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b34f6357 1/* frv vliw model.
6aba47ca 2 Copyright (C) 1999, 2000, 2001, 2003, 2007 Free Software Foundation, Inc.
b34f6357
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3 Contributed by Red Hat.
4
5This file is part of the GNU simulators.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License along
18with this program; if not, write to the Free Software Foundation, Inc.,
1959 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#define WANT_CPU frvbf
22#define WANT_CPU_FRVBF
23
24#include "sim-main.h"
25
26/* Simulator specific vliw related functions. Additional vliw related
27 code used by both the simulator and the assembler is in frv.opc. */
28
29int insns_in_slot[UNIT_NUM_UNITS] = {0};
30
31void
32frv_vliw_setup_insn (SIM_CPU *current_cpu, const CGEN_INSN *insn)
33{
34 FRV_VLIW *vliw;
35 int index;
36
37 /* Always clear the NE index which indicates the target register
38 of a non excepting insn. This will be reset by the insn if
39 necessary. */
40 frv_interrupt_state.ne_index = NE_NOFLAG;
41
42 vliw = CPU_VLIW (current_cpu);
43 index = vliw->next_slot - 1;
44 if (frv_is_float_insn (insn))
45 {
46 /* If the insn is to be added and is a floating point insn and
47 it is the first floating point insn in the vliw, then clear
48 FSR0.FTT. */
49 int i;
50 for (i = 0; i < index; ++i)
51 if (frv_is_float_major (vliw->major[i], vliw->mach))
52 break; /* found float insn. */
53 if (i >= index)
54 {
55 SI fsr0 = GET_FSR (0);
56 SET_FSR_FTT (fsr0, FTT_NONE);
57 SET_FSR (0, fsr0);
58 }
59 }
60 else if (frv_is_media_insn (insn))
61 {
62 /* Clear the appropriate MSR fields depending on which slot
63 this insn is in. */
79e59fe6 64 CGEN_ATTR_VALUE_ENUM_TYPE preserve_ovf;
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65 SI msr0 = GET_MSR (0);
66
67 preserve_ovf = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_PRESERVE_OVF);
68 if ((*vliw->current_vliw)[index] == UNIT_FM0)
69 {
70 if (! preserve_ovf)
71 {
72 /* Clear MSR0.OVF and MSR0.SIE. */
73 CLEAR_MSR_SIE (msr0);
74 CLEAR_MSR_OVF (msr0);
75 }
76 }
77 else
78 {
79 if (! preserve_ovf)
80 {
81 /* Clear MSR1.OVF and MSR1.SIE. */
82 SI msr1 = GET_MSR (1);
83 CLEAR_MSR_SIE (msr1);
84 CLEAR_MSR_OVF (msr1);
85 SET_MSR (1, msr1);
86 }
87 }
88 SET_MSR (0, msr0);
89 } /* Insn is a media insns. */
90 COUNT_INSNS_IN_SLOT ((*vliw->current_vliw)[index]);
91}
92