HelenOS sources

FPSR_CTRL_TD       89 kernel/arch/ia64/include/arch/register.h #define FPSR_CTRL_TD            (1 << 6)
FPSR_CTRL_TD       89 uspace/lib/c/arch/ia64/include/libarch/register.h #define FPSR_CTRL_TD            (1 << 6)
HelenOS homepage, sources at GitHub