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refactor(compiler): remove EncodedSong and pass patterns & sequences separately

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vsariola
2021-01-05 19:25:46 +02:00
parent 69f236dbd3
commit 1187c2a200
6 changed files with 118 additions and 129 deletions
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20
compiler/compiler.go
View File

@ -86,7 +86,7 @@ func (com *Compiler) Song(song *sointu.Song) (map[string]string, error) {
if err != nil { if err != nil {
return nil, fmt.Errorf(`could not encode patch: %v`, err) return nil, fmt.Errorf(`could not encode patch: %v`, err)
} }
encodedSong, err := EncodeSong(song) patterns, sequences, err := ConstructPatterns(song)
if err != nil { if err != nil {
return nil, fmt.Errorf(`could not encode song: %v`, err) return nil, fmt.Errorf(`could not encode song: %v`, err)
} }
@ -104,9 +104,12 @@ func (com *Compiler) Song(song *sointu.Song) (map[string]string, error) {
X86Macros X86Macros
SongMacros SongMacros
*EncodedPatch *EncodedPatch
EncodedSong *EncodedSong Patterns [][]byte
Hold int Sequences [][]byte
}{compilerMacros, featureSetMacros, x86Macros, songMacros, encodedPatch, encodedSong, 1} PatternLength int
SequenceLength int
Hold int
}{compilerMacros, featureSetMacros, x86Macros, songMacros, encodedPatch, patterns, sequences, len(patterns[0]), len(sequences[0]), 1}
populatedTemplate, extension, err = com.compile(templateName, &data) populatedTemplate, extension, err = com.compile(templateName, &data)
} else if com.Arch == "wasm" { } else if com.Arch == "wasm" {
wasmMacros := *NewWasmMacros() wasmMacros := *NewWasmMacros()
@ -116,9 +119,12 @@ func (com *Compiler) Song(song *sointu.Song) (map[string]string, error) {
WasmMacros WasmMacros
SongMacros SongMacros
*EncodedPatch *EncodedPatch
EncodedSong *EncodedSong Patterns [][]byte
Hold int Sequences [][]byte
}{compilerMacros, featureSetMacros, wasmMacros, songMacros, encodedPatch, encodedSong, 1} PatternLength int
SequenceLength int
Hold int
}{compilerMacros, featureSetMacros, wasmMacros, songMacros, encodedPatch, patterns, sequences, len(patterns[0]), len(sequences[0]), 1}
populatedTemplate, extension, err = com.compile(templateName, &data) populatedTemplate, extension, err = com.compile(templateName, &data)
} }
if err != nil { if err != nil {

78
compiler/encoded_song_test.go
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@ -1,78 +0,0 @@
package compiler_test
import (
"reflect"
"testing"
"github.com/vsariola/sointu"
"github.com/vsariola/sointu/compiler"
)
func TestPatternReusing(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}},
}
encodedSong, err := compiler.EncodeSong(&song)
if err != nil {
t.Fatalf("song encoding error: %v", err)
}
expected := compiler.EncodedSong{
Sequences: [][]byte{{0, 1}, {0, 2}},
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}},
}
if !reflect.DeepEqual(*encodedSong, expected) {
t.Fatalf("got different EncodedSong than expected. got: %v expected: %v", *encodedSong, expected)
}
}
func TestUnnecessaryHolds(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 1, 0, 0}, {72, 0, 1, 0, 1, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 1, 0}, {84, 0, 0, 0, 1, 1, 0, 0}},
Sequence: []byte{0, 1},
}},
}
encodedSong, err := compiler.EncodeSong(&song)
if err != nil {
t.Fatalf("song encoding error: %v", err)
}
expected := compiler.EncodedSong{
Sequences: [][]byte{{0, 1}, {0, 2}},
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}},
}
if !reflect.DeepEqual(*encodedSong, expected) {
t.Fatalf("got different EncodedSong than expected. got: %v expected: %v", *encodedSong, expected)
}
}
func TestDontCares(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}},
}
encodedSong, err := compiler.EncodeSong(&song)
if err != nil {
t.Fatalf("song encoding error: %v", err)
}
expected := compiler.EncodedSong{
Sequences: [][]byte{{0, 1}, {2, 1}},
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {1, 1, 1, 0, 0, 0, 0, 0}, {64, 1, 1, 1, 1, 1, 1, 1}},
}
if !reflect.DeepEqual(*encodedSong, expected) {
t.Fatalf("got different EncodedSong than expected. got: %v expected: %v", *encodedSong, expected)
}
}

28
compiler/encoded_song.go → compiler/patterns.go
View File

@ -7,14 +7,6 @@ import (
"github.com/vsariola/sointu" "github.com/vsariola/sointu"
) )
// EncodedSong has a single global pattern table and all track sequences are
// indices to this table. This is in contrast with sointu. Song, which has one
// pattern table per track.
