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feat(compiler): Add support for targeting WebAssembly.

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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
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19
templates/wasm/output_sound.wat Normal file
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{{- if not .Song.Output16Bit }}
(i64.store (global.get $outputBufPtr) (i64.load (i32.const 4128))) ;; load the sample from left & right channels as one 64bit int and store it in the address pointed by outputBufPtr
(global.set $outputBufPtr (i32.add (global.get $outputBufPtr) (i32.const 8))) ;; advance outputbufptr
{{- else }}
(local.set $channel (i32.const 0))
loop $channelLoop
(i32.store16 (global.get $outputBufPtr) (i32.trunc_f32_s
(f32.mul
(call $clip
(f32.load offset=4128 (i32.mul (local.get $channel) (i32.const 4)))
)
(f32.const 32767)
)
))
(global.set $outputBufPtr (i32.add (global.get $outputBufPtr) (i32.const 2)))
(br_if $channelLoop (local.tee $channel (i32.eqz (local.get $channel))))
end
{{- end }}
(i64.store (i32.const 4128) (i64.const 0)) ;; clear the left and right ports