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MIPSr6/math: Use builtin fma and fmaf

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MIPSr6 has MADDF.s/MADDF.d instructions, which are fused.

In MIPS ISA, double support can be subsetted.  Only FMAF is enabled
for this case.

	* sysdeps/mips/fpu/math-use-builtins-fma.h

Signed-off-by: YunQiang Su <syq@gcc.gnu.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
YunQiang Su 2024-06-21 00:07:56 +08:00 committed by Adhemerval Zanella
parent 018f0fc3b8
commit 9d0e9c8a13
1 changed files with 36 additions and 0 deletions
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sysdeps/mips/fpu/math-use-builtins-fma.h Normal file
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/* Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* MIPSr6 has MADDF.s/MADDF.d instructions, which are fused. In MIPS
ISA, double support can be subsetted. Only FMAF is enabled for this
case. */
#include <sysdep.h>
#if __mips_isa_rev >= 6
# ifdef __mips_single_float
# define USE_FMA_BUILTIN 0
# else
# define USE_FMA_BUILTIN 1
# endif
# define USE_FMAF_BUILTIN 1
#else
# define USE_FMA_BUILTIN 0
# define USE_FMAF_BUILTIN 0
#endif
#define USE_FMAL_BUILTIN 0
#define USE_FMAF128_BUILTIN 0