URL
https://opencores.org/ocsvn/neorv32/neorv32/trunk
Subversion Repositories neorv32
[/] [neorv32/] [trunk/] [sw/] [example/] [coremark/] [cvt.c] - Rev 67
Go to most recent revision | Compare with Previous | Blame | View Log
/* Copyright 2018 Embedded Microprocessor Benchmark Consortium (EEMBC) Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ #include <math.h> #define CVTBUFSIZE 80 static char CVTBUF[CVTBUFSIZE]; static char * cvt(double arg, int ndigits, int *decpt, int *sign, char *buf, int eflag) { int r2; double fi, fj; char * p, *p1; if (ndigits < 0) ndigits = 0; if (ndigits >= CVTBUFSIZE - 1) ndigits = CVTBUFSIZE - 2; r2 = 0; *sign = 0; p = &buf[0]; if (arg < 0) { *sign = 1; arg = -arg; } arg = modf(arg, &fi); p1 = &buf[CVTBUFSIZE]; if (fi != 0) { p1 = &buf[CVTBUFSIZE]; while (fi != 0) { fj = modf(fi / 10, &fi); *--p1 = (int)((fj + .03) * 10) + '0'; r2++; } while (p1 < &buf[CVTBUFSIZE]) *p++ = *p1++; } else if (arg > 0) { while ((fj = arg * 10) < 1) { arg = fj; r2--; } } p1 = &buf[ndigits]; if (eflag == 0) p1 += r2; *decpt = r2; if (p1 < &buf[0]) { buf[0] = '\0'; return buf; } while (p <= p1 && p < &buf[CVTBUFSIZE]) { arg *= 10; arg = modf(arg, &fj); *p++ = (int)fj + '0'; } if (p1 >= &buf[CVTBUFSIZE]) { buf[CVTBUFSIZE - 1] = '\0'; return buf; } p = p1; *p1 += 5; while (*p1 > '9') { *p1 = '0'; if (p1 > buf) ++*--p1; else { *p1 = '1'; (*decpt)++; if (eflag == 0) { if (p > buf) *p = '0'; p++; } } } *p = '\0'; return buf; } char * ecvt(double arg, int ndigits, int *decpt, int *sign) { return cvt(arg, ndigits, decpt, sign, CVTBUF, 1); } char * ecvtbuf(double arg, int ndigits, int *decpt, int *sign, char *buf) { return cvt(arg, ndigits, decpt, sign, buf, 1); } char * fcvt(double arg, int ndigits, int *decpt, int *sign) { return cvt(arg, ndigits, decpt, sign, CVTBUF, 0); } char * fcvtbuf(double arg, int ndigits, int *decpt, int *sign, char *buf) { return cvt(arg, ndigits, decpt, sign, buf, 0); }
Go to most recent revision | Compare with Previous | Blame | View Log