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Current Path: /usr/src/contrib/llvm-project/compiler-rt/lib/builtins/ppc

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

📁 ..
📄 DD.h(1.12 KB)
📄 divtc3.c(3.23 KB)
📄 fixtfdi.c(3.29 KB)
📄 fixtfti.c(1.32 KB)
📄 fixunstfdi.c(1.94 KB)
📄 fixunstfti.c(4.58 KB)
📄 floatditf.c(1.02 KB)
📄 floattitf.c(1.97 KB)
📄 floatunditf.c(1.25 KB)
📄 gcc_qadd.c(1.88 KB)
📄 gcc_qdiv.c(1.25 KB)
📄 gcc_qmul.c(1.25 KB)
📄 gcc_qsub.c(1.88 KB)
📄 multc3.c(2.55 KB)
📄 restFP.S(1.44 KB)
📄 saveFP.S(1.33 KB)

Editing: gcc_qdiv.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

// long double __gcc_qdiv(long double x, long double y);
// This file implements the PowerPC 128-bit double-double division operation.
// This implementation is shamelessly cribbed from Apple's DDRT, circa 1993(!)

#include "DD.h"

long double __gcc_qdiv(long double a, long double b) {
  static const uint32_t infinityHi = UINT32_C(0x7ff00000);
  DD dst = {.ld = a}, src = {.ld = b};

double yHi, yLo, qHi, qLo;
  double yq, tmp, q;

q = x / y;

// Detect special cases
  if (q == 0.0) {
    dst.s.hi = q;
    dst.s.lo = 0.0;
    return dst.ld;
  }

const doublebits qBits = {.d = q};
  if (((uint32_t)(qBits.x >> 32) & infinityHi) == infinityHi) {
    dst.s.hi = q;
    dst.s.lo = 0.0;
    return dst.ld;
  }

yHi = high26bits(y);
  qHi = high26bits(q);

yq = y * q;
  yLo = y - yHi;
  qLo = q - qHi;

tmp = LOWORDER(yq, yHi, yLo, qHi, qLo);
  tmp = (x - yq) - tmp;
  tmp = ((tmp + x1) - y1 * q) / y;
  x = q + tmp;

dst.s.lo = (q - x) + tmp;
  dst.s.hi = x;

return dst.ld;
}

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Editing: gcc_qdiv.c

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