c_cpp/faststater/gtypendef.h

   1 #ifndef _G_TYPEnDEF_H
   2 #define _G_TYPEnDEF_H
   3
   4 #ifndef _G_UINT128_T
   5 #define _G_UINT128_T
   6 //typedef unsigned __int128 uint128_t __attribute__((mode(TI)));
   7 typedef unsigned int uint128_t __attribute__((mode(TI)));
   8 #endif
   9
  10 #ifndef _G_FLOAT128_T
  11 #define _G_FLOAT128_T
  12 typedef __float128 float128 __attribute__((mode(TF)));
  13 #endif
  14
  15 #if defined(_MSC_VER)
  16 #define FORCE_INLINE    __forceinline
  17 #else   // defined(_MSC_VER)
  18 #define FORCE_INLINE static inline __attribute__((always_inline))
  19 #endif // !defined(_MSC_VER)
  20
  21
  22
  23
  24 /*
  25 http://stackoverflow.com/questions/1188939/representing-128-bit-numbers-in-c
  26 typedef unsigned int uint128_t __attribute__((mode(TI)));
  27
  28 http://gcc.gnu.org/gcc-4.4/changes.html
  29 IA-32/IA64:
  30 Support for __float128 (TFmode) IEEE quad type and corresponding TCmode IEEE complex quad type is available via the soft-fp library on IA-32/IA64 targets. This includes basic arithmetic operations (addition, subtraction, negation, multiplication and division) on __float128 real and TCmode complex values, the full set of IEEE comparisons between __float128 values, conversions to and from float, double and long double floating point types, as well as conversions to and from signed or unsigned integer, signed or unsigned long integer and signed or unsigned quad (TImode, IA64 only) integer types. Additionally, all operations generate the full set of IEEE exceptions and support the full set of IEEE rounding modes.
  31 MIPS:
  32     asm ("dmultu\t%1,%2" : "=h" (result) : "r" (x), "r" (y));
  33 You can now achieve the same effect using 128-bit types:
  34     typedef unsigned int uint128_t __attribute__((mode(TI)));
  35     result = ((uint128_t) x * y) >> 64;
  36
  37 http://gcc.gnu.org/gcc-4.3/changes.html
  38 IA-32/x86-64:
  39 Support for __float128 (TFmode) IEEE quad type and corresponding TCmode IEEE complex quad type is available via the soft-fp library on x86_64 targets. This includes basic arithmetic operations (addition, subtraction, negation, multiplication and division) on __float128 real and TCmode complex values, the full set of IEEE comparisons between __float128 values, conversions to and from float, double and long double floating point types, as well as conversions to and from signed or unsigned integer, signed or unsigned long integer and signed or unsigned quad (TImode) integer types. Additionally, all operations generate the full set of IEEE exceptions and support the full set of IEEE rounding modes.
  40
  41 http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00354.html
  42 [patch]: Add support of new __int128 type for targets having 128-bit integer scalar support
  43 http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00354/int128doc.diff
  44 +  static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL", "I128", "UI128" };
  45
  46 http://en.wikipedia.org/wiki/Floating_point
  47 Type    Sign    Exponent        Significand     Total bits              Exponent bias   Bits precision
  48 Single  1       8               23              32                      127             24
  49 Double  1       11              52              64                      1023            53
  50 Quad    1       15              112             128                     16383           113
  51 */
  52 #endif  // gtypendef.h
  53