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Viewing changes to libatomic_ops-1.2/src/atomic_ops/sysdeps/standard_ao_double_t.h

  • Committer: Bazaar Package Importer
  • Author(s): Christoph Egger
  • Date: 2011-02-19 12:19:56 UTC
  • mfrom: (1.3.2 upstream) (0.1.5 experimental)
  • mto: This revision was merged to the branch mainline in revision 14.
  • Revision ID: james.westby@ubuntu.com-20110219121956-67rb69xlt5nud3v2
Tags: 1:7.1-5
Upload to unstable

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libatomic_ops-1.2/src/atomic_ops/sysdeps/standard_ao_double_t.h
 
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/* NEC LE-IT: For 64Bit OS we extend the double type to hold two int64's
 
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*       
 
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*  x86-64: __m128 serves as placeholder which also requires the compiler
 
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*          to align     it on 16 byte boundary (as required by cmpxchg16.
 
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* Similar things could be done for PowerPC 64bit using a VMX data type...       */
 
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#if defined(__GNUC__)
 
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# if defined(__x86_64__)
 
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# include<xmmintrin.h>
 
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   typedef __m128 double_ptr_storage;
 
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#  define AO_HAVE_DOUBLE_PTR_STORAGE
 
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# endif /* __x86_64__ */
 
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#endif
 
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#ifdef _MSC_VER
 
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# ifdef _WIN64
 
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   typedef __m128 double_ptr_storage;
 
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#  define AO_HAVE_DOUBLE_PTR_STORAGE
 
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# elif _WIN32
 
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   typedef unsigned __int64 double_ptr_storage;
 
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#  define AO_HAVE_DOUBLE_PTR_STORAGE
 
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# endif
 
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#endif
 
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#ifndef AO_HAVE_DOUBLE_PTR_STORAGE
 
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   typedef unsigned long long double_ptr_storage;
 
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#endif
 
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typedef union {
 
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    double_ptr_storage AO_whole;
 
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    struct {AO_t AO_v1; AO_t AO_v2;} AO_parts;
 
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} AO_double_t;
 
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#define AO_HAVE_double_t
 
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#define AO_val1 AO_parts.AO_v1
 
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#define AO_val2 AO_parts.AO_v2