From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgcc/config/libbid/bid64_logb.c | 68 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 libgcc/config/libbid/bid64_logb.c (limited to 'libgcc/config/libbid/bid64_logb.c') diff --git a/libgcc/config/libbid/bid64_logb.c b/libgcc/config/libbid/bid64_logb.c new file mode 100644 index 000000000..eeb3fac2a --- /dev/null +++ b/libgcc/config/libbid/bid64_logb.c @@ -0,0 +1,68 @@ +/* Copyright (C) 2007, 2009 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +. */ + +#include "bid_internal.h" + +#define MAX_FORMAT_DIGITS 16 +#define DECIMAL_EXPONENT_BIAS 398 + +#if DECIMAL_CALL_BY_REFERENCE + +void +bid64_logb (int * pres, UINT64 * px + _EXC_FLAGS_PARAM _EXC_MASKS_PARAM _EXC_INFO_PARAM) { + UINT64 x; +#else + +int +bid64_logb (UINT64 x _EXC_FLAGS_PARAM _EXC_MASKS_PARAM _EXC_INFO_PARAM) { +#endif + UINT64 sign_x, coefficient_x; + int_double dx; + int exponent_x, bin_expon_cx, digits; + +#if DECIMAL_CALL_BY_REFERENCE + x = *px; +#endif + // unpack arguments, check for NaN or Infinity + if (!unpack_BID64 (&sign_x, &exponent_x, &coefficient_x, x)) { + // x is Inf. or NaN +#ifdef SET_STATUS_FLAGS + __set_status_flags (pfpsf, INVALID_EXCEPTION); +#endif + BID_RETURN (0x80000000); + } + // find number of digits in coefficient + if (coefficient_x >= 1000000000000000ull) { + digits = 16; + } else { + dx.d = (double)coefficient_x; // exact conversion; + bin_expon_cx = (int)(dx.i >> 52) - 1023; + digits = estimate_decimal_digits[bin_expon_cx]; + if (coefficient_x >= power10_table_128[digits].w[0]) + digits++; + } + exponent_x = exponent_x - DECIMAL_EXPONENT_BIAS + digits - 1; + + BID_RETURN (exponent_x); +} -- cgit v1.2.3