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- /* More subroutines needed by GCC output code on some machines. */
- /* Compile this one with gcc. */
-
- #include "config.h"
- #include <stddef.h>
-
- #ifndef SItype
- #define SItype long int
- #endif
-
- /* long long ints are pairs of long ints in the order determined by
- WORDS_BIG_ENDIAN. */
-
- #ifdef WORDS_BIG_ENDIAN
- struct longlong {long high, low;};
- #else
- struct longlong {long low, high;};
- #endif
-
- /* We need this union to unpack/pack longlongs, since we don't have
- any arithmetic yet. Incoming long long parameters are stored
- into the `ll' field, and the unpacked result is read from the struct
- longlong. */
-
- typedef union
- {
- struct longlong s;
- long long ll;
- SItype i[2];
- unsigned SItype ui[2];
- } long_long;
-
- /* Internally, long long ints are strings of unsigned shorts in the
- order determined by BYTES_BIG_ENDIAN. */
-
- #define B 0x10000
- #define low16 (B - 1)
-
- #ifdef BYTES_BIG_ENDIAN
-
- /* Note that HIGH and LOW do not describe the order
- of words in a long long. They describe the order of words
- in vectors ordered according to the byte order. */
-
- #define HIGH 0
- #define LOW 1
-
- #define big_end(n) 0
- #define little_end(n) ((n) - 1)
- #define next_msd(i) ((i) - 1)
- #define next_lsd(i) ((i) + 1)
- #define is_not_msd(i,n) ((i) >= 0)
- #define is_not_lsd(i,n) ((i) < (n))
-
- #else
-
- #define LOW 0
- #define HIGH 1
-
- #define big_end(n) ((n) - 1)
- #define little_end(n) 0
- #define next_msd(i) ((i) + 1)
- #define next_lsd(i) ((i) - 1)
- #define is_not_msd(i,n) ((i) < (n))
- #define is_not_lsd(i,n) ((i) >= 0)
-
- #endif
-
- /* These algorithms are all straight out of Knuth, vol. 2, sec. 4.3.1. */
-
- static int badd ();
- static int bsub ();
- static void bmul ();
- static int bneg ();
- static int bshift ();
-
- #ifdef L_adddi3
- long long
- __adddi3 (u, v)
- long long u, v;
- {
- long a[2], b[2], c[2];
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- a[HIGH] = uu.s.high;
- a[LOW] = uu.s.low;
- b[HIGH] = vv.s.high;
- b[LOW] = vv.s.low;
-
- badd (a, b, c, sizeof c);
-
- w.s.high = c[HIGH];
- w.s.low = c[LOW];
- return w.ll;
- }
-
- static int
- badd (a, b, c, n)
- unsigned short *a, *b, *c;
- size_t n;
- {
- unsigned long acc;
- int i;
-
- n /= sizeof *c;
-
- acc = 0;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- /* Widen before adding to avoid loss of high bits. */
- acc += (unsigned long) a[i] + b[i];
- c[i] = acc & low16;
- acc = acc >> 16;
- }
- return acc;
- }
- #endif
-
- #ifdef L_anddi3
- long long
- __anddi3 (u, v)
- long long u, v;
- {
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- w.s.high = uu.s.high & vv.s.high;
- w.s.low = uu.s.low & vv.s.low;
-
- return w.ll;
- }
- #endif
-
- #ifdef L_iordi3
- long long
- __iordi3 (u, v)
- long long u, v;
- {
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- w.s.high = uu.s.high | vv.s.high;
- w.s.low = uu.s.low | vv.s.low;
-
- return w.ll;
- }
- #endif
-
- #ifdef L_xordi3
- long long
- __xordi3 (u, v)
- long long u, v;
- {
