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longlong.h

/* longlong.h -- based on code from gcc-2.95.3

   definitions for mixed size 32/64 bit arithmetic.
   Copyright (C) 1991, 92, 94, 95, 96, 1997, 1998 Free Software Foundation, Inc.

   This definition file is free software; you can redistribute it
   and/or modify it under the terms of the GNU General Public
   License as published by the Free Software Foundation; either
   version 2, or (at your option) any later version.

   This definition file is distributed in the hope that it will be
   useful, but WITHOUT ANY WARRANTY; without even the implied
   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   See the GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* Borrowed from GCC 2.95.3, I Molton 29/07/01 */

#ifndef SI_TYPE_SIZE
#define SI_TYPE_SIZE 32
#endif

#define __BITS4 (SI_TYPE_SIZE / 4)
#define __ll_B (1L << (SI_TYPE_SIZE / 2))
#define __ll_lowpart(t) ((USItype) (t) % __ll_B)
#define __ll_highpart(t) ((USItype) (t) / __ll_B)

/* Define auxiliary asm macros.

   1) umul_ppmm(high_prod, low_prod, multipler, multiplicand)
   multiplies two USItype integers MULTIPLER and MULTIPLICAND,
   and generates a two-part USItype product in HIGH_PROD and
   LOW_PROD.

   2) __umulsidi3(a,b) multiplies two USItype integers A and B,
   and returns a UDItype product.  This is just a variant of umul_ppmm.

   3) udiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
   denominator) divides a two-word unsigned integer, composed by the
   integers HIGH_NUMERATOR and LOW_NUMERATOR, by DENOMINATOR and
   places the quotient in QUOTIENT and the remainder in REMAINDER.
   HIGH_NUMERATOR must be less than DENOMINATOR for correct operation.
   If, in addition, the most significant bit of DENOMINATOR must be 1,
   then the pre-processor symbol UDIV_NEEDS_NORMALIZATION is defined to 1.

   4) sdiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
   denominator).  Like udiv_qrnnd but the numbers are signed.  The
   quotient is rounded towards 0.

   5) count_leading_zeros(count, x) counts the number of zero-bits from
   the msb to the first non-zero bit.  This is the number of steps X
   needs to be shifted left to set the msb.  Undefined for X == 0.

   6) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
   high_addend_2, low_addend_2) adds two two-word unsigned integers,
   composed by HIGH_ADDEND_1 and LOW_ADDEND_1, and HIGH_ADDEND_2 and
   LOW_ADDEND_2 respectively.  The result is placed in HIGH_SUM and
   LOW_SUM.  Overflow (i.e. carry out) is not stored anywhere, and is
   lost.

   7) sub_ddmmss(high_difference, low_difference, high_minuend,
   low_minuend, high_subtrahend, low_subtrahend) subtracts two
   two-word unsigned integers, composed by HIGH_MINUEND_1 and
   LOW_MINUEND_1, and HIGH_SUBTRAHEND_2 and LOW_SUBTRAHEND_2
   respectively.  The result is placed in HIGH_DIFFERENCE and
   LOW_DIFFERENCE.  Overflow (i.e. carry out) is not stored anywhere,
   and is lost.

   If any of these macros are left undefined for a particular CPU,
   C macros are used.  */

