1*bdd1243dSDimitry Andric //=== lib/builtins/riscv/fp_mode.c - Floaing-point mode utilities -*- C -*-===// 2*bdd1243dSDimitry Andric // 3*bdd1243dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bdd1243dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bdd1243dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bdd1243dSDimitry Andric // 7*bdd1243dSDimitry Andric //===----------------------------------------------------------------------===// 8*bdd1243dSDimitry Andric #include "../fp_mode.h" 9*bdd1243dSDimitry Andric 10*bdd1243dSDimitry Andric #define RISCV_TONEAREST 0x0 11*bdd1243dSDimitry Andric #define RISCV_TOWARDZERO 0x1 12*bdd1243dSDimitry Andric #define RISCV_DOWNWARD 0x2 13*bdd1243dSDimitry Andric #define RISCV_UPWARD 0x3 14*bdd1243dSDimitry Andric 15*bdd1243dSDimitry Andric #define RISCV_INEXACT 0x1 16*bdd1243dSDimitry Andric 17*bdd1243dSDimitry Andric CRT_FE_ROUND_MODE __fe_getround(void) { 18*bdd1243dSDimitry Andric #if defined(__riscv_f) 19*bdd1243dSDimitry Andric int frm; 20*bdd1243dSDimitry Andric __asm__ __volatile__("frrm %0" : "=r" (frm)); 21*bdd1243dSDimitry Andric switch (frm) { 22*bdd1243dSDimitry Andric case RISCV_TOWARDZERO: 23*bdd1243dSDimitry Andric return CRT_FE_TOWARDZERO; 24*bdd1243dSDimitry Andric case RISCV_DOWNWARD: 25*bdd1243dSDimitry Andric return CRT_FE_DOWNWARD; 26*bdd1243dSDimitry Andric case RISCV_UPWARD: 27*bdd1243dSDimitry Andric return CRT_FE_UPWARD; 28*bdd1243dSDimitry Andric case RISCV_TONEAREST: 29*bdd1243dSDimitry Andric default: 30*bdd1243dSDimitry Andric return CRT_FE_TONEAREST; 31*bdd1243dSDimitry Andric } 32*bdd1243dSDimitry Andric #else 33*bdd1243dSDimitry Andric return CRT_FE_TONEAREST; 34*bdd1243dSDimitry Andric #endif 35*bdd1243dSDimitry Andric } 36*bdd1243dSDimitry Andric 37*bdd1243dSDimitry Andric int __fe_raise_inexact(void) { 38*bdd1243dSDimitry Andric #if defined(__riscv_f) 39*bdd1243dSDimitry Andric __asm__ __volatile__("csrsi fflags, %0" :: "i" (RISCV_INEXACT)); 40*bdd1243dSDimitry Andric #endif 41*bdd1243dSDimitry Andric return 0; 42*bdd1243dSDimitry Andric } 43