diff options
Diffstat (limited to 'arch/mips/math-emu/sp_fdp.c')
| -rw-r--r-- | arch/mips/math-emu/sp_fdp.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/arch/mips/math-emu/sp_fdp.c b/arch/mips/math-emu/sp_fdp.c index 5c1d8aa6bfd..90b9ec45e98 100644 --- a/arch/mips/math-emu/sp_fdp.c +++ b/arch/mips/math-emu/sp_fdp.c @@ -5,8 +5,6 @@ * MIPS floating point support * Copyright (C) 1994-2000 Algorithmics Ltd. * - * ######################################################################## - * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. @@ -18,17 +16,16 @@ * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * ######################################################################## + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ - #include "ieee754sp.h" #include "ieee754dp.h" union ieee754sp ieee754sp_fdp(union ieee754dp x) { + u32 rm; + COMPXDP; union ieee754sp nan; @@ -42,16 +39,20 @@ union ieee754sp ieee754sp_fdp(union ieee754dp x) case IEEE754_CLASS_SNAN: ieee754_setcx(IEEE754_INVALID_OPERATION); return ieee754sp_nanxcpt(ieee754sp_indef()); + case IEEE754_CLASS_QNAN: nan = buildsp(xs, SP_EMAX + 1 + SP_EBIAS, (u32) (xm >> (DP_FBITS - SP_FBITS))); if (!ieee754sp_isnan(nan)) nan = ieee754sp_indef(); return ieee754sp_nanxcpt(nan); + case IEEE754_CLASS_INF: return ieee754sp_inf(xs); + case IEEE754_CLASS_ZERO: return ieee754sp_zero(xs); + case IEEE754_CLASS_DNORM: /* can't possibly be sp representable */ ieee754_setcx(IEEE754_UNDERFLOW); @@ -60,18 +61,16 @@ union ieee754sp ieee754sp_fdp(union ieee754dp x) (ieee754_csr.rm == IEEE754_RD && xs)) return ieee754sp_mind(xs); return ieee754sp_zero(xs); + case IEEE754_CLASS_NORM: break; } - { - u32 rm; + /* + * Convert from DP_FBITS to SP_FBITS+3 with sticky right shift. + */ + rm = (xm >> (DP_FBITS - (SP_FBITS + 3))) | + ((xm << (64 - (DP_FBITS - (SP_FBITS + 3)))) != 0); - /* convert from DP_FBITS to SP_FBITS+3 with sticky right shift - */ - rm = (xm >> (DP_FBITS - (SP_FBITS + 3))) | - ((xm << (64 - (DP_FBITS - (SP_FBITS + 3)))) != 0); - - return ieee754sp_format(xs, xe, rm); - } + return ieee754sp_format(xs, xe, rm); } |