-/** @file
- Compiler intrinsic for 32-bit unsigned div, ported from LLVM code.
-
- Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
-
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-/**
- University of Illinois/NCSA
- Open Source License
-
- Copyright (c) 2003-2008 University of Illinois at Urbana-Champaign.
- All rights reserved.
-
- Developed by:
-
- LLVM Team
-
- University of Illinois at Urbana-Champaign
-
- http://llvm.org
-
- Permission is hereby granted, free of charge, to any person obtaining a copy of
- this software and associated documentation files (the "Software"), to deal with
- the Software without restriction, including without limitation the rights to
- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- of the Software, and to permit persons to whom the Software is furnished to do
- so, subject to the following conditions:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimers.
-
- * Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimers in the
- documentation and/or other materials provided with the distribution.
-
- * Neither the names of the LLVM Team, University of Illinois at
- Urbana-Champaign, nor the names of its contributors may be used to
- endorse or promote products derived from this Software without specific
- prior written permission.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
- SOFTWARE.
-**/
-
-
-#include "Llvm_int_lib.h"
-
-
-// Returns: n / d
-
-// Translated from Figure 3-40 of The PowerPC Compiler Writer's Guide
-
-UINT32
-__udivsi3(UINT32 n, UINT32 d)
-{
- const unsigned n_uword_bits = sizeof(UINT32) * CHAR_BIT;
- UINT32 q;
- UINT32 r;
- unsigned sr;
-
- // special cases
- if (d == 0) {
-// ASSERT (FALSE);
- return 0; // ?!
- }
- if (n == 0)
- return 0;
-
- sr = COUNT_LEADING_ZEROS(d) - COUNT_LEADING_ZEROS(n);
- // 0 <= sr <= n_uword_bits - 1 or sr large
- if (sr > n_uword_bits - 1) // d > r
- return 0;
- if (sr == n_uword_bits - 1) // d == 1
- return n;
- ++sr;
- // 1 <= sr <= n_uword_bits - 1
- // Not a special case
- q = n << (n_uword_bits - sr);
- r = n >> sr;
- UINT32 carry = 0;
- for (; sr > 0; --sr)
- {
- // r:q = ((r:q) << 1) | carry
- r = (r << 1) | (q >> (n_uword_bits - 1));
- q = (q << 1) | carry;
- // carry = 0;
- // if (r.all >= d.all)
- // {
- // r.all -= d.all;
- // carry = 1;
- // }
- const INT32 s = (INT32)(d - r - 1) >> (n_uword_bits - 1);
- carry = s & 1;
- r -= d & s;
- }
- q = (q << 1) | carry;
- return q;
-}
+/** @file\r
+ Compiler intrinsic for 32-bit unsigned div, ported from LLVM code.\r
+\r
+ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
+ \r
+ This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+/**\r
+ University of Illinois/NCSA\r
+ Open Source License\r
+ \r
+ Copyright (c) 2003-2008 University of Illinois at Urbana-Champaign.\r
+ All rights reserved.\r
+ \r
+ Developed by:\r
+ \r
+ LLVM Team\r
+ \r
+ University of Illinois at Urbana-Champaign\r
+ \r
+ http://llvm.org\r
+ \r
+ Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+ this software and associated documentation files (the "Software"), to deal with\r
+ the Software without restriction, including without limitation the rights to\r
+ use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies\r
+ of the Software, and to permit persons to whom the Software is furnished to do\r
+ so, subject to the following conditions:\r
+ \r
+ * Redistributions of source code must retain the above copyright notice,\r
+ this list of conditions and the following disclaimers.\r
+ \r
+ * Redistributions in binary form must reproduce the above copyright notice,\r
+ this list of conditions and the following disclaimers in the\r
+ documentation and/or other materials provided with the distribution.\r
+ \r
+ * Neither the names of the LLVM Team, University of Illinois at\r
+ Urbana-Champaign, nor the names of its contributors may be used to\r
+ endorse or promote products derived from this Software without specific\r
+ prior written permission.\r
+ \r
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+ FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r
+ CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE\r
+ SOFTWARE.\r
+**/\r
+\r
+\r
+#include "Llvm_int_lib.h"\r
+\r
+\r
+// Returns: n / d\r
+\r
+// Translated from Figure 3-40 of The PowerPC Compiler Writer's Guide\r
+\r
+UINT32\r
+__udivsi3(UINT32 n, UINT32 d)\r
+{\r
+ const unsigned n_uword_bits = sizeof(UINT32) * CHAR_BIT;\r
+ UINT32 q;\r
+ UINT32 r;\r
+ unsigned sr;\r
+\r
+ // special cases\r
+ if (d == 0) {\r
+// ASSERT (FALSE);\r
+ return 0; // ?!\r
+ }\r
+ if (n == 0)\r
+ return 0;\r
+\r
+ sr = COUNT_LEADING_ZEROS(d) - COUNT_LEADING_ZEROS(n);\r
+ // 0 <= sr <= n_uword_bits - 1 or sr large\r
+ if (sr > n_uword_bits - 1) // d > r\r
+ return 0;\r
+ if (sr == n_uword_bits - 1) // d == 1\r
+ return n;\r
+ ++sr;\r
+ // 1 <= sr <= n_uword_bits - 1\r
+ // Not a special case\r
+ q = n << (n_uword_bits - sr);\r
+ r = n >> sr;\r
+ UINT32 carry = 0;\r
+ for (; sr > 0; --sr)\r
+ {\r
+ // r:q = ((r:q) << 1) | carry\r
+ r = (r << 1) | (q >> (n_uword_bits - 1));\r
+ q = (q << 1) | carry;\r
+ // carry = 0;\r
+ // if (r.all >= d.all)\r
+ // {\r
+ // r.all -= d.all;\r
+ // carry = 1;\r
+ // }\r
+ const INT32 s = (INT32)(d - r - 1) >> (n_uword_bits - 1);\r
+ carry = s & 1;\r
+ r -= d & s;\r
+ }\r
+ q = (q << 1) | carry;\r
+ return q;\r
+}\r
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