src/gallium/auxiliary/util/u_sse.h

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   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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  27
  28 /**
  29  * @file
  30  * SSE intrinsics portability header.
  31  *
  32  * Although the SSE intrinsics are support by all modern x86 and x86-64
  33  * compilers, there are some intrisincs missing in some implementations
  34  * (especially older MSVC versions). This header abstracts that away.
  35  */
  36
  37 #ifndef U_SSE_H_
  38 #define U_SSE_H_
  39
  40 #include <xmmintrin.h>
  41 #include <emmintrin.h>
  42
  43
  44 /* MSVC before VC8 does not support the _mm_castxxx_yyy */
  45 #if defined(_MSC_VER) && _MSC_VER < 1500
  46
  47 union __declspec(align(16)) m128_types {
  48    __m128 m128;
  49    __m128i m128i;
  50    __m128d m128d;
  51 };
  52
  53 static __inline __m128
  54 _mm_castsi128_ps(__m128i a)
  55 {
  56    union m128_types u;
  57    u.m128i = a;
  58    return u.m128;
  59 }
  60
  61 static __inline __m128i
  62 _mm_castps_si128(__m128 a)
  63 {
  64    union m128_types u;
  65    u.m128 = a;
  66    return u.m128i;
  67 }
  68
  69 #endif
  70
  71
  72 #endif /* U_SSE_H_ */