hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

MIPS: math-emu: Factor out NaN FP format conversions 

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9686/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maciej W. Rozycki 2015-04-03 23:25:23 +01:00 committed by Ralf Baechle
parent ec98f9a01f
commit d19cf86e2e
2 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/mips/math-emu/dp_fsp.c
View File

@ -22,6 +22,12 @@
#include "ieee754sp.h" #include "ieee754sp.h"
#include "ieee754dp.h" #include "ieee754dp.h"
static inline union ieee754dp ieee754dp_nan_fsp(int xs, u64 xm)
{
return builddp(xs, DP_EMAX + 1 + DP_EBIAS,
xm << (DP_FBITS - SP_FBITS));
}
union ieee754dp ieee754dp_fsp(union ieee754sp x) union ieee754dp ieee754dp_fsp(union ieee754sp x)
{ {
COMPXSP; COMPXSP;
@ -38,11 +44,8 @@ union ieee754dp ieee754dp_fsp(union ieee754sp x)
return ieee754dp_nanxcpt(ieee754dp_indef()); return ieee754dp_nanxcpt(ieee754dp_indef());
case IEEE754_CLASS_QNAN: case IEEE754_CLASS_QNAN:
return ieee754dp_nanxcpt(builddp(xs, return ieee754dp_nanxcpt(ieee754dp_nan_fsp(xs, xm));
DP_EMAX + 1 + DP_EBIAS,
((u64) xm
<< (DP_FBITS -
SP_FBITS))));
case IEEE754_CLASS_INF: case IEEE754_CLASS_INF:
return ieee754dp_inf(xs); return ieee754dp_inf(xs);

9
arch/mips/math-emu/sp_fdp.c
View File

@ -22,6 +22,12 @@
#include "ieee754sp.h" #include "ieee754sp.h"
#include "ieee754dp.h" #include "ieee754dp.h"
static inline union ieee754sp ieee754sp_nan_fdp(int xs, u64 xm)
{
return buildsp(xs, SP_EMAX + 1 + SP_EBIAS,
xm >> (DP_FBITS - SP_FBITS));
}
union ieee754sp ieee754sp_fdp(union ieee754dp x) union ieee754sp ieee754sp_fdp(union ieee754dp x)
{ {
u32 rm; u32 rm;
@ -41,8 +47,7 @@ union ieee754sp ieee754sp_fdp(union ieee754dp x)
return ieee754sp_nanxcpt(ieee754sp_indef()); return ieee754sp_nanxcpt(ieee754sp_indef());
case IEEE754_CLASS_QNAN: case IEEE754_CLASS_QNAN:
nan = buildsp(xs, SP_EMAX + 1 + SP_EBIAS, (u32) nan = ieee754sp_nan_fdp(xs, xm);
(xm >> (DP_FBITS - SP_FBITS)));
if (!ieee754sp_isnan(nan)) if (!ieee754sp_isnan(nan))
nan = ieee754sp_indef(); nan = ieee754sp_indef();
return ieee754sp_nanxcpt(nan); return ieee754sp_nanxcpt(nan);