diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_jnf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_jnf.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/sysdeps/ieee754/flt-32/e_jnf.c b/sysdeps/ieee754/flt-32/e_jnf.c index 9e5279c30a..34c4d95a32 100644 --- a/sysdeps/ieee754/flt-32/e_jnf.c +++ b/sysdeps/ieee754/flt-32/e_jnf.c @@ -25,7 +25,6 @@ static const float #else static float #endif -invsqrtpi= 5.6418961287e-01, /* 0x3f106ebb */ two = 2.0000000000e+00, /* 0x40000000 */ one = 1.0000000000e+00; /* 0x3F800000 */ @@ -62,7 +61,7 @@ static float zero = 0.0000000000e+00; if(n==1) return(__ieee754_j1f(x)); sgn = (n&1)&(hx>>31); /* even n -- 0, odd n -- sign(x) */ x = fabsf(x); - if(ix==0||ix>=0x7f800000) /* if x is 0 or inf */ + if(ix==0||ix>=0x7f800000) /* if x is 0 or inf */ b = zero; else if((float)n<=x) { /* Safe to use J(n+1,x)=2n/x *J(n,x)-J(n-1,x) */ @@ -90,11 +89,11 @@ static float zero = 0.0000000000e+00; } } else { /* use backward recurrence */ - /* x x^2 x^2 + /* x x^2 x^2 * J(n,x)/J(n-1,x) = ---- ------ ------ ..... * 2n - 2(n+1) - 2(n+2) * - * 1 1 1 + * 1 1 1 * (for large x) = ---- ------ ------ ..... * 2n 2(n+1) 2(n+2) * -- - ------ - ------ - @@ -107,7 +106,7 @@ static float zero = 0.0000000000e+00; * 1 * w - ----------------- * 1 - * w+h - --------- + * w+h - --------- * w+2h - ... * * To determine how many terms needed, let @@ -144,15 +143,15 @@ static float zero = 0.0000000000e+00; v = two/x; tmp = tmp*__ieee754_logf(fabsf(v*tmp)); if(tmp<(float)8.8721679688e+01) { - for(i=n-1,di=(float)(i+i);i>0;i--){ + for(i=n-1,di=(float)(i+i);i>0;i--){ temp = b; b *= di; b = b/x - a; a = temp; di -= two; - } + } } else { - for(i=n-1,di=(float)(i+i);i>0;i--){ + for(i=n-1,di=(float)(i+i);i>0;i--){ temp = b; b *= di; b = b/x - a; @@ -164,9 +163,9 @@ static float zero = 0.0000000000e+00; t /= b; b = one; } - } + } } - b = (t*__ieee754_j0f(x)/b); + b = (t*__ieee754_j0f(x)/b); } } if(sgn==1) return -b; else return b; |