barrel shifter byte-shift then bit-shift QuartusII DE0 target 207LE/284.41MHz

sll64_8_8.v

module sll64_byte (indata,val_nnnnxxx,outdata);
  input [63:0] indata;
	input [3:0] val_nnnnxxx; // shift
	output [63:0] outdata;
	assign outdata=indata<<(val_nnnnxxx<<3);
endmodule

module sll64_8bit (indata,val,outdata);
	input [63:0] indata;
	input [2:0] val; // shift 0-7
	output [63:0] outdata;
	assign outdata=indata<<val;
endmodule

module sll64_8_8 (indata,val,outdata);
	input [63:0] indata;
	input [63:0] val;
	output [63:0] outdata;
	wire [63:0] byteout;
	sll64_byte sllbyte(indata,val[6:3],byteout);
//	sll64_8bit sll8bit(byteout,val[2:0],outdata);
	lpm_clshifa sll8bit(byteout,val[2:0],outdata); // ALTERA Megafunction
endmodule