}
		n := maxCoreSize + tokenLen(b.variants...) + tokenLen(b.extensions...)
		buf := make([]byte, n)
		p := t.genCoreBytes(buf)
		t.pVariant = byte(p)
		p += appendTokens(buf[p:], b.variants...)
		t.pExt = uint16(p)
		p += appendTokens(buf[p:], b.extensions...)
		t.str = string(buf[:p])
		// We may not always need to remake the string, but when or when not
		// to do so is rather tricky.
		scan := makeScanner(buf[:p])

	CMPL runtime·writeBarrier(SB), $0
	IMUL3Q $33, R15, AX // ERROR "when dynamic linking, R15 is clobbered by a global variable access and is used here"
	RET
TEXT ·a28(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	PEXTRD $0, X0, R15
	ADDQ $1, R15
	RET
TEXT ·a29(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	VPEXTRD $0, X0, R15
	ADDQ $1, R15
	RET
TEXT ·a30(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0

	PXOR        X2, X1

	MOVOA       rupoly<>+0(SB), X0

	MOVOA       X1, X2
	PAND        X3, X1
	PCLMULQDQ   $0x10, X0, X1
	PAND        X3, X1
	PCLMULQDQ   $0, X0, X1
	PXOR        X2, X1

	PEXTRD	$1, X1, AX
	MOVL        AX, ret+32(FP)