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Diffstat (limited to 'arch/nios2/lib/libgcc.c')
-rw-r--r--arch/nios2/lib/libgcc.c592
1 files changed, 592 insertions, 0 deletions
diff --git a/arch/nios2/lib/libgcc.c b/arch/nios2/lib/libgcc.c
new file mode 100644
index 000000000..dc0562762
--- /dev/null
+++ b/arch/nios2/lib/libgcc.c
@@ -0,0 +1,592 @@
+/*
+ * This file is part of GNU CC.
+ *
+ * GNU CC 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.
+ *
+ * GNU CC 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 GNU CC; see the file COPYING. If not, write
+ * to the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+typedef unsigned int UWtype;
+typedef unsigned int UHWtype;
+typedef unsigned long long UDWtype;
+#define W_TYPE_SIZE 32
+
+typedef unsigned char UQItype;
+typedef long SItype;
+typedef unsigned long USItype;
+typedef long long DItype;
+typedef unsigned long long DSItype;
+
+#include "longlong.h"
+
+
+typedef int word_type;
+typedef long Wtype;
+typedef long long DWtype;
+
+struct DWstruct { Wtype low, high;};
+
+typedef union
+{
+ struct DWstruct s;
+ DWtype ll;
+} DWunion;
+
+#define BITS_PER_UNIT 8
+
+UDWtype
+__udivmoddi4 (UDWtype n, UDWtype d, UDWtype *rp);
+
+const UQItype __clz_tab[256] =
+{
+ 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+};
+
+
+DWtype
+__ashldi3 (DWtype u, word_type b)
+{
+ if (b == 0)
+ return u;
+
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
+
+ if (bm <= 0)
+ {
+ w.s.low = 0;
+ w.s.high = (UWtype) uu.s.low << -bm;
+ }
+ else
+ {
+ const UWtype carries = (UWtype) uu.s.low >> bm;
+
+ w.s.low = (UWtype) uu.s.low << b;
+ w.s.high = ((UWtype) uu.s.high << b) | carries;
+ }
+
+ return w.ll;
+}
+
+DWtype
+__ashrdi3 (DWtype u, word_type b)
+{
+ if (b == 0)
+ return u;
+
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
+
+ if (bm <= 0)
+ {
+ /* w.s.high = 1..1 or 0..0 */
+ w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
+ w.s.low = uu.s.high >> -bm;
+ }
+ else
+ {
+ const UWtype carries = (UWtype) uu.s.high << bm;
+
+ w.s.high = uu.s.high >> b;
+ w.s.low = ((UWtype) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
+
+DWtype
+__lshrdi3 (DWtype u, word_type b)
+{
+ if (b == 0)
+ return u;
+
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
+
+ if (bm <= 0)
+ {
+ w.s.high = 0;
+ w.s.low = (UWtype) uu.s.high >> -bm;
+ }
+ else
+ {
+ const UWtype carries = (UWtype) uu.s.high << bm;
+
+ w.s.high = (UWtype) uu.s.high >> b;
+ w.s.low = ((UWtype) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
+
+word_type
+__cmpdi2 (DWtype a, DWtype b)
+{
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
+
+ if (au.s.high < bu.s.high)
+ return 0;
+ else if (au.s.high > bu.s.high)
+ return 2;
+ if ((UWtype) au.s.low < (UWtype) bu.s.low)
+ return 0;
+ else if ((UWtype) au.s.low > (UWtype) bu.s.low)
+ return 2;
+ return 1;
+}
+
+UDWtype
+__udivmoddi4 (UDWtype n, UDWtype d, UDWtype *rp)
+{
+ const DWunion nn = {.ll = n};
+ const DWunion dd = {.ll = d};
+ DWunion rr;
+ UWtype d0, d1, n0, n1, n2;
+ UWtype q0, q1;
+ UWtype b, bm;
+
+ d0 = dd.s.low;
+ d1 = dd.s.high;
+ n0 = nn.s.low;
+ n1 = nn.s.high;
+
+#if !UDIV_NEEDS_NORMALIZATION
+ if (d1 == 0)
+ {
+ if (d0 > n1)
+ {
+ /* 0q = nn / 0D */
+
+ udiv_qrnnd (q0, n0, n1, n0, d0);
+ q1 = 0;
+
+ /* Remainder in n0. */
+ }
+ else
+ {
+ /* qq = NN / 0d */
+
+ if (d0 == 0)
+ d0 = 1 / d0; /* Divide intentionally by zero. */
+
+ udiv_qrnnd (q1, n1, 0, n1, d0);
+ udiv_qrnnd (q0, n0, n1, n0, d0);
+
+ /* Remainder in n0. */
+ }
+
+ if (rp != 0)
+ {
+ rr.s.low = n0;
+ rr.s.high = 0;
+ *rp = rr.ll;
+ }
+ }
+
+#else /* UDIV_NEEDS_NORMALIZATION */
+
+ if (d1 == 0)
+ {
+ if (d0 > n1)
+ {
+ /* 0q = nn / 0D */
+
+ count_leading_zeros (bm, d0);
+
+ if (bm != 0)
+ {
+ /* Normalize, i.e. make the most significant bit of the
+ denominator set. */
+
+ d0 = d0 << bm;
+ n1 = (n1 << bm) | (n0 >> (W_TYPE_SIZE - bm));
+ n0 = n0 << bm;
+ }
+
+ udiv_qrnnd (q0, n0, n1, n0, d0);
+ q1 = 0;
+
+ /* Remainder in n0 >> bm. */
+ }
+ else
+ {
+ /* qq = NN / 0d */
+
+ if (d0 == 0)
+ d0 = 1 / d0; /* Divide intentionally by zero. */
+
+ count_leading_zeros (bm, d0);
+
+ if (bm == 0)
+ {
+ /* From (n1 >= d0) /\ (the most significant bit of d0 is set),
+ conclude (the most significant bit of n1 is set) /\ (the
+ leading quotient digit q1 = 1).
