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