43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
//=== lib/builtins/riscv/fp_mode.c - Floaing-point mode utilities -*- C -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "../fp_mode.h"
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#define RISCV_TONEAREST 0x0
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#define RISCV_TOWARDZERO 0x1
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#define RISCV_DOWNWARD 0x2
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#define RISCV_UPWARD 0x3
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#define RISCV_INEXACT 0x1
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CRT_FE_ROUND_MODE __fe_getround(void) {
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#if defined(__riscv_f)
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int frm;
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__asm__ __volatile__("frrm %0" : "=r" (frm));
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switch (frm) {
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case RISCV_TOWARDZERO:
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return CRT_FE_TOWARDZERO;
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case RISCV_DOWNWARD:
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return CRT_FE_DOWNWARD;
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case RISCV_UPWARD:
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return CRT_FE_UPWARD;
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case RISCV_TONEAREST:
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default:
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return CRT_FE_TONEAREST;
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}
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#else
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return CRT_FE_TONEAREST;
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#endif
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}
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int __fe_raise_inexact(void) {
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#if defined(__riscv_f)
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__asm__ __volatile__("csrsi fflags, %0" :: "i" (RISCV_INEXACT));
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#endif
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return 0;
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}
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