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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/* Divide double values, narrowing the result to float, using soft-fp.
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Copyright (C) 2018-2025 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 f32divf64 __hide_f32divf64
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#define f32divf32x __hide_f32divf32x
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#define fdivl __hide_fdivl
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#include <math.h>
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#undef f32divf64
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#undef f32divf32x
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#undef fdivl
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#include <math-narrow.h>
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#include <libc-diag.h>
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/* R_f[01] are not set in cases where they are not used in packing,
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but the compiler does not see that they are set in all cases where
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they are used, resulting in warnings that they may be used
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uninitialized. The location of the warning differs in different
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versions of GCC, it may be where R is defined using a macro or it
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may be where the macro is defined. This happens only with -O1. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (8, "-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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__fdiv (double x, double y)
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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 (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_DIV_D (R, X, Y);
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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_DIV (ret, x, y);
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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 (div)
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