From e713a2edb0839995af01d6f57cfe9c886c95f99e Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Thu, 24 Apr 2025 11:09:52 +0200 Subject: riscv: add fenv support from glibc --- libm/riscv32/fesetmode.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 libm/riscv32/fesetmode.c (limited to 'libm/riscv32/fesetmode.c') diff --git a/libm/riscv32/fesetmode.c b/libm/riscv32/fesetmode.c new file mode 100644 index 000000000..aaaf4480b --- /dev/null +++ b/libm/riscv32/fesetmode.c @@ -0,0 +1,30 @@ +/* Install given floating-point control modes. RISC-V version. + Copyright (C) 2017-2025 Free Software Foundation, Inc. + + 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 + . */ + +#include +#include + +int +fesetmode (const femode_t *modep) +{ + __asm__ volatile ("csrc fcsr, %0" : : "r" (~FE_ALL_EXCEPT)); + + if (modep != FE_DFL_MODE) + __asm__ volatile ("csrs fcsr, %0" : : "r" (*modep & ~FE_ALL_EXCEPT)); + + return 0; +} -- cgit v1.2.3