add more asm

encode_noasm.go

@@ -21,3 +21,35 @@ func enc16blk1(mask uint16, in, out []byte) {
 		binary.BigEndian.PutUint16(out[c+14:c+16], uint16(n&1)+mask)
 	}
 }
+
+// enc64blk2 for bit 2
+//    len(in)!=0, len(out)==len(in)*8
+//go:nosplit
+func enc64blk2(mask uint64, in, out []byte) {
+	for i, n := range in {
+		c := i * 8
+		x := (uint64(n)<<42 | uint64(n)<<28 | uint64(n)<<14 | uint64(n)) & 0x00030003_00030003
+		binary.BigEndian.PutUint64(out[c:c+8], x+mask)
+	}
+}
+
+// enc32blk4 for bit 4
+//    len(in)!=0, len(out)==len(in)*4
+//go:nosplit
+func enc32blk4(mask uint32, in, out []byte) {
+	for i, n := range in {
+		c := i * 4
+		x := (uint32(n)<<12 | uint32(n)) & 0x000f000f
+		binary.BigEndian.PutUint32(out[c:c+4], x+mask)
+	}
+}
+
+// enc16blk8 for bit 8
+//    len(in)!=0, len(out)==len(in)*2
+//go:nosplit
+func enc16blk8(mask uint16, in, out []byte) {
+	for i, n := range in {
+		c := i * 2
+		binary.BigEndian.PutUint16(out[c:c+2], uint16(n)+mask)
+	}
+}