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// SPDX-License-Identifier: GPL-2.0-only
/* IEEE754 floating point arithmetic
* double precision: common utilities
*/
/*
* MIPS floating point support
* Copyright (C) 1994-2000 Algorithmics Ltd.
*/
#include "ieee754dp.h"
union ieee754dp ieee754dp_neg(union ieee754dp x)
{
union ieee754dp y;
if (ieee754_csr.abs2008) {
y = x;
DPSIGN(y) = !DPSIGN(x);
} else {
unsigned int oldrm;
oldrm = ieee754_csr.rm;
ieee754_csr.rm = FPU_CSR_RD;
y = ieee754dp_sub(ieee754dp_zero(0), x);
ieee754_csr.rm = oldrm;
}
return y;
}
union ieee754dp ieee754dp_abs(union ieee754dp x)
{
union ieee754dp y;
if (ieee754_csr.abs2008) {
y = x;
DPSIGN(y) = 0;
} else {
unsigned int oldrm;
oldrm = ieee754_csr.rm;
ieee754_csr.rm = FPU_CSR_RD;
if (DPSIGN(x))
y = ieee754dp_sub(ieee754dp_zero(0), x);
else
y = ieee754dp_add(ieee754dp_zero(0), x);
ieee754_csr.rm = oldrm;
}
return y;
}
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