Initial KLEE checkin.

 - Lots more tweaks, documentation, and web page content is needed,
   but this should compile & work on OS X & Linux.


git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@72205 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 51 insertions, 0 deletions

diff --git a/lib/Solver/ConstantDivision.h b/lib/Solver/ConstantDivision.h
new file mode 100644
index 00000000..9e3e9c95
--- /dev/null
+++ b/lib/Solver/ConstantDivision.h
@@ -0,0 +1,51 @@
+//===-- ConstantDivision.h --------------------------------------*- C++ -*-===//
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __UTIL_CONSTANTDIVISION_H__
+#define __UTIL_CONSTANTDIVISION_H__
+
+#include <stdint.h>
+
+namespace klee {
+
+/// ComputeMultConstants64 - Compute add and sub such that add-sub==x,
+/// while attempting to minimize the number of bits in add and sub
+/// combined.
+void ComputeMultConstants64(uint64_t x, uint64_t &add_out, 
+                            uint64_t &sub_out);
+
+/// Compute the constants to perform a quicker equivalent of a division of some 
+/// 32-bit unsigned integer n by a known constant d (also a 32-bit unsigned 
+/// integer).  The constants to compute n/d without explicit division will be 
+/// stored in mprime, sh1, and sh2 (unsigned 32-bit integers).
+/// 
+/// @param d - denominator (divisor)
+/// 
+/// @param [out] mprime
+/// @param [out] sh1
+/// @param [out] sh2
+void ComputeUDivConstants32(uint32_t d, uint32_t &mprime, uint32_t &sh1, 
+                            uint32_t &sh2);
+
+/// Compute the constants to perform a quicker equivalent of a division of some 
+/// 32-bit signed integer n by a known constant d (also a 32-bit signed 
+/// integer).  The constants to compute n/d without explicit division will be 
+/// stored in mprime, dsign, and shpost (signed 32-bit integers).
+/// 
+/// @param d - denominator (divisor)
+/// 
+/// @param [out] mprime
+/// @param [out] dsign
+/// @param [out] shpost
+void ComputeSDivConstants32(int32_t d, int32_t &mprime, int32_t &dsign, 
+                            int32_t &shpost);
+
+}
+
+#endif