#if defined (__arm__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("adds  %1, %4, %5                          \n\
      adc   %0, %2, %3"                               \
         : "=r" ((USItype) (sh)),                           \
           "=&r" ((USItype) (sl))                           \
         : "%r" ((USItype) (ah)),                           \
           "rI" ((USItype) (bh)),                           \
           "%r" ((USItype) (al)),                           \
           "rI" ((USItype) (bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("subs  %1, %4, %5                          \n\
      sbc   %0, %2, %3"                               \
         : "=r" ((USItype) (sh)),                           \
           "=&r" ((USItype) (sl))                           \
         : "r" ((USItype) (ah)),                            \
           "rI" ((USItype) (bh)),                           \
           "r" ((USItype) (al)),                            \
           "rI" ((USItype) (bl)))
#define umul_ppmm(xh, xl, a, b) \
{register USItype __t0, __t1, __t2;                         \
  __asm__ ("%@ Inlined umul_ppmm                            \n\
      mov   %2, %5, lsr #16                                 \n\
      mov   %0, %6, lsr #16                                 \n\
      bic   %3, %5, %2, lsl #16                             \n\
      bic   %4, %6, %0, lsl #16                             \n\
      mul   %1, %3, %4                                \n\
      mul   %4, %2, %4                                \n\
      mul   %3, %0, %3                                \n\
      mul   %0, %2, %0                                \n\
      adds  %3, %4, %3                                \n\
      addcs %0, %0, #65536                                  \n\
      adds  %1, %1, %3, lsl #16                             \n\
      adc   %0, %0, %3, lsr #16"                            \
         : "=&r" ((USItype) (xh)),                          \
           "=r" ((USItype) (xl)),                           \
           "=&r" (__t0), "=&r" (__t1), "=r" (__t2)                \
         : "r" ((USItype) (a)),                             \
           "r" ((USItype) (b)));}
#define UMUL_TIME 20
#define UDIV_TIME 100
#endif /* __arm__ */

#define __umulsidi3(u, v) \
  ({DIunion __w;                                      \
    umul_ppmm (__w.s.high, __w.s.low, u, v);                      \
    __w.ll; })

#define __udiv_qrnnd_c(q, r, n1, n0, d) \
  do {                                                      \
    USItype __d1, __d0, __q1, __q0;                         \
    USItype __r1, __r0, __m;                                \
    __d1 = __ll_highpart (d);                               \
    __d0 = __ll_lowpart (d);                                \
                                                      \
    __r1 = (n1) % __d1;                                     \
    __q1 = (n1) / __d1;                                     \
    __m = (USItype) __q1 * __d0;                            \
    __r1 = __r1 * __ll_B | __ll_highpart (n0);                    \
    if (__r1 < __m)                                         \
      {                                                     \
      __q1--, __r1 += (d);                                  \
      if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
        if (__r1 < __m)                               \
          __q1--, __r1 += (d);                              \
      }                                                     \
    __r1 -= __m;                                      \
                                                      \
    __r0 = __r1 % __d1;                                     \
    __q0 = __r1 / __d1;                                     \
    __m = (USItype) __q0 * __d0;                            \
    __r0 = __r0 * __ll_B | __ll_lowpart (n0);                     \
    if (__r0 < __m)                                         \
      {                                                     \
      __q0--, __r0 += (d);                                  \
      if (__r0 >= (d))                                \
        if (__r0 < __m)                               \
          __q0--, __r0 += (d);                              \
      }                                                     \
    __r0 -= __m;                                      \
                                                      \
    (q) = (USItype) __q1 * __ll_B | __q0;                   \
    (r) = __r0;                                             \
  } while (0)

#define UDIV_NEEDS_NORMALIZATION 1
#define udiv_qrnnd __udiv_qrnnd_c

extern const UQItype __clz_tab[];
#define count_leading_zeros(count, x) \
  do {                                                      \
    USItype __xr = (x);                                     \
    USItype __a;                                      \
                                                      \
    if (SI_TYPE_SIZE <= 32)                                 \
      {                                                     \
      __a = __xr < ((USItype)1<<2*__BITS4)                        \
        ? (__xr < ((USItype)1<<__BITS4) ? 0 : __BITS4)            \
        : (__xr < ((USItype)1<<3*__BITS4) ?  2*__BITS4 : 3*__BITS4);    \
      }                                                     \
    else                                              \
      {                                                     \
      for (__a = SI_TYPE_SIZE - 8; __a > 0; __a -= 8)             \
        if (((__xr >> __a) & 0xff) != 0)                    \
          break;                                      \
      }                                                     \
                                                      \
    (count) = SI_TYPE_SIZE - (__clz_tab[__xr >> __a] + __a);            \
  } while (0)

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