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- w.s.high = uu.s.high ^ vv.s.high;
- w.s.low = uu.s.low ^ vv.s.low;
-
- return w.ll;
- }
- #endif
-
- #ifdef L_one_cmpldi2
- long long
- __one_cmpldi2 (u)
- long long u;
- {
- long_long w;
- long_long uu;
-
- uu.ll = u;
-
- w.s.high = ~uu.s.high;
- w.s.low = ~uu.s.low;
-
- return w.ll;
- }
- #endif
-
- #ifdef L_lshldi3
- long long
- __lshldi3 (u, b)
- long long u;
- long int b;
- {
- long_long w;
- unsigned long carries;
- int bm;
- long_long uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof (int) * BITS_PER_UNIT) - b;
- if (bm <= 0)
- {
- w.s.low = 0;
- w.s.high = (unsigned long)uu.s.low << -bm;
- }
- else
- {
- carries = (unsigned long)uu.s.low >> bm;
- w.s.low = (unsigned long)uu.s.low << b;
- w.s.high = ((unsigned long)uu.s.high << b) | carries;
- }
-
- return w.ll;
- }
- #endif
-
- #ifdef L_lshrdi3
- long long
- __lshrdi3 (u, b)
- long long u;
- long int b;
- {
- long_long w;
- unsigned long carries;
- int bm;
- long_long uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof (int) * BITS_PER_UNIT) - b;
- if (bm <= 0)
- {
- w.s.high = 0;
- w.s.low = (unsigned long)uu.s.high >> -bm;
- }
- else
- {
- carries = (unsigned long)uu.s.high << bm;
- w.s.high = (unsigned long)uu.s.high >> b;
- w.s.low = ((unsigned long)uu.s.low >> b) | carries;
- }
-
- return w.ll;
- }
- #endif
-
- #ifdef L_ashldi3
- long long
- __ashldi3 (u, b)
- long long u;
- long int b;
- {
- long_long w;
- unsigned long carries;
- int bm;
- long_long uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof (int) * BITS_PER_UNIT) - b;
- if (bm <= 0)
- {
- w.s.low = 0;
- w.s.high = (unsigned long)uu.s.low << -bm;
- }
- else
- {
- carries = (unsigned long)uu.s.low >> bm;
- w.s.low = (unsigned long)uu.s.low << b;
- w.s.high = ((unsigned long)uu.s.high << b) | carries;
- }
-
- return w.ll;
- }
- #endif
-
- #ifdef L_ashrdi3
- long long
- __ashrdi3 (u, b)
- long long u;
- long int b;
- {
- long_long w;
- unsigned long carries;
- int bm;
- long_long uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof (int) * BITS_PER_UNIT) - b;
- if (bm <= 0)
- {
- w.s.high = uu.s.high >> 31; /* just to make w.s.high 1..1 or 0..0 */
- w.s.low = uu.s.high >> -bm;
- }
- else
- {
- carries = (unsigned long)uu.s.high << bm;
- w.s.high = uu.s.high >> b;
- w.s.low = ((unsigned long)uu.s.low >> b) | carries;
- }
-
- return w.ll;
- }
- #endif
-
- #ifdef L_subdi3
- long long
- __subdi3 (u, v)
- long long u, v;
- {
- long a[2], b[2], c[2];
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- a[HIGH] = uu.s.high;
- a[LOW] = uu.s.low;
- b[HIGH] = vv.s.high;
- b[LOW] = vv.s.low;
-
- bsub (a, b, c, sizeof c);
-
- w.s.high = c[HIGH];
- w.s.low = c[LOW];
- return w.ll;
- }
-
- static int
- bsub (a, b, c, n)
- unsigned short *a, *b, *c;
- size_t n;
- {
- signed long acc;
- int i;
-
- n /= sizeof *c;
-
- acc = 0;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- /* Widen before subtracting to avoid loss of high bits. */
- acc += (long) a[i] - b[i];
- c[i] = acc & low16;
- acc = acc >> 16;
- }
- return acc;
- }
- #endif
-
- #ifdef L_muldi3
- long long
- __muldi3 (u, v)
- long long u, v;
- {
