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usr / src / contrib / llvm-project / compiler-rt / lib / builtins / i386 /

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📄 ashldi3.S(1.79 KB)
📄 ashrdi3.S(1.92 KB)
📄 chkstk.S(825 B)
📄 chkstk2.S(1.38 KB)
📄 divdi3.S(5.02 KB)
📄 floatdidf.S(1010 B)
📄 floatdisf.S(1.05 KB)
📄 floatdixf.S(1.03 KB)
📄 floatundidf.S(1.37 KB)
📄 floatundisf.S(2.69 KB)
📄 floatundixf.S(1.01 KB)
📄 fp_mode.c(1.14 KB)
📄 lshrdi3.S(1.79 KB)
📄 moddi3.S(5.08 KB)
📄 muldi3.S(751 B)
📄 udivdi3.S(3.52 KB)
📄 umoddi3.S(3.73 KB)

Editing: fp_mode.c

//===----- lib/i386/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 X87_TONEAREST  0x0000
#define X87_DOWNWARD   0x0400
#define X87_UPWARD     0x0800
#define X87_TOWARDZERO 0x0c00
#define X87_RMODE_MASK (X87_TONEAREST | X87_UPWARD | X87_DOWNWARD | X87_TOWARDZERO)

FE_ROUND_MODE __fe_getround() {
  // Assume that the rounding mode state for the fpu agrees with the SSE unit.
  unsigned short cw;
  __asm__ __volatile__ ("fnstcw %0" : "=m" (cw));

switch (cw & X87_RMODE_MASK) {
    case X87_TONEAREST:
      return FE_TONEAREST;
    case X87_DOWNWARD:
      return FE_DOWNWARD;
    case X87_UPWARD:
      return FE_UPWARD;
    case X87_TOWARDZERO:
      return FE_TOWARDZERO;
  }
  return FE_TONEAREST;
}

int __fe_raise_inexact() {
  float f = 1.0f, g = 3.0f;
  __asm__ __volatile__ ("fdivs %1" : "+t" (f) : "m" (g));
  return 0;
}

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Editing: fp_mode.c

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