utility.cc revision 2706
12686Sksewell@umich.edu/* 22686Sksewell@umich.edu * Copyright (c) 2003-2006 The Regents of The University of Michigan 32686Sksewell@umich.edu * All rights reserved. 42686Sksewell@umich.edu * 52686Sksewell@umich.edu * Redistribution and use in source and binary forms, with or without 62686Sksewell@umich.edu * modification, are permitted provided that the following conditions are 72686Sksewell@umich.edu * met: redistributions of source code must retain the above copyright 82686Sksewell@umich.edu * notice, this list of conditions and the following disclaimer; 92686Sksewell@umich.edu * redistributions in binary form must reproduce the above copyright 102686Sksewell@umich.edu * notice, this list of conditions and the following disclaimer in the 112686Sksewell@umich.edu * documentation and/or other materials provided with the distribution; 122686Sksewell@umich.edu * neither the name of the copyright holders nor the names of its 132686Sksewell@umich.edu * contributors may be used to endorse or promote products derived from 142686Sksewell@umich.edu * this software without specific prior written permission. 152686Sksewell@umich.edu * 162686Sksewell@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172686Sksewell@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182686Sksewell@umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192686Sksewell@umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202686Sksewell@umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212686Sksewell@umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222686Sksewell@umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232686Sksewell@umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242686Sksewell@umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252686Sksewell@umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262686Sksewell@umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272706Sksewell@umich.edu * 282706Sksewell@umich.edu * Authors: Korey Sewell 292686Sksewell@umich.edu */ 302686Sksewell@umich.edu 312686Sksewell@umich.edu#include "arch/mips/isa_traits.hh" 322686Sksewell@umich.edu#include "arch/mips/utility.hh" 332686Sksewell@umich.edu#include "config/full_system.hh" 342686Sksewell@umich.edu#include "cpu/static_inst.hh" 352686Sksewell@umich.edu#include "sim/serialize.hh" 362686Sksewell@umich.edu#include "base/bitfield.hh" 372686Sksewell@umich.edu 382686Sksewell@umich.eduusing namespace MipsISA; 392686Sksewell@umich.eduusing namespace std; 402686Sksewell@umich.edu 412686Sksewell@umich.eduuint64_t 422686Sksewell@umich.eduMipsISA::fpConvert(ConvertType cvt_type, double fp_val) 432686Sksewell@umich.edu{ 442686Sksewell@umich.edu 452686Sksewell@umich.edu switch (cvt_type) 462686Sksewell@umich.edu { 472686Sksewell@umich.edu case SINGLE_TO_DOUBLE: 482686Sksewell@umich.edu { 492686Sksewell@umich.edu double sdouble_val = fp_val; 502686Sksewell@umich.edu void *sdouble_ptr = &sdouble_val; 512686Sksewell@umich.edu uint64_t sdp_bits = *(uint64_t *) sdouble_ptr; 522686Sksewell@umich.edu return sdp_bits; 532686Sksewell@umich.edu } 542686Sksewell@umich.edu 552686Sksewell@umich.edu case SINGLE_TO_WORD: 562686Sksewell@umich.edu { 572686Sksewell@umich.edu int32_t sword_val = (int32_t) fp_val; 582686Sksewell@umich.edu void *sword_ptr = &sword_val; 592686Sksewell@umich.edu uint64_t sword_bits= *(uint32_t *) sword_ptr; 602686Sksewell@umich.edu return sword_bits; 612686Sksewell@umich.edu } 622686Sksewell@umich.edu 632686Sksewell@umich.edu case WORD_TO_SINGLE: 642686Sksewell@umich.edu { 652686Sksewell@umich.edu float wfloat_val = fp_val; 662686Sksewell@umich.edu void *wfloat_ptr = &wfloat_val; 672686Sksewell@umich.edu uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr; 682686Sksewell@umich.edu return wfloat_bits; 692686Sksewell@umich.edu } 702686Sksewell@umich.edu 712686Sksewell@umich.edu case WORD_TO_DOUBLE: 722686Sksewell@umich.edu { 732686Sksewell@umich.edu double wdouble_val = fp_val; 742686Sksewell@umich.edu void *wdouble_ptr = &wdouble_val; 752686Sksewell@umich.edu uint64_t wdp_bits = *(uint64_t *) wdouble_ptr; 762686Sksewell@umich.edu return wdp_bits; 772686Sksewell@umich.edu } 782686Sksewell@umich.edu 792686Sksewell@umich.edu default: 802686Sksewell@umich.edu panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type); 812686Sksewell@umich.edu return 0; 822686Sksewell@umich.edu } 832686Sksewell@umich.edu} 842686Sksewell@umich.edu 852686Sksewell@umich.edudouble 862686Sksewell@umich.eduMipsISA::roundFP(double val, int digits) 872686Sksewell@umich.edu{ 882686Sksewell@umich.edu double digit_offset = pow(10.0,digits); 892686Sksewell@umich.edu val = val * digit_offset; 902686Sksewell@umich.edu val = val + 0.5; 912686Sksewell@umich.edu val = floor(val); 922686Sksewell@umich.edu val = val / digit_offset; 932686Sksewell@umich.edu return val; 942686Sksewell@umich.edu} 952686Sksewell@umich.edu 962686Sksewell@umich.edudouble 972686Sksewell@umich.eduMipsISA::truncFP(double val) 982686Sksewell@umich.edu{ 992686Sksewell@umich.edu int trunc_val = (int) val; 1002686Sksewell@umich.edu return (double) trunc_val; 1012686Sksewell@umich.edu} 1022686Sksewell@umich.edu 1032686Sksewell@umich.edubool 1042686Sksewell@umich.eduMipsISA::getCondCode(uint32_t fcsr, int cc_idx) 1052686Sksewell@umich.edu{ 1062686Sksewell@umich.edu int shift = (cc_idx == 0) ? 