diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_jnf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_jnf.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sysdeps/ieee754/flt-32/e_jnf.c b/sysdeps/ieee754/flt-32/e_jnf.c index dc4b371bc1..ec5a81b653 100644 --- a/sysdeps/ieee754/flt-32/e_jnf.c +++ b/sysdeps/ieee754/flt-32/e_jnf.c @@ -27,6 +27,8 @@ static const float zero = 0.0000000000e+00; float __ieee754_jnf(int n, float x) { + float ret; + { int32_t i,hx,ix, sgn; float a, b, temp, di; float z, w; @@ -47,8 +49,9 @@ __ieee754_jnf(int n, float x) if(n==1) return(__ieee754_j1f(x)); sgn = (n&1)&(hx>>31); /* even n -- 0, odd n -- sign(x) */ x = fabsf(x); + SET_RESTORE_ROUNDF (FE_TONEAREST); if(__builtin_expect(ix==0||ix>=0x7f800000, 0)) /* if x is 0 or inf */ - b = zero; + return sgn == 1 ? -zero : zero; else if((float)n<=x) { /* Safe to use J(n+1,x)=2n/x *J(n,x)-J(n-1,x) */ a = __ieee754_j0f(x); @@ -163,7 +166,11 @@ __ieee754_jnf(int n, float x) b = (t * w / a); } } - if(sgn==1) return -b; else return b; + if(sgn==1) ret = -b; else ret = b; + } + if (ret == 0) + ret = __copysignf (FLT_MIN, ret) * FLT_MIN; + return ret; } strong_alias (__ieee754_jnf, __jnf_finite) |