[gcc] GCC 4.5.0=>4.5.1

gcc/gmp/mpn/s390/README

Index: gcc/gmp/mpn/s390/README
diff --git a/gcc/gmp/mpn/s390/README b/gcc/gmp/mpn/s390/README
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-All current (2001) S/390 and z/Architecture machines are single-issue,
-but some newer machines have a deep pipeline.  Software-pipelining is
-therefore beneficial.
-
-* mpn_add_n, mpn_sub_n: Use code along the lines below.  Two-way unrolling
-  would be adequate.
-
-  mp_limb_t
-  mpn_add_n (mp_ptr rp, mp_srcptr up, mp_srcptr vp, mp_size_t n)
-  {
-    mp_limb_t a, b, r, cy;
-    mp_size_t i;
-    mp_limb_t mm = -1;
-
-    cy = 0;
-    up += n;
-    vp += n;
-    rp += n;
-    i = -n;
-    do
-      {
-	a = up[i];
-	b = vp[i];
-	r = a + b + cy;
-	rp[i] = r;
-	cy = (((a & b) | ((a | b) & (r ^ mm)))) >> 31;
-	i++;
-      }
-    while (i < 0);
-    return cy;
-  }
-
-* mpn_lshift, mpn_rshift: Use SLDL/SRDL, and two-way unrolling.
-
-* mpn_mul_1, mpn_addmul_1, mpn_submul_1: For machines with just signed
-  multiply (MR), use two loops, similar to the corresponding VAX or
-  POWER functions.  Handle carry like for mpn_add_n.