +95,7 @@ su_op_advance_finish:
; su_nonlinear_map function: returns 2^(-24*x) of parameter number _AX
;-------------------------------------------------------------------------------
; Input: _AX : parameter number (e.g. for envelope: 0 = attac, 1 = decay...)
; INP : pointer to transformed values
; INP : pointer to transformed operands
; Output: st0 : 2^(-24*x), where x is the parameter in the range 0-1
;-------------------------------------------------------------------------------
{{.Func "su_nonlinear_map"}}