diff options
Diffstat (limited to 'lib/libm/erfl.c')
| -rw-r--r-- | lib/libm/erfl.c | 66 |
1 files changed, 12 insertions, 54 deletions
diff --git a/lib/libm/erfl.c b/lib/libm/erfl.c index bb571734..143f6035 100644 --- a/lib/libm/erfl.c +++ b/lib/libm/erfl.c @@ -247,17 +247,8 @@ static long double erfc1(long double x) long double s, P, Q; s = fabsl(x) - 1; - P = pa[0] + - s * (pa[1] + - s * (pa[2] + - s * (pa[3] + - s * (pa[4] + - s * (pa[5] + s * (pa[6] + s * pa[7])))))); - Q = qa[0] + - s * (qa[1] + - s * (qa[2] + - s * (qa[3] + - s * (qa[4] + s * (qa[5] + s * (qa[6] + s)))))); + P = pa[0] + s * (pa[1] + s * (pa[2] + s * (pa[3] + s * (pa[4] + s * (pa[5] + s * (pa[6] + s * pa[7])))))); + Q = qa[0] + s * (qa[1] + s * (qa[2] + s * (qa[3] + s * (qa[4] + s * (qa[5] + s * (qa[6] + s)))))); return 1 - erx - P / Q; } @@ -274,41 +265,18 @@ static long double erfc2(uint32_t ix, long double x) if (ix < 0x4000b6db) { /* 1.25 <= |x| < 2.857 ~ 1/.35 */ R = ra[0] + s * (ra[1] + - s * (ra[2] + - s * (ra[3] + - s * (ra[4] + - s * (ra[5] + - s * (ra[6] + - s * (ra[7] + s * ra[8]))))))); + s * (ra[2] + s * (ra[3] + s * (ra[4] + s * (ra[5] + s * (ra[6] + s * (ra[7] + s * ra[8]))))))); S = sa[0] + s * (sa[1] + s * (sa[2] + - s * (sa[3] + - s * (sa[4] + - s * (sa[5] + - s * (sa[6] + - s * (sa[7] + - s * (sa[8] + s)))))))); + s * (sa[3] + s * (sa[4] + s * (sa[5] + s * (sa[6] + s * (sa[7] + s * (sa[8] + s)))))))); } else if (ix < 0x4001d555) { /* 2.857 <= |x| < 6.6666259765625 */ R = rb[0] + - s * (rb[1] + - s * (rb[2] + - s * (rb[3] + - s * (rb[4] + - s * (rb[5] + - s * (rb[6] + s * rb[7])))))); - S = sb[0] + - s * (sb[1] + - s * (sb[2] + - s * (sb[3] + - s * (sb[4] + - s * (sb[5] + s * (sb[6] + s)))))); + s * (rb[1] + s * (rb[2] + s * (rb[3] + s * (rb[4] + s * (rb[5] + s * (rb[6] + s * rb[7])))))); + S = sb[0] + s * (sb[1] + s * (sb[2] + s * (sb[3] + s * (sb[4] + s * (sb[5] + s * (sb[6] + s)))))); } else { /* 6.666 <= |x| < 107 (erfc only) */ - R = rc[0] + - s * (rc[1] + - s * (rc[2] + s * (rc[3] + s * (rc[4] + s * rc[5])))); - S = sc[0] + - s * (sc[1] + s * (sc[2] + s * (sc[3] + s * (sc[4] + s)))); + R = rc[0] + s * (rc[1] + s * (rc[2] + s * (rc[3] + s * (rc[4] + s * rc[5])))); + S = sc[0] + s * (sc[1] + s * (sc[2] + s * (sc[3] + s * (sc[4] + s)))); } u.f = x; u.i.m &= -1ULL << 40; @@ -331,13 +299,8 @@ long double erfl(long double x) return 0.125 * (8 * x + efx8 * x); /* avoid underflow */ } z = x * x; - r = pp[0] + - z * (pp[1] + - z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5])))); - s = qq[0] + - z * (qq[1] + - z * (qq[2] + - z * (qq[3] + z * (qq[4] + z * (qq[5] + z))))); + r = pp[0] + z * (pp[1] + z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5])))); + s = qq[0] + z * (qq[1] + z * (qq[2] + z * (qq[3] + z * (qq[4] + z * (qq[5] + z))))); y = r / s; return x + x * y; } @@ -362,13 +325,8 @@ long double erfcl(long double x) if (ix < 0x3fbe0000) /* |x| < 2**-65 */ return 1.0 - x; z = x * x; - r = pp[0] + - z * (pp[1] + - z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5])))); - s = qq[0] + - z * (qq[1] + - z * (qq[2] + - z * (qq[3] + z * (qq[4] + z * (qq[5] + z))))); + r = pp[0] + z * (pp[1] + z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5])))); + s = qq[0] + z * (qq[1] + z * (qq[2] + z * (qq[3] + z * (qq[4] + z * (qq[5] + z))))); y = r / s; if (ix < 0x3ffd8000) /* x < 1/4 */ return 1.0 - (x + x * y); |