if (ch2 >= SP_LOW_FIRST && ch2 <= SP_LOW_LAST) {
pair = ((ucs_ch - SP_HIGH_FIRST) << SP_HALF_SHIFT)
+ (ch2 - SP_LOW_FIRST) + SP_HALF_BASE;
if (ch2 >= SP_LOW_FIRST && ch2 <= SP_LOW_LAST) {
pair = ((ucs_ch - SP_HIGH_FIRST) << SP_HALF_SHIFT)
+ (ch2 - SP_LOW_FIRST) + SP_HALF_BASE;