1 /* origin: FreeBSD /usr/src/lib/msun/src/ld80/invtrig.h */
3 * Copyright (c) 2008 David Schultz <das@FreeBSD.ORG>
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30 #if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
32 #define BIAS (LDBL_MAX_EXP - 1)
33 #define MANH_SIZE LDBL_MANH_SIZE
35 /* Constants shared by the long double inverse trig functions. */
50 #define pio2_hi __pio2_hi
51 #define pio2_lo __pio2_lo
53 extern const long double pS0, pS1, pS2, pS3, pS4, pS5, pS6;
54 extern const long double qS1, qS2, qS3, qS4, qS5;
55 extern const long double pi_hi, pi_lo, pio2_hi, pio2_lo;
57 static long double P(long double x)
59 return x * (pS0 + x * (pS1 + x * (pS2 + x * (pS3 +
60 x * (pS4 + x * (pS5 + x * pS6))))));
63 static long double Q(long double x)
65 return 1.0 + x * (qS1 + x * (qS2 + x * (qS3 + x * (qS4 + x * qS5))));