diff options
Diffstat (limited to 'lib/msun/src/e_acosf.c')
| -rw-r--r-- | lib/msun/src/e_acosf.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/msun/src/e_acosf.c b/lib/msun/src/e_acosf.c index ac0d8dd..c9f62cc 100644 --- a/lib/msun/src/e_acosf.c +++ b/lib/msun/src/e_acosf.c @@ -38,10 +38,11 @@ __ieee754_acosf(float x) int32_t hx,ix; GET_FLOAT_WORD(hx,x); ix = hx&0x7fffffff; - if(ix==0x3f800000) { /* |x|==1 */ - if(hx>0) return 0.0; /* acos(1) = 0 */ - else return pi+(float)2.0*pio2_lo; /* acos(-1)= pi */ - } else if(ix>0x3f800000) { /* |x| >= 1 */ + if(ix>=0x3f800000) { /* |x| >= 1 */ + if(ix==0x3f800000) { /* |x| == 1 */ + if(hx>0) return 0.0; /* acos(1) = 0 */ + else return pi+(float)2.0*pio2_lo; /* acos(-1)= pi */ + } return (x-x)/(x-x); /* acos(|x|>1) is NaN */ } if(ix<0x3f000000) { /* |x| < 0.5 */ @@ -55,14 +56,14 @@ __ieee754_acosf(float x) z = (one+x)*(float)0.5; p = z*(pS0+z*(pS1+z*pS2)); q = one+z*qS1; - s = __ieee754_sqrtf(z); + s = sqrtf(z); r = p/q; w = r*s-pio2_lo; return pi - (float)2.0*(s+w); } else { /* x > 0.5 */ int32_t idf; z = (one-x)*(float)0.5; - s = __ieee754_sqrtf(z); + s = sqrtf(z); df = s; GET_FLOAT_WORD(idf,df); SET_FLOAT_WORD(df,idf&0xfffff000); |
