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/* -----------------------------------------------------------------------------
*
* (c) The University of Glasgow 2002
*
* Definitions that characterise machine specific properties of basic
* types (C & Haskell).
*
* NB: Keep in sync with HsFFI.h and StgTypes.h.
* NB: THIS FILE IS INCLUDED IN HASKELL SOURCE!
*
* To understand the structure of the RTS headers, see the wiki:
* http://hackage.haskell.org/trac/ghc/wiki/Commentary/SourceTree/Includes
*
* ---------------------------------------------------------------------------*/
#ifndef MACHDEPS_H
#define MACHDEPS_H
/* Sizes of C types come from here... */
#include "ghcautoconf.h"
/* Sizes of Haskell types follow. These sizes correspond to:
* - the number of bytes in the primitive type (eg. Int#)
* - the number of bytes in the external representation (eg. HsInt)
* - the scale offset used by writeFooOffAddr#
*
* In the heap, the type may take up more space: eg. SIZEOF_INT8 == 1,
* but it takes up SIZEOF_HSWORD (4 or 8) bytes in the heap.
*/
/* First, check some assumptions.. */
#if SIZEOF_CHAR != 1
#error GHC untested on this architecture: sizeof(char) != 1
#endif
#if SIZEOF_SHORT != 2
#error GHC untested on this architecture: sizeof(short) != 2
#endif
#if SIZEOF_UNSIGNED_INT != 4
#error GHC untested on this architecture: sizeof(unsigned int) != 4
#endif
#define SIZEOF_HSCHAR SIZEOF_WORD32
#define ALIGNMENT_HSCHAR ALIGNMENT_WORD32
#define SIZEOF_HSINT SIZEOF_VOID_P
#define ALIGNMENT_HSINT ALIGNMENT_VOID_P
#define SIZEOF_HSWORD SIZEOF_VOID_P
#define ALIGNMENT_HSWORD ALIGNMENT_VOID_P
#define SIZEOF_HSDOUBLE SIZEOF_DOUBLE
#define ALIGNMENT_HSDOUBLE ALIGNMENT_DOUBLE
#define SIZEOF_HSFLOAT SIZEOF_FLOAT
#define ALIGNMENT_HSFLOAT ALIGNMENT_FLOAT
#define SIZEOF_HSPTR SIZEOF_VOID_P
#define ALIGNMENT_HSPTR ALIGNMENT_VOID_P
#define SIZEOF_HSFUNPTR SIZEOF_VOID_P
#define ALIGNMENT_HSFUNPTR ALIGNMENT_VOID_P
#define SIZEOF_HSSTABLEPTR SIZEOF_VOID_P
#define ALIGNMENT_HSSTABLEPTR ALIGNMENT_VOID_P
#define SIZEOF_INT8 SIZEOF_CHAR
#define ALIGNMENT_INT8 ALIGNMENT_CHAR
#define SIZEOF_WORD8 SIZEOF_UNSIGNED_CHAR
#define ALIGNMENT_WORD8 ALIGNMENT_UNSIGNED_CHAR
#define SIZEOF_INT16 SIZEOF_SHORT
#define ALIGNMENT_INT16 ALIGNMENT_SHORT
#define SIZEOF_WORD16 SIZEOF_UNSIGNED_SHORT
#define ALIGNMENT_WORD16 ALIGNMENT_UNSIGNED_SHORT
#define SIZEOF_INT32 SIZEOF_INT
#define ALIGNMENT_INT32 ALIGNMENT_INT
#define SIZEOF_WORD32 SIZEOF_UNSIGNED_INT
#define ALIGNMENT_WORD32 ALIGNMENT_UNSIGNED_INT
#if HAVE_LONG_LONG && SIZEOF_VOID_P < 8
/* assume long long is 64 bits */
#define SIZEOF_INT64 SIZEOF_LONG_LONG
#define ALIGNMENT_INT64 ALIGNMENT_LONG_LONG
#define SIZEOF_WORD64 SIZEOF_UNSIGNED_LONG_LONG
#define ALIGNMENT_WORD64 ALIGNMENT_UNSIGNED_LONG_LONG
#elif SIZEOF_LONG == 8
#define SIZEOF_INT64 SIZEOF_LONG
#define ALIGNMENT_INT64 ALIGNMENT_LONG
#define SIZEOF_WORD64 SIZEOF_UNSIGNED_LONG
#define ALIGNMENT_WORD64 ALIGNMENT_UNSIGNED_LONG
#else
#error GHC untested on this architecture: sizeof(void *) < 8 and no long longs.
#endif
#ifndef WORD_SIZE_IN_BITS
#if SIZEOF_HSWORD == 4
#define WORD_SIZE_IN_BITS 32
#else
#define WORD_SIZE_IN_BITS 64
#endif
#endif
#ifndef TAG_BITS
#if SIZEOF_HSWORD == 4
#define TAG_BITS 2
#else
#define TAG_BITS 3
#endif
#endif
#define TAG_MASK ((1 << TAG_BITS) - 1)
#endif /* MACHDEPS_H */
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