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DD.h
(1.12 KB)
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divtc3.c
(3.23 KB)
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fixtfdi.c
(3.29 KB)
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fixtfti.c
(1.32 KB)
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fixunstfdi.c
(1.94 KB)
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fixunstfti.c
(4.58 KB)
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floatditf.c
(1.02 KB)
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floattitf.c
(1.97 KB)
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floatunditf.c
(1.25 KB)
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gcc_qadd.c
(1.88 KB)
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gcc_qdiv.c
(1.25 KB)
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gcc_qmul.c
(1.25 KB)
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gcc_qsub.c
(1.88 KB)
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multc3.c
(2.55 KB)
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restFP.S
(1.44 KB)
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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}; register double x = dst.s.hi, x1 = dst.s.lo, y = src.s.hi, y1 = src.s.lo; 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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