Re: integer overflow during division

2021-02-19 Thread Bruno Haible
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integer overflow during division

2021-02-19 Thread Bruno Haible
Division by -1 is also known to cause signed integer overflow. In this case, on x86_64 CPUs, you don't even need a '-ftrapv' option. Test case: (poke) var x = -4611686018427387904; (poke) var y = 2*x; (poke) y / -1 Gleitkomma-Ausnahme (Speicherabzug geschrieben) In the debugger: (poke) var x = -