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Diffstat (limited to 'src/base/random.hh')
-rw-r--r-- | src/base/random.hh | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/base/random.hh b/src/base/random.hh new file mode 100644 index 000000000..def7a4bce --- /dev/null +++ b/src/base/random.hh @@ -0,0 +1,126 @@ +/* + * Copyright (c) 2003-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __BASE_RANDOM_HH__ +#define __BASE_RANDOM_HH__ + +#include "sim/host.hh" + +long getLong(); +double getDouble(); +uint64_t getUniformPos(uint64_t min, uint64_t max); +int64_t getUniform(int64_t min, int64_t max); + +template <typename T> +struct Random; + +template<> struct Random<int8_t> +{ + static int8_t get() + { return getLong() & (int8_t)-1; } + + static int8_t uniform(int8_t min, int8_t max) + { return getUniform(min, max); } +}; + +template<> struct Random<uint8_t> +{ + static uint8_t get() + { return getLong() & (uint8_t)-1; } + + static uint8_t uniform(uint8_t min, uint8_t max) + { return getUniformPos(min, max); } +}; + +template<> struct Random<int16_t> +{ + static int16_t get() + { return getLong() & (int16_t)-1; } + + static int16_t uniform(int16_t min, int16_t max) + { return getUniform(min, max); } +}; + +template<> struct Random<uint16_t> +{ + static uint16_t get() + { return getLong() & (uint16_t)-1; } + + static uint16_t uniform(uint16_t min, uint16_t max) + { return getUniformPos(min, max); } +}; + +template<> struct Random<int32_t> +{ + static int32_t get() + { return (int32_t)getLong(); } + + static int32_t uniform(int32_t min, int32_t max) + { return getUniform(min, max); } +}; + +template<> struct Random<uint32_t> +{ + static uint32_t get() + { return (uint32_t)getLong(); } + + static uint32_t uniform(uint32_t min, uint32_t max) + { return getUniformPos(min, max); } +}; + +template<> struct Random<int64_t> +{ + static int64_t get() + { return (int64_t)getLong() << 32 || (uint64_t)getLong(); } + + static int64_t uniform(int64_t min, int64_t max) + { return getUniform(min, max); } +}; + +template<> struct Random<uint64_t> +{ + static uint64_t get() + { return (uint64_t)getLong() << 32 || (uint64_t)getLong(); } + + static uint64_t uniform(uint64_t min, uint64_t max) + { return getUniformPos(min, max); } +}; + +template<> struct Random<float> +{ + static float get() + { return getDouble(); } +}; + +template<> struct Random<double> +{ + static double get() + { return getDouble(); } +}; + +#endif // __BASE_RANDOM_HH__ |