sysdeps/x86_64/soft-fp/sfp-machine.h

   1 #define _FP_W_TYPE_SIZE         64
   2 #define _FP_W_TYPE              unsigned long
   3 #define _FP_WS_TYPE             signed long
   4 #define _FP_I_TYPE              long
   5
   6 #define __FP_CLZ(r, x)                                                  \
   7   do {                                                                  \
   8     __asm__("bsrq %1,%0" : "=r"(r) : "g"(x) : "cc");                    \
   9     r ^= 63;                                                            \
  10   } while (0)
  11
  12 #define _FP_NANFRAC_S           _FP_QNANBIT_S
  13 #define _FP_NANFRAC_D           _FP_QNANBIT_D, 0
  14 #define _FP_NANFRAC_Q           _FP_QNANBIT_Q, 0, 0, 0
  15 #define _FP_NANSIGN_S           1
  16 #define _FP_NANSIGN_D           1
  17 #define _FP_NANSIGN_Q           1
  18
  19 #define _FP_KEEPNANFRACP 1
  20 /* Here is something Intel misdesigned: the specs don't define
  21    the case where we have two NaNs with same mantissas, but
  22    different sign. Different operations pick up different NaNs.
  23  */
  24 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  25   do {                                                          \
  26     if (_FP_FRAC_GT_##wc(X, Y)                                  \
  27         || (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
  28       {                                                         \
  29         R##_s = X##_s;                                          \
  30         _FP_FRAC_COPY_##wc(R,X);                                \
  31       }                                                         \
  32     else                                                        \
  33       {                                                         \
  34         R##_s = Y##_s;                                          \
  35         _FP_FRAC_COPY_##wc(R,Y);                                \
  36       }                                                         \
  37     R##_c = FP_CLS_NAN;                                         \
  38   } while (0)
  39
  40 #define FP_EX_INVALID           (1 << 0)
  41 #define FP_EX_DENORM            (1 << 1)
  42 #define FP_EX_DIVZERO           (1 << 2)
  43 #define FP_EX_OVERFLOW          (1 << 3)
  44 #define FP_EX_UNDERFLOW         (1 << 4)
  45 #define FP_EX_INEXACT           (1 << 5)
  46
  47 #define FP_RND_NEAREST          0
  48 #define FP_RND_ZERO             3
  49 #define FP_RND_PINF             2
  50 #define FP_RND_MINF             1
  51