git.oblomov.eu Git - linux-2.6/blob - arch/sh/math-emu/sfp-util.h

   1 /*
   2  * These are copied from glibc/stdlib/longlong.h
   3  */
   4
   5 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
   6   do {                                                                  \
   7     UWtype __x;                                                         \
   8     __x = (al) + (bl);                                                  \
   9     (sh) = (ah) + (bh) + (__x < (al));                                  \
  10     (sl) = __x;                                                         \
  11   } while (0)
  12
  13 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  14   do {                                                                  \
  15     UWtype __x;                                                         \
  16     __x = (al) - (bl);                                                  \
  17     (sh) = (ah) - (bh) - (__x > (al));                                  \
  18     (sl) = __x;                                                         \
  19   } while (0)
  20
  21 #define umul_ppmm(w1, w0, u, v) \
  22   __asm__ ("dmulu.l %2,%3\n\tsts    macl,%1\n\tsts  mach,%0"    \
  23         : "=r" ((u32)(w1)), "=r" ((u32)(w0))    \
  24         :  "r" ((u32)(u)),   "r" ((u32)(v))     \
  25         : "macl", "mach")
  26
  27 #define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
  28 #define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
  29 #define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
  30
  31 #define udiv_qrnnd(q, r, n1, n0, d) \
  32   do {                                                                  \
  33     UWtype __d1, __d0, __q1, __q0;                                      \
  34     UWtype __r1, __r0, __m;                                             \
  35     __d1 = __ll_highpart (d);                                           \
  36     __d0 = __ll_lowpart (d);                                            \
  37                                                                         \
  38     __r1 = (n1) % __d1;                                                 \
  39     __q1 = (n1) / __d1;                                                 \
  40     __m = (UWtype) __q1 * __d0;                                         \
  41     __r1 = __r1 * __ll_B | __ll_highpart (n0);                          \
  42     if (__r1 < __m)                                                     \
  43       {                                                                 \
  44         __q1--, __r1 += (d);                                            \
  45         if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
  46           if (__r1 < __m)                                               \
  47             __q1--, __r1 += (d);                                        \
  48       }                                                                 \
  49     __r1 -= __m;                                                        \
  50                                                                         \
  51     __r0 = __r1 % __d1;                                                 \
  52     __q0 = __r1 / __d1;                                                 \
  53     __m = (UWtype) __q0 * __d0;                                         \
  54     __r0 = __r0 * __ll_B | __ll_lowpart (n0);                           \
  55     if (__r0 < __m)                                                     \
  56       {                                                                 \
  57         __q0--, __r0 += (d);                                            \
  58         if (__r0 >= (d))                                                \
  59           if (__r0 < __m)                                               \
  60             __q0--, __r0 += (d);                                        \
  61       }                                                                 \
  62     __r0 -= __m;                                                        \
  63                                                                         \
  64     (q) = (UWtype) __q1 * __ll_B | __q0;                                \
  65     (r) = __r0;                                                         \
  66   } while (0)
  67
  68 #define abort() return 0
  69
  70 #define __BYTE_ORDER __LITTLE_ENDIAN
  71
  72