patch-2.3.4 linux/arch/sparc64/math-emu/udivmodti4.c

• Lines: 192
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.3/linux/arch/sparc64/math-emu/udivmodti4.c
• Orig date: Mon Jan 12 15:15:44 1998

diff -u --recursive --new-file v2.3.3/linux/arch/sparc64/math-emu/udivmodti4.c linux/arch/sparc64/math-emu/udivmodti4.c
@@ -1,191 +0,0 @@
-/* This has so very few changes over libgcc2's __udivmoddi4 it isn't funny.  */
-
-#include "soft-fp.h"
-
-#undef count_leading_zeros
-#define count_leading_zeros  __FP_CLZ
-
-void
-_fp_udivmodti4(_FP_W_TYPE q[2], _FP_W_TYPE r[2],
-	       _FP_W_TYPE n1, _FP_W_TYPE n0,
-	       _FP_W_TYPE d1, _FP_W_TYPE d0)
-{
-  _FP_W_TYPE q0, q1, r0, r1;
-  _FP_I_TYPE b, bm;
-
-  if (d1 == 0)
-    {
-#if !UDIV_NEEDS_NORMALIZATION
-      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.  */
-	}
-
-      r0 = n0;
-      r1 = 0;
-
-#else /* UDIV_NEEDS_NORMALIZATION */
-
-      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 >> (_FP_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 SI_TYPE_SIZE are undefined.)  */
-
-	      n1 -= d0;
-	      q1 = 1;
-	    }
-	  else
-	    {
-	      _FP_W_TYPE n2;
-
-	      /* Normalize.  */
-
-	      b = _FP_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.  */
-	}
-
-      r0 = n0 >> bm;
-      r1 = 0;
-#endif /* UDIV_NEEDS_NORMALIZATION */
-    }
-  else
-    {
-      if (d1 > n1)
-	{
-	  /* 00 = nn / DD */
-
-	  q0 = 0;
-	  q1 = 0;
-
-	  /* Remainder in n1n0.  */
-	  r0 = n0;
-	  r1 = n1;
-	}
-      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;
-
-	      r0 = n0;
-	      r1 = n1;
-	    }
-	  else
-	    {
-	      _FP_W_TYPE m1, m0, n2;
-
-	      /* Normalize.  */
-
-	      b = _FP_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.  */
-	      sub_ddmmss (n1, n0, n1, n0, m1, m0);
-	      r0 = (n1 << b) | (n0 >> bm);
-	      r1 = n1 >> bm;
-	    }
-	}
-    }
-
-  q[0] = q0; q[1] = q1;
-  r[0] = r0, r[1] = r1;
-}