diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/s_floorl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_floorl.c | 37 |
1 files changed, 14 insertions, 23 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_floorl.c b/sysdeps/ieee754/ldbl-128/s_floorl.c index c72d5d4330..14a0efef85 100644 --- a/sysdeps/ieee754/ldbl-128/s_floorl.c +++ b/sysdeps/ieee754/ldbl-128/s_floorl.c @@ -22,15 +22,11 @@ static char rcsid[] = "$NetBSD: $"; * Return x rounded toward -inf to integral value * Method: * Bit twiddling. - * Exception: - * Inexact flag raised if x not equal to floor(x). */ #include <math.h> #include <math_private.h> -static const long double huge = 1.0e4930L; - long double __floorl(long double x) { int64_t i0,i1,j0; @@ -38,19 +34,16 @@ long double __floorl(long double x) GET_LDOUBLE_WORDS64(i0,i1,x); j0 = ((i0>>48)&0x7fff)-0x3fff; if(j0<48) { - if(j0<0) { /* raise inexact if x != 0 */ - if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */ - if(i0>=0) {i0=i1=0;} - else if(((i0&0x7fffffffffffffffLL)|i1)!=0) - { i0=0xbfff000000000000ULL;i1=0;} - } + if(j0<0) { + /* return 0*sign(x) if |x|<1 */ + if(i0>=0) {i0=i1=0;} + else if(((i0&0x7fffffffffffffffLL)|i1)!=0) + { i0=0xbfff000000000000ULL;i1=0;} } else { i = (0x0000ffffffffffffULL)>>j0; if(((i0&i)|i1)==0) return x; /* x is integral */ - if(huge+x>0.0) { /* raise inexact flag */ - if(i0<0) i0 += (0x0001000000000000LL)>>j0; - i0 &= (~i); i1=0; - } + if(i0<0) i0 += (0x0001000000000000LL)>>j0; + i0 &= (~i); i1=0; } } else if (j0>111) { if(j0==0x4000) return x+x; /* inf or NaN */ @@ -58,17 +51,15 @@ long double __floorl(long double x) } else { i = -1ULL>>(j0-48); if((i1&i)==0) return x; /* x is integral */ - if(huge+x>0.0) { /* raise inexact flag */ - if(i0<0) { - if(j0==48) i0+=1; - else { - j = i1+(1LL<<(112-j0)); - if(j<i1) i0 +=1 ; /* got a carry */ - i1=j; - } + if(i0<0) { + if(j0==48) i0+=1; + else { + j = i1+(1LL<<(112-j0)); + if(j<i1) i0 +=1 ; /* got a carry */ + i1=j; } - i1 &= (~i); } + i1 &= (~i); } SET_LDOUBLE_WORDS64(x,i0,i1); return x; |