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https://github.com/vsariola/sointu.git
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e4490faa2e
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.
19 lines
1.0 KiB
Plaintext
19 lines
1.0 KiB
Plaintext
{{- if not .Song.Output16Bit }}
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(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
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(global.set $outputBufPtr (i32.add (global.get $outputBufPtr) (i32.const 8))) ;; advance outputbufptr
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{{- else }}
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(local.set $channel (i32.const 0))
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loop $channelLoop
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(i32.store16 (global.get $outputBufPtr) (i32.trunc_f32_s
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(f32.mul
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(call $clip
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(f32.load offset=4128 (i32.mul (local.get $channel) (i32.const 4)))
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)
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(f32.const 32767)
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)
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))
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(global.set $outputBufPtr (i32.add (global.get $outputBufPtr) (i32.const 2)))
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(br_if $channelLoop (local.tee $channel (i32.eqz (local.get $channel))))
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end
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{{- end }}
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(i64.store (i32.const 4128) (i64.const 0)) ;; clear the left and right ports |