DELPHI 32位与64位数据类型大小

Delphi32-bit and 64-bit Windows built-in type sizes

Integral types

On Win64, NativeInt is twice the size of the Win32 NativeInt, and NativeUInt is twice the size of the Win32 NativeUInt.

Pointer types

On 64-bit Windows, all pointer types are 8 bytes, twice the size on 32-bit Windows.

Procedure of object

On 64-bit Windows, the alignment for a procedure of object is 16 bytes, twice the size on 32-bit Windows.

Floating-point types (including the Extended data type)

The Extended type has 2 bytes' worth lessprecision on 64-bit Windows than on 32-bit Windows (8 bytes vs 10 bytes)..

For more information, see The Extended Data Type Is 2 Bytes Smaller on 64-bit Windows Systems.

Other types

On Win64, file size has increased.

Constants