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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/* Fused multiply-add of double values, narrowing the result to float,
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using soft-fp.
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Copyright (C) 2021-2022 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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#define f32fmaf64 __hide_f32fmaf64
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#define f32fmaf32x __hide_f32fmaf32x
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#define ffmal __hide_ffmal
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#include <math.h>
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#undef f32fmaf64
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#undef f32fmaf32x
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#undef ffmal
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#include <math-narrow.h>
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#include <libc-diag.h>
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/* R_e is not set in cases where it is not used in packing, but the
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compiler does not see that it is set in all cases where it is
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used, resulting in warnings that it may be used uninitialized.
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The location of the warning differs in different versions of GCC,
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it may be where R is defined using a macro or it may be where the
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macro is defined. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmaybe-uninitialized");
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#include <soft-fp.h>
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#include <single.h>
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#include <double.h>
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float
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__ffma (double x, double y, double z)
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{
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FP_DECL_EX;
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FP_DECL_D (X);
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FP_DECL_D (Y);
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FP_DECL_D (Z);
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FP_DECL_D (R);
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FP_DECL_S (RN);
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float ret;
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FP_INIT_ROUNDMODE;
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FP_UNPACK_D (X, x);
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FP_UNPACK_D (Y, y);
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FP_UNPACK_D (Z, z);
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FP_FMA_D (R, X, Y, Z);
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#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D
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FP_TRUNC_COOKED (S, D, 1, 2, RN, R);
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#else
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FP_TRUNC_COOKED (S, D, 1, 1, RN, R);
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#endif
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FP_PACK_S (ret, RN);
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FP_HANDLE_EXCEPTIONS;
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CHECK_NARROW_FMA (ret, x, y, z);
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return ret;
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}
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DIAG_POP_NEEDS_COMMENT;
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libm_alias_float_double (fma)
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