forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
891 B
49 lines
891 B
// 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; |
|
}
|
|
|