type EncodedSong struct {
Patterns [][]byte
Sequences [][]byte
}
// fixPatternLength makes sure that every pattern is the same length. During // fixPatternLength makes sure that every pattern is the same length. During
// composing. Patterns shorter than the given length are padded with 1 / "hold"; // composing. Patterns shorter than the given length are padded with 1 / "hold";
// patterns longer than the given length are cropped. // patterns longer than the given length are cropped.
@ -174,19 +166,7 @@ func bytesToInts(array []byte) []int {
return ret return ret
} }
func (e *EncodedSong) PatternLength() int { func ConstructPatterns(song *sointu.Song) ([][]byte, [][]byte, error) {
return len(e.Patterns[0])
}
func (e *EncodedSong) SequenceLength() int {
return len(e.Sequences[0])
}
func (e *EncodedSong) TotalRows() int {
return e.SequenceLength() * e.PatternLength()
}
func EncodeSong(song *sointu.Song) (*EncodedSong, error) {
patLength := song.PatternRows() patLength := song.PatternRows()
sequences := make([][]byte, len(song.Tracks)) sequences := make([][]byte, len(song.Tracks))
var patterns [][]int var patterns [][]int
@ -201,7 +181,7 @@ func EncodeSong(song *sointu.Song) (*EncodedSong, error) {
var err error var err error
sequences[i], err = intsToBytes(sequence) sequences[i], err = intsToBytes(sequence)
if err != nil { if err != nil {
return nil, errors.New("the constructed pattern table would result in > 256 unique patterns; only 256 unique patterns are supported") return nil, nil, errors.New("the constructed pattern table would result in > 256 unique patterns; only 256 unique patterns are supported")
} }
} }
bytePatterns := make([][]byte, len(patterns)) bytePatterns := make([][]byte, len(patterns))
@ -210,8 +190,8 @@ func EncodeSong(song *sointu.Song) (*EncodedSong, error) {
replaceInts(pat, -1, 0) // replace don't cares with releases replaceInts(pat, -1, 0) // replace don't cares with releases
bytePatterns[i], err = intsToBytes(pat) bytePatterns[i], err = intsToBytes(pat)
if err != nil { if err != nil {
return nil, fmt.Errorf("invalid note in pattern, notes should be 0 .. 255: %v", err) return nil, nil, fmt.Errorf("invalid note in pattern, notes should be 0 .. 255: %v", err)
} }
} }
return &EncodedSong{Patterns: bytePatterns, Sequences: sequences}, nil return bytePatterns, sequences, nil
} }

81
compiler/patterns_test.go Normal file
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@ -0,0 +1,81 @@
package compiler_test
import (
"reflect"
"testing"
"github.com/vsariola/sointu"
"github.com/vsariola/sointu/compiler"
)
func TestPatternReusing(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}},
}
patterns, sequences, err := compiler.ConstructPatterns(&song)
if err != nil {
t.Fatalf("erorr constructing patterns: %v", err)
}
expectedSequences := [][]byte{{0, 1}, {0, 2}}
expectedPatterns := [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}}
