1*810390e3Srobert //=== lib/builtins/riscv/fp_mode.c - Floaing-point mode utilities -*- C -*-===// 2*810390e3Srobert // 3*810390e3Srobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*810390e3Srobert // See https://llvm.org/LICENSE.txt for license information. 5*810390e3Srobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*810390e3Srobert // 7*810390e3Srobert //===----------------------------------------------------------------------===// 8*810390e3Srobert #include "../fp_mode.h" 9*810390e3Srobert 10*810390e3Srobert #define RISCV_TONEAREST 0x0 11*810390e3Srobert #define RISCV_TOWARDZERO 0x1 12*810390e3Srobert #define RISCV_DOWNWARD 0x2 13*810390e3Srobert #define RISCV_UPWARD 0x3 14*810390e3Srobert 15*810390e3Srobert #define RISCV_INEXACT 0x1 16*810390e3Srobert __fe_getround(void)17*810390e3SrobertCRT_FE_ROUND_MODE __fe_getround(void) { 18*810390e3Srobert #if defined(__riscv_f) 19*810390e3Srobert int frm; 20*810390e3Srobert __asm__ __volatile__("frrm %0" : "=r" (frm)); 21*810390e3Srobert switch (frm) { 22*810390e3Srobert case RISCV_TOWARDZERO: 23*810390e3Srobert return CRT_FE_TOWARDZERO; 24*810390e3Srobert case RISCV_DOWNWARD: 25*810390e3Srobert return CRT_FE_DOWNWARD; 26*810390e3Srobert case RISCV_UPWARD: 27*810390e3Srobert return CRT_FE_UPWARD; 28*810390e3Srobert case RISCV_TONEAREST: 29*810390e3Srobert default: 30*810390e3Srobert return CRT_FE_TONEAREST; 31*810390e3Srobert } 32*810390e3Srobert #else 33*810390e3Srobert return CRT_FE_TONEAREST; 34*810390e3Srobert #endif 35*810390e3Srobert } 36*810390e3Srobert __fe_raise_inexact(void)37*810390e3Srobertint __fe_raise_inexact(void) { 38*810390e3Srobert #if defined(__riscv_f) 39*810390e3Srobert __asm__ __volatile__("csrsi fflags, %0" :: "i" (RISCV_INEXACT)); 40*810390e3Srobert #endif 41*810390e3Srobert return 0; 42*810390e3Srobert } 43