linux/arch/sh/math-emu/sfp-util.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * These are copied from glibc/stdlib/longlong.h
   4 */
   5
   6#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
   7  do {                                                                  \
   8    UWtype __x;                                                         \
   9    __x = (al) + (bl);                                                  \
  10    (sh) = (ah) + (bh) + (__x < (al));                                  \
  11    (sl) = __x;                                                         \
  12  } while (0)
  13
  14#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  15  do {                                                                  \
  16    UWtype __x;                                                         \
  17    __x = (al) - (bl);                                                  \
  18    (sh) = (ah) - (bh) - (__x > (al));                                  \
  19    (sl) = __x;                                                         \
  20  } while (0)
  21
  22#define umul_ppmm(w1, w0, u, v) \
  23  __asm__ ("dmulu.l %2,%3\n\tsts    macl,%1\n\tsts  mach,%0"    \
  24        : "=r" ((u32)(w1)), "=r" ((u32)(w0))    \
  25        :  "r" ((u32)(u)),   "r" ((u32)(v))     \
  26        : "macl", "mach")
  27
  28#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
  29#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
  30#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
  31
  32#define udiv_qrnnd(q, r, n1, n0, d) \
  33  do {                                                                  \
  34    UWtype __d1, __d0, __q1, __q0;                                      \
  35    UWtype __r1, __r0, __m;                                             \
  36    __d1 = __ll_highpart (d);                                           \
  37    __d0 = __ll_lowpart (d);                                            \
  38                                                                        \
  39    __r1 = (n1) % __d1;                                                 \
  40    __q1 = (n1) / __d1;                                                 \
  41    __m = (UWtype) __q1 * __d0;                                         \
  42    __r1 = __r1 * __ll_B | __ll_highpart (n0);                          \
  43    if (__r1 < __m)                                                     \
  44      {                                                                 \
  45        __q1--, __r1 += (d);                                            \
  46        if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
  47          if (__r1 < __m)                                               \
  48            __q1--, __r1 += (d);                                        \
  49      }                                                                 \
  50    __r1 -= __m;                                                        \
  51                                                                        \
  52    __r0 = __r1 % __d1;                                                 \
  53    __q0 = __r1 / __d1;                                                 \
  54    __m = (UWtype) __q0 * __d0;                                         \
  55    __r0 = __r0 * __ll_B | __ll_lowpart (n0);                           \
  56    if (__r0 < __m)                                                     \
  57      {                                                                 \
  58        __q0--, __r0 += (d);                                            \
  59        if (__r0 >= (d))                                                \
  60          if (__r0 < __m)                                               \
  61            __q0--, __r0 += (d);                                        \
  62      }                                                                 \
  63    __r0 -= __m;                                                        \
  64                                                                        \
  65    (q) = (UWtype) __q1 * __ll_B | __q0;                                \
  66    (r) = __r0;                                                         \
  67  } while (0)
  68
  69#define abort() return 0
  70
  71#define __BYTE_ORDER __LITTLE_ENDIAN
  72
  73
  74