fp_force_eval
#define fp_force_eval fp_force_eval
#ifndef fp_force_eval
#define fp_force_eval fp_force_eval
fp_force_eval(x); \
fp_force_eval(fp_barrier(0x1p-1022) * 0x1p-1022);
fp_force_eval(fp_barrier(0x1p-1022) * 0x1p-1022);
fp_force_eval(fp_barrier(0x1p-1022) * 0x1p-1022);