I'm translating a scientific C program into Go that is doing some 64bit floating point operations.
In this process I check that the same input yields the same output. Unfortunately they don't yield the same result, though the computation is simple. It is as follow. I receive a 64bit integer value. This value is converted to float64/double, and divided by 2^64. The resulting number is multiplied by 1e8. With C I get 41 6E 84 FD 00 09 90 D7, with Go I get 41 6E 84 FD 00 09 E6 8E. The last 15bits are different. The computation is performed with the same computer. Could it be that the C program is performing the computation with long double (80 bit) precision and that Go is doing it with 64bit precision ? Is there something I could do about it because that might be a red flag for replacing the C program with a Go program. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/f9b7a823-e010-4c51-9491-6da865754dc2n%40googlegroups.com.
