| //=== lib/builtins/loongarch/fp_mode.c - Floaing-point mode utilities -*- C -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| #include "../fp_mode.h" |
| |
| #define LOONGARCH_TONEAREST 0x0000 |
| #define LOONGARCH_TOWARDZERO 0x0100 |
| #define LOONGARCH_UPWARD 0x0200 |
| #define LOONGARCH_DOWNWARD 0x0300 |
| |
| #define LOONGARCH_RMODE_MASK (LOONGARCH_TONEAREST | LOONGARCH_TOWARDZERO | \ |
| LOONGARCH_UPWARD | LOONGARCH_DOWNWARD) |
| |
| #define LOONGARCH_INEXACT 0x10000 |
| |
| CRT_FE_ROUND_MODE __fe_getround(void) { |
| #if __loongarch_frlen != 0 |
| int fcsr; |
| __asm__ __volatile__("movfcsr2gr %0, $fcsr0" : "=r" (fcsr)); |
| fcsr &= LOONGARCH_RMODE_MASK; |
| switch (fcsr) { |
| case LOONGARCH_TOWARDZERO: |
| return CRT_FE_TOWARDZERO; |
| case LOONGARCH_DOWNWARD: |
| return CRT_FE_DOWNWARD; |
| case LOONGARCH_UPWARD: |
| return CRT_FE_UPWARD; |
| case LOONGARCH_TONEAREST: |
| default: |
| return CRT_FE_TONEAREST; |
| } |
| #else |
| return CRT_FE_TONEAREST; |
| #endif |
| } |
| |
| int __fe_raise_inexact(void) { |
| #if __loongarch_frlen != 0 |
| int fcsr; |
| __asm__ __volatile__("movfcsr2gr %0, $fcsr0" : "=r" (fcsr)); |
| __asm__ __volatile__( |
| "movgr2fcsr $fcsr0, %0" :: "r" (fcsr | LOONGARCH_INEXACT)); |
| #endif |
| return 0; |
| } |