- long a[2], b[2], c[2][2];
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- a[HIGH] = uu.s.high;
- a[LOW] = uu.s.low;
- b[HIGH] = vv.s.high;
- b[LOW] = vv.s.low;
-
- bmul (a, b, c, sizeof a, sizeof b);
-
- w.s.high = c[LOW][HIGH];
- w.s.low = c[LOW][LOW];
- return w.ll;
- }
-
- static void
- bmul (a, b, c, m, n)
- unsigned short *a, *b, *c;
- size_t m, n;
- {
- int i, j;
- unsigned long acc;
-
- bzero (c, m + n);
-
- m /= sizeof *a;
- n /= sizeof *b;
-
- for (j = little_end (n); is_not_msd (j, n); j = next_msd (j))
- {
- unsigned short *c1 = c + j + little_end (2);
- acc = 0;
- for (i = little_end (m); is_not_msd (i, m); i = next_msd (i))
- {
- /* Widen before arithmetic to avoid loss of high bits. */
- acc += (unsigned long) a[i] * b[j] + c1[i];
- c1[i] = acc & low16;
- acc = acc >> 16;
- }
- c1[i] = acc;
- }
- }
- #endif
-
- #ifdef L_divdi3
- long long
- __divdi3 (u, v)
- long long u, v;
- {
- if (u < 0)
- if (v < 0)
- return (unsigned long long) -u / (unsigned long long) -v;
- else
- return - ((unsigned long long) -u / (unsigned long long) v);
- else
- if (v < 0)
- return - ((unsigned long long) u / (unsigned long long) -v);
- else
- return (unsigned long long) u / (unsigned long long) v;
- }
- #endif
-
- #ifdef L_moddi3
- long long
- __moddi3 (u, v)
- long long u, v;
- {
- if (u < 0)
- if (v < 0)
- return - ((unsigned long long) -u % (unsigned long long) -v);
- else
- return - ((unsigned long long) -u % (unsigned long long) v);
- else
- if (v < 0)
- return (unsigned long long) u % (unsigned long long) -v;
- else
- return (unsigned long long) u % (unsigned long long) v;
- }
- #endif
-
- #ifdef L_udivdi3
- long long
- __udivdi3 (u, v)
- long long u, v;
- {
- unsigned long a[2][2], b[2], q[2], r[2];
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- a[HIGH][HIGH] = 0;
- a[HIGH][LOW] = 0;
- a[LOW][HIGH] = uu.s.high;
- a[LOW][LOW] = uu.s.low;
- b[HIGH] = vv.s.high;
- b[LOW] = vv.s.low;
-
- __bdiv (a, b, q, r, sizeof a, sizeof b);
-
- w.s.high = q[HIGH];
- w.s.low = q[LOW];
- return w.ll;
- }
- #endif
-
- #ifdef L_umoddi3
- long long
- __umoddi3 (u, v)
- long long u, v;
- {
- unsigned long a[2][2], b[2], q[2], r[2];
- long_long w;
- long_long uu, vv;
-
- uu.ll = u;
- vv.ll = v;
-
- a[HIGH][HIGH] = 0;
- a[HIGH][LOW] = 0;
- a[LOW][HIGH] = uu.s.high;
- a[LOW][LOW] = uu.s.low;
- b[HIGH] = vv.s.high;
- b[LOW] = vv.s.low;
-
- __bdiv (a, b, q, r, sizeof a, sizeof b);
-
- w.s.high = r[HIGH];
- w.s.low = r[LOW];
- return w.ll;
- }
- #endif
-
- #ifdef L_negdi2
- long long
- __negdi2 (u)
- long long u;
- {
- unsigned long a[2], b[2];
- long_long w;
- long_long uu;
-
- uu.ll = u;
-
- a[HIGH] = uu.s.high;
- a[LOW] = uu.s.low;
-
- bneg (a, b, sizeof b);
-
- w.s.high = b[HIGH];
- w.s.low = b[LOW];
- return w.ll;
- }
-
- static int
- bneg (a, b, n)
- unsigned short *a, *b;
- size_t n;
- {
- signed long acc;
- int i;
-
- n /= sizeof (short);
-
- acc = 0;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- acc -= a[i];
- b[i] = acc & low16;
- acc = acc >> 16;
- }
- return acc;
- }
- #endif
-
- /* Divide a by b, producing quotient q and remainder r.
