diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_scalbn.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_scalbn.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/sysdeps/libm-ieee754/s_scalbn.c b/sysdeps/libm-ieee754/s_scalbn.c index 439b966e69..0ce0ffdf2f 100644 --- a/sysdeps/libm-ieee754/s_scalbn.c +++ b/sysdeps/libm-ieee754/s_scalbn.c @@ -35,10 +35,10 @@ huge = 1.0e+300, tiny = 1.0e-300; #ifdef __STDC__ - double __scalbn (double x, int n) + double __scalbn (double x, long int n) #else double __scalbn (x,n) - double x; int n; + double x; long int n; #endif { int32_t k,hx,lx; @@ -49,17 +49,16 @@ tiny = 1.0e-300; x *= two54; GET_HIGH_WORD(hx,x); k = ((hx&0x7ff00000)>>20) - 54; - if (n< -50000) return tiny*x; /*underflow*/ } if (k==0x7ff) return x+x; /* NaN or Inf */ k = k+n; - if (k > 0x7fe) return huge*__copysign(huge,x); /* overflow */ + if (n> 50000 || k > 0x7fe) + return huge*__copysign(huge,x); /* overflow */ + if (n< -50000) return tiny*__copysign(tiny,x); /*underflow*/ if (k > 0) /* normal result */ {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;} if (k <= -54) - if (n > 50000) /* in case integer overflow in n+k */ - return huge*__copysign(huge,x); /*overflow*/ - else return tiny*__copysign(tiny,x); /*underflow*/ + return tiny*__copysign(tiny,x); /*underflow*/ k += 54; /* subnormal result */ SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x*twom54; |