1 /*- 2 * Copyright (c) 2020 Axiado 3 * All rights reserved. 4 * 5 * This software was developed by Kristof Provost under 6 * sponsorship from Axiado. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/types.h> 32 #include <ieeefp.h> 33 34 /** 35 * RISC-V doesn't support floating-point exceptions: RISC-V Instruction Set 36 * Manual: Volume I: User-Level ISA, 11.2 Floating-Point Control and Status 37 * Register: "As allowed by the standard, we do not support traps on 38 * floating-point exceptions in the base ISA, but instead require explicit 39 * checks of the flags in software. We considered adding branches controlled 40 * directly by the contents of the floating-point accrued exception flags, but 41 * ultimately chose to omit these instructions to keep the ISA simple." 42 * 43 * We still need this function, because some applications (notably Perl) call 44 * it, but we cannot provide a meaningful implementation. 45 **/ 46 fp_except_t 47 fpsetmask(fp_except_t mask) 48 { 49 50 return (0); 51 } 52