2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "base/trace.hh"
31 #include "cpu/beta_cpu/free_list.hh"
33 SimpleFreeList::SimpleFreeList(unsigned _numLogicalIntRegs
,
34 unsigned _numPhysicalIntRegs
,
35 unsigned _numLogicalFloatRegs
,
36 unsigned _numPhysicalFloatRegs
)
37 : numLogicalIntRegs(_numLogicalIntRegs
),
38 numPhysicalIntRegs(_numPhysicalIntRegs
),
39 numLogicalFloatRegs(_numLogicalFloatRegs
),
40 numPhysicalFloatRegs(_numPhysicalFloatRegs
),
41 numPhysicalRegs(numPhysicalIntRegs
+ numPhysicalFloatRegs
)
43 DPRINTF(FreeList
, "FreeList: Creating new free list object.\n");
46 freeIntRegsScoreboard
.resize(numPhysicalIntRegs
);
48 freeFloatRegsScoreboard
.resize(numPhysicalRegs
);
50 for (PhysRegIndex i
= 0; i
< numLogicalIntRegs
; ++i
) {
51 freeIntRegsScoreboard
[i
] = 0;
54 // Put all of the extra physical registers onto the free list. This
55 // means excluding all of the base logical registers.
56 for (PhysRegIndex i
= numLogicalIntRegs
;
57 i
< numPhysicalIntRegs
; ++i
)
61 freeIntRegsScoreboard
[i
] = 1;
64 for (PhysRegIndex i
= 0; i
< numPhysicalIntRegs
+ numLogicalFloatRegs
;
67 freeFloatRegsScoreboard
[i
] = 0;
70 // Put all of the extra physical registers onto the free list. This
71 // means excluding all of the base logical registers. Because the
72 // float registers' indices start where the physical registers end,
73 // some math must be done to determine where the free registers start.
74 for (PhysRegIndex i
= numPhysicalIntRegs
+ numLogicalFloatRegs
;
75 i
< numPhysicalRegs
; ++i
)
77 freeFloatRegs
.push(i
);
79 freeFloatRegsScoreboard
[i
] = 1;