From 041cdc2769407c4d3869b218ad7ee7638e1c306e Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Wed, 24 May 2017 20:49:02 +0200 Subject: sparc64: add basic support No NPTL, no LDSO support. Bootup with Busybox Ash in Qemu working. Testuite shows only two failures, but mksh continue/break support doesn't work. --- libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c | 79 +++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c (limited to 'libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c') diff --git a/libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c b/libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c new file mode 100644 index 000000000..5b19d12a4 --- /dev/null +++ b/libc/sysdeps/linux/sparc64/soft-fp/e_ilogbl.c @@ -0,0 +1,79 @@ +/* Software floating-point emulation. + ilogbl(x, exp) + Copyright (C) 1999-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek (jj@ultra.linux.cz). + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +/* ilogbl(long double x) + * return the binary exponent of non-zero x + * ilogbl(0) = 0x80000001 + * ilogbl(inf/NaN) = 0x7fffffff (no signal is raised) + */ + +#include "soft-fp.h" +#include "quad.h" +#include + +int __ieee754_ilogbl (long double x) +{ + FP_DECL_EX; + FP_DECL_Q(X); + +/* + FP_UNPACK_Q(X, x); + switch (X_c) + { + case FP_CLS_ZERO: + return FP_ILOGB0; + case FP_CLS_NAN: + case FP_CLS_INF: + return FP_ILOGBNAN; + default: + return X_e; + } + */ + FP_UNPACK_RAW_Q(X, x); + switch (X_e) + { + default: + return X_e - _FP_EXPBIAS_Q; + case 0: +#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q + if (_FP_FRAC_ZEROP_4(X)) + return FP_ILOGB0; + else + { + _FP_I_TYPE shift; + _FP_FRAC_CLZ_4(shift, X); + shift -= _FP_FRACXBITS_Q; + return X_e - _FP_EXPBIAS_Q - 1 + shift; + } +#else + if (_FP_FRAC_ZEROP_2(X)) + return FP_ILOGB0; + else + { + _FP_I_TYPE shift; + _FP_FRAC_CLZ_2(shift, X); + shift -= _FP_FRACXBITS_Q; + return X_e - _FP_EXPBIAS_Q - 1 + shift; + } +#endif + case _FP_EXPBIAS_Q: + return FP_ILOGBNAN; + } +} -- cgit v1.2.3