Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpn/generic/sqr.c

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+/* mpn_sqr -- square natural numbers.
+
+Copyright 1991, 1993, 1994, 1996-2003, 2005, 2008, 2009 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"
+#include "longlong.h"
+
+void
+mpn_sqr (mp_ptr p, mp_srcptr a, mp_size_t n)
+{
+  ASSERT (n >= 1);
+  ASSERT (! MPN_OVERLAP_P (p, 2 * n, a, n));
+
+  if (BELOW_THRESHOLD (n, SQR_BASECASE_THRESHOLD))
+    { /* mul_basecase is faster than sqr_basecase on small sizes sometimes */
+      mpn_mul_basecase (p, a, n, a, n);
+    }
+  else if (BELOW_THRESHOLD (n, SQR_TOOM2_THRESHOLD))
+    {
+      mpn_sqr_basecase (p, a, n);
+    }
+  else if (BELOW_THRESHOLD (n, SQR_TOOM3_THRESHOLD))
+    {
+      /* Allocate workspace of fixed size on stack: fast! */
+      mp_limb_t ws[mpn_toom2_sqr_itch (SQR_TOOM3_THRESHOLD_LIMIT-1)];
+      ASSERT (SQR_TOOM3_THRESHOLD <= SQR_TOOM3_THRESHOLD_LIMIT);
+      mpn_toom2_sqr (p, a, n, ws);
+    }
+  else if (BELOW_THRESHOLD (n, SQR_TOOM4_THRESHOLD))
+    {
+      mp_ptr ws;
+      TMP_SDECL;
+      TMP_SMARK;
+      ws = TMP_SALLOC_LIMBS (mpn_toom3_sqr_itch (n));
+      mpn_toom3_sqr (p, a, n, ws);
+      TMP_SFREE;
+    }
+  else if (BELOW_THRESHOLD (n, SQR_TOOM6_THRESHOLD))
+    {
+      mp_ptr ws;
+      TMP_SDECL;
+      TMP_SMARK;
+      ws = TMP_SALLOC_LIMBS (mpn_toom4_sqr_itch (n));
+      mpn_toom4_sqr (p, a, n, ws);
+      TMP_SFREE;
+    }
+  else if (BELOW_THRESHOLD (n, SQR_TOOM8_THRESHOLD))
+    {
+      mp_ptr ws;
+      TMP_SDECL;
+      TMP_SMARK;
+      ws = TMP_SALLOC_LIMBS (mpn_toom6_sqr_itch (n));
+      mpn_toom6_sqr (p, a, n, ws);
+      TMP_SFREE;
+    }
+  else if (BELOW_THRESHOLD (n, SQR_FFT_THRESHOLD))
+    {
+      mp_ptr ws;
+      TMP_DECL;
+      TMP_MARK;
+      ws = TMP_ALLOC_LIMBS (mpn_toom8_sqr_itch (n));
+      mpn_toom8_sqr (p, a, n, ws);
+      TMP_FREE;
+    }
+  else
+    {
+      /* The current FFT code allocates its own space.  That should probably
+	 change.  */
+      mpn_fft_mul (p, a, n, a, n);
+    }
+}