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      1 /**************************************************************************
      2  *
      3  * Copyright 2013 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 /**
     29  * @file
     30  * Helper arithmetic functions with support for overflow detection
     31  * and reporting.
     32  *
     33  * @author Zack Rusin <zackr (at) vmware.com>
     34  */
     35 
     36 
     37 #ifndef LP_BLD_ARIT_OVERFLOW_H
     38 #define LP_BLD_ARIT_OVERFLOW_H
     39 
     40 
     41 #include "gallivm/lp_bld.h"
     42 
     43 struct gallivm_state;
     44 
     45 LLVMValueRef
     46 lp_build_uadd_overflow(struct gallivm_state *gallivm,
     47                        LLVMValueRef a,
     48                        LLVMValueRef b,
     49                        LLVMValueRef *ofbit);
     50 
     51 LLVMValueRef
     52 lp_build_usub_overflow(struct gallivm_state *gallivm,
     53                        LLVMValueRef a,
     54                        LLVMValueRef b,
     55                        LLVMValueRef *ofbit);
     56 
     57 LLVMValueRef
     58 lp_build_umul_overflow(struct gallivm_state *gallivm,
     59                        LLVMValueRef a,
     60                        LLVMValueRef b,
     61                        LLVMValueRef *ofbit);
     62 
     63 #endif /* !LP_BLD_ARIT_OVERFLOW_H */
     64