0545e9dc6d
commit d1edce71135cc6d98c0a4b5729774542b676e769 Author: sophgo-forum-service <forum_service@sophgo.com> Date: Fri Mar 15 16:07:33 2024 +0800 [fix] recommend using ssh method to clone repo. [fix] fix sensor driver repo branch name.
50 lines
909 B
C
50 lines
909 B
C
// 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;
|
|
}
|