+
+ This special case is necessary, not an optimization.
+ (Shifts counts of W_TYPE_SIZE are undefined.) */
+
+ n1 -= d0;
+ q1 = 1;
+ }
+ else
+ {
+ /* Normalize. */
+
+ b = W_TYPE_SIZE - bm;
+
+ d0 = d0 << bm;
+ n2 = n1 >> b;
+ n1 = (n1 << bm) | (n0 >> b);
+ n0 = n0 << bm;
+
+ udiv_qrnnd (q1, n1, n2, n1, d0);
+ }
+
+ /* n1 != d0... */
+
+ udiv_qrnnd (q0, n0, n1, n0, d0);
+
+ /* Remainder in n0 >> bm. */
+ }
+
+ if (rp != 0)
+ {
+ rr.s.low = n0 >> bm;
+ rr.s.high = 0;
+ *rp = rr.ll;
+ }
+ }
+#endif /* UDIV_NEEDS_NORMALIZATION */
+
+ else
+ {
+ if (d1 > n1)
+ {
+ /* 00 = nn / DD */
+
+ q0 = 0;
+ q1 = 0;
+
+ /* Remainder in n1n0. */
+ if (rp != 0)
+ {
+ rr.s.low = n0;
+ rr.s.high = n1;
+ *rp = rr.ll;
+ }
+ }
+ else
+ {
+ /* 0q = NN / dd */
+
+ count_leading_zeros (bm, d1);
+ if (bm == 0)
+ {
+ /* From (n1 >= d1) /\ (the most significant bit of d1 is set),
+ conclude (the most significant bit of n1 is set) /\ (the
+ quotient digit q0 = 0 or 1).
+
+ This special case is necessary, not an optimization. */
+
+ /* The condition on the next line takes advantage of that
+ n1 >= d1 (true due to program flow). */
+ if (n1 > d1 || n0 >= d0)
+ {
+ q0 = 1;
+ sub_ddmmss (n1, n0, n1, n0, d1, d0);
+ }
+ else
+ q0 = 0;
+
+ q1 = 0;
+
+ if (rp != 0)
+ {
+ rr.s.low = n0;
+ rr.s.high = n1;
+ *rp = rr.ll;
+ }
+ }
+ else
+ {
+ UWtype m1, m0;
+ /* Normalize. */
+
+ b = W_TYPE_SIZE - bm;
+
+ d1 = (d1 << bm) | (d0 >> b);
+ d0 = d0 << bm;
+ n2 = n1 >> b;
+ n1 = (n1 << bm) | (n0 >> b);
+ n0 = n0 << bm;
+
+ udiv_qrnnd (q0, n1, n2, n1, d1);
+ umul_ppmm (m1, m0, q0, d0);
+
+ if (m1 > n1 || (m1 == n1 && m0 > n0))
+ {
+ q0--;
+ sub_ddmmss (m1, m0, m1, m0, d1, d0);
+ }
+
+ q1 = 0;
+
+ /* Remainder in (n1n0 - m1m0) >> bm. */
+ if (rp != 0)
+ {
+ sub_ddmmss (n1, n0, n1, n0, m1, m0);
+ rr.s.low = (n1 << b) | (n0 >> bm);
+ rr.s.high = n1 >> bm;
+ *rp = rr.ll;
+ }
+ }
+ }
+ }
+
+ const DWunion ww = {{.low = q0, .high = q1}};
+ return ww.ll;
+}
+
+DWtype
+__divdi3 (DWtype u, DWtype v)
+{
+ word_type c = 0;
+ DWunion uu = {.ll = u};
+ DWunion vv = {.ll = v};
+ DWtype w;
+
+ if (uu.s.high < 0)
+ c = ~c,
+ uu.ll = -uu.ll;
+ if (vv.s.high < 0)
+ c = ~c,
+ vv.ll = -vv.ll;
+
+ w = __udivmoddi4 (uu.ll, vv.ll, (UDWtype *) 0);
+ if (c)
+ w = -w;
+
+ return w;
+}
+
+DWtype
+__negdi2 (DWtype u)
+{
+ const DWunion uu = {.ll = u};
+ const DWunion w = { {.low = -uu.s.low,
+ .high = -uu.s.high - ((UWtype) -uu.s.low > 0) } };
+
+ return w.ll;
+}
+
+
+DWtype
+__muldi3 (DWtype u, DWtype v)
+{
+ const DWunion uu = {.ll = u};
