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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/* Machine-dependent software floating-point definitions.
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Sparc64 userland (_Q_* and _Qp_*) version.
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Copyright (C) 1997-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <fpu_control.h>
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#include <fenv.h>
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#include <stdlib.h>
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#define _FP_W_TYPE_SIZE 64
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#define _FP_W_TYPE unsigned long
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#define _FP_WS_TYPE signed long
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#define _FP_I_TYPE long
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/* Helper macros for _FP_MUL_MEAT_2_120_240_double. */
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#define _FP_MUL_MEAT_SET_FE_TZ \
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do { \
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static fpu_control_t _fetz = _FPU_RC_DOWN; \
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_FPU_SETCW(_fetz); \
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} while (0)
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#ifndef _FP_MUL_MEAT_RESET_FE
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#define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw)
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#endif
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#define _FP_MUL_MEAT_S(R,X,Y) \
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_FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
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#define _FP_MUL_MEAT_D(R,X,Y) \
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_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_Q(R,X,Y) \
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_FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y, \
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_FP_MUL_MEAT_SET_FE_TZ, \
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_FP_MUL_MEAT_RESET_FE)
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#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1)
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
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#define _FP_NANSIGN_S 0
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#define _FP_NANSIGN_D 0
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#define _FP_NANSIGN_Q 0
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#define _FP_KEEPNANFRACP 1
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#define _FP_QNANNEGATEDP 0
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/* If one NaN is signaling and the other is not,
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* we choose that one, otherwise we choose Y.
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*/
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do { \
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if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \
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&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
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{ \
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R##_s = X##_s; \
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_FP_FRAC_COPY_##wc(R,X); \
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} \
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else \
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{ \
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R##_s = Y##_s; \
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_FP_FRAC_COPY_##wc(R,Y); \
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} \
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R##_c = FP_CLS_NAN; \
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} while (0)
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/* Obtain the current rounding mode. */
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#ifndef FP_ROUNDMODE
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#define FP_ROUNDMODE ((_fcw >> 30) & 0x3)
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#endif
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/* Exception flags. */
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#define FP_EX_INVALID (1 << 4)
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#define FP_EX_OVERFLOW (1 << 3)
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#define FP_EX_UNDERFLOW (1 << 2)
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#define FP_EX_DIVZERO (1 << 1)
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#define FP_EX_INEXACT (1 << 0)
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#define _FP_TININESS_AFTER_ROUNDING 0
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#define _FP_DECL_EX \
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fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30)
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#define FP_INIT_ROUNDMODE \
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do { \
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_FPU_GETCW(_fcw); \
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} while (0)
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#define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f)
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#define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex)
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/* Simulate exceptions using double arithmetics. */
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extern void __Qp_handle_exceptions(int exc);
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#define FP_HANDLE_EXCEPTIONS \
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do { \
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if (!_fex) \
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{ \
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/* This is the common case, so we do it inline. \
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* We need to clear cexc bits if any. \
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*/ \
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__asm__ __volatile__("fzero %%f62\n\t" \
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"faddd %%f62, %%f62, %%f62" \
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: : : "f62"); \
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} \
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else \
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{ \
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__Qp_handle_exceptions (_fex); \
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} \
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} while (0)
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#define QP_HANDLE_EXCEPTIONS(_a) \
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do { \
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if ((_fcw >> 23) & _fex) \
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{ \
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_a; \
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} \
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else \
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{ \
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_fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex; \
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_FPU_SETCW(_fcw); \
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} \
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} while (0)
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#define QP_NO_EXCEPTIONS \
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__asm ("fzero %%f62\n\t" \
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"faddd %%f62, %%f62, %%f62" : : : "f62")
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#define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62"
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#define QP_CLOBBER_CC QP_CLOBBER , "cc"
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