Eli Friedman wrote: >> Fred J. Tydeman wrote: >> For C programs, is there a way to tell the compiler what kind of floating-point unit (FPU) to generate code for? >> I am thinking of Intel CPUs with x87 versus sse. > clang doesn't support an explicit flag; it will use SSE/SSE2 where available, and x87 otherwise. You can force x87 with -mno-sse. Robert P.