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The generic implementation is slight more optimized than the powerpc one, where it has a more optimized inf/nan check (by not using FP unit checks, along with branch prediction hints), and removed one branch by issuing trunc instead of a combination of floor/ceil (which also generated less code). On power10 with gcc 14.2.1: reciprocal-throughput master patch difference workload-0_1 1.1351 0.9067 20.12% workload-1_maxint 1.4230 0.9040 36.47% workload-maxint_maxfloat 1.5038 0.9076 39.65% workload-integral 1.1280 0.9111 19.23% latency master patch difference workload-0_1 1.1440 2.7117 -137.03% workload-1_maxint 4.0556 2.7070 33.25% workload-maxint_maxfloat 3.2122 2.7164 15.43% workload-integral 3.2381 2.7281 15.75% Checked on powerpc64le-linux-gnu. Reviewed-by: Sachin Monga <smonga@linux.ibm.com>
21 lines
910 B
C
21 lines
910 B
C
/* PowerPC/POWER5+ implementation for modf.
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Copyright (C) 2013-2025 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 __modf __modf_power5plus
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#include <sysdeps/ieee754/dbl-64/s_modf.c>
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