utility.cc revision 2980
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 312980Sgblack@eecs.umich.edu#include "arch/mips/regfile.hh" 322686Sksewell@umich.edu#include "arch/mips/utility.hh" 332980Sgblack@eecs.umich.edu#include "base/misc.hh" 342686Sksewell@umich.edu#include "base/bitfield.hh" 352686Sksewell@umich.edu 362686Sksewell@umich.eduusing namespace MipsISA; 372686Sksewell@umich.edu 382686Sksewell@umich.eduuint64_t 392686Sksewell@umich.eduMipsISA::fpConvert(ConvertType cvt_type, double fp_val) 402686Sksewell@umich.edu{ 412686Sksewell@umich.edu 422686Sksewell@umich.edu switch (cvt_type) 432686Sksewell@umich.edu { 442686Sksewell@umich.edu case SINGLE_TO_DOUBLE: 452686Sksewell@umich.edu { 462686Sksewell@umich.edu double sdouble_val = fp_val; 472686Sksewell@umich.edu void *sdouble_ptr = &sdouble_val; 482686Sksewell@umich.edu uint64_t sdp_bits = *(uint64_t *) sdouble_ptr; 492686Sksewell@umich.edu return sdp_bits; 502686Sksewell@umich.edu } 512686Sksewell@umich.edu 522686Sksewell@umich.edu case SINGLE_TO_WORD: 532686Sksewell@umich.edu { 542686Sksewell@umich.edu int32_t sword_val = (int32_t) fp_val; 552686Sksewell@umich.edu void *sword_ptr = &sword_val; 562686Sksewell@umich.edu uint64_t sword_bits= *(uint32_t *) sword_ptr; 572686Sksewell@umich.edu return sword_bits; 582686Sksewell@umich.edu } 592686Sksewell@umich.edu 602686Sksewell@umich.edu case WORD_TO_SINGLE: 612686Sksewell@umich.edu { 622686Sksewell@umich.edu float wfloat_val = fp_val; 632686Sksewell@umich.edu void *wfloat_ptr = &wfloat_val; 642686Sksewell@umich.edu uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr; 652686Sksewell@umich.edu return wfloat_bits; 662686Sksewell@umich.edu } 672686Sksewell@umich.edu 682686Sksewell@umich.edu case WORD_TO_DOUBLE: 692686Sksewell@umich.edu { 702686Sksewell@umich.edu double wdouble_val = fp_val; 712686Sksewell@umich.edu void *wdouble_ptr = &wdouble_val; 722686Sksewell@umich.edu uint64_t wdp_bits = *(uint64_t *) wdouble_ptr; 732686Sksewell@umich.edu return wdp_bits; 742686Sksewell@umich.edu } 752686Sksewell@umich.edu 762686Sksewell@umich.edu default: 772686Sksewell@umich.edu panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type); 782686Sksewell@umich.edu return 0; 792686Sksewell@umich.edu } 802686Sksewell@umich.edu} 812686Sksewell@umich.edu 822686Sksewell@umich.edudouble 832686Sksewell@umich.eduMipsISA::roundFP(double val, int digits) 842686Sksewell@umich.edu{ 852686Sksewell@umich.edu double digit_offset = pow(10.0,digits); 862686Sksewell@umich.edu val = val * digit_offset; 872686Sksewell@umich.edu val = val + 0.5; 882686Sksewell@umich.edu val = floor(val); 892686Sksewell@umich.edu val = val / digit_offset; 902686Sksewell@umich.edu return val; 912686Sksewell@umich.edu} 922686Sksewell@umich.edu 932686Sksewell@umich.edudouble 942686Sksewell@umich.eduMipsISA::truncFP(double val) 952686Sksewell@umich.edu{ 962686Sksewell@umich.edu int trunc_val = (int) val; 972686Sksewell@umich.edu return (double) trunc_val; 982686Sksewell@umich.edu} 992686Sksewell@umich.edu 1002686Sksewell@umich.edubool 1012686Sksewell@umich.eduMipsISA::getCondCode(uint32_t fcsr, int cc_idx) 1022686Sksewell@umich.edu{ 1032686Sksewell@umich.edu int shift = (cc_idx == 0) ? 23 : cc_idx + 24; 1042686Sksewell@umich.edu bool cc_val = (fcsr >> shift) & 0x00000001; 1052686Sksewell@umich.edu return cc_val; 1062686Sksewell@umich.edu} 1072686Sksewell@umich.edu 1082686Sksewell@umich.eduuint32_t 1092686Sksewell@umich.eduMipsISA::genCCVector(uint32_t fcsr, int cc_num, uint32_t cc_val) 1102686Sksewell@umich.edu{ 1112686Sksewell@umich.edu int cc_idx = (cc_num == 0) ? 