On Wed, Feb 13, 2019 at 11:23 AM Nigel Tao <nigel...@golang.org> wrote:
> Yes, both the Go code and the C code will panic if y is zero. Still,
> "-2147483648 % -1" has a sensible mathematical definition (zero), and
> C fails to calculate it.

I forgot to mention that, even with a mod-by-zero, Go lets you recover
the panic, instead of just letting the hardware issue a raw SIGFPE.
Explicitly checking y==0 (in Go's generated machine code) requires
some up-front computation, compared to the C code.

https://godbolt.org/z/3EPkq1 might be instructive (haha).

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