Re: lua_number2int in bitwise operators Lua 5.2 work 3 (MSVC)

[Roberto Ierusalimschy <roberto@...>]

> >Another hypothesis is that the compiler is transforming the
> >snippet "fistp m64; mov r32, mem" into "fistp m32; mov r32, mem"
> >because it forgot that there can be side-effects from narrowing a
> >64 bit fistp into a 32 bit fistp, even if the upper 32 bits of the
> >64 bit result are never used.
> 
> Time to check the assembly output I guess, but this is MSVC which I
> am still avoiding installing... I do feel bad throwing about
> armchair hypotheses, so I'll slinker away for now and find some time
> later to see for myself the behaviour of fistp in compiler-generated
> code... :-)

What is the bug, to begin with? In my tests (MSVC) everything works
fine.

-- Roberto