(Move [s-s%16]
		(OffPtr <dst.Type> dst [s%16])
		(OffPtr <src.Type> src [s%16])
		(MOVQstore [8] dst (MOVQload [8] src mem)
			(MOVQstore dst (MOVQload src mem) mem)))

// Medium copying uses a duff device.
(Move [s] dst src mem)
	&& s > 64 && s <= 16*64 && s%16 == 0
	&& !config.noDuffDevice && logLargeCopy(v, s) =>
	(DUFFCOPY [s] dst src mem)

// Large copying uses REP MOVSQ.

(Zero [3] ptr mem) =>
	(MOVBstore [2] ptr (MOVWconst [0])
		(MOVBstore [1] ptr (MOVWconst [0])
			(MOVBstore [0] ptr (MOVWconst [0]) mem)))

// Medium zeroing uses a duff device
// 4 and 128 are magic constants, see runtime/mkduff.go
(Zero [s] {t} ptr mem)
	&& s%4 == 0 && s > 4 && s <= 512
	&& t.Alignment()%4 == 0 && !config.noDuffDevice =>

		(Zero [s-s%16] ptr mem))
(Zero [s] ptr mem) && s%16 != 0 && s%16 > 8 && s > 16 =>
	(Zero [16]
		(OffPtr <ptr.Type> ptr [s-16])
		(Zero [s-s%16] ptr mem))

// medium zeroing uses a duff device
// 4, 16, and 64 are magic constants, see runtime/mkduff.go
(Zero [s] ptr mem)
	&& s%16 == 0 && s > 64 && s <= 16*64
	&& !config.noDuffDevice =>
	(DUFFZERO [4 * (64 - s/16)] ptr mem)

		// TODO(rsc): DUFFZERO/DUFFCOPY encoding forgot to set a->index
		// and got Yi32 in an earlier version of this code.
		// Keep doing that until we fix yduff etc.
		if a.Sym != nil && strings.HasPrefix(a.Sym.Name, "runtime.duff") {
			return Yi32
		}

		if a.Sym != nil || a.Name != obj.NAME_NONE {
			ctxt.Diag("unexpected addr: %v", obj.Dconv(p, a))
		}
		fallthrough

	case obj.TYPE_CONST:
		if a.Sym != nil {

                **Example**

                ```python
                from fastapi import FastAPI

                app = FastAPI(summary="Deadpond's favorite app. Nuff said.")
                ```
                """
            ),
        ] = None,
        description: Annotated[
            str,
            Doc(
                '''

leb.io/hashland,v0.0.0-20171003003232-07375b562dea,h1:s9IkzZTqYqw77voO6taUZHc0C1B096h4T/kQtujGApE=,0698177f24cbde0a7b45495e7fe976fe7623f2b9205995b7d91fd2e7b0f0e243
leb.io/hrff,v0.0.0-20170927164517-757f8bd43e20,h1:9CHS8LIq9MDwUsAaCHUsbUq7zb5lSjLQYWlJ/AbMZKg=,538008712599401a903a7982714c0a9ae745221042d3dfb1437bc508d8fb9e96

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