From 089f8816df1cbcb0519083f72f3fd51a5072bd9a Mon Sep 17 00:00:00 2001 From: swcompiler Date: Fri, 29 Nov 2024 17:18:04 +0800 Subject: [PATCH 15/23] Sw64: Add get_rounding_mode --- sysdeps/sw_64/fpu/get-rounding-mode.h | 35 +++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 sysdeps/sw_64/fpu/get-rounding-mode.h diff --git a/sysdeps/sw_64/fpu/get-rounding-mode.h b/sysdeps/sw_64/fpu/get-rounding-mode.h new file mode 100644 index 00000000..d7fb29a2 --- /dev/null +++ b/sysdeps/sw_64/fpu/get-rounding-mode.h @@ -0,0 +1,35 @@ +/* Determine floating-point rounding mode within libc. Sw_64 version. + Copyright (C) 2012-2023 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 + . */ + +#ifndef SW_64_GET_ROUNDING_MODE_H +#define SW_64_GET_ROUNDING_MODE_H 1 + +#include +#include + +/* Return the floating-point rounding mode. */ + +static inline int +get_rounding_mode (void) +{ + unsigned long fpcr; + __asm__ __volatile__("excb; rfpcr %0" : "=f"(fpcr)); + return (fpcr >> FPCR_ROUND_SHIFT) & 3; +} + +#endif /* get-rounding-mode.h */ -- 2.25.1