| /* Copyright (C) 2004-2022 Free Software Foundation, Inc. |

| Contributor: Joern Rennecke <joern.rennecke@embecosm.com> |

| on behalf of Synopsys Inc. |

| |

| This file 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 3, or (at your option) any |

| later version. |

| |

| In addition to the permissions in the GNU General Public License, the |

| Free Software Foundation gives you unlimited permission to link the |

| compiled version of this file into combinations with other programs, |

| and to distribute those combinations without any restriction coming |

| from the use of this file. (The General Public License restrictions |

| do apply in other respects; for example, they cover modification of |

| the file, and distribution when not linked into a combine |

| executable.) |

| |

| This file 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 this program; see the file COPYING3. If not see |

| <http://www.gnu.org/licenses/>. */ |

| |

| /* Calculate division table for ARC700 integer division |

| Contributed by Joern Rennecke |

| joern.rennecke@arc.com */ |

| |

| #include <stdio.h> |

| #include <math.h> |

| |

| int |

| main () |

| { |

| int i, j; |

| unsigned x; |

| double q, r, err, max_err = -1; |

| |

| puts("/* This table has been generated by divtab-arc700.c. */"); |

| puts("\ |

| /* 1/512 .. 1/256, normalized. There is a leading 1 in bit 31.\n\ |

| For powers of two, we list unnormalized numbers instead. The values\n\ |

| for powers of 2 are loaded, but not used. The value for 1 is actually\n\ |

| the first instruction after .Lmuldiv. */\n\ |

| .balign 4"); |

| puts (".Ldivtab:\n"); |

| for (i = 256; i >= 2; --i) |

| { |

| j = i < 0 ? -i : i; |

| if (j & (j-1)) |

| while (j < 128) |

| j += j; |

| else |

| /* Power of two. */ |

| j *= 128; |

| q = 4.*(1<<30)*128/j; |

| r = ceil (q); |

| printf ("\t.long\t0x%X\n", (unsigned) r); |

| err = r - q; |

| if (err > max_err) |

| max_err = err; |

| } |

| #if 0 |

| printf ("\t/* maximum error: %f */\n", max_err); |

| #endif |

| exit (0); |

| } |