X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Flogl.c;h=ffd8103813eade25cc51b70944b93d78a49b8cf8;hb=04ccbdca6d88738e23e0d6a622ad33854c468646;hp=2139b2ab67732bbb3457ca49a87e5ebeafa1193d;hpb=b69f695acedd4ce2798ef9ea28d834ceccc789bd;p=musl diff --git a/src/math/logl.c b/src/math/logl.c index 2139b2ab..ffd81038 100644 --- a/src/math/logl.c +++ b/src/math/logl.c @@ -69,7 +69,7 @@ long double logl(long double x) * 1/sqrt(2) <= x < sqrt(2) * Theoretical peak relative error = 2.32e-20 */ -static long double P[] = { +static const long double P[] = { 4.5270000862445199635215E-5L, 4.9854102823193375972212E-1L, 6.5787325942061044846969E0L, @@ -78,7 +78,7 @@ static long double P[] = { 5.7112963590585538103336E1L, 2.0039553499201281259648E1L, }; -static long double Q[] = { +static const long double Q[] = { /* 1.0000000000000000000000E0,*/ 1.5062909083469192043167E1L, 8.3047565967967209469434E1L, @@ -93,13 +93,13 @@ static long double Q[] = { * 1/sqrt(2) <= x < sqrt(2) * Theoretical peak relative error = 6.16e-22 */ -static long double R[4] = { +static const long double R[4] = { 1.9757429581415468984296E-3L, -7.1990767473014147232598E-1L, 1.0777257190312272158094E1L, -3.5717684488096787370998E1L, }; -static long double S[4] = { +static const long double S[4] = { /* 1.00000000000000000000E0L,*/ -2.6201045551331104417768E1L, 1.9361891836232102174846E2L, @@ -119,8 +119,8 @@ long double logl(long double x) return x; if (x == INFINITY) return x; - if (x <= 0.0L) { - if (x == 0.0L) + if (x <= 0.0) { + if (x == 0.0) return -INFINITY; return NAN; } @@ -137,12 +137,12 @@ long double logl(long double x) if (e > 2 || e < -2) { if (x < SQRTH) { /* 2(2x-1)/(2x+1) */ e -= 1; - z = x - 0.5L; - y = 0.5L * z + 0.5L; + z = x - 0.5; + y = 0.5 * z + 0.5; } else { /* 2 (x-1)/(x+1) */ - z = x - 0.5L; - z -= 0.5L; - y = 0.5L * x + 0.5L; + z = x - 0.5; + z -= 0.5; + y = 0.5 * x + 0.5; } x = z / y; z = x*x; @@ -156,14 +156,14 @@ long double logl(long double x) /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */ if (x < SQRTH) { e -= 1; - x = ldexpl(x, 1) - 1.0L; /* 2x - 1 */ + x = 2.0*x - 1.0; } else { - x = x - 1.0L; + x = x - 1.0; } z = x*x; y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 6)); y = y + e * C2; - z = y - ldexpl(z, -1); /* y - 0.5 * z */ + z = y - 0.5*z; /* Note, the sum of above terms does not exceed x/4, * so it contributes at most about 1/4 lsb to the error. */