23 : cc_num + 24; 1122686Sksewell@umich.edu 1132686Sksewell@umich.edu fcsr = bits(fcsr, 31, cc_idx + 1) << cc_idx + 1 | 1142686Sksewell@umich.edu cc_val << cc_idx | 1152686Sksewell@umich.edu bits(fcsr, cc_idx - 1, 0); 1162686Sksewell@umich.edu 1172686Sksewell@umich.edu return fcsr; 1182686Sksewell@umich.edu} 1192686Sksewell@umich.edu 1202686Sksewell@umich.eduuint32_t 1212686Sksewell@umich.eduMipsISA::genInvalidVector(uint32_t fcsr_bits) 1222686Sksewell@umich.edu{ 1232686Sksewell@umich.edu //Set FCSR invalid in "flag" field 1242686Sksewell@umich.edu int invalid_offset = Invalid + Flag_Field; 1252686Sksewell@umich.edu fcsr_bits = fcsr_bits | (1 << invalid_offset); 1262686Sksewell@umich.edu 1272686Sksewell@umich.edu //Set FCSR invalid in "cause" flag 1282686Sksewell@umich.edu int cause_offset = Invalid + Cause_Field; 1292686Sksewell@umich.edu fcsr_bits = fcsr_bits | (1 << cause_offset); 1302686Sksewell@umich.edu 1312686Sksewell@umich.edu return fcsr_bits; 1322686Sksewell@umich.edu} 1332686Sksewell@umich.edu 1342686Sksewell@umich.edubool 1352686Sksewell@umich.eduMipsISA::isNan(void *val_ptr, int size) 1362686Sksewell@umich.edu{ 1372686Sksewell@umich.edu switch (size) 1382686Sksewell@umich.edu { 1392686Sksewell@umich.edu case 32: 1402686Sksewell@umich.edu { 1412686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1422686Sksewell@umich.edu return (bits(val_bits, 30, 23) == 0xFF); 1432686Sksewell@umich.edu } 1442686Sksewell@umich.edu 1452686Sksewell@umich.edu case 64: 1462686Sksewell@umich.edu { 1472686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1482686Sksewell@umich.edu return (bits(val_bits, 62, 52) == 0x7FF); 1492686Sksewell@umich.edu } 1502686Sksewell@umich.edu 1512686Sksewell@umich.edu default: 1522686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 1532686Sksewell@umich.edu } 1542686Sksewell@umich.edu} 1552686Sksewell@umich.edu 1562686Sksewell@umich.edu 1572686Sksewell@umich.edubool 1582686Sksewell@umich.eduMipsISA::isQnan(void *val_ptr, int size) 1592686Sksewell@umich.edu{ 1602686Sksewell@umich.edu switch (size) 1612686Sksewell@umich.edu { 1622686Sksewell@umich.edu case 32: 1632686Sksewell@umich.edu { 1642686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1652686Sksewell@umich.edu return (bits(val_bits, 30, 22) == 0x1FE); 1662686Sksewell@umich.edu } 1672686Sksewell@umich.edu 1682686Sksewell@umich.edu case 64: 1692686Sksewell@umich.edu { 1702686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1712686Sksewell@umich.edu return (bits(val_bits, 62, 51) == 0xFFE); 1722686Sksewell@umich.edu } 1732686Sksewell@umich.edu 1742686Sksewell@umich.edu default: 1752686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 1762686Sksewell@umich.edu } 1772686Sksewell@umich.edu} 1782686Sksewell@umich.edu 1792686Sksewell@umich.edubool 1802686Sksewell@umich.eduMipsISA::isSnan(void *val_ptr, int size) 1812686Sksewell@umich.edu{ 1822686Sksewell@umich.edu switch (size) 1832686Sksewell@umich.edu { 1842686Sksewell@umich.edu case 32: 1852686Sksewell@umich.edu { 1862686Sksewell@umich.edu uint32_t val_bits = *(uint32_t *) val_ptr; 1872686Sksewell@umich.edu return (bits(val_bits, 30, 22) == 0x1FF); 1882686Sksewell@umich.edu } 1892686Sksewell@umich.edu 1902686Sksewell@umich.edu case 64: 1912686Sksewell@umich.edu { 1922686Sksewell@umich.edu uint64_t val_bits = *(uint64_t *) val_ptr; 1932686Sksewell@umich.edu return (bits(val_bits, 62, 51) == 0xFFF); 1942686Sksewell@umich.edu } 1952686Sksewell@umich.edu 1962686Sksewell@umich.edu default: 1972686Sksewell@umich.edu panic("Type unsupported. Size mismatch\n"); 1982686Sksewell@umich.edu } 1992686Sksewell@umich.edu} 200