+ const DWunion vv = {.ll = v};
+ DWunion w = {.ll = __umulsidi3 (uu.s.low, vv.s.low)};
+
+ w.s.high += ((UWtype) uu.s.low * (UWtype) vv.s.high
+ + (UWtype) uu.s.high * (UWtype) vv.s.low);
+
+ return w.ll;
+}
+
+DWtype
+__moddi3 (DWtype u, DWtype v)
+{
+ word_type c = 0;
+ DWunion uu = {.ll = u};
+ DWunion vv = {.ll = v};
+ DWtype w;
+
+ if (uu.s.high < 0)
+ c = ~c,
+ uu.ll = -uu.ll;
+ if (vv.s.high < 0)
+ vv.ll = -vv.ll;
+
+ (void) __udivmoddi4 (uu.ll, vv.ll, (UDWtype*)&w);
+ if (c)
+ w = -w;
+
+ return w;
+}
+
+word_type
+__ucmpdi2 (DWtype a, DWtype b)
+{
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
+
+ if ((UWtype) au.s.high < (UWtype) bu.s.high)
+ return 0;
+ else if ((UWtype) au.s.high > (UWtype) bu.s.high)
+ return 2;
+ if ((UWtype) au.s.low < (UWtype) bu.s.low)
+ return 0;
+ else if ((UWtype) au.s.low > (UWtype) bu.s.low)
+ return 2;
+ return 1;
+}
+
+
+UDWtype
+__udivdi3 (UDWtype n, UDWtype d)
+{
+ return __udivmoddi4 (n, d, (UDWtype *) 0);
+}
+
+UDWtype
+__umoddi3 (UDWtype u, UDWtype v)
+{
+ UDWtype w;
+ (void) __udivmoddi4 (u, v, &w);
+
+ return w;
+}
+
+static USItype
+udivmodsi4(USItype num, USItype den, word_type modwanted)
+{
+ USItype bit = 1;
+ USItype res = 0;
+
+ while (den < num && bit && !(den & (1L<<31)))
+ {
+ den <<=1;
+ bit <<=1;
+ }
+ while (bit)
+ {
+ if (num >= den)
+ {
+ num -= den;
+ res |= bit;
+ }
+ bit >>=1;
+ den >>=1;
+ }
+ if (modwanted) return num;
+ return res;
+}
+
+SItype
+__divsi3 (SItype a, SItype b)
+{
+ word_type neg = 0;
+ SItype res;
+
+ if (a < 0)
+ {
+ a = -a;
+ neg = !neg;
+ }
+
+ if (b < 0)
+ {
+ b = -b;
+ neg = !neg;
+ }
+
+ res = udivmodsi4 (a, b, 0);
+
+ if (neg)
+ res = -res;
+
+ return res;
+}
+
+
+SItype
+__udivsi3 (SItype a, SItype b)
+{
+ return udivmodsi4 (a, b, 0);
+}
+
+
+SItype
+__modsi3 (SItype a, SItype b)
+{
+ word_type neg = 0;
+ SItype res;
+
+ if (a < 0)
+ {
+ a = -a;
+ neg = 1;
+ }
+
+ if (b < 0)
+ b = -b;
+
+ res = udivmodsi4 (a, b, 1);
+
+ if (neg)
+ res = -res;
+
+ return res;
+}
+
+SItype
+__mulsi3 (SItype a, SItype b)
+{
+ SItype res = 0;
+ USItype cnt = a;
+
+ while (cnt)
+ {
+ if (cnt & 1)
+ {
+ res += b;
+ }
+ b <<= 1;
+ cnt >>= 1;
+ }
+
+ return res;
+}
+
+SItype
+__umodsi3 (SItype a, SItype b)
+
+{
+ return udivmodsi4 (a, b, 1);
+}
+
+int
+__gcc_bcmp (const unsigned char *s1, const unsigned char *s2, unsigned long size)
+{
+ while (size > 0)
+ {
+ const unsigned char c1 = *s1++, c2 = *s2++;
+ if (c1 != c2)
+ return c1 - c2;
+ size--;
+ }
+ return 0;
+}
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