if !reflect.DeepEqual(patterns, expectedPatterns) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
if !reflect.DeepEqual(sequences, expectedSequences) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
}
func TestUnnecessaryHolds(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 1, 0, 0}, {72, 0, 1, 0, 1, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 1, 0}, {84, 0, 0, 0, 1, 1, 0, 0}},
Sequence: []byte{0, 1},
}},
}
patterns, sequences, err := compiler.ConstructPatterns(&song)
if err != nil {
t.Fatalf("erorr constructing patterns: %v", err)
}
expectedSequences := [][]byte{{0, 1}, {0, 2}}
expectedPatterns := [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {72, 0, 0, 0, 0, 0, 0, 0}, {84, 0, 0, 0, 0, 0, 0, 0}}
if !reflect.DeepEqual(patterns, expectedPatterns) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
if !reflect.DeepEqual(sequences, expectedSequences) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
}
func TestDontCares(t *testing.T) {
song := sointu.Song{
Tracks: []sointu.Track{{
Patterns: [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}, {
Patterns: [][]byte{{64, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 0, 0, 0, 0, 0}},
Sequence: []byte{0, 1},
}},
}
patterns, sequences, err := compiler.ConstructPatterns(&song)
if err != nil {
t.Fatalf("erorr constructing patterns: %v", err)
}
expectedSequences := [][]byte{{0, 1}, {2, 1}}
expectedPatterns := [][]byte{{64, 1, 1, 1, 0, 0, 0, 0}, {1, 1, 1, 0, 0, 0, 0, 0}, {64, 1, 1, 1, 1, 1, 1, 1}}
if !reflect.DeepEqual(patterns, expectedPatterns) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
if !reflect.DeepEqual(sequences, expectedSequences) {
t.Fatalf("got different patterns than expected. got: %v expected: %v", patterns, expectedPatterns)
}
}

18
templates/amd64-386/player.asm
View File

@ -61,7 +61,7 @@ su_render_sampleloop: ; loop through every sample in the row
jl su_render_sampleloop jl su_render_sampleloop
{{.Pop .AX}} ; Stack: pushad ptr {{.Pop .AX}} ; Stack: pushad ptr
inc eax inc eax
cmp eax, {{.EncodedSong.TotalRows}} cmp eax, {{mul .PatternLength .SequenceLength}}
jl su_render_rowloop jl su_render_rowloop
; rewind the stack the entropy of multiple pop {{.AX}} is probably lower than add ; rewind the stack the entropy of multiple pop {{.AX}} is probably lower than add
{{- range slice .Stacklocs $prologsize}} {{- range slice .Stacklocs $prologsize}}
@ -91,7 +91,7 @@ su_render_sampleloop: ; loop through every sample in the row
{{- if ne .VoiceTrackBitmask 0}} {{- if ne .VoiceTrackBitmask 0}}
; The more complicated implementation: one track can trigger multiple voices ; The more complicated implementation: one track can trigger multiple voices
xor edx, edx xor edx, edx
mov ebx, {{.EncodedSong.PatternLength}} ; we could do xor ebx,ebx; mov bl,PATTERN_SIZE, but that would limit patternsize to 256... mov ebx, {{.PatternLength}} ; we could do xor ebx,ebx; mov bl,PATTERN_SIZE, but that would limit patternsize to 256...
