Maybe at least reformat it into two distinct columns
{$IFDEF DELPHIAVX}vpshufb ymm1, ymm0, [r9 + TAVXEncodeConst.Lut0];{$ELSE}db $C4,$C2,$7D,$00,$49,$20;{$ENDIF}
{$IFDEF DELPHIAVX}vpand ymm2, ymm1, [r9 + TAVXEncodeConst.Mask0];{$ELSE}db $C4,$C1,$75,$DB,$51,$60;{$ENDIF}
{$IFDEF DELPHIAVX}vpand ymm1, ymm1, [r9 + TAVXEncodeConst.Mask2];{$ELSE}db $C4,$C1,$75,$DB,$89,$A0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX}vpmulhuw ymm2, ymm2, [r9 + TAVXEncodeConst.Mask1];{$ELSE}db $C4,$C1,$6D,$E4,$91,$80,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX}vpmullw ymm1, ymm1, [r9 + TAVXEncodeConst.Mask3];{$ELSE}db $C4,$C1,$75,$D5,$89,$C0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX}vpor ymm1, ymm1, ymm2;{$ELSE}db $C5,$F5,$EB,$CA;{$ENDIF}
Like this:
{$IFDEF DELPHIAVX} vpshufb ymm1, ymm0, [r9 + TAVXEncodeConst.Lut0]; {$ELSE}db $C4,$C2,$7D,$00,$49,$20;{$ENDIF}
{$IFDEF DELPHIAVX} vpand ymm2, ymm1, [r9 + TAVXEncodeConst.Mask0]; {$ELSE}db $C4,$C1,$75,$DB,$51,$60;{$ENDIF}
{$IFDEF DELPHIAVX} vpand ymm1, ymm1, [r9 + TAVXEncodeConst.Mask2]; {$ELSE}db $C4,$C1,$75,$DB,$89,$A0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpmulhuw ymm2, ymm2, [r9 + TAVXEncodeConst.Mask1]; {$ELSE}db $C4,$C1,$6D,$E4,$91,$80,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpmullw ymm1, ymm1, [r9 + TAVXEncodeConst.Mask3]; {$ELSE}db $C4,$C1,$75,$D5,$89,$C0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpor ymm1, ymm1, ymm2; {$ELSE}db $C5,$F5,$EB,$CA;{$ENDIF}
or even better:
{$IFDEF DELPHIAVX} vpshufb ymm1, ymm0, [r9 + TAVXEncodeConst.Lut0]; {$ELSE}db $C4,$C2,$7D,$00,$49,$20;{$ENDIF}
{$IFDEF DELPHIAVX} vpand ymm2, ymm1, [r9 + TAVXEncodeConst.Mask0]; {$ELSE}db $C4,$C1,$75,$DB,$51,$60;{$ENDIF}
{$IFDEF DELPHIAVX} vpand ymm1, ymm1, [r9 + TAVXEncodeConst.Mask2]; {$ELSE}db $C4,$C1,$75,$DB,$89,$A0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpmulhuw ymm2, ymm2, [r9 + TAVXEncodeConst.Mask1]; {$ELSE}db $C4,$C1,$6D,$E4,$91,$80,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpmullw ymm1, ymm1, [r9 + TAVXEncodeConst.Mask3]; {$ELSE}db $C4,$C1,$75,$D5,$89,$C0,$00,$00,$00;{$ENDIF}
{$IFDEF DELPHIAVX} vpor ymm1, ymm1, ymm2; {$ELSE}db $C5,$F5,$EB,$CA;{$ENDIF}
Unreadable code is unmaintainable.