Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpf/cmp_si.c

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+/* mpf_cmp_si -- Compare a float with a signed integer.
+
+Copyright 1993-1995, 1999-2002, 2004, 2012, 2015 Free Software
+Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of either:
+
+  * the GNU Lesser General Public License as published by the Free
+    Software Foundation; either version 3 of the License, or (at your
+    option) any later version.
+
+or
+
+  * the GNU General Public License as published by the Free Software
+    Foundation; either version 2 of the License, or (at your option) any
+    later version.
+
+or both in parallel, as here.
+
+The GNU MP Library 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 copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library.  If not,
+see https://www.gnu.org/licenses/.  */
+
+#include "gmp-impl.h"
+
+int
+mpf_cmp_si (mpf_srcptr u, long int vval) __GMP_NOTHROW
+{
+  mp_srcptr up;
+  mp_size_t usize;
+  mp_exp_t uexp;
+  mp_limb_t ulimb;
+  int usign;
+  unsigned long abs_vval;
+
+  usize = SIZ (u);
+
+  /* 1. Are the signs different?  */
+  if ((usize < 0) == (vval < 0)) /* don't use xor, type size may differ */
+    {
+      /* U and V are both non-negative or both negative.  */
+      if (usize == 0)
+	/* vval >= 0 */
+	return -(vval != 0);
+      if (vval == 0)
+	/* usize >= 0 */
+	return usize != 0;
+      /* Fall out.  */
+    }
+  else
+    {
+      /* Either U or V is negative, but not both.  */
+      return usize >= 0 ? 1 : -1;
+    }
+
+  /* U and V have the same sign and are both non-zero.  */
+
+  /* 2. Are the exponents different (V's exponent == 1)?  */
+  uexp = EXP (u);
+  usign = usize >= 0 ? 1 : -1;
+  usize = ABS (usize);
+  abs_vval = ABS_CAST (unsigned long, vval);
+
+#if GMP_NAIL_BITS != 0
+  if (uexp != 1 + (abs_vval > GMP_NUMB_MAX))
+    return (uexp < 1 + (abs_vval > GMP_NUMB_MAX)) ? -usign : usign;
+#else
+  if (uexp != 1)
+    return (uexp < 1) ? -usign : usign;
+#endif
+
+  up = PTR (u);
+
+  ASSERT (usize > 0);
+  ulimb = up[--usize];
+#if GMP_NAIL_BITS != 0
+  if (uexp == 2)
+    {
+      if ((ulimb >> GMP_NAIL_BITS) != 0)
+	return usign;
+      ulimb = (ulimb << GMP_NUMB_BITS);
+      if (usize != 0) ulimb |= up[--usize];
+    }
+#endif
+
+  /* 3. Compare the most significant mantissa limb with V.  */
+  if (ulimb != abs_vval)
+    return (ulimb < abs_vval) ? -usign : usign;
+
+  /* Ignore zeroes at the low end of U.  */
+  for (; *up == 0; ++up)
+    --usize;
+
+  /* 4. Now, if the number of limbs are different, we have a difference
+     since we have made sure the trailing limbs are not zero.  */
+  if (usize > 0)
+    return usign;
+
+  /* Wow, we got zero even if we tried hard to avoid it.  */
+  return 0;
+}