1 /* frv vliw model. 2 Copyright (C) 1999-2024 Free Software Foundation, Inc. 3 Contributed by Red Hat. 4 5 This file is part of the GNU simulators. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 /* This must come before any other includes. */ 21 #include "defs.h" 22 23 #define WANT_CPU frvbf 24 #define WANT_CPU_FRVBF 25 26 #include "sim-main.h" 27 28 /* Simulator specific vliw related functions. Additional vliw related 29 code used by both the simulator and the assembler is in frv.opc. */ 30 31 int insns_in_slot[UNIT_NUM_UNITS] = {0}; 32 33 void 34 frv_vliw_setup_insn (SIM_CPU *current_cpu, const CGEN_INSN *insn) 35 { 36 FRV_VLIW *vliw; 37 int index; 38 39 /* Always clear the NE index which indicates the target register 40 of a non excepting insn. This will be reset by the insn if 41 necessary. */ 42 frv_interrupt_state.ne_index = NE_NOFLAG; 43 44 vliw = CPU_VLIW (current_cpu); 45 index = vliw->next_slot - 1; 46 if (frv_is_float_insn (insn)) 47 { 48 /* If the insn is to be added and is a floating point insn and 49 it is the first floating point insn in the vliw, then clear 50 FSR0.FTT. */ 51 int i; 52 for (i = 0; i < index; ++i) 53 if (frv_is_float_major (vliw->major[i], vliw->mach)) 54 break; /* found float insn. */ 55 if (i >= index) 56 { 57 SI fsr0 = GET_FSR (0); 58 SET_FSR_FTT (fsr0, FTT_NONE); 59 SET_FSR (0, fsr0); 60 } 61 } 62 else if (frv_is_media_insn (insn)) 63 { 64 /* Clear the appropriate MSR fields depending on which slot 65 this insn is in. */ 66 CGEN_ATTR_VALUE_ENUM_TYPE preserve_ovf; 67 SI msr0 = GET_MSR (0); 68 69 preserve_ovf = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_PRESERVE_OVF); 70 if ((*vliw->current_vliw)[index] == UNIT_FM0) 71 { 72 if (! preserve_ovf) 73 { 74 /* Clear MSR0.OVF and MSR0.SIE. */ 75 CLEAR_MSR_SIE (msr0); 76 CLEAR_MSR_OVF (msr0); 77 } 78 } 79 else 80 { 81 if (! preserve_ovf) 82 { 83 /* Clear MSR1.OVF and MSR1.SIE. */ 84 SI msr1 = GET_MSR (1); 85 CLEAR_MSR_SIE (msr1); 86 CLEAR_MSR_OVF (msr1); 87 SET_MSR (1, msr1); 88 } 89 } 90 SET_MSR (0, msr0); 91 } /* Insn is a media insns. */ 92 COUNT_INSNS_IN_SLOT ((*vliw->current_vliw)[index]); 93 } 94 95