mirror/sointu
1
0
Fork 0
mirror of https://github.com/vsariola/sointu.git synced 2025-07-18 21:14:31 -04:00
Code Issues Packages Projects Releases Wiki Activity

feat(compiler): Add support for targeting WebAssembly.

Browse Source 
The working principle is similar as before with x86, but instead of outputting .asm, it outputs .wat. This can be compiled into .wasm by using the wat2wasm assembler.
This commit is contained in:
Veikko Sariola
2020-12-26 23:16:18 +02:00
parent 7e4bcf18e4
commit e4490faa2e
32 changed files with 2138 additions and 170 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
templates/amd64-386/output_sound.asm Normal file
View File

@ -0,0 +1,44 @@
{{- if not .Song.Output16Bit }}
{{- if not .Clip }}
mov {{.DI}}, [{{.Stack "OutputBufPtr"}}] ; edi containts ptr
mov {{.SI}}, {{.PTRWORD}} su_synth_obj + su_synthworkspace.left
movsd ; copy left channel to output buffer
movsd ; copy right channel to output buffer
mov [{{.Stack "OutputBufPtr"}}], {{.DI}} ; save back the updated ptr
lea {{.DI}}, [{{.SI}}-8]
xor eax, eax
stosd ; clear left channel so the VM is ready to write them again
stosd ; clear right channel so the VM is ready to write them again
{{ else }}
mov {{.SI}}, qword [{{.Stack "OutputBufPtr"}}] ; esi points to the output buffer
xor ecx,ecx
xor eax,eax
%%loop: ; loop over two channels, left & right
do fld dword [,su_synth_obj+su_synthworkspace.left,_CX*4,]
{{.Call "su_clip"}}
fstp dword [_SI]
do mov dword [,su_synth_obj+su_synthworkspace.left,_CX*4,{],eax} ; clear the sample so the VM is ready to write it
add _SI,4
cmp ecx,2
jl %%loop
mov dword [_SP+su_stack.bufferptr - su_stack.output_sound], _SI ; save esi back to stack
{{ end }}
{{- else}}
mov {{.SI}}, [{{.Stack "OutputBufPtr"}}] ; esi points to the output buffer
mov {{.DI}}, {{.PTRWORD}} su_synth_obj+su_synthworkspace.left
mov ecx, 2
output_sound16bit_loop: ; loop over two channels, left & right
fld dword [{{.DI}}]
{{.Call "su_clip"}}
{{- .Float 32767.0 | .Prepare | indent 16}}
fmul dword [{{.Float 32767.0 | .Use}}]
push {{.AX}}
fistp dword [{{.SP}}]
pop {{.AX}}
mov word [{{.SI}}],ax ; // store integer converted right sample
xor eax,eax
stosd
add {{.SI}},2
loop output_sound16bit_loop
mov [{{.Stack "OutputBufPtr"}}], {{.SI}} ; save esi back to stack
{{- end }}