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svn path=/trunk/mono/; revision=3177

docs/stack-alignment

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+Size and alignment requirements of stack values
+===============================================
+
+P  ... System.IntPtr
+I1 ... System.Int8
+I2 ... System.Int16
+I4 ... System.Int32
+I8 ... System.Int64
+F  ... System.Single
+D  ... System.Double
+LD ... native long double
+
+-----------------------------------------------------------
+ARCH      |   P |  I1 |  I2 |  I4 |  I8 |  F  |   D |  LD | 
+-----------------------------------------------------------
+X86       | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
+-----------------------------------------------------------
+X86/W32   | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
+-----------------------------------------------------------
+ARM       | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 | 8/4 |
+-----------------------------------------------------------
+M68K      | 4/4 | 4/4 | 4/4 | 4/4 | 8/4 | 4/4 | 8/4 |12/4 |
+-----------------------------------------------------------
+ALPHA     | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 |
+-----------------------------------------------------------
+SPARC     | 4/4 | 4/4 | 4/4 | 4/4 | 8/8 | 4/4 | 8/8 |16/8 |
+-----------------------------------------------------------
+SPARC64   | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 |16/16|
+-----------------------------------------------------------
+MIPS      | 4/4 | 4/4 | 4/4 | 4/4 | ?/? | 4/4 | 8/8 | 8/8 |
+-----------------------------------------------------------
+          |     |     |     |     |     |     |     |     |
+-----------------------------------------------------------