div ebx ; eax = current pattern, edx = current row in pattern div ebx ; eax = current pattern, edx = current row in pattern
{{.Prepare "su_tracks"}} {{.Prepare "su_tracks"}}
lea {{.SI}}, [{{.Use "su_tracks"}}+{{.AX}}] ; esi points to the pattern data for current track lea {{.SI}}, [{{.Use "su_tracks"}}+{{.AX}}] ; esi points to the pattern data for current track
@ -100,7 +100,7 @@ su_render_sampleloop: ; loop through every sample in the row
mov {{.BP}}, {{.PTRWORD}} su_synth_obj ; ebp points to the current_voiceno array mov {{.BP}}, {{.PTRWORD}} su_synth_obj ; ebp points to the current_voiceno array
su_update_voices_trackloop: su_update_voices_trackloop:
movzx eax, byte [{{.SI}}] ; eax = current pattern movzx eax, byte [{{.SI}}] ; eax = current pattern
imul eax, {{.EncodedSong.PatternLength}} ; eax = offset to current pattern data imul eax, {{.PatternLength}} ; eax = offset to current pattern data
{{- .Prepare "su_patterns" .AX | indent 4}} {{- .Prepare "su_patterns" .AX | indent 4}}
movzx eax,byte [{{.Use "su_patterns" .AX}},{{.DX}}] ; eax = note movzx eax,byte [{{.Use "su_patterns" .AX}},{{.DX}}] ; eax = note
push {{.DX}} ; Stack: ptrnrow push {{.DX}} ; Stack: ptrnrow
@ -138,7 +138,7 @@ su_update_voices_skipreset:
su_update_voices_nexttrack: su_update_voices_nexttrack:
pop {{.BX}} ; ebx=first voice of next instrument, Stack: ptrnrow pop {{.BX}} ; ebx=first voice of next instrument, Stack: ptrnrow
pop {{.DX}} ; edx=patrnrow pop {{.DX}} ; edx=patrnrow
add {{.SI}}, {{.EncodedSong.SequenceLength}} add {{.SI}}, {{.SequenceLength}}
inc {{.BP}} inc {{.BP}}
{{- $addrname := len .Song.Tracks | printf "su_synth_obj + %v"}} {{- $addrname := len .Song.Tracks | printf "su_synth_obj + %v"}}
{{- .Prepare $addrname | indent 8}} {{- .Prepare $addrname | indent 8}}
@ -149,7 +149,7 @@ su_update_voices_nexttrack:
; The simple implementation: each track triggers always the same voice ; The simple implementation: each track triggers always the same voice
xor edx, edx xor edx, edx
xor ebx, ebx xor ebx, ebx
mov bl, {{.EncodedSong.PatternLength}} ; rows per pattern mov bl, {{.PatternLength}} ; rows per pattern
div ebx ; eax = current pattern, edx = current row in pattern div ebx ; eax = current pattern, edx = current row in pattern
{{- .Prepare "su_tracks" | indent 4}} {{- .Prepare "su_tracks" | indent 4}}
lea {{.SI}}, [{{.Use "su_tracks"}}+{{.AX}}]; esi points to the pattern data for current track lea {{.SI}}, [{{.Use "su_tracks"}}+{{.AX}}]; esi points to the pattern data for current track
@ -157,7 +157,7 @@ su_update_voices_nexttrack:
mov bl, {{len .Song.Tracks}} ; MAX_TRACKS is always <= 32 so this is ok mov bl, {{len .Song.Tracks}} ; MAX_TRACKS is always <= 32 so this is ok
su_update_voices_trackloop: su_update_voices_trackloop:
movzx eax, byte [{{.SI}}] ; eax = current pattern movzx eax, byte [{{.SI}}] ; eax = current pattern
imul eax, {{.EncodedSong.PatternLength}} ; multiply by rows per pattern, eax = offset to current pattern data imul eax, {{.PatternLength}} ; multiply by rows per pattern, eax = offset to current pattern data
{{- .Prepare "su_patterns" .AX | indent 8}} {{- .Prepare "su_patterns" .AX | indent 8}}
movzx eax, byte [{{.Use "su_patterns" .AX}} + {{.DX}}] ; ecx = note movzx eax, byte [{{.Use "su_patterns" .AX}} + {{.DX}}] ; ecx = note
cmp al, {{.Hold}} ; anything but hold causes action cmp al, {{.Hold}} ; anything but hold causes action
@ -173,7 +173,7 @@ su_update_voices_retrigger:
su_update_voices_nexttrack: su_update_voices_nexttrack:
add {{.DI}}, su_voice.size add {{.DI}}, su_voice.size
su_update_voices_skipadd: su_update_voices_skipadd:
