diff options
Diffstat (limited to 'lib/msun/src/e_expf.c')
| -rw-r--r-- | lib/msun/src/e_expf.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/lib/msun/src/e_expf.c b/lib/msun/src/e_expf.c index 949fa54..45eda01 100644 --- a/lib/msun/src/e_expf.c +++ b/lib/msun/src/e_expf.c @@ -43,7 +43,7 @@ static volatile float twom100 = 7.8886090522e-31; /* 2**-100=0x0d800000 */ float __ieee754_expf(float x) /* default IEEE double exp */ { - float y,hi=0.0,lo=0.0,c,t; + float y,hi=0.0,lo=0.0,c,t,twopk; int32_t k=0,xsb; u_int32_t hx; @@ -80,18 +80,17 @@ __ieee754_expf(float x) /* default IEEE double exp */ /* x is now in primary range */ t = x*x; + if(k >= -125) + SET_FLOAT_WORD(twopk,0x3f800000+(k<<23)); + else + SET_FLOAT_WORD(twopk,0x3f800000+((k+100)<<23)); c = x - t*(P1+t*P2); if(k==0) return one-((x*c)/(c-(float)2.0)-x); else y = one-((lo-(x*c)/((float)2.0-c))-hi); if(k >= -125) { - u_int32_t hy; - GET_FLOAT_WORD(hy,y); - SET_FLOAT_WORD(y,hy+(k<<23)); /* add k to y's exponent */ - return y; + if(k==128) return y*2.0F*0x1p127F; + return y*twopk; } else { - u_int32_t hy; - GET_FLOAT_WORD(hy,y); - SET_FLOAT_WORD(y,hy+((k+100)<<23)); /* add k to y's exponent */ - return y*twom100; + return y*twopk*twom100; } } |
