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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 1.5210 1.3942 8.34% workload-1_maxint 2.0926 1.3940 33.38% workload-maxint_maxfloat 1.7851 1.3940 21.91% workload-integral 1.5216 1.3941 8.37% latency master patch difference workload-0_1 1.5928 2.6337 -65.35% workload-1_maxint 3.2929 2.6337 20.02% workload-maxint_maxfloat 1.9697 2.6341 -33.73% workload-integral 2.0597 2.6337 -27.87% Checked on powerpc64le-linux-gnu. Reviewed-by: Sachin Monga <smonga@linux.ibm.com>
21 lines
914 B
C
21 lines
914 B
C
/* PowerPC/POWER5+ implementation for modff.
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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 __modff __modff_power5plus
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#include <sysdeps/ieee754/flt-32/s_modff.c>
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