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44 lines
820 B
44 lines
820 B
// SPDX-License-Identifier: GPL-2.0-only |
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/* IEEE754 floating point arithmetic |
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* double precision: common utilities |
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*/ |
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/* |
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* MIPS floating point support |
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* Copyright (C) 1994-2000 Algorithmics Ltd. |
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*/ |
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#include "ieee754dp.h" |
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union ieee754dp ieee754dp_fint(int x) |
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{ |
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u64 xm; |
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int xe; |
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int xs; |
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ieee754_clearcx(); |
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if (x == 0) |
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return ieee754dp_zero(0); |
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if (x == 1 || x == -1) |
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return ieee754dp_one(x < 0); |
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if (x == 10 || x == -10) |
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return ieee754dp_ten(x < 0); |
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xs = (x < 0); |
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if (xs) { |
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if (x == (1 << 31)) |
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xm = ((unsigned) 1 << 31); /* max neg can't be safely negated */ |
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else |
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xm = -x; |
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} else { |
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xm = x; |
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} |
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/* normalize - result can never be inexact or overflow */ |
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xe = DP_FBITS; |
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while ((xm >> DP_FBITS) == 0) { |
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xm <<= 1; |
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xe--; |
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} |
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return builddp(xs, xe + DP_EBIAS, xm & ~DP_HIDDEN_BIT); |
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}
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