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

[Dmitry Gapkalov <gapkalov@...>]

But if I comment LUA_NUMBER_DOUBLE define in luaconf.h, compiler use

#define lua_number2int(i,n) ((i)=(int)(n)) 

construction, all work correctly.

2010/5/28 Vyacheslav Egorov <mister.aleph@gmail.com>

Double 0xFF000000 is too big to be represented by a signed integer.

You should get value from Lua stack as double then cast it to unsigned integer. 

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e.v.e

On Fri, May 28, 2010 at 12:14 PM, Dmitry Gapkalov <gapkalov@gmail.com> wrote:

On MSVC compiler this construction

#define lua_number2int(i,n)  __asm {__asm fld n   __asm fistp i}

Example:

bit.band(0xFF000000, 0x00FFFFFF)

while debug after getting from stack, the first value is 0x80000000, second 0xFFFFFF

--
With best wishes
Dmitry Gapkalov

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With best wishes
Dmitry Gapkalov