0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,

	{AAESDEC, yaes, Pq, opBytes{0x38, 0xde, 0}},
	{AAESDECLAST, yaes, Pq, opBytes{0x38, 0xdf, 0}},
	{AAESIMC, yaes, Pq, opBytes{0x38, 0xdb, 0}},
	{AAESKEYGENASSIST, yxshuf, Pq, opBytes{0x3a, 0xdf, 0}},
	{AROUNDPD, yxshuf, Pq, opBytes{0x3a, 0x09, 0}},
	{AROUNDPS, yxshuf, Pq, opBytes{0x3a, 0x08, 0}},
	{AROUNDSD, yxshuf, Pq, opBytes{0x3a, 0x0b, 0}},
	{AROUNDSS, yxshuf, Pq, opBytes{0x3a, 0x0a, 0}},

		return 0x33 << 15
	case AROTRV:
		return 0x37 << 15
	case AADDV:
		return 0x21 << 15
	case AADDVU:
		return 0x21 << 15
	case ASUBV:
		return 0x23 << 15
	case ASUBVU, ANEGV:
		return 0x23 << 15

	case AMUL:
		return 0x38 << 15 // mul.w
	case AMULU:
		return 0x38 << 15 // mul.w
	case AMULH:
		return 0x39 << 15 // mulh.w
	case AMULHU:
		return 0x3a << 15 // mulhu.w

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	0x6f, 0x2e, 0x77, 0x6f, 0x72, 0x6b, 0x6c, 0x6f, 0x61, 0x64, 0x2e, 0x57, 0x6f, 0x72, 0x6b, 0x6c,
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	0x74, 0x74, 0x70, 0x32, 0x18, 0x07, 0x20, 0x01, 0x28, 0x08, 0x52, 0x05, 0x68, 0x74, 0x74, 0x70,
	0x32, 0x12, 0x14, 0x0a, 0x05, 0x68, 0x74, 0x74, 0x70, 0x33, 0x18, 0x0f, 0x20, 0x01, 0x28, 0x08,
	0x52, 0x05, 0x68, 0x74, 0x74, 0x70, 0x33, 0x12, 0x20, 0x0a, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x65,
	0x72, 0x46, 0x69, 0x72, 0x73, 0x74, 0x18, 0x08, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0b, 0x73, 0x65,

	ACASAD:  3<<30 | 0x47<<21 | 0x1f<<10,
	ACASAW:  2<<30 | 0x47<<21 | 0x1f<<10,
	ACASLD:  3<<30 | 0x45<<21 | 0x3f<<10,
	ACASLW:  2<<30 | 0x45<<21 | 0x3f<<10,
	ACASALD: 3<<30 | 0x47<<21 | 0x3f<<10,
	ACASALW: 2<<30 | 0x47<<21 | 0x3f<<10,
	ACASALH: 1<<30 | 0x47<<21 | 0x3f<<10,
	ACASALB: 0<<30 | 0x47<<21 | 0x3f<<10,
}
var atomicCASP = map[obj.As]uint32{
	ACASPD: 1<<30 | 0x41<<21 | 0x1f<<10,

		e.write(e.buf[:3])
	}

	// Add animation info if necessary.
	if len(e.g.Image) > 1 && e.g.LoopCount >= 0 {
		e.buf[0] = 0x21 // Extension Introducer.
		e.buf[1] = 0xff // Application Label.
		e.buf[2] = 0x0b // Block Size.
		e.write(e.buf[:3])
		_, err := io.WriteString(e.w, "NETSCAPE2.0") // Application Identifier.
		if err != nil && e.err == nil {
			e.err = err
			return
		}
		e.buf[0] = 0x03 // Block Size.