shl
shl(&u[0], m + n, d); /* u <<= d */
shl(&v[1], n - 1, d); /* v <<= d */
read_value <<= crbEntry->shl; /*Shift left operation */
uint8_t shl ;
value <<= hdr->shl;
uint8_t shl;
u_int sh, shl, shh;
shl = extract_field(instr, 31 - 19, 4);
sh = shh << 4 | shl;