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fix(templates/amd64-386, tests): fix global stereo sends and add regression test for future

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the send asm code is quite ugly atm (pushf & popf to save stereo flag), but the new regression test should ensure we don't break it again if we eventually refactor it
This commit is contained in:
vsariola
2021-02-15 14:48:16 +02:00
parent c60f6e0f0e
commit 5f7eed4194
4 changed files with 44 additions and 8 deletions
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14
templates/amd64-386/sinks.asm
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@ -89,6 +89,14 @@ su_op_aux_mono:
{{.Func "su_op_send" "Opcode"}}
lodsw
mov {{.CX}}, [{{.Stack "Voice"}}] ; load pointer to voice
{{- if .SupportsParamValueOtherThan "send" "voice" 0}}
pushf ; uh ugly: we save the flags just for the stereo carry bit. Doing the .CX loading later crashed the synth for stereo sends as loading the synth address from stack was f'd up by the "call su_op_send_mono"
test {{.AX}}, 0x8000
jz su_op_send_skipglobal
mov {{.CX}}, [{{.Stack "Synth"}} + {{.PTRSIZE}}]
su_op_send_skipglobal:
popf
{{- end}}
{{- if .StereoAndMono "send"}}
jnc su_op_send_mono
{{- end}}
@ -102,12 +110,6 @@ su_op_aux_mono:
jnz su_op_send_mono
fxch ; swap them back: l r
su_op_send_mono:
{{- end}}
{{- if .SupportsParamValueOtherThan "send" "voice" 0}}
test {{.AX}}, 0x8000
jz su_op_send_skipglobal
mov {{.CX}}, [{{.Stack "Synth"}}]
su_op_send_skipglobal:
{{- end}}
test {{.AX}}, 0x8 ; if the SEND_POP bit is not set
jnz su_op_send_skippush