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/* -----------------------------------------------------------------------------
*
* (c) The University of Glasgow 2002
*
* Definitions that characterise machine specific properties of basic
* types (C & Haskell) of a target platform.
*
* 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://ghc.haskell.org/trac/ghc/wiki/Commentary/SourceTree/Includes
*
* ---------------------------------------------------------------------------*/
#pragma once
/* Don't allow stage1 (cross-)compiler embed assumptions about target
* platform. When ghc-stage1 is being built by ghc-stage0 is should not
* refer to target defines. A few past examples:
* - https://ghc.haskell.org/trac/ghc/ticket/13491
* - https://phabricator.haskell.org/D3122
* - https://phabricator.haskell.org/D3405
*
* In those cases code change assumed target defines like SIZEOF_HSINT
* are applied to host platform, not target platform.
*
* So what should be used instead in STAGE=1?
*
* To get host's equivalent of SIZEOF_HSINT you can use Bits instances:
* Data.Bits.finiteBitSize (0 :: Int)
*
* To get target's values it is preferred to use runtime target
* configuration from 'targetPlatform :: DynFlags -> Platform'
* record. A few wrappers are already defined and used throughout GHC:
* wORD_SIZE :: DynFlags -> Int
* wORD_SIZE dflags = pc_WORD_SIZE (sPlatformConstants (settings dflags))
*
* Hence we hide these macros from -DSTAGE=1
*/
#if !defined(STAGE) || STAGE >= 2
/* 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.
*/
#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_INT8_T
#define ALIGNMENT_INT8 ALIGNMENT_INT8_T
#define SIZEOF_WORD8 SIZEOF_UINT8_T
#define ALIGNMENT_WORD8 ALIGNMENT_UINT8_T
#define SIZEOF_INT16 SIZEOF_INT16_T
#define ALIGNMENT_INT16 ALIGNMENT_INT16_T
#define SIZEOF_WORD16 SIZEOF_UINT16_T
#define ALIGNMENT_WORD16 ALIGNMENT_UINT16_T
#define SIZEOF_INT32 SIZEOF_INT32_T
#define ALIGNMENT_INT32 ALIGNMENT_INT32_T
#define SIZEOF_WORD32 SIZEOF_UINT32_T
#define ALIGNMENT_WORD32 ALIGNMENT_UINT32_T
#define SIZEOF_INT64 SIZEOF_INT64_T
#define ALIGNMENT_INT64 ALIGNMENT_INT64_T
#define SIZEOF_WORD64 SIZEOF_UINT64_T
#define ALIGNMENT_WORD64 ALIGNMENT_UINT64_T
#if !defined(WORD_SIZE_IN_BITS)
#if SIZEOF_HSWORD == 4
#define WORD_SIZE_IN_BITS 32
#define WORD_SIZE_IN_BITS_FLOAT 32.0
#else
#define WORD_SIZE_IN_BITS 64
#define WORD_SIZE_IN_BITS_FLOAT 64.0
#endif
#endif
#if !defined(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 /* !defined(STAGE) || STAGE >= 2 */
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