-
- sizeof a is m
- sizeof b is n
- sizeof q is m - n
- sizeof r is n
-
- The quotient must fit in m - n bytes, i.e., the most significant
- n digits of a must be less than b, and m must be greater than n. */
-
- /* The name of this used to be __div_internal,
- but that is too long for SYSV. */
-
- #ifdef L_bdiv
- void
- __bdiv (a, b, q, r, m, n)
- unsigned short *a, *b, *q, *r;
- size_t m, n;
- {
- unsigned long qhat, rhat;
- unsigned long acc;
- unsigned short *u = (unsigned short *) alloca (m);
- unsigned short *v = (unsigned short *) alloca (n);
- unsigned short *u0, *u1, *u2;
- unsigned short *v0;
- int d, qn;
- int i, j;
-
- m /= sizeof *a;
- n /= sizeof *b;
- qn = m - n;
-
- /* Remove leading zero digits from divisor, and the same number of
- digits (which must be zero) from dividend. */
-
- while (b[big_end (n)] == 0)
- {
- r[big_end (n)] = 0;
-
- a += little_end (2);
- b += little_end (2);
- r += little_end (2);
- m--;
- n--;
-
- /* Check for zero divisor. */
- if (n == 0)
- abort ();
- }
-
- /* If divisor is a single digit, do short division. */
-
- if (n == 1)
- {
- acc = a[big_end (m)];
- a += little_end (2);
- for (j = big_end (qn); is_not_lsd (j, qn); j = next_lsd (j))
- {
- acc = (acc << 16) | a[j];
- q[j] = acc / *b;
- acc = acc % *b;
- }
- *r = acc;
- return;
- }
-
- /* No such luck, must do long division. Shift divisor and dividend
- left until the high bit of the divisor is 1. */
-
- for (d = 0; d < 16; d++)
- if (b[big_end (n)] & (1 << (16 - 1 - d)))
- break;
-
- bshift (a, d, u, 0, m);
- bshift (b, d, v, 0, n);
-
- /* Get pointers to the high dividend and divisor digits. */
-
- u0 = u + big_end (m) - big_end (qn);
- u1 = next_lsd (u0);
- u2 = next_lsd (u1);
- u += little_end (2);
-
- v0 = v + big_end (n);
-
- /* Main loop: find a quotient digit, multiply it by the divisor,
- and subtract that from the dividend, shifted over the right amount. */
-
- for (j = big_end (qn); is_not_lsd (j, qn); j = next_lsd (j))
- {
- /* Quotient digit initial guess: high 2 dividend digits over high
- divisor digit. */
-
- if (u0[j] == *v0)
- {
- qhat = B - 1;
- rhat = (unsigned long) *v0 + u1[j];
- }
- else
- {
- unsigned long numerator = ((unsigned long) u0[j] << 16) | u1[j];
- qhat = numerator / *v0;
- rhat = numerator % *v0;
- }
-
- /* Now get the quotient right for high 3 dividend digits over
- high 2 divisor digits. */
-
- while (rhat < B && qhat * *next_lsd (v0) > ((rhat << 16) | u2[j]))
- {
- qhat -= 1;
- rhat += *v0;
- }
-
- /* Multiply quotient by divisor, subtract from dividend. */
-
- acc = 0;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- acc += (unsigned long) (u + j)[i] - v[i] * qhat;
- (u + j)[i] = acc & low16;
- if (acc < B)
- acc = 0;
- else
- acc = (acc >> 16) | -B;
- }
-
- q[j] = qhat;
-
- /* Quotient may have been too high by 1. If dividend went negative,
- decrement the quotient by 1 and add the divisor back. */
-
- if ((signed long) (acc + u0[j]) < 0)
- {
- q[j] -= 1;
- acc = 0;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- acc += (unsigned long) (u + j)[i] + v[i];
