barcstTable:
	MOVD    $·CastBarConst(SB),R3

startbarConst:
	LVX	(R3),const1
	LVX	(R3+off16),const2

	VSLDOI	$8,V0,V0,V1
	VXOR	V0,V1,V0

#ifdef REFLECT
	VSPLTISB $1,V1
	VSL	V0,V1,V0
#endif

	VAND	V0,mask_64bit,V0

#ifndef	REFLECT

	VPMSUMD	V0,const1,V1
	VSLDOI	$8,zeroes,V1,V1
	VPMSUMD	V1,const2,V1
	VXOR	V0,V1,V0
	VSLDOI	$8,V0,zeroes,V0

#else

	VSLDOI   $1, ZERO, T0, T1    // ...1
	VADDUBM  XC2, XC2, XC2       // 0xc2...
	VSPLTISB $7, T2
	VOR      XC2, T1, XC2        // 0xc2....01
	VSPLTB   $0, H, T1           // most significant byte
	VSL      H, T0, H            // H<<=1
	VSRAB    T1, T2, T1          // broadcast carry bit
	VAND     T1, XC2, T1
	VXOR     H, T1, IN           // twisted H

	VSLDOI $8, IN, IN, H      // twist even more ...