add {{.SI}}, {{.EncodedSong.SequenceLength}} add {{.SI}}, {{.SequenceLength}}
dec ebx dec ebx
jnz short su_update_voices_trackloop jnz short su_update_voices_trackloop
ret ret
@ -185,7 +185,7 @@ su_update_voices_skipadd:
; Patterns ; Patterns
;------------------------------------------------------------------------------- ;-------------------------------------------------------------------------------
{{.Data "su_patterns"}} {{.Data "su_patterns"}}
{{- range .EncodedSong.Patterns}} {{- range .Patterns}}
db {{. | toStrings | join ","}} db {{. | toStrings | join ","}}
{{- end}} {{- end}}
@ -193,7 +193,7 @@ su_update_voices_skipadd:
; Tracks ; Tracks
;------------------------------------------------------------------------------- ;-------------------------------------------------------------------------------
{{.Data "su_tracks"}} {{.Data "su_tracks"}}
{{- range .EncodedSong.Sequences}} {{- range .Sequences}}
db {{. | toStrings | join ","}} db {{. | toStrings | join ","}}
{{- end}} {{- end}}

22
templates/wasm/player.wat
View File

@ -7,7 +7,7 @@
*/}} */}}
{{- .SetLabel "su_patterns"}} {{- .SetLabel "su_patterns"}}
{{- $m := .}} {{- $m := .}}
{{- range .EncodedSong.Patterns}} {{- range .Patterns}}
{{- range .}} {{- range .}}
{{- $.DataB .}} {{- $.DataB .}}
{{- end}} {{- end}}
@ -20,7 +20,7 @@
*/}} */}}
{{- .SetLabel "su_tracks"}} {{- .SetLabel "su_tracks"}}
{{- $m := .}} {{- $m := .}}
{{- range .EncodedSong.Sequences}} {{- range .Sequences}}
{{- range .}} {{- range .}}
{{- $.DataB .}} {{- $.DataB .}}
{{- end}} {{- end}}
@ -111,7 +111,7 @@
;; TODO: only export start and length with certain compiler options; in demo use, they can be hard coded ;; TODO: only export start and length with certain compiler options; in demo use, they can be hard coded
;; in the intro ;; in the intro
(global $outputStart (export "s") i32 (i32.const 8388608)) ;; TODO: do not hard code, layout memory somehow intelligently (global $outputStart (export "s") i32 (i32.const 8388608)) ;; TODO: do not hard code, layout memory somehow intelligently
(global $outputLength (export "l") i32 (i32.const {{if .Output16Bit}}{{mul .EncodedSong.TotalRows .Song.SamplesPerRow 4}}{{else}}{{mul .EncodedSong.TotalRows .Song.SamplesPerRow 8}}{{end}})) (global $outputLength (export "l") i32 (i32.const {{if .Output16Bit}}{{mul .PatternLength .SequenceLength .Song.SamplesPerRow 4}}{{else}}{{mul .PatternLength .SequenceLength .Song.SamplesPerRow 8}}{{end}}))
(global $output16bit (export "t") i32 (i32.const {{if .Output16Bit}}1{{else}}0{{end}})) (global $output16bit (export "t") i32 (i32.const {{if .Output16Bit}}1{{else}}0{{end}}))
@ -183,17 +183,17 @@
(br_if $sample_loop (i32.lt_s (global.get $sample) (i32.const {{.Song.SamplesPerRow}}))) (br_if $sample_loop (i32.lt_s (global.get $sample) (i32.const {{.Song.SamplesPerRow}})))
end end
(global.set $row (i32.add (global.get $row) (i32.const 1))) (global.set $row (i32.add (global.get $row) (i32.const 1)))
(br_if $row_loop (i32.lt_s (global.get $row) (i32.const {{.EncodedSong.PatternLength}}))) (br_if $row_loop (i32.lt_s (global.get $row) (i32.const {{.PatternLength}})))
end end
(global.set $pattern (i32.add (global.get $pattern) (i32.const 1))) (global.set $pattern (i32.add (global.get $pattern) (i32.const 1)))
(br_if $pattern_loop (i32.lt_s (global.get $pattern) (i32.const {{.EncodedSong.SequenceLength}}))) (br_if $pattern_loop (i32.lt_s (global.get $pattern) (i32.const {{.SequenceLength}})))
end end
) )
{{- if ne .VoiceTrackBitmask 0}} {{- if ne .VoiceTrackBitmask 0}}