- (u + j)[i] = acc & low16;
- acc = acc >> 16;
- }
- }
- }
-
- /* Now the remainder is what's left of the dividend, shifted right
- by the amount of the normalizing left shift at the top. */
-
- r[big_end (n)] = bshift (u + 1 + little_end (j - 1),
- 16 - d,
- r + little_end (2),
- u[little_end (m - 1)] >> d,
- n - 1);
- }
-
- /* Left shift U by K giving W; fill the introduced low-order bits with
- CARRY_IN. Length of U and W is N. Return carry out. K must be
- in 0 .. 16. */
-
- static int
- bshift (u, k, w, carry_in, n)
- unsigned short *u, *w, carry_in;
- int k, n;
- {
- unsigned long acc;
- int i;
-
- if (k == 0)
- {
- bcopy (u, w, n * sizeof *u);
- return 0;
- }
-
- acc = carry_in;
- for (i = little_end (n); is_not_msd (i, n); i = next_msd (i))
- {
- acc |= (unsigned long) u[i] << k;
- w[i] = acc & low16;
- acc = acc >> 16;
- }
- return acc;
- }
- #endif
-
- #ifdef L_cmpdi2
- SItype
- __cmpdi2 (a, b)
- long long a, b;
- {
- long_long au, bu;
-
- au.ll = a, bu.ll = b;
-
- if (au.s.high < bu.s.high)
- return 0;
- else if (au.s.high > bu.s.high)
- return 2;
- if ((unsigned) au.s.low < (unsigned) bu.s.low)
- return 0;
- else if ((unsigned) au.s.low > (unsigned) bu.s.low)
- return 2;
- return 1;
- }
- #endif
-
- #ifdef L_ucmpdi2
- SItype
- __ucmpdi2 (a, b)
- long long a, b;
- {
- long_long au, bu;
-
- au.ll = a, bu.ll = b;
-
- if ((unsigned) au.s.high < (unsigned) bu.s.high)
- return 0;
- else if ((unsigned) au.s.high > (unsigned) bu.s.high)
- return 2;
- if ((unsigned) au.s.low < (unsigned) bu.s.low)
- return 0;
- else if ((unsigned) au.s.low > (unsigned) bu.s.low)
- return 2;
- return 1;
- }
- #endif
-
- #ifdef L_fixunsdfdi
- #define HIGH_WORD_COEFF (((long long) 1) << BITS_PER_WORD)
-
- long long
- __fixunsdfdi (a)
- double a;
- {
- double b;
- unsigned long long v;
-
- if (a < 0)
- return 0;
-
- /* Compute high word of result, as a flonum. */
- b = (a / HIGH_WORD_COEFF);
- /* Convert that to fixed (but not to long long!),
- and shift it into the high word. */
- v = (unsigned long int) b;
- v <<= BITS_PER_WORD;
- /* Remove high part from the double, leaving the low part as flonum. */
- a -= (double)v;
- /* Convert that to fixed (but not to long long!) and add it in.
- Sometimes A comes out negative. This is significant, since
- A has more bits than a long int does. */
- if (a < 0)
- v -= (unsigned long int) (- a);
- else
- v += (unsigned long int) a;
- return v;
- }
- #endif
-
- #ifdef L_fixdfdi
- long long
- __fixdfdi (a)
- double a;
- {
- if (a < 0)
- return - __fixunsdfdi (-a);
- return __fixunsdfdi (a);
- }
- #endif
-
- #ifdef L_floatdidf
- #define HIGH_HALFWORD_COEFF (((long long) 1) << (BITS_PER_WORD / 2))
- #define HIGH_WORD_COEFF (((long long) 1) << BITS_PER_WORD)
-
- double
- __floatdidf (u)
- long long u;
- {
- double d;
- int negate = 0;
-
- if (d < 0)
- u = -u, negate = 1;
-
- d = (unsigned int) (u >> BITS_PER_WORD);
- d *= HIGH_HALFWORD_COEFF;
- d *= HIGH_HALFWORD_COEFF;
- d += (unsigned int) (u & (HIGH_WORD_COEFF - 1));
-
- return (negate ? -d : d);
- }
- #endif
-