bitfields.isa revision 2754:e3d023bc752c 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2006 The Regents of The University of Michigan
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer;
10// redistributions in binary form must reproduce the above copyright
11// notice, this list of conditions and the following disclaimer in the
12// documentation and/or other materials provided with the distribution;
13// neither the name of the copyright holders nor the names of its
14// contributors may be used to endorse or promote products derived from
15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28//
29// Authors: Korey Sewell
30
31////////////////////////////////////////////////////////////////////
32//
33// Bitfield definitions.
34//
35
36def bitfield OPCODE     <31:26>;
37def bitfield OPCODE_HI  <31:29>;
38def bitfield OPCODE_LO  <28:26>;
39
40def bitfield REGIMM      <20:16>;
41def bitfield REGIMM_HI   <20:19>;
42def bitfield REGIMM_LO   <18:16>;
43
44def bitfield FUNCTION      < 5: 0>;
45def bitfield FUNCTION_HI   < 5: 3>;
46def bitfield FUNCTION_LO   < 2: 0>;
47
48def bitfield RS	      <25:21>;
49def bitfield RS_MSB   <25:25>;
50def bitfield RS_HI    <25:24>;
51def bitfield RS_LO    <23:21>;
52def bitfield RS_SRL   <25:22>;
53def bitfield RS_RT    <25:16>;
54def bitfield RT	      <20:16>;
55def bitfield RT_HI    <20:19>;
56def bitfield RT_LO    <18:16>;
57def bitfield RT_RD    <20:11>;
58def bitfield RD	      <15:11>;
59
60def bitfield INTIMM	  <15: 0>;
61
62// Floating-point operate format
63def bitfield FMT      <25:21>;
64def bitfield FR       <25:21>;
65def bitfield FT	      <20:16>;
66def bitfield FS	      <15:11>;
67def bitfield FD	      <10:6>;
68
69def bitfield ND       <17:17>;
70def bitfield TF       <16:16>;
71def bitfield MOVCI    <16:16>;
72def bitfield MOVCF    <16:16>;
73def bitfield SRL      <21:21>;
74def bitfield SRLV     < 6: 6>;
75def bitfield SA       <10: 6>;
76
77// Floating Point Condition Codes
78def bitfield CC <10:8>;
79def bitfield BRANCH_CC <20:18>;
80
81// CP0 Register Select
82def bitfield SEL       < 2: 0>;
83
84// Interrupts
85def bitfield SC       < 5: 5>;
86
87// Branch format
88def bitfield OFFSET <15: 0>; // displacement
89
90// Jmp format
91def bitfield JMPTARG	<25: 0>;
92def bitfield HINT	<10: 6>;
93
94def bitfield SYSCALLCODE <25: 6>;
95def bitfield TRAPCODE    <15:13>;
96
97// EXT/INS instructions
98def bitfield MSB	<15:11>;
99def bitfield LSB	<10: 6>;
100
101// M5 instructions
102def bitfield M5FUNC <7:0>;
103