diff options
Diffstat (limited to 'arch/mips/math-emu/dp_sub.c')
| -rw-r--r-- | arch/mips/math-emu/dp_sub.c | 55 |
1 files changed, 27 insertions, 28 deletions
diff --git a/arch/mips/math-emu/dp_sub.c b/arch/mips/math-emu/dp_sub.c index 91e0a4b5cbc..7a174029043 100644 --- a/arch/mips/math-emu/dp_sub.c +++ b/arch/mips/math-emu/dp_sub.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. @@ -18,23 +16,22 @@ * * 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 "ieee754dp.h" -ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) +union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y) { + int s; + COMPXDP; COMPYDP; EXPLODEXDP; EXPLODEYDP; - CLEARCX; + ieee754_clearcx(); FLUSHXDP; FLUSHYDP; @@ -51,8 +48,8 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_NORM): case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_DNORM): case CLPAIR(IEEE754_CLASS_SNAN, IEEE754_CLASS_INF): - SETCX(IEEE754_INVALID_OPERATION); - return ieee754dp_nanxcpt(ieee754dp_indef(), "sub", x, y); + ieee754_setcx(IEEE754_INVALID_OPERATION); + return ieee754dp_nanxcpt(ieee754dp_indef()); case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_QNAN): case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_QNAN): @@ -68,14 +65,14 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) return x; - /* Infinity handling - */ - + /* + * Infinity handling + */ case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_INF): if (xs != ys) return x; - SETCX(IEEE754_INVALID_OPERATION); - return ieee754dp_xcpt(ieee754dp_indef(), "sub", x, y); + ieee754_setcx(IEEE754_INVALID_OPERATION); + return ieee754dp_indef(); case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_INF): case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_INF): @@ -87,15 +84,14 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) case CLPAIR(IEEE754_CLASS_INF, IEEE754_CLASS_DNORM): return x; - /* Zero handling - */ - + /* + * Zero handling + */ case CLPAIR(IEEE754_CLASS_ZERO, IEEE754_CLASS_ZERO): if (xs != ys) return x; else - return ieee754dp_zero(ieee754_csr.rm == - IEEE754_RD); + return ieee754dp_zero(ieee754_csr.rm == FPU_CSR_RD); case CLPAIR(IEEE754_CLASS_NORM, IEEE754_CLASS_ZERO): case CLPAIR(IEEE754_CLASS_DNORM, IEEE754_CLASS_ZERO): @@ -136,15 +132,17 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) ym <<= 3; if (xe > ye) { - /* have to shift y fraction right to align + /* + * Have to shift y fraction right to align */ - int s = xe - ye; + s = xe - ye; ym = XDPSRS(ym, s); ye += s; } else if (ye > xe) { - /* have to shift x fraction right to align + /* + * Have to shift x fraction right to align */ - int s = ye - xe; + s = ye - xe; xm = XDPSRS(xm, s); xe += s; } @@ -158,7 +156,7 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) xe = xe; xs = xs; - if (xm >> (DP_MBITS + 1 + 3)) { /* carry out */ + if (xm >> (DP_FBITS + 1 + 3)) { /* carry out */ xm = XDPSRS1(xm); /* shift preserving sticky */ xe++; } @@ -173,7 +171,7 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) xs = ys; } if (xm == 0) { - if (ieee754_csr.rm == IEEE754_RD) + if (ieee754_csr.rm == FPU_CSR_RD) return ieee754dp_zero(1); /* round negative inf. => sign = -1 */ else return ieee754dp_zero(0); /* other round modes => sign = 1 */ @@ -181,10 +179,11 @@ ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y) /* normalize to rounding precision */ - while ((xm >> (DP_MBITS + 3)) == 0) { + while ((xm >> (DP_FBITS + 3)) == 0) { xm <<= 1; xe--; } } - DPNORMRET2(xs, xe, xm, "sub", x, y); + + return ieee754dp_format(xs, xe, xm); } |