// SPDX-License-Identifier: GPL-2.0-only | |
/* IEEE754 floating point arithmetic | |
* single precision | |
*/ | |
/* | |
* MIPS floating point support | |
* Copyright (C) 1994-2000 Algorithmics Ltd. | |
*/ | |
#include "ieee754sp.h" | |
union ieee754sp ieee754sp_neg(union ieee754sp x) | |
{ | |
union ieee754sp y; | |
if (ieee754_csr.abs2008) { | |
y = x; | |
SPSIGN(y) = !SPSIGN(x); | |
} else { | |
unsigned int oldrm; | |
oldrm = ieee754_csr.rm; | |
ieee754_csr.rm = FPU_CSR_RD; | |
y = ieee754sp_sub(ieee754sp_zero(0), x); | |
ieee754_csr.rm = oldrm; | |
} | |
return y; | |
} | |
union ieee754sp ieee754sp_abs(union ieee754sp x) | |
{ | |
union ieee754sp y; | |
if (ieee754_csr.abs2008) { | |
y = x; | |
SPSIGN(y) = 0; | |
} else { | |
unsigned int oldrm; | |
oldrm = ieee754_csr.rm; | |
ieee754_csr.rm = FPU_CSR_RD; | |
if (SPSIGN(x)) | |
y = ieee754sp_sub(ieee754sp_zero(0), x); | |
else | |
y = ieee754sp_add(ieee754sp_zero(0), x); | |
ieee754_csr.rm = oldrm; | |
} | |
return y; | |
} |