23 : cc_idx + 24; 1072686Sksewell@umich.edu bool cc_val = (fcsr >> shift) & 0x00000001; 1082686Sksewell@umich.edu return cc_val; 1092686Sksewell@umich.edu} 1102686Sksewell@umich.edu 1112686Sksewell@umich.eduuint32_t 1122686Sksewell@umich.eduMipsISA::genCCVector(uint32_t fcsr, int cc_num, uint32_t cc_val) 1132686Sksewell@umich.edu{ 1142686Sksewell@umich.edu int cc_idx = (cc_num == 0) ? 23 : cc_num + 24; 1152686Sksewell@umich.edu 1162686Sksewell@umich.edu fcsr = bits(fcsr, 31, cc_idx + 1) << cc_idx + 1 | 1172686Sksewell@umich.edu cc_val << cc_idx | 1182686Sksewell@umich.edu bits(fcsr, cc_idx - 1, 0); 1192686Sksewell@umich.edu 1202686Sksewell@umich.edu return fcsr; 1212686Sksewell@umich.edu} 1222686Sksewell@umich.edu 1232686Sksewell@umich.eduuint32_t 1242686Sksewell@umich.eduMipsISA::genInvalidVector(uint32_t fcsr_bits) 1252686Sksewell@umich.edu{ 1262686Sksewell@umich.edu //Set FCSR invalid in "flag" field 1272686Sksewell@umich.edu int invalid_offset = Invalid + Flag_Field; 1282686Sksewell@umich.edu fcsr_bits = fcsr_bits | (1 << invalid_offset); 1292686Sksewell@umich.edu 1302686Sksewell@umich.edu //Set FCSR invalid in "cause" flag 1312686Sksewell@umich.edu int cause_offset = Invalid + Cause_Field; 1322686Sksewell@umich.edu fcsr_bits = fcsr_bits | (1 << cause_offset); 1332686Sksewell@umich.edu 1342686Sksewell@umich.edu return fcsr_bits; 1352686Sksewell@umich.edu} 1362686Sksewell@umich.edu 1372686Sksewell@umich.edubool 1382686Sksewell@umich.eduMipsISA::isNan(void *val_ptr, int size) 1392686Sksewell@umich.edu{ 1402686Sksewell@umich.edu switch (size) 1412686Sksewell@umich.edu { 1422686Sksewell@umich.edu case 32: 1432686Sksewell@umich.edu { 1442686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1452686Sksewell@umich.edu return (bits(val_bits, 30, 23) == 0xFF); 1462686Sksewell@umich.edu } 1472686Sksewell@umich.edu 1482686Sksewell@umich.edu case 64: 1492686Sksewell@umich.edu { 1502686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1512686Sksewell@umich.edu return (bits(val_bits, 62, 52) == 0x7FF); 1522686Sksewell@umich.edu } 1532686Sksewell@umich.edu 1542686Sksewell@umich.edu default: 1552686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 1562686Sksewell@umich.edu } 1572686Sksewell@umich.edu} 1582686Sksewell@umich.edu 1592686Sksewell@umich.edu 1602686Sksewell@umich.edubool 1612686Sksewell@umich.eduMipsISA::isQnan(void *val_ptr, int size) 1622686Sksewell@umich.edu{ 1632686Sksewell@umich.edu switch (size) 1642686Sksewell@umich.edu { 1652686Sksewell@umich.edu case 32: 1662686Sksewell@umich.edu { 1672686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1682686Sksewell@umich.edu return (bits(val_bits, 30, 22) == 0x1FE); 1692686Sksewell@umich.edu } 1702686Sksewell@umich.edu 1712686Sksewell@umich.edu case 64: 1722686Sksewell@umich.edu { 1732686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1742686Sksewell@umich.edu return (bits(val_bits, 62, 51) == 0xFFE); 1752686Sksewell@umich.edu } 1762686Sksewell@umich.edu 1772686Sksewell@umich.edu default: 1782686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 1792686Sksewell@umich.edu } 1802686Sksewell@umich.edu} 1812686Sksewell@umich.edu 1822686Sksewell@umich.edubool 1832686Sksewell@umich.eduMipsISA::isSnan(void *val_ptr, int size) 1842686Sksewell@umich.edu{ 1852686Sksewell@umich.edu switch (size) 1862686Sksewell@umich.edu { 1872686Sksewell@umich.edu case 32: 1882686Sksewell@umich.edu { 1892686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1902686Sksewell@umich.edu return (bits(val_bits, 30, 22) == 0x1FF); 1912686Sksewell@umich.edu } 1922686Sksewell@umich.edu 1932686Sksewell@umich.edu case 64: 1942686Sksewell@umich.edu { 1952686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1962686Sksewell@umich.edu return (bits(val_bits, 62, 51) == 0xFFF); 1972686Sksewell@umich.edu } 1982686Sksewell@umich.edu 1992686Sksewell@umich.edu default: 2002686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 2012686Sksewell@umich.edu } 2022686Sksewell@umich.edu} 203