;; the complex implementation of update_voices: at least one track has more than one voice ;; the complex implementation of update_voices: at least one track has more than one voice
(func $su_update_voices (local $si i32) (local $di i32) (local $tracksRemaining i32) (local $note i32) (local $firstVoice i32) (local $nextTrackStartsAt i32) (local $numVoices i32) (local $voiceNo i32) (func $su_update_voices (local $si i32) (local $di i32) (local $tracksRemaining i32) (local $note i32) (local $firstVoice i32) (local $nextTrackStartsAt i32) (local $numVoices i32) (local $voiceNo i32)
(local.set $tracksRemaining (i32.const {{len .EncodedSong.Sequences}})) (local.set $tracksRemaining (i32.const {{len .Sequences}}))
(local.set $si (global.get $pattern)) (local.set $si (global.get $pattern))
(local.set $nextTrackStartsAt (i32.const 0)) (local.set $nextTrackStartsAt (i32.const 0))
loop $track_loop loop $track_loop
@ -212,7 +212,7 @@
br_if $voiceLoop br_if $voiceLoop
end end
(i32.load8_u offset={{index .Labels "su_tracks"}} (local.get $si)) (i32.load8_u offset={{index .Labels "su_tracks"}} (local.get $si))
(i32.mul (i32.const {{.EncodedSong.PatternLength}})) (i32.mul (i32.const {{.PatternLength}}))
(i32.add (global.get $row)) (i32.add (global.get $row))
(i32.load8_u offset={{index .Labels "su_patterns"}}) (i32.load8_u offset={{index .Labels "su_patterns"}})
(local.tee $note) (local.tee $note)
@ -246,7 +246,7 @@
(i32.store8 offset=768 (local.get $tracksRemaining) (local.get $voiceNo)) (i32.store8 offset=768 (local.get $tracksRemaining) (local.get $voiceNo))
)) ))
)) ))
(local.set $si (i32.add (local.get $si) (i32.const {{.EncodedSong.SequenceLength}}))) (local.set $si (i32.add (local.get $si) (i32.const {{.SequenceLength}})))
(br_if $track_loop (local.tee $tracksRemaining (i32.sub (local.get $tracksRemaining) (i32.const 1)))) (br_if $track_loop (local.tee $tracksRemaining (i32.sub (local.get $tracksRemaining) (i32.const 1))))
end end
) )
@ -254,12 +254,12 @@
{{- else}} {{- else}}
;; the simple implementation of update_voices: each track has exactly one voice ;; the simple implementation of update_voices: each track has exactly one voice
(func $su_update_voices (local $si i32) (local $di i32) (local $tracksRemaining i32) (local $note i32) (func $su_update_voices (local $si i32) (local $di i32) (local $tracksRemaining i32) (local $note i32)
(local.set $tracksRemaining (i32.const {{len .EncodedSong.Sequences}})) (local.set $tracksRemaining (i32.const {{len .Sequences}}))
(local.set $si (global.get $pattern)) (local.set $si (global.get $pattern))
(local.set $di (i32.const 4160)) (local.set $di (i32.const 4160))
loop $track_loop loop $track_loop
(i32.load8_u offset={{index .Labels "su_tracks"}} (local.get $si)) (i32.load8_u offset={{index .Labels "su_tracks"}} (local.get $si))
(i32.mul (i32.const {{.EncodedSong.PatternLength}})) (i32.mul (i32.const {{.PatternLength}}))
(i32.add (global.get $row)) (i32.add (global.get $row))
(i32.load8_u offset={{index .Labels "su_patterns"}}) (i32.load8_u offset={{index .Labels "su_patterns"}})
(local.tee $note) (local.tee $note)
@ -271,7 +271,7 @@
)) ))
)) ))
(local.set $di (i32.add (local.get $di) (i32.const 4096))) (local.set $di (i32.add (local.get $di) (i32.const 4096)))
(local.set $si (i32.add (local.get $si) (i32.const {{.EncodedSong.SequenceLength}}))) (local.set $si (i32.add (local.get $si) (i32.const {{.SequenceLength}})))
(br_if $track_loop (local.tee $tracksRemaining (i32.sub (local.get $tracksRemaining) (i32.const 1)))) (br_if $track_loop (local.tee $tracksRemaining (i32.sub (local.get $tracksRemaining) (i32.const 1))))
end end
) )