cregit-Linux how code gets into the kernel

Release 4.14 arch/mips/math-emu/sp_rint.c

/* IEEE754 floating point arithmetic
 * single precision
 */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 * Copyright (C) 2017 Imagination Technologies, Ltd.
 * Author: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program.
 */

#include "ieee754sp.h"


union ieee754sp ieee754sp_rint(union ieee754sp x) { union ieee754sp ret; u32 residue; int sticky; int round; int odd; COMPXDP; /* <-- DP needed for 64-bit mantissa tmp */ ieee754_clearcx(); EXPLODEXSP; FLUSHXSP; if (xc == IEEE754_CLASS_SNAN) return ieee754sp_nanxcpt(x); if ((xc == IEEE754_CLASS_QNAN) || (xc == IEEE754_CLASS_INF) || (xc == IEEE754_CLASS_ZERO)) return x; if (xe >= SP_FBITS) return x; if (xe < -1) { residue = xm; round = 0; sticky = residue != 0; xm = 0; } else { residue = xm << (xe + 1); residue <<= 31 - SP_FBITS; round = (residue >> 31) != 0; sticky = (residue << 1) != 0; xm >>= SP_FBITS - xe; } odd = (xm & 0x1) != 0x0; switch (ieee754_csr.rm) { case FPU_CSR_RN: /* toward nearest */ if (round && (sticky || odd)) xm++; break; case FPU_CSR_RZ: /* toward zero */ break; case FPU_CSR_RU: /* toward +infinity */ if ((round || sticky) && !xs) xm++; break; case FPU_CSR_RD: /* toward -infinity */ if ((round || sticky) && xs) xm++; break; } if (round || sticky) ieee754_setcx(IEEE754_INEXACT); ret = ieee754sp_flong(xm); SPSIGN(ret) = xs; return ret; }

Contributors

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Aleksandar Markovic258100.00%1100.00%
Total258100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Aleksandar Markovic263100.00%1100.00%
Total263100.00%1100.00%
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