diff options
author | Kevin Lim <ktlim@umich.edu> | 2006-05-31 11:34:42 -0400 |
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committer | Kevin Lim <ktlim@umich.edu> | 2006-05-31 11:34:42 -0400 |
commit | d4b73086b6b0856c28433b55c8dd5c7b56a1b6df (patch) | |
tree | b54cb10579c6c5788fc09e7abd5d3a0ab1dd533c /src/cpu/o3/sat_counter.hh | |
parent | d77d39daee5c3ba8483d58911a1d5b12c4707040 (diff) | |
parent | 4a5b51b516853c9fcaabc44caacdd7e8e93dc0ef (diff) | |
download | gem5-d4b73086b6b0856c28433b55c8dd5c7b56a1b6df.tar.xz |
Merge ktlim@zizzer:/bk/newmem
into zamp.eecs.umich.edu:/z/ktlim2/clean/newmem
--HG--
extra : convert_revision : 3d951bbeee0178de47e1bdbe704808544bfe732e
Diffstat (limited to 'src/cpu/o3/sat_counter.hh')
-rw-r--r-- | src/cpu/o3/sat_counter.hh | 49 |
1 files changed, 36 insertions, 13 deletions
diff --git a/src/cpu/o3/sat_counter.hh b/src/cpu/o3/sat_counter.hh index b7cfe6423..d01fd93ce 100644 --- a/src/cpu/o3/sat_counter.hh +++ b/src/cpu/o3/sat_counter.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2005 The Regents of The University of Michigan + * Copyright (c) 2005-2006 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -26,8 +26,8 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef __CPU_O3_CPU_SAT_COUNTER_HH__ -#define __CPU_O3_CPU_SAT_COUNTER_HH__ +#ifndef __CPU_O3_SAT_COUNTER_HH__ +#define __CPU_O3_SAT_COUNTER_HH__ #include "sim/host.hh" @@ -44,47 +44,70 @@ class SatCounter /** * Constructor for the counter. */ - SatCounter(); + SatCounter() + : initialVal(0), counter(0) + { } /** * Constructor for the counter. * @param bits How many bits the counter will have. */ - SatCounter(unsigned bits); + SatCounter(unsigned bits) + : initialVal(0), maxVal((1 << bits) - 1), counter(0) + { } /** * Constructor for the counter. * @param bits How many bits the counter will have. * @param initial_val Starting value for each counter. */ - SatCounter(unsigned bits, unsigned initial_val); + SatCounter(unsigned bits, uint8_t initial_val) + : initialVal(initialVal), maxVal((1 << bits) - 1), counter(initial_val) + { + // Check to make sure initial value doesn't exceed the max + // counter value. + if (initial_val > maxVal) { + fatal("BP: Initial counter value exceeds max size."); + } + } /** * Sets the number of bits. */ - void setBits(unsigned bits); + void setBits(unsigned bits) { maxVal = (1 << bits) - 1; } + + void reset() { counter = initialVal; } /** * Increments the counter's current value. */ - void increment(); + void increment() + { + if (counter < maxVal) { + ++counter; + } + } /** * Decrements the counter's current value. */ - void decrement(); + void decrement() + { + if (counter > 0) { + --counter; + } + } /** * Read the counter's value. */ const uint8_t read() const - { - return counter; - } + { return counter; } private: + uint8_t initialVal; uint8_t maxVal; uint8_t counter; }; -#endif // __CPU_O3_CPU_SAT_COUNTER_HH__ +#endif // __CPU_O3_SAT_COUNTER_HH__ |