docs/stack-alignment

   1 Size and alignment requirements of stack values
   2 ===============================================
   3
   4 P  ... System.IntPtr
   5 I1 ... System.Int8
   6 I2 ... System.Int16
   7 I4 ... System.Int32
   8 I8 ... System.Int64
   9 F  ... System.Single
  10 D  ... System.Double
  11 LD ... native long double
  12
  13 -----------------------------------------------------------
  14 ARCH      |   P |  I1 |  I2 |  I4 |  I8 |  F  |   D |  LD |
  15 -----------------------------------------------------------
  16 X86       | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
  17 -----------------------------------------------------------
  18 X86/W32   | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
  19 -----------------------------------------------------------
  20 ARM       | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 | 8/4 |
  21 -----------------------------------------------------------
  22 M68K      | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
  23 -----------------------------------------------------------
  24 ALPHA     | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 |
  25 -----------------------------------------------------------
  26 SPARC     | 4/4 | 4/4 | 4/4 | 4/4 | 8/8 | 4/4 | 8/8 |16/8 |
  27 -----------------------------------------------------------
  28 SPARC64   | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 |16/16|
  29 -----------------------------------------------------------
  30 MIPS      | 4/4 | 4/4 | 4/4 | 4/4 | ?/? | 4/4 | 8/8 | 8/8 |
  31 -----------------------------------------------------------
  32           |     |     |     |     |     |     |     |     |
  33 -----------------------------------------------------------